Active filters amplify desired signals while rejecting unwanted frequencies, and can be tailored to meet application-specific requirements in electronics.
Amplifiers boost signal strength, match impedance levels, and are essential in many circuit systems, including audio, broadcasting, and telecommunications.
Batteries store and provide electrical energy, come in various types and sizes for multiple uses, rechargeable or single-use.
Capacitors store electrical charge with metallic plates and a dielectric; types vary and can be combined for specific circuit characteristics.
Chip carriers and sockets provide an interface between components and PCBs, enabling easy replacement or upgrading without soldering.
Circuit protection devices prevent damage from overcurrent flow, including fuses, breakers, surge protectors, and voltage regulators.
Connector accessories and support devices aid connector function and longevity, including backshells, grips, clamps, and ties; must be compatible with connector type.
Connectors join electronic circuits to transfer signals and power, come in various sizes and shapes, and include support accessories.
Converters transform DC input to another voltage level, essential in electronic systems, renewable energy, and automotive electronics.
Crystals and resonators generate and stabilize frequency signals via piezoelectricity. They are used in timing, frequency control, and filters. Crystals are quartz and resonators are ceramic with a built-in capacitor.
Semiconductor diodes control current flow in one direction (uni-directionality) via low resistance. Useful for rectification, voltage regulation, detection, and digital logic.
Discover essential electronic components for your devices, including CPU accelerators, system cache controllers, computer processors, motherboards, and graphics computing systems. Enhance device performance and connectivity with reliable components engineered for seamless integration and optimal functionality.
Fiber optics use light pulses to transmit data over long distances. They have superior bandwidth capacity, low signal attenuation, and secure physical properties. They are essential in telecommunications networks today.
Filters enhance signal processing by selectively passing desired frequencies while suppressing unwanted ones. Filters can be passive (using capacitors, resistors, and inductors) or active (using transistors or amplifiers).
Flash devices are non-volatile storage solutions that offer fast read and write speeds, making them ideal for applications requiring high-speed data transfer. These devices utilize flash memory technology, providing reliable storage for data-intensive tasks such as gaming, multimedia, and enterprise-level applications.
General purpose ICs consist of multiple individual circuits or components (e.g., logic gates, amplifiers, oscillators, etc.) that are combined onto a single integrated circuit chip for a smaller physical footprint.
I/O and storage controllers are crucial components in computer systems, managing input/output operations and storage devices. These controllers facilitate efficient data transfer between peripherals, storage drives, and the central processing unit (CPU), enhancing system performance and enabling seamless connectivity.
Inductors store energy in magnetic fields, oppose sudden changes in current flow and prevent electrical surges. Common inductor applications include power supplies, signal filters, and oscillators.
Interface ICs allow efficient device connectivity with high-speed data transfer and low power consumption.They can be ASIC or FPGA types, and may perform additional functions such as sensing, storage, and conversion.
Logic ICs can be used for storage, memory, amplification, and multiplexing. They perform fundamental logical operations on digital input signals (1, 0, H, L) to generate a corresponding digital output signal.
Memory modules are essential components in electronic devices, storing data temporarily or permanently for processing and retrieval. From volatile RAM (Random Access Memory) to non-volatile ROM (Read-Only Memory), memory technologies vary in speed, capacity, and functionality, catering to diverse application requirements.
Memory ICs store digital data and retain the information even when the power is turned off. They come in various types, like RAM (Random Access Memory) for fast data access, and ROM (Read-Only Memory) for permanent data storage.
Miscellaneous semiconductor components are a diverse category of electronic components that combines elements from a mix of component devices.
Optoelectronic devices interact with light. This family of devices can emit light, detect light, generate current, and transmit light signals for long-distance communication.
Oscillators generate repetitive waveforms, such as sine, square, or triangle waves. They are commonly used to produce stable and precise frequencies for applications like clocks, signal generation, and communication systems.
Other Function Semiconductor components are a diverse category of semiconductor components that perform a range of specialized functions.
Passive component networks operate without a power source and support data transmission within system by performing filtering, energy storage, and/or signal coupling functions.
Peripheral ICs (Integrated Circuits) are designed to control and manage the peripheral devices connected to a computer or other electronic device.
Programmable Logic ICs are user-programmable devices that allow designers to create custom logic circuits. These cost saving ICs offer real-time data processing and maximum design flexibilty.
RF (Radio Frequency) and microwave devices are used in telecommunications, wireless communications, and electronic systems. These devices include amplifiers, attenuators, filters, mixers, oscillators, and antennas, and a host of other components.
