Siemens 5SY7463-7 SENTRON MCB — 4-Pole C-Curve, 15/20 kA
The Siemens 5SY7463-7 is a 4-pole miniature circuit breaker from the SENTRON series, rated for 400 V AC and 60 V DC. It carries a C tripping characteristic, meaning it is designed for moderate inrush currents typical of motor and lighting circuits — the magnetic trip threshold sits between 5 and 10 times rated current, so it rides through startup surges without nuisance tripping on resistive or lightly inductive loads. Breaking capacity is 15 kA per EN 60898 and 20 kA per IEC 60947-2 at 400 V AC; under DC conditions (60 V, max 72 V) it holds 15 kA per IEC 60947-2. For UL 1077 / CSA C22.2 No. 235 applications the rating is 5 kA. These figures tell you the fault-current headroom: at 15 kA it meets the standard domestic/commercial panel requirement; the 20 kA IEC rating gives extra margin in industrial distribution where available fault current may be higher. This is a current-production part (lifecycle stage: current). It is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
Standards, Approvals & Environmental
The 5SY7463-7 is certified to IEC / EN 60898-1 (domestic/commercial MCB standard) and IEC / EN 60947-2 (industrial breaker standard), plus UL 1077 for North American supplementary protection. It carries overvoltage category III (fixed-installation level) and pollution degree 3 (conductive pollution or dry non-conductive pollution that becomes conductive due to condensation — typical in industrial control panels). The breaker is halogen-free and silicon-free, which matters for environments where outgassing can corrode contacts or contaminate optics (clean rooms, medical devices, aerospace assembly). Ambient operating range is -40 °C to 75 °C, with humidity derating: max 95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C. IP20 with connected conductors — the terminals are finger-safe only when wired; the breaker itself is not sealed against moisture ingress. Mount it inside a panel with at least IP54 enclosure if washdown or condensation is present.
Panel Integration & Mounting
Snap-on DIN rail mounting (quick assembly system) with 4 modular width units (72 mm wide). Installation depth is 70 mm; overall depth including terminals is 76 mm. Combined terminal top and bottom — line and load can enter from either direction, simplifying busbar routing in a crowded enclosure. Mounting position is any — the breaker operates correctly upright, sideways, or inverted. The neutral conductor is not switched (4-pole but all poles are phase poles; use a separate neutral bar if neutral isolation is required). Sealable option available for tamper-proofing in metering or critical circuits. Energy limitation class 3 means the breaker limits let-through energy to the lowest level per IEC 60898 — best selectivity with downstream devices and reduced arc-flash hazard on the load side.