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.
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KLB4 by Littelfuse is a 4A fast blow electric fuse with 250V AC/DC rated voltage, ideal for inline mounting. With dimensions of 14.3mm x 50.8mm and high breaking capacity of 200kA, it meets CSA and UL standards for reliable circuit protection in various applications.
Median Price
$1.390
Lifecycle Status
Suppliers In-Stock
11
In-Stock Inventory
1k+
Bürklin Elektronik
1+ parts
100+ parts
$1.100
1k+ parts
$0.950
10k+ parts
-
Distrelec
Nova Conductors
$1.682
Rapid Electronics
$2.033
$1.830
Vyrian
LIBRA Elektronik GmbH
Manotoh
ComSIT Distribution GmbH
ACDS - Activité Composants Distribution Service
Holdelec - ElecDif-Pro
Quittner & Schimek s.r.o.
Aranea Global
$1.648
$1.582
Continental Prestige Electronics
Argo Parts USA
Allen Electronics Distributors
$1.790
$1.530
Aztec Data Supply Inc.
$19.130
Standard Data Resources (Excess)
Cyclops Electronics Ltd (Excess)
The high AC voltage rating of 250V makes this fuse suitable for a variety of electrical applications where a reliable fuse protection is required.
The compact size of 14.3mm ensures easy installation in tight spaces without compromising on performance.
The end cap terminal shape allows for secure and stable connection, ensuring proper functioning of the fuse in the circuit.
The dimensions of 14.3mm x 50.8mm provide a standard size for easy replacement and compatibility with a wide range of fuse holders.
With a rated current of 4A, this fuse can effectively protect against overcurrent and short circuit situations in various electrical systems.
The fast blow characteristic ensures quick response to overcurrent conditions, providing reliable protection to the connected equipment.
This electric fuse type offers a high level of circuit protection, safeguarding against electrical faults and ensuring the safety of the overall system.
The high breaking capacity of 200,000A makes this fuse suitable for handling high fault currents, ensuring efficient protection and reliability.
With a rated DC voltage of 250V, this fuse is suitable for DC applications where a durable and reliable fuse protection is required.
The versatile mounting feature allows for easy installation in various configurations, providing flexibility and convenience in different setups.
Compliant with industry standards such as CSA and UL, this fuse ensures high quality and reliability, making it a trustworthy choice for electrical protection needs.
Fuses KLB4 attributes and parameters. Explore more Fuses devices from Littelfuse
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Rated AC Voltage:
Rated DC Voltage:
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Dimensions:
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KLB4 Circuit Protection trade compliance attributes, and parameters.
ECCN
EAR99
ECCN Governance
EAR
NSN
5920-00-116-2777, 5920001162777
NIIN
001162777
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.
LM358AN
Philips Semiconductors
OPERATIONAL AMPLIFIER; Temperature Grade: COMMERCIAL; Terminal Form: THROUGH-HOLE; No. of Terminals: 8; Package Code: DIP; Package Shape: RECTANGULAR;
2N7002
Onsemi
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): .2 W; Terminal Finish: Matte Tin (Sn) - annealed; Transistor Element Material: SILICON;
BAV99
Temic Semiconductors
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: GULL WING; No. of Terminals: 3; Surface Mount: YES; Package Shape: RECTANGULAR;
OHN3140U
Optek Technology
MAGNETIC FIELD SENSOR,HALL EFFECT; Mounting Feature: THROUGH HOLE MOUNT; No. of Terminals: 3; Output Type: ANALOG CURRENT; Package Shape or Style: RECTANGULAR; Output Range: 25mA;
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;
BSS138
Panjit International
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Drain-Source On Resistance: 3 ohm; Minimum DS Breakdown Voltage: 50 V; Terminal Form: GULL WING;
Itt Semiconductor
N-CHANNEL; Configuration: SINGLE; Surface Mount: YES; Package Body Material: PLASTIC/EPOXY; Field Effect Transistor Technology: METAL-OXIDE SEMICONDUCTOR; Package Shape: RECTANGULAR;
1N4148WSF-7
Diodes Incorporated
1N4148WSF-7 by Diodes Inc. is a single silicon rectifier diode with max output current of 0.25A and max reverse voltage of 100V. It operates b/w -55 to 150°C, has a small outline package style, and is suitable for surface mount applications in various electronic circuits.
