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Siemens 5SN6432-8CP — 4-Pole MCB (DIN Rail)

Siemens 5SN6432-8CP SENTRON MCB, 4-Pole, C-Curve, 6kA/15kA

MPN5SN6432-8CP

Siemens SENTRON 5SN6432-8CP, 4-pole miniature circuit breaker, C-curve, 400 V AC, 50 Hz, 6 kA (EN 60898) / 15 kA (IEC 60947-2), 4 MW units, 72 mm wide.

Siemens 5SN6432-8CP datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SN6432-8CP — Ratings
ParameterValue
Number of poles4
Rated voltage, AC (multi-phase)440 V
5SN6432-8CP — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
5SN6432-8CP — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)2.1 W

Product details

Siemens SENTRON 5SN6432-8CP — 4-Pole MCB, C-Curve

The 4-pole construction (all poles switched and protected) makes this unit suitable for three-phase plus neutral circuits — common in distribution boards feeding mixed single-phase and three-phase loads. For DC circuits, the maximum rated voltage is 72 V — a figure to verify if the breaker is used in a DC distribution sub-panel.

Height is 90 mm. This matches the standard SENTRON 5SN series envelope, so it drops into existing distribution boards without re-spacing the DIN rail or altering gland-plate clearance. The terminal accepts solid conductors up to 35 mm², sufficient for most sub-feed or feeder circuits in a commercial panel.

Thermal and Lifecycle Considerations

Per-pole power dissipation is 2.1 W at rated current in the hot operating state. For a 4-pole breaker under full load, that totals 8.4 W of heat to vent inside the enclosure — a factor when calculating cabinet temperature rise and de-rating adjacent devices.

Frequently asked questions

What are the breaking capacity ratings for 5SN6432-8CP?

Per EN 60898, the rated breaking capacity is 6 kA. Per IEC 60947-2, the rated breaking capacity is 15 kA. The higher IEC figure applies when the breaker is installed in an industrial panel with a defined fault-current study.

What is the difference between 5SN6432-8CP and the 3-pole 5SL4363-7?

The 5SN6432-8CP is a 4-pole MCB (72 mm wide, 4 MW units). The 5SL4363-7 is a 3-pole MCB (54 mm wide, 3 MW units). Both share the same 90 mm height, 76 mm depth, and 70 mm installation depth. The 5SL4363-7 carries a higher EN 60898 rating (10 kA) but a lower IEC 60947-2 rating (10 kA). If your panel was laid out for a 3-pole unit, the 4-pole 5SN6432-8CP will not fit without an additional 18 mm of DIN-rail space.

Where can I buy 5SN6432-8CP?

This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position.

MPN
5SN6432-8CP