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
KEYPAD SWITCH; Mounting Feature: SURFACE MOUNT-STRAIGHT; Switch Function: SPST; Solderability: REFLOW; JESD-609 Code: e4; Minimum Operating Temperature: -40 Cel;
Median Price
$0.325
Lifecycle Status
Suppliers In-Stock
20
In-Stock Inventory
1k+
Mouser Electronics
1+ parts
$0.750
100+ parts
$0.543
1k+ parts
$0.449
10k+ parts
$0.377
DigiKey
$0.760
$0.542
$0.418
TTI Europe
-
Future Electronics
Chip1Stop
$0.274
NEP Electronics
Newark
$0.505
PEI Genesis
Master Electronics
$0.323
Farnell
$0.361
Verical
Arrow
TME
$0.510
$0.391
$0.260
Ozdisan Elektronik
$0.722
IBS Electronics
$0.477
Pegasus Components GmbH
NAC Semi
$0.650
ComSIT Distribution GmbH
Prism Electronics
Bristol Electronics
Perfect Parts
Kepictronics
Assy Fe
GreenTree Electronics
Metaverse IC Inc.
Authorized Procurement Solutions
XScomponents
Keypad Switches KMR421GLFS attributes and parameters. Explore more Keypad Switches devices from C & K Components
Length (Actuator):
Actuator Travel (mm):
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Body Height:
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Maximum Contact Bounce Time:
Maximum DC Contact Current:
DC Maximum Power Rating R Load (Contact):
DC Maximum Rating R Load (Contact):
Contact Resistance:
Maximum DC Contact Voltage:
Dielectric Withstand Volts (V):
Electrical Life:
End Contact Material:
Insulation Resistance:
JESD-609 Code:
Mounting Feature:
No. of Switches:
Maximum Operating Force:
Maximum Operating Temperature:
Minimum Operating Temperature:
Packing Method:
Sealing:
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KMR421GLFS Switches trade compliance attributes, and parameters.
ECCN
EAR99
ECCN Governance
EAR
HTS
8536.50.90.40
SB
C&K is now a part of Littelfuse, Inc. Since its formation in 1928, C&K has been at the forefront of technological evolution in electromechanical switches. The company’s unmatched design capabilities tailored to customer needs are recognized globally by design engineers who demand high-quality switch performance. Nearly a century later, C&K remains one of the most recognizable and trusted names in the e-mech switch industry. C&K has headquarters in Waltham, Massachusetts (United States) and global design centers at its HQ location alongside Dole (France) and Huizhou (China). Used in automotive, industrial, medical and consumer products, among other applications, C&K products – including tactile, rocker and toggle switches – are assembled in over 55,000 standard products and 8.5 million switch combinations to companies that design, manufacture and distribute electronics products. So whether you’re interested in a universal paddle switch assembly for a fire alarm, a compact start/stop button for a boating application, a switching mechanism for a surgical device with a specific actuation force, or a tailor-made multi-position snap-switch module for temperature adjustment, you can count on C&K to deliver the best possible solution every time.
BSS138
Calogic
N-CHANNEL; Configuration: SINGLE; Surface Mount: YES; Maximum Power Dissipation (Abs): .36 W; Terminal Finish: Tin/Lead (Sn/Pb); Maximum Drain Current (Abs) (ID): .2 A;
DS18B20U+
Analog Devices
DS18B20U+ by Analog Devices is a 12-bit temperature sensor with 1-Wire interface. It operates b/w -55 to 125°C, offering ±0.5°C accuracy. Suitable for applications requiring digital output and surface mounting feature.
1N4148WS
Lite-on Semiconductor
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: GULL WING; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
Weitron Technology
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .225 W; Terminal Form: GULL WING; Terminal Position: DUAL;
SN65HVD230DR
Texas Instruments
SN65HVD230DR by Texas Instruments is a BICMOS technology interface circuit with 1Mbps data rate, suitable for industrial applications. It operates at 3.3V, has 8 terminals in a small outline package, and can withstand temperatures from -40 to 85°C.
2N2222A
Tesla Elektronicke Soucastky
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
M39029/58-360
Defense Logistics Agency
CONNECTOR ACCESSORY; Contact Type: CRIMP REAR RELEASE; Mating Contacts: M39029/56-348, M39029/57-354; Insertion Tool Sources: MILITARY; Contact Gender: MALE; Alternate Contact Sources: MILITARY;
OPA2227UA
OPA2227UA by Texas Instruments is a dual operational amplifier with low-offset voltage of 200 uV and bias current of 0.01 uA. It operates at temperatures ranging from -40 to 85 °C, making it suitable for industrial applications requiring precise signal amplification. With a unity gain bandwidth of 8000 kHz, this op amp is ideal for high-frequency circuit designs.
