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Siemens 5SJ6320-6KS — 3-Pole MCB (DIN Rail)

Siemens 5SJ6320-6KS SENTRON MCB, 3P B-curve 20A 6kA

Name: 5SJ6320-6KS
Brand: Siemens
SKU: 5SJ6320-6KS
Availability: LimitedAvailability
Author: Salvage Sven

MPN5SJ6320-6KS

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Siemens SENTRON 5SJ6 series miniature circuit breaker, 5SJ6320-6KS, 3-pole, B-curve, 20 A, 6 kA breaking capacity per IEC 60947-2, 400 V AC, 3 modular width units, screwless outgoing terminals.

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Siemens 5SJ6320-6KS datasheet (PDF)

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

Specifications

5SJ6320-6KS — Identification
Parameter	Value
Brand name	SENTRON
Number of poles	3
Pole configuration	3P
Suitability for operation	Residential buildings/infrastructure

5SJ6320-6KS — Protection
Parameter	Value
Tripping characteristic (curve)	B
Breaking capacity per EN 60898	6 kA
Breaking capacity per IEC 60947-2	6 kA
Overvoltage category	3
IP protection class	IP20, with connected conductors
Energy limitation class	3
Pollution degree	2

5SJ6320-6KS — Electrical
Parameter	Value
Power loss per pole at rated current (AC, hot)	2.2 W
Mechanical service life (operating cycles, typ.)	20 000

5SJ6320-6KS — Mechanical
Parameter	Value
Modular width units	3
Mounting position	any
Width	54 mm
Height	90 mm
Depth	76 mm
Installation depth	70 mm
Terminal tightening torque, max.	75 °C
Terminal tightening torque, min.	-40 °C
Sealable	Yes
Accepts supplementary devices	No

5SJ6320-6KS — Environmental
Parameter	Value
Halogen-free	Yes
Silicone-free	Yes
Influence of surrounding temperature	Periodically +55°C, max. 95% humidity

Product details

The Siemens 5SJ6320-6KS is a SENTRON 5SJ6-series miniature circuit breaker — a 3-pole, B-curve device rated 20 A with a 6 kA breaking capacity per both EN 60898 and IEC 60947-2. The 20 A rating at 400 V AC three-phase means each pole carries 20 A continuously. Power loss per pole is 2.2 W in hot operating state.

Mounting and integration — DIN-rail fit and panel constraints

Screwless outgoing terminals speed up wiring on a production line: strip to the recommended length, push the conductor in, done. The 3-pole design means a single unit handles three-phase circuits — no ganging of single-pole breakers needed.