Siemens 5SY7406-8 SENTRON 4-Pole MCB, D Curve, 6 A
Breaking Capacity & Standards
It also carries a DC rating of 15 kA per IEC 60947-2.
Thermal Derating & Ambient Conditions
The 6 A rating holds at 35 °C ambient. Above that, derate linearly: 5.56 A at 45 °C, 5.41 A at 50 °C, 5.25 A at 55 °C, and 5.09 A at 60 °C. For a panel running warm — say 50 °C internal ambient — the effective continuous current is 5.41 A, not the nameplate 6 A. The operating range spans -40 °C to 75 °C, with humidity limits that step down at higher temperatures (95% RH up to 55 °C, then 55% RH to 70 °C, then 35% RH to 75 °C).
Mounting & Integration
Mounting position is any orientation. Width is 72 mm (4 MW). Touch protection is provided. The unit is sealable for tamper-evident applications. Halogen-free and silicon-free construction supports use in clean environments where outgassing must be minimized.