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Siemens 5SQ3670-1BA40 — Miniature Circuit Breakers (MCB)

Siemens SENTRON 5SQ3670-1BA40 MCB, 4-pole C-curve 40 A, 3 kA

MPN5SQ3670-1BA40

Siemens SENTRON 5SQ series, 5SQ3670-1BA40, 4-pole MCB, C-curve, 40 A, 3 kA breaking capacity per EN 60898, 400 V AC, 50 Hz, IP20.

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

5SQ3670-1BA40 — Ratings
ParameterValue
Overvoltage category3
5SQ3670-1BA40 — Other specifications
ParameterValue
Poles4
Type of voltageAC/DC
Installation depth55 mm
Protection class IPIP20
Energy limiting class3
Number of width units3
Number of poles (Note)3P+N
Circuit-breaker (Design)5SQ
Current (at AC)40 A
Tripping characteristic classC
Acc. to EN 60898 / rated value3 kA
Supply voltage (at AC)400 V
Supply voltage frequency50 Hz
Product function (neutral conductor switching)Yes

Product details

Integrator note — 5SQ3670-1BA40

The Siemens SENTRON 5SQ3670-1BA40 is a 4-pole miniature circuit breaker (3P+N) with a C-curve trip characteristic, rated 40 A at 400 V AC, 50 Hz. The neutral pole is switched (product function / neutral conductor switching = Yes), so this breaker disconnects the neutral as well as the three phases — required in some regional wiring codes and for TN-S or TT systems where a switched neutral is specified. The 55 mm installation depth and 3 width units (17.5 mm per unit) fit standard DIN-rail enclosures; IP20 protection means it is intended for enclosed panel mounting, not wet or dusty environments.

Panel fit and compliance

The 55 mm depth leaves clearance for standard busbar systems and wiring ducts.

Frequently asked questions

What is the breaking capacity of 5SQ3670-1BA40?

3 kA per EN 60898 at 400 V AC. For higher fault-current installations, verify coordination with the upstream protective device.

Where can I buy 5SQ3670-1BA40 and how is it quoted?

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

Does 5SQ3670-1BA40 switch the neutral?

Yes, the neutral conductor is switched. The breaker is 3P+N, so all four poles — three phases plus neutral — are disconnected when tripped.

MPN
5SQ3670-1BA40