Breaking capacity — what the dual rating means
This breaker carries two breaking ratings: 6 kA per EN 60898-1 and 15 kA per IEC 60947-2 / UL 1077. The 15 kA rating gives headroom for higher fault-current locations without cascading upstream.
The 15 A rating is at 35 °C. At 40 °C the continuous current drops to 14.28 A; at 45 °C it's 13.9 A; at 50 °C it's 13.53 A; at 55 °C it's 13.12 A. If your panel ambient runs at 50 °C, size the load at 13.5 A — not the 15 A nameplate. The breaker also handles humidity up to 95% at 55 °C, derating to 35% at 75 °C.
Depth is 76 mm, installation depth 70 mm, width 54 mm (3 MW), height 90 mm. Pollution degree 3 (conductive or dry non-conductive pollution), overvoltage category III. Mount in any position. Sealable for tamper-proof applications. Halogen-free and silicon-free construction.