Part identity and function
The Siemens 3RH1122-1AP00-0AA6 is a SIRIUS auxiliary contactor in size S00, designed for switching control and signaling circuits rather than main motor loads. It carries two normally open (NO) instantaneous contacts with no delayed, leading, or lagging switching — the contact set is straightforward: two make contacts that close when the coil picks up.
Key ratings and what they mean for fit
Rated operational current at AC-12 is 10 A maximum, and at 24 V the contact rating is also 10 A — that's the resistive-load ceiling for the contacts. At higher voltages the current capability drops per the switching curve: 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. For a controls integrator, the 10 A AC-12 figure means this contactor can handle the inrush of a bank of contactor coils or a small control transformer, but not a motor load directly — that's what the 3RT power contactor series is for. Mechanical service life is rated at 30,000,000 operating cycles typical.
Mounting and integration
Mounting is by screw or snap-on onto a DIN rail — the 45 mm width and 57.5 mm height fit the S00 footprint. Solid wire capacity is specified as 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm² — that's the cross-section range the screw terminals accept. For a panel wireman, the 4 mm² upper limit means you can land a 12 AWG solid conductor comfortably; the 0.5 mm² lower limit covers fine control wiring.
Environmental and protection ratings
Front protection is IP20 — finger-safe but not sealed against moisture or dust ingress. Pollution degree 3 (conductive pollution or dry non-conductive pollution that becomes conductive due to condensation) means this contactor is intended for conventional industrial control panels, not clean-room or sealed environments. Operating temperature range is -25 to +60 °C; storage and transport range is -55 to +80 °C. Shock resistance is 10g / 5 ms and 5g / 10 ms, which covers most industrial vibration profiles. