Siemens SENTRON 5SY7140-7 — 1-pole C-curve MCB for industrial branch circuits
Rated breaking capacity reaches 15 kA per EN 60898 and 20 kA per IEC 60947-2, with a DC rating of 15 kA at 60 V (max 72 V). UL 1077 listing holds 5 kA at 440 V for North American acceptance.
For DC circuits, the 15 kA at 60 V (72 V max) applies to battery-backed control supplies or DC bus protection — verify the system voltage stays within the 72 V ceiling. The UL 1077 supplementary-protector listing (5 kA at 440 V) means this breaker cannot serve as the sole branch-circuit OCPD in a UL 508A panel; it protects downstream loads after a listed branch fuse or circuit breaker.
Lifecycle and sourcing — active production, quoted to order
The 5SY7140-7 carries a current lifecycle status — no phase-out or last-time-buy notice on record.
Panel integration — DIN-rail fit, terminal detail, environmental limits
Operating temperature spans -40 °C to 75 °C, with humidity derating above 55 °C (95% RH to 55 °C, 55% to 70 °C, 35% to 75 °C).