RCD for panel builders — Type A, 80 A, 4-pole
The Siemens 5SM1347-6BA is a 4-pole residual current protective device (FI protector) rated 80 A at 400 V, with a 30 mA trip threshold and Type A sensitivity. The Type A designation means it detects pulsating DC residual currents in addition to sinusoidal AC — a requirement for circuits with single-phase rectifiers, switched-mode power supplies, or VFDs that generate pulsed DC fault currents. The 30 mA rating covers personnel protection (indirect contact) per IEC 60364.
Lifecycle stage is listed as current — meaning Siemens still produces this order code. No phase-out or last-time-buy notice is on record.