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Siemens 5SY6306-8 — Miniature Circuit Breakers (MCB)

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
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SY6306-8 — Ratings
ParameterValue
Overvoltage categoryIII
5SY6306-8 — Mechanical
ParameterValue
Width54 mm
Height90 mm
Depth76 mm

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