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Siemens 5SQ3270-1BA25 — 1-Pole MCB (DIN Rail)

SENTRON 5SQ3270-1BA25 MCB, 2-Pole, C-Curve, 25 A, 240 V AC

MPN5SQ3270-1BA25

SENTRON 5SQ3270-1BA25, miniature circuit breaker, 2-pole (1P+N), C-curve, 25 A rated at 240 V AC, 3 kA breaking capacity per EN 60898, IP20, 55 mm depth.

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

5SQ3270-1BA25 — Identification
ParameterValue
Brand nameSENTRON
Number of poles2
5SQ3270-1BA25 — Electrical & Protection
ParameterValue
Tripping characteristic classC
Rated value (EN 60898)3 kA
Overvoltage category3
5SQ3270-1BA25 — Mounting & Connection
ParameterValue
Installation depth55 mm
5SQ3270-1BA25 — Environmental
ParameterValue
IP protection classIP20
5SQ3270-1BA25 — Other specifications
ParameterValue
Type of voltageAC/DC
Energy limiting class3
Number of width units2
Number of poles (Note)1P+N
Circuit-breaker (Design)5SQ
Current (at AC)25 A
Supply voltage (at AC)240 V
Supply voltage frequency50 Hz
Product function (neutral conductor switching)Yes

Product details

Quick fit check

The SENTRON 5SQ3270-1BA25 is a 2-pole miniature circuit breaker (1P+N configuration) with a C-curve trip characteristic, rated 25 A at 240 V AC, 50 Hz. Breaking capacity is 3 kA per EN 60898. Neutral conductor switching is included — this is the integrated neutral pole, not a separate accessory.

Overvoltage category 3 means it's rated for fixed-installation protection against switching surges. Energy limiting class 3 means it restricts let-through energy enough to protect downstream wiring and devices in most branch circuits.

Snap-on DIN rail mount, 2 width units, 55 mm depth. IP20 finger-safe terminals — suitable for enclosed panel use only, not washdown or outdoor. Rated for AC/DC supply, so the same breaker can serve control transformers or DC power supplies in the same panel.

Frequently asked questions

What is the closest functional alternative to 5SQ3270-1BA25?

The closest peer is 5SQ2270-2YA04, also a 2-pole C-curve SENTRON 5SQ breaker, but rated 4 A instead of 25 A. The 25 A version is the one you need for higher-current branch circuits; the 4 A variant suits control or lighting loads. Both share the same 55 mm depth, 2 width units, and 3 kA breaking capacity.

Where can I buy 5SQ3270-1BA25?

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

What is the number of poles on 5SQ3270-1BA25?

It is a 2-pole device in a 1P+N configuration — one phase pole plus a switched neutral.

What type of voltage does 5SQ3270-1BA25 accept?

AC/DC. Rated 240 V AC at 50 Hz; the DC rating is not specified in this data, so for DC circuits verify the manufacturer's DC derating curve separately.

MPN
5SQ3270-1BA25