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Siemens 5SN6320-7CN — 3-Pole MCB (DIN Rail)

Siemens 5SN6320-7CN SENTRON MCB, 3P C-Curve 20A 6kA

MPN5SN6320-7CN

Siemens SENTRON miniature circuit breaker, 5SN6320-7CN, 3-pole, C-curve, 20 A rated, 6 kA breaking capacity at 400 V AC, 3 modular width units.

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

Specifications

5SN6320-7CN — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
5SN6320-7CN — Protection
ParameterValue
Tripping characteristic (curve)C
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree2
5SN6320-7CN — Electrical
ParameterValue
Rated current (AC)20 A
Rated voltage (AC, multi-phase)440 V
5SN6320-7CN — Mechanical
ParameterValue
Modular width units3
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Terminal tightening torque, max.75 °C
Terminal tightening torque, min.-40 °C
SealableYes
5SN6320-7CN — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes

Product details

Siemens 5SN6320-7CN — 3-pole C-curve MCB for 400 V distribution

The Siemens 5SN6320-7CN is a SENTRON miniature circuit breaker, 3-pole, with a C-curve trip characteristic rated at 20 A and a 6 kA breaking capacity at 400 V AC per EN 60898.

Rated 20 A at 30 °C ambient. At 40 °C the continuous rating drops to 18.86 A, at 45 °C to 18.26 A, at 50 °C to 17.65 A, and at 55 °C to 17.01 A. If the panel internal temperature runs hot — common in high-density enclosures — size the load to the derated value, not the 30 °C nameplate.

Fit and panel integration

Sealable, halogen-free, and silicon-free construction.

Frequently asked questions

What are the key ratings of 5SN6320-7CN?

It is a 3-pole C-curve miniature circuit breaker rated 20 A at 30 °C, with a 6 kA breaking capacity at 400 V AC per EN 60898. The C-curve trips between 5× and 10× rated current.

What is the thermal derating for 5SN6320-7CN at elevated ambient temperatures?

At 40 °C the rating is 18.86 A, at 45 °C it is 18.26 A, at 50 °C it is 17.65 A, and at 55 °C it is 17.01 A. Always derate the load to the ambient temperature inside the enclosure.

Where can I buy 5SN6320-7CN and how is it quoted?

The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm price and lead time.

Will 5SN6320-7CN drop into a panel designed for 5SL4120-7CC?

Both are 3-pole C-curve MCBs in a 3-module-width footprint, so the physical swap is possible. However, verify the 5SN6320-7CN's 6 kA breaking capacity at 400 V matches the panel's fault level — the 5SL4120-7CC may carry a different interrupting rating.

MPN
5SN6320-7CN