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Siemens 5SY3140-6 — 1-Pole MCB (DIN Rail)

Siemens 5SY3140-6 SENTRON MCB, 1P 40A B-Curve, 4.5kA

MPN5SY3140-6

Siemens SENTRON 5SY3 series, miniature circuit breaker, 1-pole, 40 A, B tripping characteristic, 4.5 kA per EN 60898, 6 kA per IEC 60947-2, 400 V AC, 18 mm width, IP20.

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

Specifications

5SY3140-6 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
5SY3140-6 — Electrical & Protection
ParameterValue
Tripping characteristic classB
Rated value (EN 60898)4.5 kA
Overvoltage categoryIII
5SY3140-6 — Mounting & Connection
ParameterValue
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
SealableYes
5SY3140-6 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Halogen-freeYes
Silicone-freeYes

Product details

It breaks fault currents up to 4.5 kA per EN 60898 and 6 kA per IEC 60947-2 at 400 V AC, with a DC rating of 15 kA per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No.235.

Terminal and mounting details

Mounting is via the quick-assembly system (snap-on DIN rail) in any position. Humidity influence: max 95% at 55 °C, derating at higher temperatures.

Approvals and standards

Rated and tested to EN 60898 (4.5 kA), IEC 60947-2 (6 kA AC, 15 kA DC), and UL 1077 / CSA C22.2 No.235 (5 kA AC). Overvoltage category III. Energy limiting class 3. The part carries the SENTRON brand and is classified per DIN EN 61346-2 and DIN EN 81346-2 as function F.

Frequently asked questions

Where can I buy 5SY3140-6 and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing.

What is the difference between 5SY3140-6 and 5SY4140-7?

The 5SY4140-7 is a 1-pole 40 A breaker with a C tripping characteristic (5–10× In), versus the B curve (3–5× In) on the 5SY3140-6. The C curve is better for moderate inrush loads like small motors and transformers. Both share the same 18 mm width, 70 mm installation depth, and terminal range. They are not direct drop-in replacements without verifying the trip curve required by the circuit.

What compliance documentation does this brand provide for 5SY3140-6?

The part is tested to EN 60898, IEC 60947-2, and UL 1077 / CSA C22.2 No.235. It is halogen-free and silicon-free. Standard documentation includes the declaration of conformity and test certificates per these standards.

MPN
5SY3140-6