Rating and application context
The Siemens 5SL4205-7CC is a 2-pole miniature circuit breaker rated at 400 V with a 10 kA breaking capacity, C-curve trip characteristic, and a 0.5 A rated current. The C-curve (5–10× In magnetic trip) suits it for protecting general-purpose circuits with moderate inrush — lighting banks, control transformers, or small motor starters where the starting surge stays under 10× the 0.5 A rating. The 10 kA interrupting capacity at 400 V means it can clear a bolted fault up to that level without upstream fuses needing to intervene, which simplifies selectivity coordination in a sub-distribution board. This unit belongs to the Siemens SENTRON 5SL4 Basic Devices family, designed for DIN-rail mounting in distribution boards and panel enclosures. The 2-pole form factor (one protected pole plus switched neutral, or two protected poles depending on wiring) occupies a standard 36 mm module width.
Lifecycle and sourcing posture
Note the Product class designation B: return restricted, please contact your Siemens partner/contact. This classification typically applies to items with controlled distribution — it does not indicate obsolescence, but means the part is not stocked for open counter sales and must be sourced through a Siemens partner or authorized distributor. For procurement purposes, this part is quoted to order against an RFQ; availability and current pricing are confirmed at quote time.
Regulatory compliance documentation
RoHS compliance is confirmed effective 01 June 2013, covering the substance restrictions per Directive 2011/65/EU. The REACH Article 33 declaration identifies lead (CAS 7439-92-1) above the 0.1% threshold in the candidate list — this is a standard disclosure for electrical components containing lead in solder joints or terminal plating; it does not restrict sale or installation under current exemptions. No UL or IEC certification numbers are listed in the available evidence; for tender submissions requiring third-party marks, request the manufacturer's declaration or certificate from the Siemens partner handling the order.