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Siemens 5SU1656-0KK25 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SU1656-0KK25 SENTRON RCBO, 25 A, 6 kA, Type B, 2-po

MPN5SU1656-0KK25

Siemens SENTRON 5SU1656-0KK25 RCBO, 2-pole 1P+N, Type B, 25 A at 30 °C, 6 kA per EN 60898, 230/240 V AC, 50 Hz.

Siemens 5SU1656-0KK25 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

5SU1656-0KK25 — Electrical Ratings
ParameterValue
Number of poles2
Overvoltage categoryIII
5SU1656-0KK25 — Identification
ParameterValue
Product designationRCBO
Product design / constructionInstantaneous
5SU1656-0KK25 — Mechanical
ParameterValue
Mounting positionany
Width in modular units2
Maximum75 °C
Minimum-40 °C
Width36 mm
Height90 mm
Depth77 mm
Installation depth70 mm
5SU1656-0KK25 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors
5SU1656-0KK25 — Electrical
ParameterValue
Tripping Characteristic ClassB
Operational current / at AC / rated value25 A

Product details

The Siemens 5SU1656-0KK25 is a 2-pole (1P+N) RCBO from the SENTRON series, combining overcurrent protection and residual current detection in a single 2-module-width unit.

In a warm panel — say 40 °C — the continuous current drops to 23.5 A; at 50 °C it's 21.75 A; at 60 °C it's 20.25 A; at 70 °C it's 18.25 A. If your panel runs hot (enclosed DIN-rail enclosures in summer can easily hit 50–60 °C), size the upstream protection and load accordingly.

Panel integration

Mounting position is any — no restriction on upright or sideways.

Frequently asked questions

What is the breaking capacity of 5SU1656-0KK25?

6 kA per EN 60898 and 15 kA per IEC 60947-2. The higher 15 kA rating applies when the device is used as an industrial circuit-breaker per IEC 60947-2, giving extra fault-current headroom in sub-distribution boards.

What is the difference between 5SU1656-0KK25 and 5SL6550-7BB?

The 5SL6550-7BB is a different SENTRON variant — it's a 2-pole RCBO but with a C characteristic and a different residual current rating. The 5SU1656-0KK25 is Type B (instantaneous at 3–5× In) and Type AC residual; the 5SL6550-7BB is Type C (instantaneous at 5–10× In). They are not drop-in substitutes without checking the circuit's inrush and fault-current profile.

Where can I buy 5SU1656-0KK25?

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.

MPN
5SU1656-0KK25