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Siemens 5SL3432-7MB — 4-Pole MCB (DIN Rail)

Siemens 5SL3432-7MB SENTRON MCB, 4P C-Curve 32A 4.5kA

MPN5SL3432-7MB
Active

Siemens SENTRON 5SL3432-7MB, miniature circuit breaker, 4-pole, C-curve, 32 A rated current, 4.5 kA breaking capacity.

Siemens 5SL3432-7MB datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL3432-7MB — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityResidential buildings/infrastructure
5SL3432-7MB — Ratings
ParameterValue
Number of poles4
Rated current (In), AC32 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, DC (max.)72 V
5SL3432-7MB — Protection
ParameterValue
Tripping characteristic (trip curve)C
Rated breaking capacity (Icn), per EN 608984.5 kA
Rated breaking capacity, per IEC 60947-24.5 kA
Energy limitation class3
Overvoltage categoryIII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SL3432-7MB — 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
5SL3432-7MB — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
5SL3432-7MB — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)20 000

Product details

At 32 A, this breaker handles a 7.3 kW resistive load at 230 V per pole, or a 22 kW three-phase load at 400 V. Temperature derating is built in: at 40 °C ambient the continuous rating drops to 30.4 A, and at 45 °C it's 29.76 A. In a warm enclosure or summer attic install, that's the number to use for load calculations, not the 30 °C figure.

This is a DIN-rail mounted MCB for residential buildings and infrastructure — think consumer units, sub-distribution boards, and commercial lighting panels. The 76 mm depth (70 mm installation depth) fits standard shallow enclosures. Touch protection is built in — no live parts exposed when installed in a proper distribution board.

Frequently asked questions

What is the breaking capacity of 5SL3432-7MB?

The breaking capacity is 4.5 kA per both EN 60898 and IEC 60947-2. That's the standard rating for residential and light commercial distribution boards.

What is the width of 5SL3432-7MB?

The width is 72 mm, which corresponds to 4 modular width units on a standard DIN rail.

Will 5SL3432-7MB drop into a panel specified around 5SL3232-6MB?

No — the 5SL3232-6MB is a 2-pole, B-curve, 32 A unit with a 36 mm width (2 modular units). The 5SL3432-7MB is 4-pole, C-curve, and 72 mm wide, so it takes twice the rail space and has different trip characteristics. They are not drop-in interchangeable.

Where can I buy 5SL3432-7MB and get current pricing?

This part is sourced to order through our independent distribution network. Submit an RFQ for current pricing and availability — we confirm both at quote time.

MPN
5SL3432-7MB