Voltage regulators are used to ensure a constant output voltage despite power fluctuations and load changes. Linear and switching regulators are common types used to maintain voltage stability.
Relays are electromagnetic switches that are used to control the flow of electrical current in an electrical circuit. Relays are a safe means of providing isolation between a controlling circuit and a controlled circuit.
Resistors control the flow of electrical current in a circuit by introducing a set resistance. These passive components reduce current flow, adjust signal levels, and bias active elements in circuits.
Transducers convert energy from one form to another and are crucial in sensing, audio and control systems. They transform physical measures like temperature, pressure, or sound into electrical signals for circuits.
Storage drives are hardware devices used to store and retrieve digital data in computers and electronic devices. These drives come in various forms, including hard disk drives (HDDs), solid-state drives (SSDs), and hybrid drives, offering different levels of capacity, speed, and durability to suit specific storage needs.
Storage media encompass physical or digital mediums used for storing and preserving digital data. From optical discs and magnetic tapes to USB flash drives and memory cards, storage media come in diverse formats and capacities, offering flexibility and reliability for data storage and archival purposes.
Storage systems comprise hardware and software components designed to manage and store digital data efficiently. These systems range from simple standalone devices to complex network-attached storage (NAS) and storage area network (SAN) solutions, providing scalable storage capacity and data protection features for businesses and enterprises.
Switches control electrical current flow by making or breaking connections. These devices vary in design and application, from basic on/off switches to complex industrial automation systems.
Telecom integrated circuits (ICs) are specialized electronics for telecommunications, tailored to high data rates, low power use, and reliable long-distance transmission. These devices include amplifiers, filters, ADCs, DACs, and more-- and they are often integrated on one chip for specific telecom tasks.
Terminal blocks, or connection terminals, are modular blocks that bring together multiple electrical wires at one connection point. They offer a reliable, organized way to terminate cables.
Thermal management devices control heat in electronic systems, preventing overheating and ensuring optimal performance and reliability. Examples include heat sinks, fans, and thermal interface materials that dissipate or transfer heat away from components.
Transformers are devices that alter electrical voltage levels between circuits through electromagnetic induction. They are vital in power distribution, converting high-voltage electricity for transmission and lower voltage for safe usage.
Transistors are 3-layer semiconductor devices that regulate the flow of electrical current. They function as amplifiers, boosting weak signals, and as switches, controlling the flow of current between terminals.
Triggering devices initiate electronic processes or events in response to specific conditions. These devices support many automated tasks such as activating switches and signals, or turning on lights when motion is detected.
Video cards, also known as graphics cards or GPU (Graphics Processing Unit), are essential components in computers, responsible for rendering graphics and images on display devices. These cards feature dedicated processors and memory, delivering smooth and immersive visual experiences for gaming, multimedia, and professional applications.
Choose from over than a million of proven quality materials. Over 300 manufacturers are presented. From renowned major international players to small independent companies with a proven track record in local markets.
Featured manufacturers
Fujitsu FTR-K1CK024W-HT is a SPDT power/signal relay with 15ms operate time and 30000 cycles electrical life. It has a max AC contact current of 16A@250VAC, making it suitable for applications requiring momentary relay action in industrial settings.
Median Price
-
Lifecycle Status
Suppliers In-Stock
2
In-Stock Inventory
< 1k
Vyrian
1+ parts
100+ parts
1k+ parts
10k+ parts
Nova Conductors
Corohmni
$1.921
Aztec Data Supply Inc.
$2.860
AZTECH Wire
$15.530
$14.920
$14.620
$14.320
Epart123
$3.800
Argo Parts USA
Authorized Procurement Solutions
Continental Prestige Electronics
Bastille Electronics
This product offers SPDT relay function, allowing for versatility in switching between two different circuits.
With a fast operate time of 15 ms, this relay can quickly respond to input signals, making it suitable for time-sensitive applications.
The high electrical life of 30000 cycles ensures durability and long-term reliability of the relay.
The high maximum operating temperature of 105°C allows this relay to operate in a wide range of environmental conditions.
With a maximum AC contact current of 16 A, this relay is capable of handling high-power applications.
The low minimum operating temperature of -40°C ensures this relay can function reliably in cold environments.
This relay is designed for power and signal applications, making it a versatile choice for various electrical systems.
The solder termination type makes it easy to connect the relay to other components, ensuring a secure and reliable connection.
