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
Bourns 2036-15-B2LF is a telecom IC gas discharge tube suppressor with 3 terminals, TIN finish, and special shape package. It operates b/w -55°C to 85°C, withstands peak reflow at 260°C for up to 30s. Ideal for telecom protection applications.
Median Price
$1.420
Lifecycle Status
Suppliers In-Stock
10
In-Stock Inventory
1k+
Chip1Stop
1+ parts
$1.220
100+ parts
-
1k+ parts
10k+ parts
Newark
$2.260
$1.660
$1.330
DigiKey
$2.440
$1.429
$1.091
$0.921
Master Electronics
$1.304
$0.981
Verical
$2.702
TTI
$0.980
$0.970
Arrow
$0.962
$0.848
$0.807
VNN
IBS Electronics
$1.839
$1.383
Nova Conductors
Ampacity Inc.
$0.144
Continental Prestige Electronics
$1.740
$1.030
$0.927
Authorized Procurement Solutions
Perfect Parts
Netroflash
Round package shape allows for easy installation and space-saving design.
Having only 3 terminals simplifies the installation process and reduces the likelihood of errors.
Special shape package style makes this protection IC unique and potentially more efficient in certain applications.
High maximum operating temperature ensures reliability and performance even in demanding environments.
Low minimum operating temperature allows for operation in extreme cold conditions without compromising performance.
Tin terminal finish provides good conductivity and corrosion resistance, ensuring long-term reliability.
Short maximum time at peak reflow temperature minimizes the risk of component damage during assembly.
High peak reflow temperature allows for reliable soldering and assembly processes.
Pin/peg terminal form makes it easy to connect this protection IC to other components or circuits.
Gas discharge tube suppressor type is ideal for telecom applications where protection against voltage surges is crucial for equipment safety.
Telecom - Protection ICs 2036-15-B2LF attributes and parameters. Explore more Telecom - Protection ICs devices from Bourns
JESD-30 Code:
JESD-609 Code:
Moisture Sensitivity Level (MSL):
No. of Functions:
No. of Terminals:
Maximum Operating Temperature:
Minimum Operating Temperature:
Package Body Material:
Package Shape:
Package Style (Meter):
Peak Reflow Temperature (C):
Qualification:
Surface Mount:
Telecom IC Type:
Temperature Grade:
Terminal Finish:
Terminal Form:
Terminal Position:
Maximum Time At Peak Reflow Temperature (s):
2036-15-B2LF Telecommunications trade compliance attributes, and parameters.
HTS
8542.39.00.01
SB
8542.39.00.00
Bourns, Inc. is an American electronics company that develops, manufactures and supplies electronic components for a variety of industries including automotive, industrial, instrumentation, medical electronics, consumer equipment and portable electronics. Established in Altadena, California in 1947 by Marlan and Rosemary Bourns, graduates of the University of Michigan, the company was founded to develop and sell electronic components and sensors to the aerospace industry. Bourns has 15 manufacturing facilities around the world and has continued growing through the development of new products and technologies as well as through acquisitions. The company has approximately 9000 employees worldwide.
2N7002
Teledyne Components
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; JESD-30 Code: R-PDSO-G3; Maximum Operating Temperature: 150 Cel; No. of Terminals: 3;
FDC5614P
Fairchild Semiconductor
P-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): 1.6 W; Transistor Application: SWITCHING; Maximum Drain Current (ID): 3 A;
LM555CMX
National Semiconductor
PULSE; RECTANGULAR; Temperature Grade: COMMERCIAL; No. of Terminals: 8; Package Code: SOP; Package Shape: RECTANGULAR; Surface Mount: YES;
2N2222A
Digitron Semiconductors
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
Nte Electronics
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Transistor Application: SWITCHING; Maximum Drain Current (ID): .115 A; No. of Terminals: 3;
SMBJ18CA
General Semiconductor
TRANS VOLTAGE SUPPRESSOR DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
Diotec Semiconductor Ag
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .35 W; Maximum Time At Peak Reflow Temperature (s): 10; Terminal Finish: MATTE TIN;
LM317AEMP/NOPB
Texas Instruments
LM317AEMP/NOPB by Texas Instruments is an adjustable positive single output standard regulator with a max output voltage of 37V and a max output current of 1.5A. It operates in temperatures ranging from -40°C to 125°C, making it suitable for various applications requiring precise voltage regulation in a compact package.
