Skip to main content
Log in
Siemens 5SL6120-7MB — 1-Pole MCB (DIN Rail)

Siemens 5SL6120-7MB SENTRON MCB, 1P C 20 A, 6 kA

MPN5SL6120-7MB
Active

Siemens SENTRON miniature circuit breaker, 5SL6120-7MB, 1-pole, C-curve, 20 A rated, 6 kA breaking capacity per EN 60898, 400 V AC, 1 MW width.

Siemens 5SL6120-7MB datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL6120-7MB — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityResidential buildings/infrastructure
5SL6120-7MB — Electrical & Protection
ParameterValue
Tripping characteristic classC
Energy limitation class3
Overvoltage categoryIII
5SL6120-7MB — Mounting & Connection
ParameterValue
Mounting positionany
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Modular width units1
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SL6120-7MB — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree2
Halogen-freeYes
Silicone-freeYes

Product details

The Siemens SENTRON 5SL6120-7MB is a 1-pole miniature circuit breaker rated 20 A with a C tripping characteristic and a 6 kA breaking capacity per EN 60898. The C-curve handles moderate inrush from motorized loads and fluorescent lighting without nuisance tripping — common for general-purpose branch circuits.

Voltage and breaking capacity

Rated for single-phase AC up to 250 V and multi-phase up to 440 V at 50/60 Hz.

Installation depth of 70 mm leaves clearance for wiring behind the rail.

Auxiliary and mechanical details

Accepts supplementary devices (shunt trip, auxiliary contacts, alarm switch) for remote signaling or emergency shutdown. Mechanical life rated at 10,000 operating cycles typical — adequate for daily switching in a lighting or small-motor circuit.

Frequently asked questions

Where can I buy 5SL6120-7MB and how do I get a price?

This part is 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 closest functional alternative to 5SL6120-7MB?

The 5SL6006-7 is a 1P+N (switched neutral) version with the same C-curve and 6 kA rating, but rated 6 A instead of 20 A. The 5SL6016-7 is also 1P+N at 16 A. Neither is a drop-in replacement for the 20 A single-pole 5SL6120-7MB — the pole count and current differ. For a true 1-pole 20 A C-curve, stick with this order code.

Will 5SL6120-7MB drop into a panel specified around 5SL6006-7 without rewiring?

No — the 5SL6006-7 is a 1P+N design that switches both line and neutral, while the 5SL6120-7MB is 1-pole only. The footprint (1 MW) and DIN-rail mounting are the same, but the wiring scheme differs: the 5SL6120-7MB requires a separate neutral bar. Rewiring is needed.

What compliance documentation does Siemens provide for 5SL6120-7MB?

The 5SL6120-7MB is designed to EN 60898-1 and carries CE marking for the European market. It is halogen-free and silicon-free per the spec. For specific documentation (declaration of conformity, RoHS, REACH), request it with your RFQ — standard for this active line.

MPN
5SL6120-7MB