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Siemens 5SL6450-6 — 4-Pole MCB (DIN Rail)

Siemens 5SL6450-6 SENTRON MCB, 4P, 50 A, B Curve, 6 kA

MPN5SL6450-6
Active

Siemens SENTRON 5SL6450-6 miniature circuit breaker, 4-pole, B characteristic, 50 A rated at 400 V AC, 6 kA breaking capacity per EN 60898 and IEC 60947-2.

Siemens 5SL6450-6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL6450-6 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityResidential buildings/infrastructure
5SL6450-6 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC50 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, DC (max.)72 V
Voltage typeAC
5SL6450-6 — Protection
ParameterValue
Tripping characteristic (trip curve)B
Rated breaking capacity (Icn), per EN 608986 kA
Rated breaking capacity, per IEC 60947-26 kA
Energy limitation class3
Overvoltage categoryIII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SL6450-6 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SL6450-6 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)Periodically +55°C, max. 95% humidity

Product details

The Siemens 5SL6450-6 is a SENTRON miniature circuit breaker (MCB) — 4-pole, 50 A, B-curve trip characteristic, rated for 400 V AC with a 6 kA breaking capacity under both EN 60898 and IEC 60947-2.

At 40 °C ambient the 50 A rating derates to 46.97 A; at 55 °C it drops to 42.01 A. Mounting position any, which helps when the gland plate forces a rotated layout. IP20 with conductors connected — fine inside a closed panel, not for wet or washdown zones. The sealable feature lets a panel builder lock the handle position after commissioning to prevent unauthorized reset.

Frequently asked questions

What is the breaking capacity of the 5SL6450-6?

6 kA under both EN 60898 and IEC 60947-2 at 400 V AC. That covers most residential and light commercial fault levels; for higher available fault current you'd step to a higher-rated MCB or an upstream fuse.

Where can I buy the 5SL6450-6?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here.

Will the 5SL6450-6 drop into a panel specified for the 5SL6550-7BB?

Not without checking the trip curve and rating. The 5SL6550-7BB is a different order code with its own characteristic and current; the 5SL6450-6 is a B-curve 50 A 4-pole. If the panel was designed around a different ampacity or curve, the protective coordination changes — verify the existing breaker's rating and curve before swapping.

What compliance documentation does Siemens provide for the 5SL6450-6?

The part carries the SENTRON brand and is designed to EN 60898 and IEC 60947-2. Standard Siemens MCB documentation includes a declaration of conformity covering the applicable directives; specific RoHS, REACH, and UL documentation is available on request through the supply channel.

MPN
5SL6450-6