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SMOV Series Varistor Integrated Thermal Disconnect UL1449 (3rd Edition)

Littelfuse's SMOV consists of a 25 mm square or 34 mm square varistor with an integrated thermal disconnect


Littelfuse's SMOV consists of a 25 mm square or 34 mm square varistor with an integrated thermal disconnect, designed to open in the event of overheating due to abnormal overvoltage as outlined in UL1449 (3rd edition). The device possesses a separate micro-switch that can be used to indicate when the MOV is disconnected from the circuit.

The SMOV helps the SPD module to meet UL1449 and offers a quick thermal response, due to the close proximity of the integrated thermal element to the MOV body. In addition, the SMOV Series is designed to disconnect itself from the circuit safely in a sustained overvoltage, limited-current condition as outlined in UL1449 (3rd edition).
Littelfuse's SMOV Series Varistor Integrated Thermal Disconnect

Features
  • High-peak surge current handling capability and high energy-absorption capability
  • Included micro-switch can be used to indicate when the MOV is disconnected from the circuit
  • Compact MOV and switch design
  • Provides high-peak surge current rating (up to 40kA)
  • Helps customers meet requirements for UL1449 (3rd Edition) for Type 1 or Type 2 SPDs

Applications
  • Surge Protection Devices
  • AC Panel Protection Modules
  • Power Transfer Switches
  • AC/DC Power Distribution Systems
  • Photovoltaic Systems
  • Cell Phone Base Stations

Digi-Key P/N Manufacturer P/N Description  
F5836-ND SMOV25S111NP VARISTOR THERMAL 115VRMS 25MM Datasheet
F5838-ND SMOV25S151NP VARISTOR THERMAL 150VRMS 25MM
F5842-ND SMOV25S271NP VARISTOR THERMAL 275VRMS 25MM
F5845-ND SMOV25S321MP VARISTOR THERM 320VRMS ISO 25MM
F5849-ND SMOV25S511NP VARISTOR THERMAL 510VRMS 25MM
F5853-ND SMOV34S131NP VARISTOR THERMAL 130VRMS 34MM Datasheet
F5856-ND SMOV34S251NP VARISTOR THERMAL 250VRMS 34MM
F5859-ND SMOV34S301MP VARISTOR THERMAL 300VRMS 34MM
F5863-ND SMOV34S421NP VARISTOR THERMAL 420VRMS 34MM
F5867-ND SMOV34S751NP VARISTOR THERMAL 750VRMS 34MM