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Siemens 5SY3220-7 — 2-Pole MCB (DIN Rail)

Siemens 5SY3220-7 SENTRON MCB, 2-Pole C-Curve 20 A 400 V

MPN5SY3220-7

Siemens SENTRON 5SY3 series, miniature circuit breaker, 2-pole, C-curve, 20 A rated current at 400 V AC, breaking capacity 4.5 kA per EN 60898 / 6 kA per IEC 60947-2.

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

Specifications

5SY3220-7 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
5SY3220-7 — Electrical
ParameterValue
Number of poles2
5SY3220-7 — Protection
ParameterValue
Tripping characteristic classC
Overvoltage categoryIII
5SY3220-7 — Mechanical
ParameterValue
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors

Product details

The Siemens 5SY3220-7 is a SENTRON 5SY3 miniature circuit breaker — 2-pole, C-curve, rated 20 A at 400 V AC. It's the spare you keep one of in the cabinet for a legacy distribution board or sub-panel, not a part you want to chase after a fault.

Breaking capacity and standards coverage

Rated breaking capacity is 4.5 kA per EN 60898 and 6 kA per IEC 60947-2 at 400 V AC. That covers most sub-distribution fault levels; if your panel SCCR is higher, the 6 kA IEC figure gives a bit more headroom for coordination studies. For DC circuits, the 2-pole series connection yields 15 kA at 72 V DC per IEC 60947-2 — useful for control bus protection or battery-backed loads. Also carries a UL 1077 / CSA C22.2 No. 235 rating of 5 kA at AC, so it's accepted in North American supplementary-protection applications.

Snaps onto DIN rail via the quick-assembly system — 2 width units (36 mm wide), 90 mm tall, 76 mm deep with a 70 mm installation depth. Mount in any position; terminal design allows top or bottom feed.

Frequently asked questions

Where can I buy 5SY3220-7 and get a price?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

What is the breaking capacity of 5SY3220-7?

4.5 kA per EN 60898 and 6 kA per IEC 60947-2 at 400 V AC. For DC, 15 kA at 72 V per IEC 60947-2. Also rated 5 kA per UL 1077 / CSA C22.2 No. 235.

Will 5SY3220-7 drop into a panel specified for 5SY3132-6?

Both are 2-pole, same DIN-rail footprint (36 mm width, 70 mm installation depth), so mechanical fit is identical. The difference is rating: 5SY3220-7 is a 20 A C-curve; 5SY3132-6 is a 32 A C-curve. No rewiring needed if the circuit ampacity matches the higher rating.

MPN
5SY3220-7