STM32H753ZIT6
STMicroelectronics
STM32H753ZIT6 by STMicroelectronics is a 32-bit microcontroller with Cortex-M7 CPU, offering 20-Ch 16-Bit ADC and 2-Ch 12-Bit DAC channels. With a clock frequency of up to 48 MHz, it is ideal for industrial applications requiring CAN, Ethernet, and USB connectivity. This microcontroller operates b/w -40°C to +85°C temperature range.
1N4148
Silicon Standard
RECTIFIER DIODE; Terminal Position: AXIAL; Terminal Form: WIRE; No. of Terminals: 2; Surface Mount: NO; Package Shape: ROUND;
Won-top Electronics
SMBJ18CA
Synsemi
TRANS VOLTAGE SUPPRESSOR DIODE; Terminal Position: DUAL; Terminal Form: C BEND; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
LM358MX
ROHM
OPERATIONAL AMPLIFIER; Temperature Grade: COMMERCIAL; Terminal Form: GULL WING; No. of Terminals: 8; Package Code: LSOP; Package Shape: RECTANGULAR;
Philips Semiconductors
N-CHANNEL; Configuration: SINGLE; Surface Mount: YES; Maximum Power Dissipation (Abs): .36 W; Operating Mode: ENHANCEMENT MODE; Maximum Operating Temperature: 150 Cel;
First Components International
TRANS VOLTAGE SUPPRESSOR DIODE; Surface Mount: YES; Maximum Clamping Voltage: 29.2 V; Nominal Breakdown Voltage: 21.1 V; Polarity: BIDIRECTIONAL; Maximum Repetitive Peak Reverse Voltage: 18 V;
Crimson Semiconductor
LM358N
LM358N by Texas Instruments is an operational amplifier with 2 functions, offering a max input offset voltage of 9000 uV and a nominal common mode reject ratio of 85 dB. Widely used in commercial applications, it operates at temperatures ranging from 0 to 70 °C and has a unity gain bandwidth of 1000 kHz.
LL4148
Changzhou Galaxy Century Microelectronics
RECTIFIER DIODE; Terminal Position: END; Terminal Form: WRAP AROUND; No. of Terminals: 2; Surface Mount: YES; Package Shape: ROUND;
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.
KSR251GLFS
Itt Cannon
KSR251GLFS by ITT Cannon is a keypad switch with a body width of 3.8 inch and sealing rating of IP50. It has an electrical life of 100000 cycles and is commonly used in applications requiring momentary switch action, such as surface mount straight mounting feature.
EVQP7C01K
Panasonic
The Panasonic EVQP7C01K is a SPST keypad switch with 100000 cycles electrical life, 2.9" width, and 1.35mm height. It operates b/w -20°C to 70°C, has a max contact voltage of 12VDC, and requires a max operating force of 2.2N. Ideal for applications requiring momentary switch action in surface mount-right angle configurations.
EVQQ2K02W
The Panasonic EVQQ2K02W is a SPST keypad switch with 1000000 cycles electrical life and 100000000 ohm insulation resistance. Ideal for applications requiring ON-OFF contact function, it operates b/w -40 to 85 °C with a max DC voltage of 15V.
B3U-1000P
Omron
Omron B3U-1000P Keypad Switch offers 200000 cycles Electrical Life, 100000000 ohm Insulation Resistance, and SPST Switch Function. Ideal for applications requiring a DUST PROOF sealed, MOMENTARY-TACTILE switch with 1.99N Max Operating Force.
B3U-3000PM-B
Omron's B3U-3000PM-B keypad switch features SPST function, 100000 cycle electrical life, and 1.59N max operating force. With IP40 sealing, it is ideal for applications requiring momentary-tactile switch action in a compact design.
DTSM-65N-V-T/R
Apem Components
The Apem Components DTSM-65N-V-T/R is a brown keypad switch with SPST function, 200000 cycle electrical life, and 2.06N max operating force. Ideal for surface mount applications requiring momentary-tactile switch action at temperatures ranging from -25°C to 70°C.
1241.1106.7097
Schurter Ag
Schurter Ag's 1241.1106.7097 keypad switch has a POLYSULFONE housing, SPST switch function, and IP65 sealing. With an electrical life of 1000000 cycles, it is ideal for panel mount applications requiring a momentary-tactile switch with a max DC contact voltage of 24V.
