The Littelfuse KLSR Series uses KLSR012 for its 12A configuration. The manufacturer lists 600V AC / 250V DC service together with 200kA AC breaking performance. The economical single-element RK1 construction is extremely current-limiting and suited to non-inductive loads. Use the linked Littelfuse datasheet to confirm coordination, approvals and installation details.
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Part KLSR012 carries a 12A rating within the Littelfuse KLSR Series. For coordination, use the 600V AC / 250V DC voltage rating together with the published 200kA AC interruption. The economical single-element RK1 construction is extremely current-limiting and suited to non-inductive loads. For installation, the listed format is Class R; mounting is Cartridge / Clip, with ferrule / blade (amp-dependent) terminals. Published dimensions are 127.0mm length; 20.6mm max body diameter. Typical applications include Resistance Heaters, Lighting, Non-Inductive Loads, General Purpose. Check the official Littelfuse datasheet before final coordination.
USCC4I
30A · 600VAC / 600VDC
USCC4
30A · 600VAC / 600VDC
USCC3N
30A · 600VAC / 600VDC
USCC3IN
30A · 600VAC / 600VDC
USCC3I
30A · 600VAC / 600VDC
USCC3
30A · 600VAC / 600VDC
USCC2I
30A · 600VAC / 600VDC
USCC2
30A · 600VAC / 600VDC