Skip to main content
Siemens 5SY8463-8 — Miniature Circuit Breakers (MCB)

Siemens SENTRON 5SY8463-8 MCB, 4P D-curve, 20 kA IEC

MPN5SY8463-8
Active

Siemens SENTRON 5SY8463-8, 4-pole miniature circuit breaker, D tripping characteristic, 20 kA at 400 V AC (IEC 60947-2), 5 kA UL 1077, 4 MW, IP20, halogen-free, silicon-free.

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

5SY8463-8 — Ratings
ParameterValue
Overvoltage categoryIII
5SY8463-8 — Mechanical
ParameterValue
Width72 mm
Height90 mm
Depth76 mm

Product details

It carries a 20 kA breaking capacity at 400 V AC per IEC 60947-2 and 5 kA per UL 1077, with a DC rating of 15 kA at 60 V. Rated operating voltage is 400 V AC (440 V max multi-phase or single-phase), and DC rated voltage is 60 V (72 V max).

D-curve and breaking capacity — the so-what

The D characteristic means the breaker trips at 10–20× rated current, which suits loads with high starting surges — motor starters, welding equipment, or transformer primaries — without nuisance trips. At DC, the 15 kA rating at 60 V covers common industrial DC bus applications. The 5 kA UL 1077 rating makes it acceptable for UL-listed panels in North American installations.

Snaps onto DIN rail via a quick-assembly system, any mounting position. Depth is 76 mm (70 mm installation depth). Combined terminals on top and bottom simplify wiring. Sealable, halogen-free, silicon-free — meets clean-room and low-smoke requirements. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.

Frequently asked questions

What are the key ratings of the 5SY8463-8?

It is a 4-pole D-curve MCB rated 20 kA at 400 V AC (IEC 60947-2), 15 kA at 60 V DC, and 5 kA UL 1077. Operating temperature range is -40 to 75 °C.

How do I get pricing and availability for the 5SY8463-8?

Submit an RFQ — the part is sourced to order through independent distribution, and current pricing and stock levels are confirmed at quote time.

Will the 5SY8463-8 drop into a panel specified for the 5SY4140-7?

Both are 4-pole SENTRON MCBs on the same DIN-rail footprint, but the 5SY8463-8 uses a D curve while the 5SY4140-7 is a B curve. The D curve allows higher inrush before tripping — verify coordination with the load type before substituting.

What compliance documentation is available for the 5SY8463-8?

It is certified to IEC 60947-2 and UL 1077, halogen-free and silicon-free. RoHS and REACH declarations are typically provided by the manufacturer; request them with the order.

MPN
5SY8463-8