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Siemens 5SY5120-7 — 1-Pole MCB (DIN Rail)

Siemens 5SY5120-7 SENTRON MCB, C-Curve, 1P, 10kA, 400V AC

MPN5SY5120-7
Active

Siemens SENTRON 5SY5120-7, 1-pole miniature circuit breaker, C-curve, 400 V AC / 220 V DC, 10 kA (IEC 60898) / 15 kA (IEC 60947-2), 18 mm wide, IP20.

$19.05Ref. price · indicative, final on quote
Siemens 5SY5120-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5120-7 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityuniversal current
5SY5120-7 — Electrical & Protection
ParameterValue
Tripping characteristic classC
Energy limitation class3
Overvoltage categoryIII
5SY5120-7 — Mounting & Connection
ParameterValue
Mounting positionany
Fastening methodQuick assembly system
Combined terminal, topYes
Combined terminal, bottomYes
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Modular width units1
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SY5120-7 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

The quick-assembly fastening system and any-position mounting simplify panel layout.

Rated for ambient temperatures from -40 °C to 75 °C, with humidity derating above 55 °C (95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C). Halogen-free and silicon-free construction. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. Energy limitation class 3. Standards compliance includes IEC/EN 60898-2 and UL1077.

Frequently asked questions

Where can I buy 5SY5120-7 and what is the lead time?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead-time figure is published here.

Will 5SY5120-7 drop into a panel that was specified around 5SY5240-7 without rewiring?

Yes — both are 18 mm wide, single-pole SENTRON MCBs on the same DIN-rail clip with the same terminal layout. The only difference is the current rating; the 5SY5120-7 carries a lower ampacity than the 5SY5240-7, so confirm the circuit load before substituting.

What compliance documentation does Siemens provide for 5SY5120-7?

The part is certified to IEC/EN 60898-2 and UL1077. It is halogen-free and silicon-free. Full RoHS and REACH declarations are standard with Siemens SENTRON products.

MPN
5SY5120-7