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Siemens 5SM3618-0KK — Residual Current Breakers (RCCB/RCBO)

Siemens 5SM3618-0KK SENTRON RCCB, 2-pole, 100A, 300mA, Type

MPN5SM3618-0KK

Siemens SENTRON 5SM3618-0KK, 2-pole RCCB, Type AC, rated 100 A, 300 mA trip, instantaneous, 10 kA SCCR, DIN rail mount.

Siemens 5SM3618-0KK 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

5SM3618-0KK — Electrical Ratings
ParameterValue
Number of poles2
Overvoltage categoryIII
5SM3618-0KK — Identification
ParameterValue
Product designationRCCB
Product design / constructionInstantaneous
5SM3618-0KK — Mechanical
ParameterValue
Mounting positionany
Width in modular units2
Maximum45 °C
Minimum-5 °C
Installation depth70 mm
5SM3618-0KK — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors

Product details

It's an instantaneous design, meaning it clears a ground fault as soon as the residual current exceeds that 300 mA level, with no intentional delay.

Supply can enter from top or bottom, which simplifies busbar routing in a crowded distribution board. The IP20 rating applies once the board is installed with conductors connected; it's not a standalone outdoor device.

The 45 °C ceiling is the limiting factor for panel placement — if the enclosure interior runs hotter than that, you need to derate or move the RCCB to a cooler zone. The device is silicon-free, which matters for potting and coating compatibility in some industrial environments.

Frequently asked questions

What is the closest functional second-source to 5SM3618-0KK?

The 5SU9354-7KK16 is a sibling in the same SENTRON family — also 2-pole, Type AC, instantaneous, DIN rail mount, with a 10 kA SCCR and 10 000 cycle life. The key difference is that the 5SU9354-7KK16 is an RCBO (RCD + MCB combined) with a C-curve overcurrent trip, while the 5SM3618-0KK is a pure RCCB with no overcurrent protection. They share the same 70 mm installation depth and 2-module width, so the 5SU9354-7KK16 will physically fit the same panel footprint, but it adds the overcurrent function and changes the wiring because it's 1P+N rather than 2-pole.

Will 5SM3618-0KK drop into a panel specified around 5SU9354-7KK16 without rewiring?

Physically yes — both are 2-module-width DIN rail devices with 70 mm installation depth. But electrically no: the 5SM3618-0KK is a 2-pole RCCB switching both L and N, while the 5SU9354-7KK16 is a 1P+N RCBO switching only the phase. You would need to re-terminate the neutral conductor and account for the missing overcurrent protection.

Where can I buy 5SM3618-0KK and how is it quoted?

This part is 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
5SM3618-0KK