SENTRON 5SY6315-7 — 3-pole MCB, C-curve, dual-rated breaking capacity
The Siemens SENTRON 5SY6315-7 is a 3-pole miniature circuit breaker with C-curve tripping characteristic, designed for branch-circuit protection in industrial control panels and distribution boards. It carries dual breaking-capacity ratings: 6 kA per EN 60898-1 for residential/commercial applications, and 30 kA per IEC 60947-2 for industrial duty — the higher figure is the one that governs fault-current clearance in a plant-floor MCC or sub-distribution board. At DC, it is rated 15 kA per IEC 60947-2, covering 60 V (max 72 V) control circuits. Occupies 3 modular-width units (54 mm) on a DIN rail, with a 76 mm depth that fits standard enclosures. Rated for 400 V AC (440 V max) and 60 V DC. The C-curve (5–10× In) handles moderate inrush from motor starters, contactor coils, and small transformers — typical for mixed loads in a panel where you want magnetic trip above 10× but not the instant-trip of a B-curve.
Breaking capacity and standards — what the dual rating means for your panel
The 6 kA rating under EN 60898-1 is the standard for final circuits in buildings. The 30 kA under IEC 60947-2 is the industrial rating — this is the figure that matters for SCCR coordination in a machine panel or industrial switchboard. A UL 1077 listing at 5 kA (AC) covers North American supplementary-protector applications. The dual rating means this single part number can serve both a European distribution board (EN 60898) and an industrial machine (IEC 60947-2) without a separate high-fault variant. Compared to the 5SY6332-7CC (a 2-pole, higher-current variant), the 5SY6315-7 is the 3-pole choice for three-phase loads. Both share the SENTRON platform, same C-curve, same dual-breaking-capacity architecture, and same 76 mm depth — so a panel laid out for the 5SY6332-7CC footprint will accept the 5SY6315-7 without rewiring the DIN rail or busbar arrangement, provided the pole count and current rating match the circuit design.
Lifecycle and sourcing — active production, quoted to order
Compliance documentation is available: the part carries IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 approvals. It is halogen-free and silicon-free, which matters for clean-room or sensitive-environment installations where outgassing is a concern.
Mounting and integration — DIN-rail, any position, sealable
Snap-on mounting to 35 mm DIN rail via the quick-assembly system. Mounting position is unrestricted — horizontal, vertical, or inverted — which simplifies panel layout when busbar routing forces an unconventional orientation. The sealable design (padlockable toggle) allows lockout/tagout without an external lockout hasp. Combined terminals top and bottom accept busbar or cable entry from any direction. IP20 with connected conductors — suitable for enclosed panel use; not rated for washdown environments. Degree of pollution 3 (conductive pollution or dry non-conductive pollution that becomes conductive) means it is rated for the typical industrial panel environment.