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Siemens 5SJ6520-6KS — 1-Pole MCB (DIN Rail)

Siemens 5SJ6520-6KS SENTRON MCB, 20 A, B Curve, 1P+N, 6 kA

MPN5SJ6520-6KS
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Siemens SENTRON 5SJ6 miniature circuit breaker, 20 A, B characteristic, 1P+N, 6 kA breaking capacity, 230 V AC, screwless outgoing terminals.

$11.43Ref. price · indicative, final on quote
Siemens 5SJ6520-6KS datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SJ6520-6KS — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles2
Application suitabilityResidential buildings/infrastructure
5SJ6520-6KS — Electrical & Protection
ParameterValue
Tripping characteristic classB
Rated value (EN 60898)6 kA
Overvoltage category3
5SJ6520-6KS — Mounting & Connection
ParameterValue
Mounting positionany
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SJ6520-6KS — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Halogen-freeYes
Silicone-freeYes

Product details

The Siemens 5SJ6520-6KS is a SENTRON 5SJ6 miniature circuit breaker rated 20 A at 230 V AC with a B tripping characteristic and 1P+N pole configuration.

The 20 A B-curve is the go-to for lighting, socket outlets, and small appliance circuits in European-style distribution boards. The 1P+N design switches both line and neutral, which is common in single-phase final subcircuits where neutral isolation is required. Screwless outgoing terminals (push-in) speed up panel wiring and reduce torque-check time on the assembly line. Mechanical service life is 20 000 switching cycles, which is typical for a residential-grade MCB — not a high-cycle machine tool breaker.

Panel integration

Mounting position is any — no restriction on orientation. The IP20 rating holds only with connected conductors, so the busbar and wiring must be in place before the breaker is considered touch-safe.

Frequently asked questions

Where can I buy 5SJ6520-6KS and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ to confirm current availability and pricing.

What is the difference between 5SJ6520-6KS and 5SL6016-7KL?

5SL6016-7KL is a 16 A B-curve 1P+N MCB from the same SENTRON family, but it uses a different breaking capacity rating (typically 10 kA per EN 60898) and screw-type terminals. The 5SJ6520-6KS is 20 A with 6 kA breaking capacity and screwless push-in terminals. Panel footprint (2 width units, 36 mm) is the same, so it drops into the same DIN slot without rewiring.

What is the depth of 5SJ6520-6KS?

Depth is 76 mm; installation depth is 70 mm.

What is the width of 5SJ6520-6KS?

Width is 36 mm, which corresponds to 2 width units on a standard DIN-rail mounting.

Will 5SJ6520-6KS drop into a panel specified for 5SL6016-7KL without rewiring?

Yes — both are 1P+N, 2-width-unit (36 mm) SENTRON MCBs on the same DIN-rail footprint. The 5SJ6520-6KS uses screwless push-in terminals, so if the panel was wired for screw terminals the conductors will still fit, but the termination method differs. No busbar or DIN-rail rework is needed.

MPN
5SJ6520-6KS