Siemens 5SY7232-7 SENTRON MCB — 2-pole C-curve, 15/25 kA
It is rated for 400 V AC and carries a breaking capacity of 15 kA per EN 60898-1 and 25 kA per IEC 60947-2, with a DC rating of 15 kA at 60 V per IEC 60947-2. For UL 1077 / CSA C22.2 No. 235 applications, the interrupting rating is 5 kA.
The dual rating matters for panel design. The DC rating of 15 kA at 60 V covers control-circuit DC supplies common in industrial panels. The UL 1077 listing at 5 kA is the supplementary protector rating for North American panels — not a branch-circuit rating, but sufficient for most control-transformer and PLC supply protection. If you are coordinating with an upstream 25 kA-rated main breaker, this holds selectivity down to the sub-feed.
Snap-on mounting to DIN rail, any position. Depth is 76 mm (installation depth 70 mm), width 36 mm (2 MW), height 90 mm. Ambient range -40 °C to 75 °C, with humidity derating: max 95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C. Sealable terminals allow lockout/tagout. Combined top and bottom terminals simplify busbar or ring-tongue wiring.