This is for 1 of the Ametherm SL32 1R030 

The Ametherm ICL - circuit protection thermistor, part# SL32 1R030 replaced SG379 (old part number) on the blower motor control board module (also SG405 or SG328), 1 OHm, 30 Amp ICL, CSA approved. 

This is a replacement for the old part number SG379 in the following HVAC systems:

Carrier

York

Trane XV90

Bryant

Lennox

"If you have one of the blower motor control modules like the sample photos is not working, most likely this SL32 thermistor has defected. You can try to replace this first to see if it will work for you; instead, replace the whole blower motor and the control board module unit; this unit will cost you over $2000 Canadian; I have replaced this thermistor and saved me $2K for it."

Inrush Current Limiter(ICL) is a cost-effective way of limiting the inrush of current that can damage components in a switching power supply and other devices when the equipment is turned on.

Ametherm SL32 1R030 (SG379, SG405 or SG328)

http://www.ametherm.com/datasheetspdf/SL321R030.pdf