Semiconductors
Passive Components
Sensors
Power
Optoelectronics
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Littelfuse offers innovative circuit protection solutions. Wherever one looks, Littelfuse is there. Streetlights, office buildings, cars, trucks, factories, computers, heating and cooling systems, electronic games, telecommunications equipment, even the satellites in the sky are protected by Littelfuse circuit protection products.
Littelfuse Product Lines
Semiconductors
Diodes & Rectifiers
- • Rectifiers - Arrays (105)
- • Rectifiers - Single (128)
- • Zener Diodes - Single (1)
Power Management ICs
Thyristors
- • DIACs, SIDACs (246)
- • SCRs (875)
- • SCRs - Modules (1)
- • TRIACs (1,365)
Transistors
- • FETs, MOSFETs - Single (5)
- • IGBTs - Modules (48)
- • IGBTs - Single (22)
Passive Components
Capacitors
- • Mica and PTFE Capacitors (1)
Filters
- • Common Mode Chokes (61)
Inductors, Coils, Chokes
- • Fixed Inductors (28)
Potentiometers, Variable Resistors
- • Rotary Potentiometers, Rheostats (17)
- • Scale Dials (6)
Resistors
- • Specialized Resistors (8)
Sensors
Specialized Sensors
- • Current Sensors (2)
- • Float, Level Sensors (100)
- • Flow Sensors (2)
- • Position Sensors - Angle, Linear Position Measuring (7)
- • Shock Sensors (7)
Temperature Sensors
- • NTC Thermistors (556)
- • PTC Thermistors (8)
- • RTD (Resistance Temperature Detector) (25)
- • Thermocouple, Temperature Probes (1)
- • Thermostats - Mechanical (37)
Magnetic Sensors
- • Position, Proximity, Speed (Modules) (3,028)
- • Magnets - Multi Purpose (13)
- • Magnets - Sensor Matched (18)
Power
Circuit Protection
- • Circuit Breakers (216)
- • Electrical, Specialty Fuses (4,830)
- • Fuseholders (2,190)
- • Fuses (11,333)
- • Gas Discharge Tube Arresters (GDT) (1,184)
- • Ground Fault Circuit Interrupter (GFCI) (16)
- • Inrush Current Limiters (ICL) (43)
- • Lighting Protection (140)
- • PTC Resettable Fuses (1,697)
- • TVS - Diodes (8,987)
- • TVS - Mixed Technology (302)
- • TVS - Thyristors (2,002)
- • TVS - Varistors, MOVs (7,464)
- • Thermal Cutoffs (Thermal Fuses) (2)
Switches
- • Disconnect Switch Components (30)
- • Keylock Switches (61)
- • Magnetic, Reed Switches (554)
- • Pushbutton Switches (128)
- • Rocker Switches (128)
- • Rotary Switches (1)
- • Selector Switches (63)
- • Snap Action, Limit Switches (25)
- • Toggle Switches (100)
Transformers
- • Current Sense Transformers (28)
Relays
- • Automotive Relays (9)
- • Power Relays, Over 2 Amps (61)
- • Reed Relays (114)
- • Relay Sockets (15)
- • Safety Relays (4)
- • Solid State Relays (15)