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Siemens 5SL6120-6RC — 1-Pole MCB (DIN Rail)

Siemens SENTRON 5SL6120-6RC MCB 20 A 1-pole B 7.5 kA

MPN5SL6120-6RC
Active

Siemens SENTRON miniature circuit breaker, 5SL6120-6RC, 20 A, 1-pole, B characteristic, 7.5 kA per EN 60898, 1 MW.

Siemens 5SL6120-6RC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL6120-6RC — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityResidential buildings/infrastructure
5SL6120-6RC — Electrical & Protection
ParameterValue
Tripping characteristic classB
Rated value (EN 60898)7.5 kA
Energy limitation classNo
Overvoltage categoryIII
5SL6120-6RC — 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
5SL6120-6RC — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree2
Halogen-freeYes
Silicone-freeYes

Product details

The single modular width (18 mm) means it occupies one slot on a DIN rail — a direct swap into any panel laid out for 1-MW breakers.

Temperature and derating

Above 30 °C you'll need to derate per the thermal curve — a standard practice for any thermal-magnetic MCB.

DC capability and voltage limits

Rated for DC operation up to 72 V maximum — useful for small DC distribution panels or control circuits, but not for higher-voltage battery banks. On the AC side, single-phase is rated 250 V; multi-phase (line-to-line) is rated 440 V. No neutral conductor switching built in — this is a single-pole breaker that switches only the phase.

Frequently asked questions

Will 5SL6120-6RC drop into a panel specified for 5SL3116-6MB?

Yes, both are 1-pole SENTRON MCBs with the same 18 mm width, 76 mm depth, and DIN-rail footprint. The 5SL6120-6RC is rated 20 A with a 7.5 kA breaking capacity, while the 5SL3116-6MB is 16 A with a 4.5 kA breaking capacity — so the 5SL6120-6RC is a higher-current, higher-fault-rated drop-in if the circuit design allows.

What is the width of 5SL6120-6RC?

18 mm, which is one modular width unit (1 MW) on a DIN rail.

What compliance documentation does Siemens provide for 5SL6120-6RC?

The part carries EN 60898 certification for the 7.5 kA breaking capacity rating, and it's halogen-free and silicon-free. Standard Siemens declarations for RoHS and REACH are available on request.

Where can I buy 5SL6120-6RC?

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

MPN
5SL6120-6RC