The 3VA9977-0UA10: The relay outputs are rated 6 A at 250 V AC in AC-12 duty (resistive loads) and 3 A at 250 V AC in AC-15 (inductive loads like contactor coils). For DC switching, the AC-12 rating drops to 0.2 A at 250 V DC, and AC-15 (DC-13) is 0.1 A at 250 V DC — so if you're switching a small DC solenoid or a pilot light, keep the current under 0.1 A at 250 V DC or derate accordingly. The semiconductor outputs are not rated for high inrush; they're meant for signaling, not power loads. The module draws a maximum of 0.16 A from the breaker's auxiliary supply and dissipates 4 VA — negligible for panel thermal budgeting, but check that the 3VA's internal power supply can handle the extra draw if you're stacking multiple expansion modules.
Deployment context
Mounts directly on the side of a 3VA breaker — no DIN rail required — and the connection is removable/pluggable, so you can pre-wire the terminal block and snap it on during commissioning.