Skip to main content
Log in
Siemens 5SY7201-8 — 2-Pole MCB (DIN Rail)

Siemens 5SY7201-8 SENTRON MCB, 2P D 1A, 15/50 kA

MPN5SY7201-8
Active

Siemens SENTRON 5SY7201-8, 2-pole miniature circuit breaker, D tripping characteristic, 1 A rated, 15 kA / 50 kA breaking capacity.

Siemens 5SY7201-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7201-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY7201-8 — Electrical
ParameterValue
Number of poles2
5SY7201-8 — Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY7201-8 — Mechanical
ParameterValue
Modular width units2
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors
5SY7201-8 — Environmental
ParameterValue
Pollution degree3
5SY7201-8 — Specifications
ParameterValue
At AC rated value1 A
According to EN 60898 rated value15 kA
With single-phase operation at AC rated value440 V

Product details

It carries a 15 kA breaking capacity per IEC/EN 60898-1 and a 50 kA rating per IEC/EN 60947-2 / UL1077 — the higher figure matters when the breaker sits upstream of a transformer or in an industrial panel with high prospective fault current.

The quick-assembly system and combined top/bottom terminals speed rail wiring in high-density panels.

Thermal derating and environment

Rated 1 A at 35 °C ambient; derate to 0.95 A at 40 °C, 0.9 A at 50 °C, and 0.85 A at 60 °C. If the panel runs hot — common in sealed enclosures with multiple breakers — apply the derating curve rather than the 35 °C figure.

Frequently asked questions

Where can I buy 5SY7201-8 and how do I get a price?

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

Will 5SY7201-8 drop into a panel specified around 5SY4140-7 without rewiring?

Both are 2-pole SENTRON MCBs on a 36 mm DIN-rail footprint, so the mechanical fit is the same. The difference is the tripping curve — 5SY7201-8 is D-curve (10–20× In), while the 5SY4140-7 is B-curve (3–5× In). A panel wired for a B-curve breaker will accept the D-curve physically, but the protection coordination changes: the D-curve allows higher inrush without tripping, which is correct for motor or transformer loads but may not clear a low-impedance fault as fast as a B-curve would. Verify the load type and selective coordination before swapping.

What compliance documentation does Siemens provide for 5SY7201-8?

The breaker is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL1077. Standard RoHS and REACH declarations are included with the brand's documentation pack.

MPN
5SY7201-8