Power & Signal Relays FTR-K1CK024W-HT attributes and parameters. Explore more Power & Signal Relays devices from Fujitsu
Relay Type:
Relay Function:
Relay Action:
Coil/Input Supply Type:
Contact/Output Supply Type:
Contact Maximum AC Current:
Contact Maximum AC Voltage:
Contact Maximum DC Current:
Contact Maximum AC Rating (R Load):
Contact Maximum DC Voltage:
Contact Maximum DC Rating (R Load):
Coil Power:
Coil Resistance:
Coil Maximum DC Voltage:
Coil Maximum DC Coil Current:
Coil DC Operate Voltage:
Coil DC Release Voltage:
Height:
Length/Diameter:
Width:
Dimensions:
Mounting Type:
Activation Time:
Release Time:
Minimum Operating Temperature:
Maximum Operating Temperature:
Termination Type:
Industry Standard Compliance:
Lifespan:
Additional Features:
FTR-K1CK024W-HT Relays trade compliance attributes, and parameters.
ECCN
EAR99
ECCN Governance
EAR
HTS
8536.41.00.50
SB
Product Change Notification (PDF)
Fujitsu Ltd delivers total solutions in the field of information and communication technology. The company provides solutions/system integration services focused on information system consulting and construction, and infrastructure services centered on outsourcing services. Fujitsu provides services across a wide range of countries and regions, including Europe, the Americas, Asia, and Oceania. It operates in three segments namely, Technology Solutions; Ubiqitous Solutions and Device Solutions. Ubiquitous Solutions consists of PCs, mobile phones, and mobilewear. In PCs, Fujitsu's lineup includes desktop and laptop PCs known for energy efficiency, security, and other enhanced features, as well as water- and dust-resistant tablets.
BSS138BK,215
NXP Semiconductors
NXP Semiconductors' BSS138BK,215 is a N-CHANNEL FET with 0.36A max drain current and 0.42W power dissipation. Ideal for applications requiring single configuration and surface mount technology, such as enhancement mode operation in temperatures up to 150°C.
2N2222A
General Transistor
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
1N4148
Temic Semiconductors
RECTIFIER DIODE; Terminal Position: AXIAL; Terminal Form: WIRE; No. of Terminals: 2; Surface Mount: NO; Package Shape: ROUND;
SS14
Rfe International
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
LM555CMX
National Semiconductor
PULSE; RECTANGULAR; Temperature Grade: COMMERCIAL; No. of Terminals: 8; Package Code: SOP; Package Shape: RECTANGULAR; Surface Mount: YES;
Bytesonic Electronics
Dionics-usa
NPN; Configuration: SINGLE; Surface Mount: YES; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
Micro Electronics
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 250 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
CRG0805F10K
TE Connectivity
TE Connectivity's CRG0805F10K is a 10000 ohm fixed resistor with 1% tolerance. It operates b/w -55 to 155 °C and has a power dissipation of 0.125 W. Ideal for surface mount applications in various electronic circuits due to its compact size and high temperature rating.
BAV99
Motorola
RECTIFIER DIODE; Surface Mount: YES; Maximum Output Current: .1 A; Maximum Reverse Recovery Time: .006 us; Maximum Repetitive Peak Reverse Voltage: 70 V; JESD-609 Code: e0;
MMBT3904LT1G
Onsemi
MMBT3904LT1G by Onsemi is a NPN BJT with max. collector-emitter voltage of 40V, hFE of 30, and fT of 300MHz. Ideal for small signal applications in electronics due to its compact size, high transition frequency, and low power dissipation capabilities.
Formosa Microsemi
1N4148WT-7
Diodes Incorporated
1N4148WT-7 by Diodes Inc. is a fast recovery rectifier diode with a max reverse recovery time of 0.004 us and a max forward voltage of 1.25 V. It has a package style of small outline, making it suitable for surface mount applications where high-speed switching is required at temperatures ranging from -65 to 150 °C.
LM2931AZ-5.0RPG
LM2931AZ-5.0RPG by Onsemi is a Fixed Positive Single Output LDO Regulator with 5V nominal output voltage and 0.1A max output current. It features a low dropout voltage of 0.6V, making it suitable for applications requiring stable power supply in temperature range from -40 to 125°C. The package style is cylindrical with matte tin terminal finish, ideal for various electronic devices needing precise voltage regulation.
