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Siemens 5SY4463-6KK11 — Miniature Circuit Breakers (MCB)

Siemens 5SY4463-6KK11 SENTRON MCB, 4P B-curve 63 A, 10/15 kA

MPN5SY4463-6KK11

Siemens SENTRON 5SY4463-6KK11, 4-pole miniature circuit breaker, B-curve, 63 A rated, 10 kA (EN 60898) / 15 kA (IEC 60947-2), IP20, 72 mm wide, active production.

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

5SY4463-6KK11 — Ratings
ParameterValue
Overvoltage categoryIII
5SY4463-6KK11 — Mechanical
ParameterValue
Width72 mm
Height90 mm
Depth76 mm

Product details

It sits in the SENTRON family, the standard modular protection range for industrial and commercial panel builds. Breaking capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2 — the higher figure applies when the breaker is specified under the industrial standard, giving you a safety margin for fault currents up to 15 kA at the panel's supply side.

The B-curve means the magnetic trip activates at 3–5× rated current — so 189–315 A instantaneous trip. Current derating is published across the ambient range: 63 A at 35 °C, 59.98 A at 40 °C, 58.4 A at 45 °C, 56.83 A at 50 °C, 55.12 A at 55 °C, and 53.42 A at 60 °C. If your panel ambient runs above 40 °C, the 40 °C figure (59.98 A) is the one to use for sizing — not the 35 °C headline. Four poles in a 72 mm wide housing — 4 modular-width units.

Rated for mechanical engineering and industry, snaps onto a DIN rail via quick-assembly system, mountable in any position. Installation depth is 70 mm. IP20 with connected conductors — that's the usual protection for inside a panel. The terminals are combined top and bottom, meaning you can feed from either direction, and the supply cord can enter from any position. Touch protection is built in.

Halogen-free and silicon-free construction, plus sealable — useful for environments where outgassing or tampering is a concern.

MPN
5SY4463-6KK11