Bytesonic Electronics
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .225 W; Terminal Position: DUAL; Minimum Operating Temperature: -55 Cel;
LM317T
Inchange Semiconductor
Other Regulators; No. of Terminals: 3; Surface Mount: NO; Technology: BIPOLAR; Minimum Output Voltage-1: 1.2 V; No. of Outputs: 1;
SS14
Changzhou Galaxy Century Microelectronics
RECTIFIER DIODE; Surface Mount: YES; No. of Phases: 1; Maximum Non Repetitive Peak Forward Current: 40 A; Technology: SCHOTTKY; No. of Elements: 1;
IRLML6401TRPBF
Infineon Technologies
IRLML6401TRPBF by Infineon is a P-CHANNEL FET for SWITCHING applications. It features a 12V DS Breakdown Voltage, 34A IDM, and 0.05ohm RDS(on). With a small outline package style, it operates in an ambient temperature range of -55 to 150 °C.
STM32H743IIT6
STMicroelectronics
STM32H743IIT6 by STMicroelectronics is a 32-bit microcontroller with integrated cache and a max supply voltage of 3.6V. It is commonly used in industrial applications due to its wide temperature range (-40°C to 85°C) and various connectivity options (CAN, I2C, UART, USB).
Forward International Electronics
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .625 W; Maximum Collector Current (IC): .6 A;
LL4148
Taiwan Semiconductor
RECTIFIER DIODE; Terminal Position: END; Terminal Form: WRAP AROUND; No. of Terminals: 2; Surface Mount: YES; Package Shape: ROUND;
BSS138BK,215
Nexperia
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Peak Reflow Temperature (C): 260; Additional Features: LOGIC LEVEL COMPATIBLE; Maximum Operating Temperature: 150 Cel;
NXP Semiconductors
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .83 W; JESD-609 Code: e3; Minimum DS Breakdown Voltage: 60 V;
1N4148WS
Rochester Electronics
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: FLAT; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
Inter F E T
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .2 W; Maximum Drain-Source On Resistance: 7.5 ohm; Maximum Drain Current (Abs) (ID): .115 A;
Yangzhou Yangjie Electronics
TRANS VOLTAGE SUPPRESSOR DIODE; Surface Mount: YES; Maximum Clamping Voltage: 29.2 V; Nominal Breakdown Voltage: 21.05 V; Maximum Repetitive Peak Reverse Voltage: 18 V; Polarity: BIDIRECTIONAL;
GTCA28-471M-R05
Littelfuse
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: INDUSTRIAL; Terminal Form: WIRE; No. of Terminals: 2; Package Shape: ROUND; Surface Mount: NO;
CG2250SNL
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: INDUSTRIAL; No. of Terminals: 2; No. of Functions: 1; Qualification: Not Qualified; Terminal Finish: TIN;
SMP2600SCMC
SMP2600SCMC by STMicroelectronics is a Telecom IC with surge protection circuit. It comes in a small outline package, 2 terminals, and C bend terminal form. Ideal for telecom applications requiring surface mount protection ICs with compact dimensions (W: 3.625mm, L: 4.325mm) and low seated height (2.65mm).
R.A.V-781LDEZ
Okaya Electric Industries
SURGE PROTECTION CIRCUIT;
CG5400LSTR
GAS DISCHARGE TUBE SUPPRESSOR;
B1101UA4
SURGE PROTECTION CIRCUIT; Temperature Grade: INDUSTRIAL; Terminal Form: GULL WING; No. of Terminals: 6; Package Code: SOP; Package Shape: RECTANGULAR;
CG5270MS
MAX22514AWA+
Maxim Integrated
SURGE PROTECTION CIRCUIT; Maximum Time At Peak Reflow Temperature (s): NOT SPECIFIED; Peak Reflow Temperature (C): NOT SPECIFIED;
B3204UA
B2200CC
SURGE PROTECTION CIRCUIT; Temperature Grade: INDUSTRIAL; Terminal Form: C BEND; No. of Terminals: 3; Package Code: SOC; Package Shape: RECTANGULAR;
CG2250MSTR
GAS DISCHARGE TUBE SUPPRESSOR; Terminal Form: NO LEAD; No. of Terminals: 2; Package Code: XSS; Package Shape: ROUND; Minimum Operating Temperature: -40 Cel;
CG7250MS
Littelfuse CG7250MS is a gas discharge tube suppressor for telecom applications. With a temperature range of -40 to 90°C, it's designed for industrial use and features surface mount with round package shape. The device has 2 terminals with tin finish, making it ideal for protecting telecom equipment from voltage surges.
B3164UA
B88069X8340B502
TDK
B88069X8340B502 by TDK is a gas discharge tube suppressor with 3 terminals. It operates in industrial temperature range of -40 to 90°C. Ideal for telecom applications, it provides protection against surges and voltage spikes.
