The Siemens 7SR1204-2HA12-1CA0 is an overcurrent relay from the 7SR1204 series, used in protection schemes for distribution feeders, transformers, and motor circuits where phase and earth fault detection is required. It sits in the Circuit Breakers, Fuses & Protection category, subcategory Overcurrent Relays.
This part is at a current lifecycle stage, meaning Siemens continues to manufacture and support it as an active catalog item. It is not subject to a last-time-buy or phase-out notice.
Deployment context for the panel
As an overcurrent relay, the 7SR1204-2HA12-1CA0 mounts in a protection panel or switchgear cubicle, typically on a DIN rail or a panel-mount chassis. It connects to current transformer secondaries and a trip circuit, so verify the CT burden and the auxiliary supply voltage match the relay's rated inputs before wiring.