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
MLRR-4-27-33 by Littelfuse is a hermetically sealed SPST dry reed switch with max pull in of 33 AT and min pull in of 27 AT. It operates b/w -40 to 125 °C, suitable for applications requiring reliable switching at up to 0.7A@140VAC or 1A@200VDC.
Median Price
$1.690
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Mouser Electronics
1+ parts
$1.680
100+ parts
$1.120
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$0.895
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$0.794
DigiKey
$1.700
$1.117
$0.898
$0.795
Q Components
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Perfect Parts
Provides strong magnetic attraction for reliable switch activation.
Ensures consistent and accurate switch operation.
Offers protection against environmental contaminants, increasing durability and longevity.
Simple and reliable single-pole, single-throw design for basic on/off functionality.
Compact size allows for easy installation in various applications.
Can withstand high temperatures, making it suitable for a wide range of operating environments.
Suitable for low to moderate current applications.
Capable of functioning in extreme cold conditions.
Optimal frequency response for reliable performance.
Handles high DC voltages for versatile use.
Offers precise and repeatable switching action.
Meets industry standards for AC load ratings.
Convenient bulk packaging for cost-effective purchasing.
Compact design for space-constrained applications.
Can handle higher DC current loads.
Sufficient current handling capability for various applications.
Secure solder termination for reliable electrical connections.
Meets voltage requirements for standard AC applications.
Easy installation with straight-through mounting for efficient assembly.
Magnetic Reed Switches MLRR-4-27-33 attributes and parameters. Explore more Magnetic Reed Switches devices from Littelfuse
Body Height:
Body Length/Diameter:
AC Maximum Rating R Load (Contact):
Maximum AC Contact Current:
Maximum DC Contact Current:
DC Maximum Rating R Load (Contact):
Maximum AC Contact Voltage:
Maximum DC Contact Voltage:
Mounting Feature:
Maximum Operating Temperature:
Minimum Operating Temperature:
Packing Method:
Maximum Pull In:
Minimum Pull In:
Nominal Resonant Frequency:
Sealing:
Switch Function:
Switch Type:
Termination Type:
MLRR-4-27-33 Switches trade compliance attributes, and parameters.
ECCN
EAR99
ECCN Governance
EAR
HTS
8536.50.70.00
SB
PCN Design/Specification - Reed Switch Box Logo Change 23/Sep/2015
PCN Packaging - Multiple Series Packaging 26/Aug/2020
Littelfuse is a diversified industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 20 countries, and with approximately 18,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation, and electronics end markets—everywhere, every day. Headquartered in Chicago, Illinois, United States, Littelfuse was founded in 1927.
ATMEGA328P-AU
Microchip Technology
ATMEGA328P-AU by Microchip: 8-bit RISC CPU, 20 MHz clock, 23 I/O lines. Ideal for industrial applications with SPI, TWI, USART connectivity and low power mode. Features include 2048 RAM bytes, 1024 EEPROM size, and 16384 ROM words.
2N7002
Taitron Components
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Operating Mode: ENHANCEMENT MODE; Minimum DS Breakdown Voltage: 60 V; Package Shape: RECTANGULAR;
M39029/56-351
Itt Cannon
CONNECTOR ACCESSORY; MIL Conformity: YES; Terminal Type: WIRE; IEC Conformity: NO; Alternate Contact Sources: ITT CANNON; Associated Military - Specifications: MIL-C-38999;
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;
LM358AN
Onsemi
OPERATIONAL AMPLIFIER; Temperature Grade: COMMERCIAL; Terminal Form: THROUGH-HOLE; No. of Terminals: 8; Package Code: DIP; Package Shape: RECTANGULAR;
1N4148
Shandong Yiguang Electronic Joint Stock
RECTIFIER DIODE; Terminal Position: AXIAL; Terminal Form: WIRE; No. of Terminals: 2; Surface Mount: NO; Package Shape: ROUND;
U.FL-R-SMT-1(10)
Hirose Electric
U.FL-R-SMT-1(10) by Hirose Electric is a RF connector with 50 ohm impedance, 0.05 dB insertion loss, and 8 GHz operating frequency. Ideal for board mounting in commercial applications, it features gold termination finish, liquid crystal polymer insulator, and 200VAC dielectric voltage resistance.
