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Siemens 5SM3318-0KK — Residual Current Breakers (RCCB/RCBO)

Siemens SENTRON 5SM3318-0KK RCCB, 100 A, 30 mA, 2-pole, Type

MPN5SM3318-0KK

Siemens SENTRON 5SM3318-0KK RCCB, 2-pole, Type AC, 100 A rated, 30 mA trip, 230 V AC, 10 kA SCCR, DIN rail mount, 2 MW units.

Siemens 5SM3318-0KK 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

5SM3318-0KK — Electrical Ratings
ParameterValue
Number of poles2
Overvoltage categoryIII
5SM3318-0KK — Identification
ParameterValue
Product designationRCCB
Product design / constructionInstantaneous
5SM3318-0KK — Mechanical
ParameterValue
Mounting positionany
Width in modular units2
Maximum45 °C
Minimum-5 °C
Installation depth70 mm
5SM3318-0KK — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors

Product details

The Siemens SENTRON 5SM3318-0KK is a 2-pole residual current operated circuit breaker (RCCB), Type AC, rated 100 A with a 30 mA trip threshold on 230 V AC at 50 Hz.

Installation depth is 70 mm — measure your enclosure's clear space behind the rail before committing. Supply can land top or bottom, which helps when reworking an existing board without flipping the busbar. IP20 with conductors connected and distribution board installed — that's protected-finger touch only.

Breaking capacity and standard compliance

Rated short-circuit current (SCCR) is 10 kA per IEC 61008-1; the EN 60898 rating is 1 kA. Overvoltage category III confirms it's rated for fixed-installation mains (distribution level, not sub-circuits).

Ambient limits and thermal derating

The 45 °C ceiling is the running limit — above that you'd need to derate the 100 A continuous rating, though the datasheet doesn't publish a curve. If your panel internal temperature regularly hits 40 °C+ (sunlit enclosure, high-density gear), factor in headroom.

Frequently asked questions

How do I get current pricing and availability for 5SM3318-0KK?

Submit an RFQ through this listing. The part is sourced to order against a confirmed quote; availability and price are confirmed at quote time.

Will 5SM3318-0KK drop into a panel specified around 5SL6550-7BB without rewiring?

Both are 2-pole, 2 MW units on DIN rail, so the physical footprint is the same. But the 5SL6550-7BB is a miniature circuit breaker (MCB), not an RCCB — it provides overcurrent and short-circuit protection only. The 5SM3318-0KK provides residual-current protection (30 mA) but no overcurrent protection. They are not drop-in substitutes; the panel's protection scheme determines which one fits.

What compliance documentation does this brand provide for 5SM3318-0KK?

As a SENTRON device, it carries IEC 61008-1 and EN 60898 compliance. The evidence does not list specific RoHS, REACH, or UL documentation, but Siemens standard practice is to provide these declarations on request through the RFQ process.

MPN
5SM3318-0KK