The Siemens SENTRON 5SY5103-7CC is a 1-pole DC miniature circuit breaker rated 3 A with a C-curve trip characteristic, designed for 220 V DC systems and tested to a 10 kA breaking capacity per IEC 60947-2.
DC-rated MCB for control and auxiliary circuits
This is a dedicated DC breaker — the operating voltage is DC only, with a maximum of 250 V DC and a rated DC value of 220 V. The quick assembly system and any-position mounting make it straightforward to fit into existing layouts.
Physical fit and environmental specs
Dimensions: 76 mm depth, 18 mm width, 90 mm height, installation depth 70 mm. IP20 with connected conductors. Operating temperature range spans -40 °C to 75 °C, with derated humidity limits: max 95% RH at 55 °C, tapering to 35% RH at 75 °C.
Construction and compliance details
It is sealable, and the design is rated for mechanical engineering and industrial machine manufacture. Combined terminals at both top and bottom accept supply from either direction, though polarity must be observed (DC supply).