Thermal fuse

Jon Lawson

Foremost Electronics announces the availability of Therm-O-Disc’s new G4 257C Microtemp Thermal Fuse which offers the highest holding temperature and highest open temperature available in the market.

MICROTEMP thermal fuses, from Therm-O-Disc, offer an accurate, reliable solution to the need for upper limit temperature protection against overheating by interrupting an electrical circuit when operating temperatures exceed the rated temperature of the thermal fuse.

The G4-series is rated for continuous operating currents up to 10 amps at 250 VAC.

The global agency recognition of the G4-series enables use in a wide range of applications including major and portable appliances including high speed blenders as well as personal care products such as high power irons, steamers and hair straighteners.

The hold Temperature (Th) of the MICROTEMP G4 257C has been increased to 220ºC to ensure applications with higher normal ambient temperature requirements will have added assurance of maintained operation for a minimum period of 168 hours without opening, as tested per IEC 60691.

Other key features include fully safety agency approved to UL, VDE, CSA and CCC and evaluation in laboratory conditions to maintain continuity for 1,000 hours at continuous thermal fuse body temperature of 220ºC.