NE555D
Philips Semiconductors
Analog Waveform Generation Functions; Temperature Grade: COMMERCIAL; No. of Terminals: 8; Package Code: SOP; Package Shape: RECTANGULAR; Surface Mount: YES;
Invensys Sensor Systems
RECTIFIER DIODE; Surface Mount: NO; No. of Phases: 1; Maximum Reverse Recovery Time: .004 us; Config: SINGLE; Maximum Repetitive Peak Reverse Voltage: 100 V;
SMBJ18CA
Bourns
TRANS VOLTAGE SUPPRESSOR DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
LL4148
Semtech Electronics
RECTIFIER DIODE; Terminal Position: END; Terminal Form: WRAP AROUND; No. of Terminals: 2; Surface Mount: YES; Package Shape: ROUND;
STM32F103C8T6
STMicroelectronics
STM32F103C8T6 by STMicroelectronics is a 32-bit microcontroller with 48 terminals, operating at up to 16 MHz. It features 10-Ch 12-Bit ADC channels and 7 DMA channels, suitable for industrial applications requiring low power consumption and high-speed connectivity via CAN, I2C(2), SPI(2), USART(3), USB.
Lite-on Semiconductor
EC2-12SNU
KEMET Corporation
EC2-12SNU by KEMET is a DPDT power/signal relay with 2 FORM C configuration, 1000000 cycle electrical life, and 60W@220VDC max contact DC power rating. It operates at temperatures from -40 to 85 °C and is suitable for AC/DC supply applications in various industries.
G6B-1174P-1-USDC24
Omron
POWER/SIGNAL RELAY;
G6K-2G-YDC5
Omron G6K-2G-YDC5 is a DPDT relay with 2 FORM C, operate time of 3ms, and insulation resistance of 1Gohm. Ideal for power & signal applications, it has a sealed body, operates at -40 to 70°C, and supports AC/DC contact supply type.
EE2-3NU-L
Tokin
POWER/SIGNAL RELAY; Mounting Feature: SURFACE MOUNT-STRAIGHT; Relay Action: MOMENTARY; Relay Function: DPDT; Coil or Input Supply Type: DC; Reference Standard: CSA; TUV; UL;
M39016/6-109M
Esterline Technologies
POWER/SIGNAL RELAY; Mounting Feature: PANEL MOUNT; Relay Action: MOMENTARY; Relay Function: DPDT; Coil or Input Supply Type: DC; Reference Standard: MIL-PRF-39016/6;
M83536/15-020M
Leach International
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: 4PDT; Coil or Input Supply Type: DC; Reference Standard: MIL-PRF-83536/15;
JS-12N-K
Fujitsu Semiconductor America
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: SPDT; Coil or Input Supply Type: DC; Reference Standard: BSI; CQC; CSA; DEMKO; FIMKO; NEMKO; OVE; SEMKO; SEV; UL; VDE;
8-1415535-6
TE Connectivity's 8-1415535-6 is a SPDT power/signal relay with 1 FORM C configuration. It has an operate time of 8 ms and can handle a max AC contact current of 16 A. This relay is commonly used in applications requiring momentary relay action, such as control systems and industrial automation.
2-1393118-6
TE Connectivity 2-1393118-6 is a 3PDT power/signal relay with 3 FORM C configuration. It offers insulation resistance of 100MΩ, dielectric strength up to 1200Vrms, and operates b/w -50°C to +70°C. Ideal for AC/DC applications in panels, it has a coil resistance of 10kΩ and can handle up to 10A current.
PT271024
Tyco Electronics Elcon
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: DPDT; Coil or Input Supply Type: DC; Reference Standard: UL; VDE;
1461402-6
TE Connectivity's 1461402-6 is a SPST power/signal relay with 1 FORM A configuration. It has a max AC contact current of 10A and operates b/w -50°C to +70°C. Ideal for panel mounting, this relay features silver cadmium oxide end contacts and offers dielectric strength up to 3000 Vrms.
Stpi Group
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: 4PDT; Coil or Input Supply Type: DC; Reference Standard: MIL-PRF-83536;
6-1393234-8
TE Connectivity 6-1393234-8 is a DPDT power/signal relay with 12ms operate time and 2000000 cycle electrical life. It has a max AC contact current of 8A@440VAC, suitable for applications requiring momentary relay action in industrial equipment and control systems.
FCB-405-0622M
TE Connectivity's FCB-405-0622M is a 4PDT-CO power/signal relay with hermetically sealed sealing. It has a max operating temperature of 125°C and can handle up to 5A AC/DC contact current. Ideal for panel mounting applications, this relay features gold terminal finish and silver cadmium oxide end contact material.
FM200CAXXX
TE Connectivity's FM200CAXXX is a 3PST-NO-DM power/signal relay with 3 FORM X. It boasts a max AC contact current of 200A and max AC coil voltage of 126.5V, making it ideal for panel mount applications requiring high current switching capabilities. Termination options include solder/quick connect, catering to diverse electrical setups.
