Littelfuse Protection Relays

Littelfuse protection relays help ensure the safe operation of motors and equipment by monitoring for fault conditions and providing a protective response to prevent damage. Typically used in industrial automation, control panels, motor control centers, and OEM machinery requiring protection for motor and equipment faults. Littelfuse protection relays offer accurate detection and the latest in circuit protection knowledge from Littelfuse.

Littelfuse motor protection relays help prevent damage to a motor from electrical and thermal overload conditions by detecting fault conditions such as overload, phase loss, phase imbalance, locked-rotor and thermal overload. Littelfuse protection relays are used in a variety of applications including pumps, fans, conveyors, compressors and other rotating equipment used in manufacturing, water and wastewater, material handling and energy.

Littelfuse electronic and overload protection relays are designed to detect irregularities in current and voltage to protect motors and other equipment from damage. Littelfuse protection relays are available in compact form factors and provide features such as; DIN-rail or panel mounting, adjustable settings, and standards compliance to support integration into control panels and automation systems.

Found 78 items
Normally In Stock
Littelfuse 231-INSIDER-P 1-Phase Pumpsaverplus/230v/ Fo
Free U.S Ground shipping
$284.57
$237.14
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Littelfuse 111P Motor and Pump Protection - 115 Volt, Single Throw, Single Pole
Free U.S Ground shipping
$332.94
$277.45
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Littelfuse 77C Motor and Pump Protection - 100-240 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$621.77
$518.14
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Littelfuse 77C-KW/HP 1-Phase Power Monitor/ 100-240
Free U.S Ground shipping
$627.82
$523.18
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Littelfuse 77C-LR-KW/HP 1-Phase Power Monitor/ 100-240
Free U.S Ground shipping
$627.82
$523.18
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Littelfuse FPS-CTU-01-00 Fps Control Unit
Free U.S Ground shipping
$6929.05
$5774.21
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Littelfuse FPS-CTU-02-00 Fps Control Unit Devicenet
Free U.S Ground shipping
$8588.04
$7156.70
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Littelfuse FPS-CTU-04-00 Fps Control Unit Ethernet
Free U.S Ground shipping
$9409.02
$7840.85
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Littelfuse FPS-OPI-01-00 Fps Operator Interface
Free U.S Ground shipping
$2289.24
$1907.70
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Littelfuse FPU-32-00-00 Feeder Protection Unit
Free U.S Ground shipping
$5666.42
$4722.02
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Littelfuse FPU-32-01-00 Feeder Protection Unit W/ Rs-485
Free U.S Ground shipping
$6052.28
$5043.57
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Littelfuse FPU-32-02-00 Feeder Protection Unit W/ D-Net
Free U.S Ground shipping
$6109.61
$5091.34
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Littelfuse FPU-32-04-00 Feeder Protection Unit W/ Ethernet
Free U.S Ground shipping
$6166.93
$5139.11
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Littelfuse MP8000 Motor Overload Protection 8000
Free U.S Ground shipping
$1049.08
$874.23
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Littelfuse MPS-CTU-01-00 Mps Control Unit
Free U.S Ground shipping
$6797.06
$5664.22
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Littelfuse MPS-CTU-02-00 Mps Control Unit Devicenet
Free U.S Ground shipping
$8424.46
$7020.38
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Littelfuse MPS-CTU-04-00 Mps Control Unit Ethernet
Free U.S Ground shipping
$9229.80
$7691.50
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Littelfuse MPS-OPI-01-00 Mps Operator Interface
Free U.S Ground shipping
$2245.63
$1871.36
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Littelfuse MPU-32-00-00 Motor Protection Unit
Free U.S Ground shipping
$5558.48
$4632.07
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Littelfuse MPU-32-00-01 Motor Protection Unit 1a
Free U.S Ground shipping
$5575.86
$4646.55
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Littelfuse MPU-32-01-00 Motor Protection Unit Tia-485
Free U.S Ground shipping
$5937.01
$4947.51
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Littelfuse MPU-32-01-01 Motor Protection Unit 1a Tia-485
Free U.S Ground shipping
$5937.01
$4947.51
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Littelfuse MPU-32-02-00 Motor Protection Unit Devicenet
Free U.S Ground shipping
$5993.24
$4994.37
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Littelfuse MPU-32-02-01 Motor Protection Unit 1a Devicenet
Free U.S Ground shipping
$5993.24
$4994.37
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Littelfuse MPU-32-04-00 Motor Protection Unit Ethernet
Free U.S Ground shipping
$6049.46
$5041.22
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Littelfuse MPU-32-04-01 Motor Protection Unit 1a Ethernet
Free U.S Ground shipping
$6049.46
$5041.22
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Littelfuse MPU-32-SMK Mpu/Fpu Surface Mount Kit
Free U.S Ground shipping
$180.14
$150.12
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Littelfuse PGR-6100-120 Ground-Fault And Insulation Monitor 120v
Free U.S Ground shipping
$3056.06
$2546.72
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Littelfuse PGR-6100-240 Ground-Fault And Insulation Monitor 240v
Free U.S Ground shipping
$3056.06
$2546.72
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Littelfuse PPI-600V Relay Elec Hdwe Parallel Path Isolator
Free U.S Ground shipping
$7423.57
$6186.31
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Littelfuse SE-105 Ground Fault Ground-Check Monitor
Free U.S Ground shipping
$2036.90
$1697.42
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Littelfuse SE-105D Gf-Gc Monitor 120-VAC/Dc
Free U.S Ground shipping
$2782.13
$2318.44
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Littelfuse SE-105DL Gf-Gc Monitor 120 VAC/VDC Latching Gc
Free U.S Ground shipping
$3209.40
$2674.50
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Littelfuse SE-105E Gf-Gc Monitor C/W 1n5339b Term 240 VAC
Free U.S Ground shipping
$2036.90
$1697.42
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Littelfuse SE-105L Gf-Gc Monitor 120 VAC Latching Gc
Free U.S Ground shipping
$2467.49
$2056.24
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Littelfuse SE-107 Ground-Fault Ground-Check Mon
Free U.S Ground shipping
$2036.90
$1697.42
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Littelfuse SE-107D Gf-Gc Monitor Uvr 120 VAC/VDC Supply
Free U.S Ground shipping
$2782.13
$2318.44
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Littelfuse SE-107DL Gf-Gc Monitor Uvr Latching Gc 120 VAC/Dc
Free U.S Ground shipping
$3209.40
$2674.50
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Littelfuse SE-107E Gf-Gc Monitor Uvr 240 VAC Supply
Free U.S Ground shipping
$2036.90
$1697.42
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Littelfuse SE-107L Gf-Gc Monitor Latching Gc
Free U.S Ground shipping
$2467.49
$2056.24
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Littelfuse SE-134C-00 Ground-Fault Ground-Check Mon
Free U.S Ground shipping
$5623.36
$4686.13
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Littelfuse SE-134C-10 Gfgc Monitor Low Voltage
Free U.S Ground shipping
$6764.04
$5636.70
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Littelfuse SE-134C-XGC-00 Gf-Gc Mon, Ac/DC Supply, Ext-Gc
Free U.S Ground shipping
$6207.60
$5173.00

