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Siemens 5SY4363-8CC11 — Miniature Circuit Breakers (MCB)

Siemens SENTRON 5SY4363-8CC11 MCB, 3P D 63A 10kA, Railway

MPN5SY4363-8CC11

Siemens SENTRON 5SY4363-8CC11, miniature circuit breaker, 3-pole, D tripping characteristic, 63 A rated current, 10 kA breaking capacity per EN 60898 at 400 V AC, for railway applications.

Siemens 5SY4363-8CC11 datasheet (PDF)
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

5SY4363-8CC11 — Ratings
ParameterValue
Overvoltage categoryIII
5SY4363-8CC11 — Mechanical
ParameterValue
Width54 mm
Height90 mm
Depth76 mm

Product details

Physical integration and mounting

Occupies 3 modular width units (54 mm wide) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm. The quick-assembly fastening system and combined top/bottom terminals simplify daisy-chaining in a panel.

Thermal and electrical constraints

Power loss is 4.9 W per pole in hot operating state — total 14.7 W for the three poles. In a sealed enclosure with other breakers, that heat adds up; leave adequate ventilation or derate per the surrounding-temperature influence curve (max 95% RH at 55 °C, dropping to 35% at 75 °C).

Frequently asked questions

What is the breaking capacity of 5SY4363-8CC11?

The breaking capacity is 10 kA per EN 60898 at 400 V AC, with a multi-phase rating of 440 V AC. The D-curve trips between 10× and 20× In, which handles high-inrush loads typical in railway auxiliary systems.

Will 5SY4363-8CC11 drop into a panel specified around 5SY6332-7CC?

Both are 3-pole SENTRON MCBs on a 54 mm (3-module) DIN-rail footprint, so the mechanical fit is the same. The difference is the rating: 5SY4363-8CC11 is a 63 A D-curve, while 5SY6332-7CC is a different current/curve combination. Check the specific load and selectivity requirements before substituting.

Where can I buy 5SY4363-8CC11 and how is it quoted?

This part is 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 offer.

MPN
5SY4363-8CC11