BSS138
General Semiconductor
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .35 W; Minimum DS Breakdown Voltage: 50 V; Qualification: Not Qualified;
BSS138DW-7-F
Diodes Incorporated
BSS138DW-7-F by Diodes Incorporated is a N-channel small signal FET with a min DS breakdown voltage of 50V. It is used for switching applications and operates in enhancement mode. This surface mount transistor has a max drain current of 0.2A and a max power dissipation of 0.2W.
Eic Semiconductor
FDV303N
FDV303N by Onsemi is a N-CHANNEL FET with 25V DS Breakdown Voltage, 0.68A Drain Current, and 0.45 ohm On Resistance. Ideal for SWITCHING applications, it operates in ENHANCEMENT MODE at temperatures ranging from -55 to 150°C. Package style is SMALL OUTLINE with GULL WING terminals for surface mount assembly.
Laube Technology
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
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.
LM107H/883
Linear Technology
OPERATIONAL AMPLIFIER; Temperature Grade: MILITARY; Terminal Form: WIRE; No. of Terminals: 8; Package Shape: ROUND; Technology: BIPOLAR;
LM2931AZ-5.0G
LM2931AZ-5.0G by Onsemi is a fixed positive single output LDO regulator with a nominal output voltage of 5V and max output current of 0.1A. It has a max dropout voltage of 0.6V, making it suitable for applications requiring stable power supply in temperature-sensitive environments up to 125°C. The package style is cylindrical with wire terminals, ideal for rail packing methods in various electronic devices.
BSS84-7-F
Diodes Inc. BSS84-7-F is a P-channel FET with 50V DS breakdown voltage, 0.13A max drain current, and 10 ohm RDS(on). Ideal for switching applications, it features a single configuration with built-in diode in a small outline package. Operating in enhancement mode at up to 150°C, it has Gull Wing terminals and matte tin finish.
Micro Commercial Components
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .36 W; Package Shape: RECTANGULAR; Terminal Position: DUAL;
AT90CAN128-16AU
Atmel
MICROCONTROLLER, RISC; Temperature Grade: INDUSTRIAL; Terminal Form: GULL WING; No. of Terminals: 64; Package Code: TQFP; Package Shape: SQUARE;
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;
RI80SMDM-0510-G1
Comus International
Reed Switches;
MARR-5-22-28AT
Littelfuse
DRY REED SWITCH; Manufacturer Series: MARR-5;
MVSR-20-32-38
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Additional Features: STANDARDS: CUL; UL; Maximum DC Contact Current: .5 A; Body Height: 19.69 mm;
DRS-50-62-68
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; AC Maximum Rating R Load (Contact): 2.1A@280VAC; Maximum Operating Temperature: 125 Cel; Sealing: HERMETICALLY SEALED;
MISM-7B515-20
DRY REED SWITCH; Mounting Feature: SURFACE MOUNT-STRAIGHT; Switch Function: SPST; Maximum Pull In: 20 AT; Body Length/Diameter: 1.8 mm; Termination Type: SOLDER;
KSK-1C90F-2025
Standex-meder Electronics
KSK-1C90F-2025 by Standex-Meder Electronics is a SPDT magnetic reed switch with 25 AT max pull in and 20 AT min pull in. With a body height of 14 mm, it operates b/w -40 to 130 °C and can handle 0.5A@175VAC/DC. Ideal for applications requiring reliable switching in various environments.
MRPR-20-27-38
Littelfuse MRPR-20-27-38 is a hermetically sealed SPST dry reed switch with 27 AT min and 38 AT max pull-in. Operating temperature ranges from -20 to 125 °C, making it ideal for applications requiring reliable switching at up to 1.5A@250VDC or 1.1A@265VAC loads.