SMBJ18CA
Concord Semiconductor
TRANS VOLTAGE SUPPRESSOR DIODE; Surface Mount: YES; Maximum Repetitive Peak Reverse Voltage: 18 V; Nominal Breakdown Voltage: 21.05 V; Polarity: BIDIRECTIONAL; Maximum Clamping Voltage: 29.2 V;
FT232RL-REEL
FTDI
FTDI's FT232RL-REEL is a bus controller with 28 terminals, operating at 3.3V to 5.25V. It supports USB, VBUS, and UART buses with a data transfer rate of 60MBps. Ideal for industrial applications due to its CMOS technology and compatibility with RS232, RS422, and RS485 standards.
BSS138BKW,115
NXP Semiconductors
NXP Semiconductors' BSS138BKW,115 is a N-CHANNEL FET with 60V DS breakdown voltage and 0.32A ID. Ideal for SWITCHING applications, it features a built-in diode, 1.6 ohm RDS(on), and operates in ENHANCEMENT MODE. Suitable for surface mount with GULL WING terminals, it meets AEC-Q101 standards.
Yangzhou Yangjie Electronics
N-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; No. of Elements: 1; Terminal Form: GULL WING; Maximum Drain Current (ID): .34 A;
LM555CN
Intersil
PULSE; RECTANGULAR; Temperature Grade: COMMERCIAL; No. of Terminals: 8; Package Code: DIP; Package Shape: RECTANGULAR; Surface Mount: NO;
FDC5614P
MSKSEMI SEMICONDUCTOR
P-CHANNEL; Configuration: SINGLE WITH BUILT-IN DIODE; Surface Mount: YES; Maximum Power Dissipation (Abs): 2 W; Transistor Element Material: SILICON; Minimum DS Breakdown Voltage: 60 V;
LM317T
Samsung
ADJUSTABLE POSITIVE SINGLE OUTPUT STANDARD REGULATOR; No. of Terminals: 3; Terminal Form: THROUGH-HOLE; Maximum Load Regulation (%): 1.5 %; Operating Temperature (TJ-Min): 0 Cel; Maximum Line Regulation (%/V): .07;
Vishay Sprague
1N4148WT
Formosa Microsemi
RECTIFIER DIODE; Terminal Position: DUAL; Terminal Form: FLAT; No. of Terminals: 2; Surface Mount: YES; Package Shape: RECTANGULAR;
2N2222A
North American Philips Discrete Products Div
NPN; Configuration: SINGLE; Surface Mount: NO; Nominal Transition Frequency (fT): 300 MHz; Maximum Power Dissipation (Abs): .5 W; Maximum Collector Current (IC): .8 A;
OPA2277UA
Burr-Brown Corporation
OPERATIONAL AMPLIFIER; Temperature Grade: INDUSTRIAL; Terminal Form: GULL WING; No. of Terminals: 8; Package Code: SOP; Package Shape: RECTANGULAR;
Daco Semiconductor
170E3933
Eaton Corporation
The Eaton Corporation 170E3933 fuse is a 100A electric fuse with a rated breaking capacity of 60000A and rated DC voltage of 4000V. With dimensions of 365x57x70mm, it features TAB/BLADE terminals and can be mounted INLINE/HOLDER. Ideal for high-current circuit protection in industrial applications.
FNQ-R-1-3/10
Cooper Industries
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 600 V; Rated Current: 1.3 A; Terminal Shape: END CAP; Packing Method: BOX;
BK-AGC-10-R
The Eaton BK-AGC-10-R fuse, rated at 10A and 250V, with dimensions of 6.3x32mm, is a fast blow electric fuse suitable for circuit protection in various applications. It has a nominal joule integral of 486J and a rated breaking capacity of 200A, meeting CSA and UL standards. The fuse operates b/w -55°C to 125°C temperature range with pre-arcing rating of 0.492 A2/s.
FWX-35A
FWX-35A by Eaton Corporation is a 35A electric fuse with 50J nominal joule integral and 200kA rated breaking capacity. Measuring 20.57mm x 40.39mm, it has a rated AC/DC voltage of 250V and is suitable for inline mounting applications in CE, CSA, and UL standards-compliant circuits.
