Littelfuse HMOV Varistor – The First Varistor Series Designed to Operate at Temperatures Up to 125°C with 2500V Isolation Voltage
New silicone coating technology makes high temperature and high isolation voltage operation possible
The HMOV™ Varistor Series from Littelfuse can operate at ambient temperatures up to 125°C with 2500V 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 10kA (8/20µs), reliability confirmed by a 1000-cycle thermal shock test, and high (2500V) isolation voltage make it the highest performance radial-leaded varistor currently on the market.
Applications
- Industrial Automation Controls
- Solar Power Inverters
- Security Systems
- Fire Alarms and Smoke Detectors
- LED Lighting
- Base Transceiver Station (BTS) Power Supplies
- Harsh Environment/Outdoor Power Supplies
Features
- High operating temperature of 125ºC
- High isolation voltage of 2500V
- Thermal shock tested from -55ºC to +125ºC, 1000 cycles
- Meets UL 1449 and IEC 60950-1
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
Link to Datasheet
