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Siemens 5SY8320-7 — 3-Pole MCB (DIN Rail)

Siemens 5SY8320-7 SENTRON MCB, 3P C-curve, 30 kA IEC

MPN5SY8320-7
Active

Siemens SENTRON 5SY8320-7, 3-pole miniature circuit breaker, C-curve, 30 kA IEC 60947-2, 5 kA UL 1077, 400 V AC, 3 MW units, IP20.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY8320-7 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY8320-7 — Protection
ParameterValue
Tripping characteristic (curve)C
Breaking capacity per IEC 60947-230 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Pollution degree3
5SY8320-7 — 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
5SY8320-7 — 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
5SY8320-7 — 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

Siemens 5SY8320-7 SENTRON MCB — C-curve, 30 kA, active production

The Siemens 5SY8320-7 is a 3-pole SENTRON miniature circuit breaker with C-curve tripping characteristic, rated 30 kA at 400 V AC per IEC 60947-2 and 5 kA per UL 1077. It also delivers 15 kA at 60 V DC (IEC 60947-2). The dual IEC/UL rating means it fits both European and North American installations without a separate UL-listed device. It mounts in any position and accepts top or bottom supply — flexible for tight panel layouts.

Lifecycle and sourcing — active, quoted to order

The part carries IEC/EN 60947-2 and UL 1077 approvals, is halogen-free and silicon-free, and is sealable for tamper-proof installations. Vibration resistance per IEC 60068-2-6 (±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz) and a mechanical life of 10 000 operating cycles typical.

Integration — DIN-rail, 3 MW, any position

Three modular width units (54 mm) leave room for adjacent devices. The neutral conductor is not switched — this is a 3-pole line-side breaker only. Temperature derating applies: max 95% RH at 55 °C, 55% RH at 70 °C, 35% RH at 75 °C.

Frequently asked questions

What is the breaking capacity of 5SY8320-7?

30 kA at 400 V AC per IEC 60947-2, 15 kA at 60 V DC per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No. 235.

What compliance documentation does Siemens provide for 5SY8320-7?

The breaker is certified to IEC/EN 60947-2 and UL 1077. It is halogen-free and silicon-free, and rated for pollution degree 3 and overvoltage category III.

Where can I buy 5SY8320-7 and how is it quoted?

The 5SY8320-7 is sourced through our independent distribution network and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time.

Will 5SY8320-7 drop into a panel specified for 5SY4304-7CV without rewiring?

Both are 3-pole SENTRON MCBs on a 54 mm footprint (3 MW), so the mechanical fit is identical. However, the 5SY8320-7 carries a C-curve and higher breaking capacity (30 kA IEC vs the 5SY4304-7CV's ratings), so verify the tripping characteristic and fault level match the panel design before swapping.

MPN
5SY8320-7