DRR-129-62-73AT
DRY REED SWITCH; Manufacturer Series: DRR-129;
DRS-DTH-70-80
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPDT; Nominal Resonant Frequency: 2.75 kHz; Termination Type: SOLDER; Body Length/Diameter: 5.54 mm;
MDRR-DT-25-35-U
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: CHANGE-OVER; Maximum Pull In: 35 AT; Maximum DC Contact Voltage: 175 V; Maximum DC Contact Current: .25 A;
2119401015
Meder Electronic Ag
Meder Electronic Ag's 2119401015 is a SPDT magnetic reed switch with max pull in of 15 AT and min pull in of 10 AT. With a body height of 14 mm, it operates b/w -40 to 130 °C, handling 0.5A@175VAC/DC loads. Ideal for applications requiring reliable switching in various environments.
MARR-5-22-33AT
DRS-50-47-53
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Minimum Operating Temperature: -40 Cel; Maximum Operating Temperature: 125 Cel; Sealing: HERMETICALLY SEALED;
MLSM-3R27-38
DRY REED SWITCH; Mounting Feature: SURFACE MOUNT-STRAIGHT; Switch Function: SPST; Maximum AC Contact Current: .7 A; Packing Method: TR; Minimum Pull In: 27 AT;
59166-1-U-00-C
DRY REED SWITCH; Mounting Feature: SURFACE MOUNT-STRAIGHT; Switch Function: SPST; Maximum AC Contact Voltage: 140 V; Termination Type: SOLDER; Maximum Pull In: 25 AT;
MARR-5
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Termination Type: SOLDER; Nominal Resonant Frequency: 3.2 kHz; Sealing: HERMETICALLY SEALED;
MDSM-10
DRY REED SWITCH; Mounting Feature: SURFACE MOUNT-RIGHT ANGLE; Switch Function: SPST; Maximum Pull In: 25 AT; Maximum DC Contact Current: .5 A; Minimum Pull In: 10 AT;
MRPR-20-22-33
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Maximum AC Contact Current: 1.1 A; Minimum Pull In: 22 AT; Body Height: 20.32 mm;
DRR-129-47-53AT
59165-1-S-00-C
DRY REED SWITCH;
Partstack™ will investigate all reported instances of potential suspect/counterfeit part listings.
MLRR-3
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Minimum Pull In: 17 AT; Maximum DC Contact Current: 1 A; Body Height: 15.24 mm;
MLRR-4
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Minimum Operating Temperature: -40 Cel; Termination Type: SOLDER; Maximum DC Contact Current: 1 A;
MLRR-4-17-23
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Body Height: 15.24 mm; Maximum Pull In: 23 AT; Maximum DC Contact Current: 1 A;
MLRR-4-17-28
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Maximum Pull In: 28 AT; AC Maximum Rating R Load (Contact): .7A@140VAC; Maximum DC Contact Voltage: 200 V;
MLRR-4-22-28
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Body Length/Diameter: 2.66 mm; Maximum DC Contact Current: 1 A; Minimum Operating Temperature: -40 Cel;
MLRR-4-22-33
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Nominal Resonant Frequency: 6.25 kHz; AC Maximum Rating R Load (Contact): .7A@140VAC; Body Length/Diameter: 2.66 mm;
MLRR-4-27-38
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Maximum AC Contact Current: .7 A; Maximum AC Contact Voltage: 140 V; Maximum DC Contact Voltage: 200 V;
MLRR-4-32-38
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Sealing: HERMETICALLY SEALED; AC Maximum Rating R Load (Contact): .7A@140VAC; Termination Type: SOLDER;
Hamlin Electronics Europe
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Manufacturer Series: MLRR-3; Sealing: HERMETICALLY SEALED; Minimum Operating Temperature: -40 Cel;
DRY REED SWITCH; Mounting Feature: THROUGH HOLE-STRAIGHT; Switch Function: SPST; Minimum Operating Temperature: -40 Cel; Termination Type: SOLDER; Maximum Operating Temperature: 125 Cel;
Supply Digital Components
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