Siemens 5SL3250-7CC, miniature circuit breaker, 400 V, 4.5 kA interrupting capacity, 2-pole, C-curve, 50 A.
The Siemens 5SL3250-7CC is a 2-pole miniature circuit breaker (MCB) rated for 400 V with a 4.5 kA interrupting capacity, C-trip curve, and 50 A current rating.
The 2-pole width occupies two modular units (36 mm) on the rail. Rated for use in Siemens ALPHA 6-series distribution boards and standard DIN-rail enclosures. The 50 A rating and C-curve suit it for feeder protection on motor circuits, lighting banks, and general-purpose loads where the upstream device coordinates within the 4.5 kA SCCR.
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.
The C-trip curve means the breaker trips at 5 to 10 times rated current (250–500 A for this 50 A unit). This is the standard choice for motor circuits, transformers, and lighting with moderate inrush — it avoids nuisance tripping on startup while still providing short-circuit protection.
The interrupting capacity is 4.5 kA at 400 V. This limits the breaker to panels where the prospective short-circuit current at the installation point does not exceed 4.5 kA. For higher fault-current locations, a higher-rated MCB or upstream current-limiting device is needed.
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