Rated 277 VAC with a 6 kA interrupting capacity, it protects semiconductor circuits and sensitive electronic loads.
Trip Curve Z — what it means for the circuit
Curve Z is the tightest magnetic-trip band in the S200 family, operating between 2× and 3× rated current (2–3 A for this 1 A unit). This makes it the correct choice for protecting control transformers, PLC power supplies, and analog I/O loops where a standard Curve C would allow fault current to persist long enough to cook the load.