Siemens SENTRON 5SY7516-7CC — C-curve 16 A MCB, 1P+N, 25 kA IEC
The Siemens SENTRON 5SY7516-7CC is a C-curve miniature circuit breaker rated 16 A at 35 °C, with a 25 kA interrupting capacity per IEC 60947-2 and a 5 kA rating per UL 1077 / CSA C22.2 No. 235. The 2-pole design switches both line and neutral (1P+N), with the neutral pole switched.
Temperature derating and coordination
At 40 °C ambient the 16 A rating derates to 14.83 A; at 50 °C it drops to 13.55 A. This matters for densely packed panels where internal temperature rise is unavoidable — the breaker's thermal-magnetic trip element responds to ambient heat, so the effective continuous current is lower than the nameplate. Pollution degree 3 (conductive pollution) and overvoltage category III (fixed installation) are standard for distribution boards and machine control cabinets.
Environmental and compliance profile
Halogen-free and silicon-free construction, sealable, with IP20 protection when conductors are connected. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. Humidity tolerance: max 95% RH up to 55 °C, derating to 35% RH at 75 °C.