The Siemens 5SY4650-8CV is a 3P+N miniature circuit breaker (MCB) with a D50 tripping characteristic and a rated short-circuit breaking capacity Icu of 15 kA at 400 V AC. The D50 curve (10–20× In magnetic trip) is sized for motor-starting or transformer inrush loads that would nuisance-trip a B or C curve; expect it on compressor, pump, or conveyor feeder circuits.
5SY4650-8CV MCB, Icu=15kA 400V 3P+N D50, Siemens
MPN5SY4650-8CV
Siemens 5SY4650-8CV, 3P+N miniature circuit breaker, D50 characteristic, Icu=15kA at 400V AC.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Product details
Frequently asked questions
What does Icu=15kA at 400V mean for this MCB?
It means the breaker can safely interrupt a short-circuit fault of up to 15,000 amperes at 400 V AC without failing. This rating governs its placement in a distribution board — it must be matched to the prospective fault current at its installation point.
Where can I buy 5SY4650-8CV?
This MCB is sourced to order against an RFQ through our independent distribution channel. Submit a request and we will confirm current availability and pricing for your required quantity.
MPN
5SY4650-8CV