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Siemens 5SU9404-1KK32 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SU9404-1KK32 SENTRON RCD Circuit Breaker, 32 A, 10

MPN5SU9404-1KK32

Siemens SENTRON 5SU9404-1KK32 RCD-operated circuit breaker, 32 A, 10 kA, C-curve, 1P+N, 18 mm wide.

Siemens 5SU9404-1KK32 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SU9404-1KK32 — Electrical Ratings
ParameterValue
Number of poles2
Overvoltage categoryIII
5SU9404-1KK32 — Identification
ParameterValue
Product designationRCD-operated circuit breaker
Product design / constructionInstantaneous
5SU9404-1KK32 — Mechanical
ParameterValue
Mounting positionany
Maximum0.75 W
Width18 mm
Height125 mm
Depth77 mm
Installation depth70 mm
5SU9404-1KK32 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors
5SU9404-1KK32 — Electrical
ParameterValue
Tripping Characteristic ClassC

Product details

The Siemens 5SU9404-1KK32 is a 1P+N RCD-operated circuit breaker from the SENTRON 5SU9 series, combining overcurrent and residual current protection in a single 18 mm wide unit. Rated 32 A at 30 °C with a C tripping characteristic and a 10 kA breaking capacity per EN 60898 and IEC 60947-2, it handles motor-start inrush and moderate fault currents in residential or light commercial panels.

Feed from top or bottom; no polarity restriction. IP20 with conductors connected, so it lives inside a distribution board, not exposed.

Rated 32 A at 30 °C ambient, but drops to 30.08 A at 40 °C, 29.12 A at 45 °C, 27.84 A at 50 °C, and 25.92 A at 55 °C.

Frequently asked questions

What is the breaking capacity of the 5SU9404-1KK32?

10 kA rated per EN 60898 and IEC 60947-2, which means it safely interrupts fault currents up to that level without upstream damage.

Where can I buy the 5SU9404-1KK32?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

Will the 5SU9404-1KK32 fit a panel designed for a 5SY3132-6?

Both are 18 mm wide, DIN-rail mounted, 1P+N, C-curve breakers with similar ratings, so the 5SU9404-1KK32 drops into the same panel footprint without rewiring. The 5SU9 series adds integrated RCD protection that the 5SY lacks, so verify the circuit's residual-current requirements before swapping.

MPN
5SU9404-1KK32