CG90MSSNLSTR
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: INDUSTRIAL; No. of Terminals: 2; Qualification: Not Qualified; JESD-609 Code: e3; Terminal Finish: TIN;
CG75LSNLTR
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: INDUSTRIAL; No. of Terminals: 2; No. of Functions: 1; Terminal Finish: TIN; Qualification: Not Qualified;
GTCA26-551M-R05
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: INDUSTRIAL; Terminal Form: WIRE; No. of Terminals: 2; Package Shape: ROUND; Terminal Position: DUAL;
CG31.2
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: INDUSTRIAL; Terminal Form: UNSPECIFIED; No. of Terminals: 2; Package Shape: ROUND; Package Body Material: CERAMIC, METAL-SEALED COFIRED;
NTSP1
NTSP1 by STMicroelectronics is a surge protection circuit in a small outline package with 8 terminals. It features gull wing terminal form, tin lead finish, and measures 3.9mm in width and 4.9mm in length. Ideal for telecom applications requiring surface mount protection ICs with a rectangular package shape.
2036-60-SM-RPLF-H
Bourns
Bourns 2036-60-SM-RPLF-H is a telecom IC gas discharge tube suppressor with round surface mount package. It operates b/w -55°C to 125°C, withstands peak reflow temperature of 260°C for 30s. Ideal for telecom applications requiring protection against voltage surges.
Partstack™ will investigate all reported instances of potential suspect/counterfeit part listings.
2036-15-SM-RPLF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; Package Shape: UNSPECIFIED; Qualification: Not Qualified; Surface Mount: NO;
2036-09-SM-RPLF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; Package Shape: UNSPECIFIED; Minimum Operating Temperature: -55 Cel; Package Style (Meter): SPECIAL SHAPE;
2036-07-B2LF
Bourns 2036-07-B2LF is a telecom protection IC with gas discharge tube suppressor. It has 3 terminals, operates b/w -55°C to 85°C, and withstands peak reflow temperature of 260°C for up to 30 seconds. Ideal for safeguarding telecom equipment from voltage surges.
2036-42-SM-RP-LF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; Package Shape: UNSPECIFIED; JESD-609 Code: e3; Minimum Operating Temperature: -55 Cel;
2036-07-B3LF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: PIN/PEG; No. of Terminals: 3; Package Shape: ROUND; Moisture Sensitivity Level (MSL): 1;
2036-07-SM-RPLF
Bourns 2036-07-SM-RPLF is a Gas Discharge Tube Suppressor for Telecom applications. With a max operating temp of 85°C and min of -55°C, it has matte tin terminal finish. Its special shape package style and peak reflow temp of 260°C make it ideal for telecom protection ICs.
GAS DISCHARGE TUBE SUPPRESSOR; Terminal Form: NO LEAD; No. of Terminals: 3; Package Code: XSS; Package Shape: ROUND; JESD-30 Code: O-XXSS-N3;
2036-60-SM-RP-LF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; Package Shape: UNSPECIFIED; No. of Functions: 1; Maximum Operating Temperature: 85 Cel;
2036-15-SM-RPLF-H
GAS DISCHARGE TUBE SUPPRESSOR; Terminal Form: NO LEAD; No. of Terminals: 3; Package Code: XSS; Package Shape: ROUND; JESD-609 Code: e3;
2036-09-SM-LF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; Package Shape: UNSPECIFIED; Moisture Sensitivity Level (MSL): 1; Qualification: Not Qualified;
2036-07-SM-RP
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; No. of Terminals: 3; Package Shape: UNSPECIFIED; Qualification: Not Qualified;
2036-42-SM-RP
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; No. of Terminals: 3; Package Shape: UNSPECIFIED; Surface Mount: NO;
2036-09-BLF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: PIN/PEG; No. of Terminals: 3; Package Shape: ROUND; Terminal Finish: TIN;
2036-15-SM-LF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; Package Shape: UNSPECIFIED; Minimum Operating Temperature: -55 Cel; Package Body Material: UNSPECIFIED;
2036-35-SM
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; No. of Terminals: 3; Package Shape: UNSPECIFIED; JESD-30 Code: X-XXSS-X3;
2036-40-SM-RP-LF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; Package Shape: UNSPECIFIED; No. of Functions: 1; JESD-30 Code: X-XXSS-X;
2036-07-SM-LF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: UNSPECIFIED; Package Shape: UNSPECIFIED; Minimum Operating Temperature: -55 Cel; Maximum Time At Peak Reflow Temperature (s): 30;
2036-09-B3LF
GAS DISCHARGE TUBE SUPPRESSOR; Temperature Grade: OTHER; Terminal Form: PIN/PEG; No. of Terminals: 3; Package Shape: ROUND; Package Style (Meter): SPECIAL SHAPE;
2036-09-SM-LF-H
GAS DISCHARGE TUBE SUPPRESSOR; Terminal Form: NO LEAD; No. of Terminals: 3; Package Code: XSS; Package Shape: ROUND; Terminal Finish: MATTE TIN;
2036-15BF
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