CF/CFM Carbon FIlm Resistors Stackpole Electronics CF/CFM Carbon Film Resistors are general-purpose resistors ideal for commercial and industrial applications. These resistors are auto sequencing and insertion compatible, have flame-retardant coverings, and offer a copper-plated steel lead wire with 100% tin over plate. CFM resistors feature a more compact design that makes them ideal for when size constraints apply. Stackpole Electronics CF/CFM Carbon Film Resistors are REACH compliant, halogen free, and operate in a temperature range of -55°C to +155°C.