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Siemens 5SU9304-1KK40 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SU9304-1KK40 SENTRON RCBO, 40 A, 10 kA, Type A

MPN5SU9304-1KK40
Active

Siemens SENTRON 5SU9304-1KK40, RCD-operated circuit breaker (RCBO), 1P+N, 40 A, 10 kA, Type A, tripping characteristic C, 18 mm modular width.

Siemens 5SU9304-1KK40 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SU9304-1KK40 — Electrical Ratings
ParameterValue
Number of poles2
Overvoltage categoryIII
5SU9304-1KK40 — Identification
ParameterValue
Product designationRCD-operated circuit breaker
Product design / constructionInstantaneous
5SU9304-1KK40 — Mechanical
ParameterValue
Mounting positionany
Width in modular units1
Maximum75 °C
Minimum-40 °C
Width18 mm
Height125 mm
Depth77 mm
Installation depth70 mm
5SU9304-1KK40 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors
5SU9304-1KK40 — Electrical
ParameterValue
Tripping Characteristic ClassC

Product details

The Siemens 5SU9304-1KK40 is a SENTRON-series RCBO — an RCD-operated circuit breaker that combines overcurrent protection and residual current detection in a single 18 mm-wide module.

Thermal derating and mounting flexibility

At 40 °C it derates to 37.6 A, at 45 °C to 36.4 A, at 50 °C to 34.8 A, and at 55 °C to 32.4 A. If the panel ambient runs warm, size the upstream protection accordingly.

Integration into a panel

The installation depth is 70 mm, and the overall depth is 77 mm — check that the enclosure or distribution board has clearance for that depth plus wiring space.

Frequently asked questions

What is the breaking capacity of 5SU9304-1KK40?

It is rated 10 kA per both EN 60898 and IEC 60947-2, which is the standard interrupting rating for this class of RCBO in commercial panelboards.

What is the width of 5SU9304-1KK40?

18 mm, which is one modular unit (1 MW) on a standard DIN rail.

Where can I buy 5SU9304-1KK40?

This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time.

Will 5SU9304-1KK40 drop into a panel specified around 5SY4116-7CV?

Both are 18 mm wide DIN-rail devices, so the mechanical fit is the same. However, 5SU9304-1KK40 is an RCBO (overcurrent + RCD combined), while the 5SY series are standalone MCBs. The wiring and circuit design differ — verify the circuit requires combined protection before substituting.

MPN
5SU9304-1KK40