FAQs

What are Littelfuse protection relays used for in industrial applications?

Littelfuse protection relays are used in industrial applications to detect electrical and thermal faults and protect motors and equipment from damage. They are commonly installed in control panels, motor control centers, and OEM machinery to improve safety, reliability, and system uptime.

What types of protection relays does Littelfuse offer?

Littelfuse offers motor protection relays, overload protection relays, and electronic protection relays designed to protect motors from overload, phase loss, phase imbalance, locked-rotor conditions, and overheating in industrial automation systems.

How do Littelfuse motor protection relays protect motors?

Littelfuse motor protection relays protect motors by monitoring current and electrical conditions to detect overload and fault conditions. When abnormal operation is detected, the relay trips the circuit to prevent motor overheating, mechanical damage, and electrical failure.

Where are Littelfuse protection relays commonly used?

Littelfuse protection relays are commonly used in industrial control panels, motor control centers, OEM machinery, pumps, fans, conveyors, compressors, manufacturing equipment, and material handling systems requiring dependable motor protection.

Are Littelfuse protection relays suitable for control panels and motor starters?

Yes, Littelfuse protection relays are designed for control panels and motor starter applications. They feature compact designs, DIN-rail or panel mounting options, adjustable protection settings, and compatibility with industrial control voltages.

Why choose Littelfuse protection relays over other industrial brands?

Engineers choose Littelfuse protection relays for their accurate fault detection, robust construction, long service life, and strong heritage in circuit protection. Littelfuse solutions are trusted for reliable motor and equipment protection in demanding industrial environments.