The Siemens 5SY7315-8 is a SENTRON-series 3-pole miniature circuit breaker with a D tripping characteristic, rated at 1.6 A at 40 °C. It breaks faults up to 15 kA per EN 60898 or 50 kA per IEC 60947-2 — the higher figure applies when the installation follows IEC 60947-2, which is typical for industrial control panels rather than residential distribution boards. The D curve means it tolerates inrush up to 10–20× rated current before tripping, so it's sized for motor or transformer branch circuits where the start-up surge would nuisance-trip a B or C curve.
Thermal derating and environment
Rated 1.6 A at 35 °C, derated to 1.54 A at 40 °C, 1.5 A at 45 °C, 1.47 A at 50 °C, 1.44 A at 55 °C, and 1.4 A at 60 °C. Ambient temperature range -40 °C to 75 °C storage/operation. Humidity tolerance: 95% RH up to 55 °C, 55% RH up to 70 °C, 35% RH up to 75 °C. Pollution degree 3 (conductive pollution or dry non-conductive pollution that becomes conductive due to condensation). Overvoltage category III — suitable for fixed installation downstream of the main distribution board. Sealable, halogen-free, silicon-free.
Sourcing and lifecycle
Listed as current production — no phase-out or last-time-buy notice on this order code. The 5SY7315-8 is sourced through independent distribution channels; availability and current pricing are confirmed at quote time against an RFQ. For volume or scheduled releases, submit a request with target quantity and delivery window.