RY610048
TE Connectivity's RY610048 is a SPDT power/signal relay with 7ms operate time and 30000 cycles electrical life. Ideal for applications requiring momentary relay action, it has a max AC contact current of 8A@28VDC and operates at temperatures ranging from -40°C to 85°C.
RY-12W-K
Fujitsu Component
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: DPDT; Coil or Input Supply Type: DC; Reference Standard: CSA; UL;
M83536/6-025M
TE Connectivity's M83536/6-025M is a 4PDT-CO power/signal relay with 7ms operate time and 100000 cycles electrical life. Hermetically sealed, it has a max AC contact current of 5A@115VAC and is ideal for applications requiring momentary relay action in harsh environments.
RY211024
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: SPDT; Coil or Input Supply Type: DC; Reference Standard: CSA; OVE; SEMKO; SEV; UL; VDE;
RT424005F
TE Connectivity's RT424005F is a DPDT power/signal relay with 2 FORM C configuration. It operates at 15ms, has an electrical life of 30k cycles, and can handle up to 8A@250VAC. Ideal for applications requiring momentary relay action in circuits with AC supply type.
Partstack™ will investigate all reported instances of potential suspect/counterfeit part listings.
FTR-K1CK005W
Fujitsu
Fujitsu FTR-K1CK005W is a SPDT power/signal relay with 15ms operate time and 30000 cycles electrical life. It has a max AC contact current of 16A@250VAC, making it suitable for applications requiring momentary relay action in temperatures ranging from -40°C to 85°C. With a compact size of 29mm x 12.7mm x 15.7mm, it is ideal for use in various electronic devices that require reliable switching capabilities.
FTR-K1CK005W-HT
Fujitsu FTR-K1CK005W-HT is a SPDT power/signal relay with 15ms operate time and 30000 cycles electrical life. It has a max AC contact current of 16A@250VAC, making it suitable for applications requiring momentary relay action in temperatures ranging from -40°C to 105°C.
FTR-K1CK005W-MA
FTR-K2GAK024T
Fujitsu's FTR-K2GAK024T is a SPST power/signal relay with 30ms operate time and 100000 cycles electrical life. It has a max AC contact current of 20A@250VAC, making it suitable for applications requiring momentary relay action in industrial settings.
FTR-K1AK024T
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: SPST; Coil or Input Supply Type: DC; Reference Standard: CSA; SEMKO; TV-5; UL; VDE;
FTR-K1CK024W-MA
POWER/SIGNAL RELAY; Manufacturer Series: FTR-K1;
FTR-K1CK024W
Fujitsu FTR-K1CK024W is a 24V power/signal relay with SPDT function, 16A@250VAC max AC rating, and 16A@24VDC max DC rating. Ideal for applications requiring momentary relay action in circuits with up to 384W@300VDC power needs. With compact dimensions of 29mm x 12.7mm x 15.7mm, it's suitable for PCB mounting in various electronic devices.
FTR-K1AK012T
FTR-K1AK024T-HT
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: SPST; Coil or Input Supply Type: DC; Reference Standard: CSA; DEMKO; FIMCO; NEMCO; SEMKO; TV-5; UL; VDE;
FTR-K1AK024T-KS
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: SPST; Coil or Input Supply Type: DC; Reference Standard: CSA; UL; VDE;
FTR-K1CK024W-KW
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: SPDT; Coil or Input Supply Type: DC; Reference Standard: UL; VDE;
FTR-K1CK024W-MB
FTR-K1CK012W
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: SPDT; Coil or Input Supply Type: DC; Reference Standard: CSA; SEMKO; TV-5; UL; VDE;
FTR-K2AK012T
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: SPST; Coil or Input Supply Type: DC; Reference Standard: CQC; CSA; DEMKO; FIMKO; NEMKO; SEMKO; UL; VDE;
FTR-K2AK024T
FTR-K3JB012W
Fujitsu's FTR-K3JB012W is a SPST power/signal relay with 20A@250VAC rating. Operates at -40 to 60°C, with 20ms operate time and 10ms release time. Ideal for applications requiring momentary relay action in various industries.
FTR-K3LJB012W
POWER/SIGNAL RELAY; Manufacturer Series: FTR-K3L;
FTR-K1CK024T-KS
POWER/SIGNAL RELAY; Mounting Feature: THROUGH HOLE-STRAIGHT MOUNT; Relay Action: MOMENTARY; Relay Function: SPDT; Coil or Input Supply Type: DC; Reference Standard: CSA; UL; VDE;
Supply Digital Components
$106.00
$54.25
$11.90
$7.29
Quantity
12,000 In-Stock
Total price ≈ $80,197.29
© 2023 All rights reserved