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Siemens 5SY4320-7 — 3-Pole MCB (DIN Rail)

Siemens 5SY4320-7 SENTRON MCB, 3P C-Curve, 10 kA IEC, 20 kA

MPN5SY4320-7
Active

Siemens SENTRON 5SY4320-7 miniature circuit breaker, 3-pole, C-curve, 10 kA (EN 60898) / 20 kA (IEC 60947-2) breaking capacity, 400 V AC, 3 MW.

$27.94Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY4320-7 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY4320-7 — Protection
ParameterValue
Tripping characteristic (curve)C
Breaking capacity per EN 6089810 kA
Breaking capacity per IEC 60947-220 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree3
5SY4320-7 — Electrical
ParameterValue
Rated voltage (AC, multi-phase)440 V
Voltage type (AC/DC)AC
Supply frequency range50/60 Hz
Power loss per pole at rated current (AC, hot)1.7 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY4320-7 — Mechanical
ParameterValue
Modular width units3
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Terminal tightening torque, max.75 °C
Terminal tightening torque, min.-40 °C
Combined terminal, topYes
Combined terminal, bottomYes
Fastening methodQuick assembly system
SealableYes
Accepts supplementary devicesYes
5SY4320-7 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
Vibration resistance (IEC 60068-2-6)±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz

Product details

Rated for 400 V AC (440 V max multi-phase) and 60 V DC (72 V max), it handles the voltage levels common in industrial motor control centers and machine tool panels.

Breaking capacity — the number that matters for fault clearance

The 5SY4320-7 carries a 10 kA breaking capacity per IEC/EN 60898-1 at 400 V AC, and a higher 20 kA per IEC 60947-2 at the same voltage — meaning it safely interrupts fault currents up to 20 kA under the industrial standard.

Certified to IEC/EN 60898-1 and IEC/EN 60947-2, plus UL 1077 and CSA C22.2 No. 235, so it's accepted in both IEC and North American markets.

Physical integration

Fastens via quick-assembly system (snap-on DIN rail), mountable in any position. Sealable to prevent tamper, which is useful for metering or critical circuits.

Frequently asked questions

What are the key breaking capacity ratings?

10 kA per IEC/EN 60898-1 at 400 V AC, 20 kA per IEC 60947-2 at 400 V AC, 15 kA per IEC 60947-2 at 60 V DC, and 5 kA per UL 1077 at 400 V AC.

What is the physical size of the 5SY4320-7?

Width 54 mm (3 modular units), depth 76 mm, height 90 mm, installation depth 70 mm.

What standards does it comply with?

IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, and CSA C22.2 No. 235. It is halogen-free and silicon-free.

Will the 5SY4320-7 drop into a panel designed for the 5SL4363-7?

Both are 3-pole MCBs on a 54 mm (3 MW) footprint, so the mechanical fit is the same. The 5SY4320-7 carries a C-curve, while the 5SL4363-7 is a B-curve — verify the trip characteristic matches the load. Breaking capacities differ; the 5SY4320-7 offers 10/20 kA (IEC) vs the 5SL4363-7's 6 kA (EN 60898) — if the panel's fault current exceeds 6 kA, the 5SY4320-7 is the correct choice.

MPN
5SY4320-7