DTSA-62N-V
The Apem Components DTSA-62N-V is a SPST keypad switch with 200000 cycles electrical life. With a body width of 7.1882 inch and body height of 6.5532 mm, it is ideal for applications requiring momentary-tactile switch action. This through hole-right angle mounted switch has a max operating force of 2.06 N and operates at temperatures ranging from -25 to 70 °C, making it suitable for various electronic devices.
B3FS-1052P
Omron's B3FS-1052P keypad switch offers SPST switch function with 300000 cycles electrical life. With a max operating force of 1.96N, it is ideal for applications requiring momentary-tactile switch action. This surface mount device has a body width of 6in and operates b/w -25°C to 70°C temperatures.
EVQPC105K
The Panasonic EVQPC105K is a SPST Keypad Switch with 100000 cycles Electrical Life. It operates b/w -20 to 70°C, with a max DC Contact Voltage of 15V. Ideal for applications requiring a momentary switch action and through-hole-right angle mounting.
EVQP6YB55
The Panasonic EVQP6YB55 keypad switch has an electrical life of 500K cycles, SPST switch function, and dust-proof sealing. Ideal for applications requiring a momentary switch with a max operating force of 2.4N, such as consumer electronics or industrial control systems. Operating temperature range from -20°C to 70°C ensures reliable performance in various environments.
5GSH9358222
5GSH9358222 by Apem Components is a keypad switch with POLYPHENYLENE SULPHIDE housing, COPPER TIN ALLOY terminals, and RED/GREEN LED illumination. It has an electrical life of 10M cycles, IP67 sealing, and operates b/w -30 to 85 °C. Ideal for applications requiring a SPST switch with momentary-tactile action and surface mount-straight mounting feature.
EVQ11L09K
The Panasonic EVQ11L09K is a black keypad switch with 100000 cycles electrical life and 50000000 ohm insulation resistance. It has a 0.25mm actuator travel, SPST switch function, and operates b/w -20 to 70 °C. Ideal for applications requiring momentary switch action with low contact resistance and through-hole mounting.
RT1105AF160Q
E-switch
KEYPAD SWITCH;
PTS647SK50SMTR2LFS
C & K Components
PTS647SK50SMTR2LFS by C & K Components is a SPST Keypad Switch with 100000 cycles Electrical Life and 100M ohm Insulation Resistance. With a compact design of 4.5mm width and 2.9mm height, it's ideal for applications requiring momentary-tactile switch action in temperatures ranging from -20°C to 70°C.
KSL1M211LFTR
KSL1M211LFTR by C & K Components is a SPST keypad switch with 1000000 cycles electrical life and 1VA@32VDC DC max power rating. It has an IP60 sealing, -40 to 85 °C operating temperature range, and SILVER end contact material. Ideal for applications requiring a long hard plastic actuator type with 4 PCB hole count.
KMT011NGJLHS
KMT011NGJLHS by C & K Components is a SPST keypad switch with IP68 sealing, suitable for surface mount applications. It offers an electrical life of 300K cycles and a max DC contact voltage of 32V. With a compact body width of 2.6", it operates in temperatures ranging from -40 to 85°C, making it ideal for various industrial and outdoor electronic devices.
SKHUAME010
Alps Alpine
Alps Alpine SKHUAME010 is a RED SPST KEYPAD SWITCH with 100000 cycles Electrical Life. Featuring SHARP STEM Actuator, it has 2.55N Max Operating Force and -30 to 85°C Temperature Range. Ideal for applications requiring reliable tactile feedback in compact electronic devices.
CS11028.0F160J
Cit Relay & Switch
CS11028.0F160J by Cit Relay & Switch is a SPST Keypad Switch with SILVER plating, suitable for applications requiring 100000 cycles of Electrical Life. It features NYLON housing, BRASS terminals, and PHOSPHOR BRONZE contacts, offering an operating force of 1.57N and max DC contact voltage of 50V. Ideal for surface mount applications in various electronic devices.
MSLPT5252CL4WTR
TE Connectivity
TE Connectivity's MSLPT5252CL4WTR is a WHITE Keypad Switch with POLYETHYLENE housing. It operates b/w -25 to 70 °C, with SPST switch function and 0.05 A AC contact current. Ideal for PANEL MOUNT applications, it features SILVER plating on center contacts and STAINLESS STEEL end contacts.
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