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Siemens 5SY3020-7WM — 1-Pole MCB (DIN Rail)

Siemens 5SY3020-7WM SENTRON MCB, 20A C-Curve 1P+N 4.5kA

MPN5SY3020-7WM

Siemens SENTRON 5SY3020-7WM miniature circuit breaker, 230 V AC, 20 A, C-curve, 1P+N, 4.5 kA breaking capacity per EN 60898, 18 mm wide, DIN rail mount.

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

Specifications

5SY3020-7WM — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
5SY3020-7WM — Electrical & Protection
ParameterValue
Tripping characteristic classC
Rated value (EN 60898)4.5 kA
Overvoltage categoryIII
5SY3020-7WM — Mounting & Connection
ParameterValue
Mounting positionany
Combined terminal, topNo
Combined terminal, bottomNo
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SY3020-7WM — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Halogen-freeYes
Silicone-freeYes

Product details

The Siemens SENTRON 5SY3020-7WM is a 1P+N miniature circuit breaker rated 20 A at 230 V AC, with a C-curve trip characteristic and a 4.5 kA breaking capacity per EN 60898. It occupies a single 18 mm width unit on standard DIN rail, making it a direct swap for any 1-module MCB in a residential or light-commercial distribution board. The 1P+N pole configuration switches both phase and neutral, with the neutral pole switching but not protecting.

The 18 mm width (1 modular unit) and 70 mm installation depth mean it fits standard consumer units and sub-distribution boards without crowding adjacent ways. IP20 protection with connected conductors — suitable for enclosed distribution panels, not for wet or outdoor locations.

Frequently asked questions

What is the breaking capacity of the 5SY3020-7WM?

4.5 kA per EN 60898 at 230 V AC. This is the standard breaking capacity for residential and light-commercial distribution boards; for industrial panels requiring higher fault current ratings, consider the 5SY6 or 5SL series which offer 6 kA.

Will the 5SY3020-7WM drop into a panel specified around the 5SY6008-7?

Yes — both share the same 18 mm width, 70 mm installation depth, DIN rail mount, and 1P+N pole configuration. The 5SY3020-7WM is rated 20 A C-curve with 4.5 kA breaking capacity, while the 5SY6008-7 is 8 A C-curve with 6 kA. No rewiring or panel modification needed for the swap, but verify the fault current rating at the panel's service entrance.

Where can I buy the 5SY3020-7WM?

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.

MPN
5SY3020-7WM