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Siemens 5SY6320-6 — 3-Pole MCB (DIN Rail)

Siemens 5SY6320-6 SENTRON MCB, 3P B-Curve, 6kA IEC, 15kA IEC

MPN5SY6320-6
Active

Siemens SENTRON 5SY6320-6, 3-pole miniature circuit breaker, B-curve, 6 kA (IEC 60898-1) / 15 kA (IEC 60947-2), 400 V AC, 3 MW units, IP20.

$27.94Ref. price · indicative, final on quote
Siemens 5SY6320-6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY6320-6 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY6320-6 — Protection
ParameterValue
Tripping characteristic (curve)B
Breaking capacity per EN 608986 kA
Breaking capacity per IEC 60947-215 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree3
5SY6320-6 — 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)2.2 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY6320-6 — 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
5SY6320-6 — 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

The DC rating matches the 15 kA figure at up to 72 V DC, so it works on DC control buses as well. Rated 400 V AC phase-to-phase, 440 V max for single- or multi-phase operation.

Mounting position any — no derating for horizontal or vertical orientation. Terminal design accepts top and bottom combined terminals; neutral conductor switching is not built in (no switched neutral pole). Pollution degree 3, overvoltage category III — standard for fixed-installation distribution boards.

Certified to IEC/EN 60898-1 and IEC/EN 60947-2, plus UL 1077 and CSA C22.2 No. 235. The UL 1077 rating is 5 kA — that's the supplementary-protector limit for North American panels where the MCB is not the sole branch-circuit overcurrent device. Halogen-free and silicon-free construction, sealable for lockout/tagout.

Frequently asked questions

What is the breaking capacity of 5SY6320-6?

6 kA per IEC/EN 60898-1, 15 kA per IEC/EN 60947-2, and 15 kA at DC per IEC 60947-2 (up to 72 V DC). Under UL 1077 it is rated 5 kA.

What is the closest functional second-source to 5SY6320-6?

The 5SY4140-7 is a 1-pole B-curve MCB from the same SENTRON family, but it is single-pole only. For a 3-pole replacement, a 3-pole variant from the 5SY4 series (e.g., 5SY4116-7CV or 5SY4101-7CV) would match the form factor and trip curve, though the breaking capacity and current rating may differ — verify the specific rating against your BOM before substituting.

Where can I buy 5SY6320-6 and get current pricing?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

MPN
5SY6320-6