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Siemens 5SQ2160-2YA40 — 1-Pole MCB (DIN Rail)

Siemens SENTRON 5SQ2160-2YA40 MCB, 1P, B Curve, 40 A, 3 kA

MPN5SQ2160-2YA40

Siemens SENTRON 5SQ miniature circuit breaker, 1-pole, B characteristic, 40 A rated current, 3 kA breaking capacity per EN 60898, 240 V AC/DC, IP20, 55 mm installation depth.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SQ2160-2YA40 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
5SQ2160-2YA40 — Electrical & Protection
ParameterValue
Tripping characteristic classB
Energy limitation class3
Overvoltage category3
5SQ2160-2YA40 — Mounting & Connection
ParameterValue
Installation depth55 mm
Modular width units1
5SQ2160-2YA40 — Environmental
ParameterValue
IP protection classIP20
Pollution degree3

Product details

The Siemens SENTRON 5SQ2160-2YA40 is a 1-pole miniature circuit breaker with a B tripping characteristic, rated at 40 A at 30 °C and 240 V AC/DC.

The B-curve trips between 3 and 5 times rated current (120–200 A), so it's a good match for resistive and lighting loads with low inrush — not for motor circuits where a C or D curve would be needed to avoid nuisance tripping on startup. Thermal derating is published: at 40 °C the breaker carries 37 A, at 50 °C it drops to 34.8 A, and at 60 °C to 32 A. The 55 mm installation depth fits standard DIN-rail enclosures; the single modular width unit (18 mm) saves rail space compared to wider 2-pole alternatives.

For a BOM line that calls out this exact 5SQ2160-2YA40, the fit is confirmed by the 1-pole, 40 A, B-curve, 3 kA specs.

Frequently asked questions

What is the breaking capacity of 5SQ2160-2YA40?

3 kA per EN 60898 at 240 V AC — suitable for residential and light commercial final circuits where available fault current is below that level.

Will 5SQ2160-2YA40 drop into a panel specified for 5SY6040-6?

Both are 1-module-width SENTRON MCBs, but the 5SY6040-6 has a 6 kA breaking capacity, a 70 mm depth, and a 1P+N pole design with neutral switching — the 5SQ2160-2YA40 is 1P only and 55 mm deep, so it physically fits the same DIN rail but may not match the panel's fault-current rating or neutral-switching requirement without a design review.

How do I get pricing and availability for 5SQ2160-2YA40?

Submit an RFQ through this listing — availability and current pricing are confirmed at quote time through independent distribution channels.

MPN
5SQ2160-2YA40