Littelfuse Inc

Varistors for High Temperature and High Surge - HMOV™ Series

Littlefuse's HMOV varistor series can operate at ambient temperatures up to 125°C

Image of Littlefuse's HMOV Varistor SeriesThe HMOV varistor series from Littelfuse can operate at ambient temperatures up to 125°C with 2500 V isolation voltage, an advance made possible through the use of a new silicone coating technology. Competitive epoxy-coated varistor designs are typically limited to maximum temperatures of just 85°C while similar phenolic coating designs have limited isolation voltages. This high operating temperature makes it possible to reduce end-product production costs by eliminating the need for an additional heat sink or potting process. The combination of high operating temperature, high surge current absorption of up to 10 kA (8/20 µs), reliability confirmed by a 1000-cycle thermal shock test, and high (2500 V) isolation voltage make it the highest performance radial-leaded varistor currently on the market.

Applications include industrial automation controls, solar power inverters, security systems, fire alarm and smoke detectors, smart meters, LED lighting base transceiver station (BTS) power supplies, and harsh environment/outdoor power supplies.

Video: HMOV Series - High Operating Temperature Varistors

Features
  • High operating temperature of 125ºC
  • High isolation voltage of 2500 V
  • Thermal shock tested from -55ºC to +125ºC, 1000 cycles
  • Meets UL 1449 and IEC 60950-1

Image of Littlefuse's HMOV Series Guide

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Benefits
  
  • Eliminates the need for an additional heat sink or potting process used to dissipate heat
  • Ideally suited for use in higher ambient temperature applications
  • Eliminates the need for the additional insulation material
  • Minimize PCB size by reducing space required between the varistor and other components
  • Offers enhanced reliability that can extend the lifetime of the end product
  • Enables end product worldwide compliance
  

HMOV Series

ImageManufacturer Part NumberDescriptionVaristor Voltage (Min)Varistor Voltage (Max)EnergyAvailable QuantityPriceView Details
VARISTOR 390V 3.5KA DISC 10MMV10H250PVARISTOR 390V 3.5KA DISC 10MM351 V429 V65J3348 - Immediate$0.50View Details
VARISTOR 430V 3.5KA DISC 10MMV10H275PVARISTOR 430V 3.5KA DISC 10MM387 V473 V70J1890 - Immediate$0.50View Details
VARISTOR 510V 6.5KA DISC 14MMV14H320PVARISTOR 510V 6.5KA DISC 14MM459 V561 V150J2097 - Immediate$0.71View Details
VARISTOR 430V 10KA DISC 20MMV20H275PVARISTOR 430V 10KA DISC 20MM387 V473 V260J17120 - Immediate$0.85View Details
VARISTOR 205V 10KA DISC 20MMV20H130PVARISTOR 205V 10KA DISC 20MM184.5 V225.5 V145J1033 - Immediate$0.89View Details
VARISTOR 680V 10KA DISC 20MMV20H420PVARISTOR 680V 10KA DISC 20MM612 V748 V330J957 - Immediate$0.89View Details
VARISTOR 510V 10KA DISC 20MMV20H320PL3T1VARISTOR 510V 10KA DISC 20MM459 V561 V320J336 - Immediate$1.12View Details
VARISTOR 22V 3KA DISC 14MMV14H14PVARISTOR 22V 3KA DISC 14MM19.8 V24.2 V10J1938 - Immediate$0.71View Details
VARISTOR 390V 10KA DISC 20MMV20H250PVARISTOR 390V 10KA DISC 20MM351 V429 V240J1120 - Immediate$0.89View Details
VARISTOR 470V 10KA DISC 20MMV20H300PVARISTOR 470V 10KA DISC 20MM423 V517 V290J890 - Immediate$0.89View Details
VARISTOR 910V 10KA DISC 20MMV20H550PVARISTOR 910V 10KA DISC 20MM819 V1.001 kV450J1076 - Immediate$1.06View Details
VARISTOR 820V 6.5KA DISC 14MMV14H510PVARISTOR 820V 6.5KA DISC 14MM738 V902 V205J1001 - Immediate$0.71View Details
Published: 2017-01-18