KTK-R-1
Cooper Electronic Technologies
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 600 V; Rated Current: 1 A; Terminal Shape: END CAP; Blow Characteristic: FAST;
0451.500MRL
Littelfuse
Littelfuse 0451.500MRL Nano fuse with 0.5A current rating, 125V DC/AC voltage, and 50A breaking capacity. Ideal for circuit protection in electronics due to very fast blow characteristic and compact dimensions of 6.1mm x 2.69mm x 2.69mm for surface mount applications. Reference standards include CSA, CUL, and UL certifications.
ATDR4
Mersen S A
Mersen S A's ATDR4 fuse, rated 4A and 600V AC/300V DC, features time delay blow characteristic. With dimensions of 10.4mm x 38.1mm and end cap terminal shape, it offers circuit protection with a high breaking capacity of 200kA. Ideal for inline mounting in various applications meeting CSA and UL standards.
0287030.PXCN
0287030.PXCN by Littelfuse is a 30A electric fuse with a rated breaking capacity of 1000A. It has a trip time of 0.08s and can handle a max operating temperature of 125°C. This fuse is commonly used for circuit protection in various applications.
FNQ-R-2-1/2
Eaton Corporation's FNQ-R-2-1/2 fuse, rated at 2.5A and 600V, features a time delay blow characteristic. With a body length of 10.3mm and diameter of 38.1mm, it is suitable for circuit protection in applications requiring an electric fuse with a rated breaking capacity of 200000A.
0453003.MR
Littelfuse 0453003.MR fuse, rated at 125V and 3A, offers very fast blow characteristic with a trip time of 5s. Nano-sized with dimensions of 6.1mm x 2.69mm x 2.69mm, it is ideal for circuit protection in applications requiring surface mounting method and wraparound terminal shape.
25ET
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 690 V; Rated DC Voltage: 350 V; Rated Current: 25 A; Terminal Shape: TAB/BLADE;
FNQ-R-30
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 600 V; Rated DC Voltage: 300 V; Rated Current: 30 A; Terminal Shape: END CAP;
0458007.DR
0458007.DR by Littelfuse is a NANO fuse with 7A rated current, 63V DC voltage, and 20.48J nominal joule integral. It is used for circuit protection in applications requiring a trip time of 5s, such as automotive electronics and industrial equipment.
LP-CC-3
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 600 V; Rated DC Voltage: 300 V; Rated Current: 3 A; Terminal Shape: END CAP;
JTD1.25ID
Littelfuse JTD1.25ID fuse, rated 1.25A with time delay blow characteristic, suitable for electric circuit protection at 600V AC and 300V DC. Features indicator and high breaking capacity of 200kA. Commonly used in inline/holder mounting applications.
0287002.PXCN
Littelfuse 0287002.PXCN fuse has a Nominal Joule Integral of 1.4 J and Trip Time of 0.02s, with dimensions 19.1mm x 5.1mm x 12.3mm. Rated for 2A current, it's used in circuit protection applications with rated breaking capacity of 1000A at max operating temp of 125°C and min temp -40°C.
LPJ-125SP
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 600 V; Rated DC Voltage: 300 V; Rated Current: 125 A; Terminal Shape: TAB/BLADE;
FNQ-12
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 500 V; Rated Current: 12 A; Terminal Shape: END CAP; Dimensions: 10.3mm x 38.1mm;
KTK-1/2
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 500 V; Rated DC Voltage: 500 V; Rated Current: .5 A; Terminal Shape: END CAP;
0216001.MXP
Littelfuse 0216001.MXP fuse, rated at 1A and 250V, offers fast blow characteristic with trip time of 0.02s. Ideal for circuit protection in applications requiring a compact 5x20mm size fuse with nickel terminal finish. Operating temperature range from -55 to 125°C ensures reliable performance in various environments.
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KLB40
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 250 V; Rated DC Voltage: 250 V; Rated Current: 40 A; Terminal Shape: TAB/BLADE;
KLB400
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 250 V; Rated DC Voltage: 200 V; Rated Current: 400 A; Terminal Shape: TAB/BLADE;
KLB45
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 250 V; Rated DC Voltage: 250 V; Rated Current: 45 A; Terminal Shape: TAB/BLADE;
KLB450
ELECTRIC FUSE; Mounting Feature: INLINE/HOLDER; Rated AC Voltage: 250 V; Rated DC Voltage: 200 V; Rated Current: 450 A; Terminal Shape: TAB/BLADE;
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