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Siemens 5SY6306-8 — 3-Pole MCB (DIN Rail)

Siemens 5SY6306-8 SENTRON MCB, 6 A, D Curve, 3-Pole, 400 V A

MPN5SY6306-8

Siemens SENTRON 5SY6306-8, miniature circuit breaker, 3-pole, D characteristic, 6 A rated current, 400 V AC, 30 kA (IEC 60947-2).

$41.88Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY6306-8 — Identification
ParameterValue
Design / model code5SY6
Brand nameSENTRON
Number of poles3
Suitability for operationMechanical engineering / industry
5SY6306-8 — Protection
ParameterValue
Tripping characteristic (curve)D
Breaking capacity per EN 608986 kA
Breaking capacity per IEC 60947-230 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Pollution degree3
5SY6306-8 — Electrical
ParameterValue
Rated current (AC)400 V
Rated voltage (AC, multi-phase)440 V
Rated frequency50/60 Hz
5SY6306-8 — Mechanical
ParameterValue
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
SealableYes
5SY6306-8 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C

Product details

At 6 A rated, it's sized for smaller branch circuits in industrial control panels. Breaking capacity is 30 kA per IEC 60947-2, 6 kA per EN 60898, and 5 kA per UL 1077 / CSA C22.2 No. 235. For DC circuits, it's rated 15 kA at 72 V DC per IEC 60947-2.

Mounts via quick assembly system (snap-on DIN rail), 3 width units at 54 mm wide, 90 mm tall, 76 mm deep with 70 mm installation depth. Any mounting position allowed. Sealable, halogen-free, silicon-free. Touch protection integrated. Ambient temperature derating applies: max 95% humidity to 55 °C, tapering to 35% at 75 °C. The breaker itself is rated for -40 °C to 75 °C storage and operating range.

Suitability for operation listed as mechanical engineering and industry — covers general machine building, conveyor systems, pump panels, and similar industrial branch protection.

Frequently asked questions

What is the breaking capacity of 5SY6306-8?

30 kA per IEC 60947-2 at 400 V AC, 6 kA per EN 60898, 5 kA per UL 1077 / CSA C22.2 No. 235, and 15 kA at 72 V DC per IEC 60947-2.

What does the D tripping characteristic mean for this MCB?

The D curve allows 10–20 times rated current (60–120 A) for short-duration inrush, making it suitable for motor, transformer, and lighting loads without nuisance tripping on startup.

Where can I buy 5SY6306-8?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
5SY6306-8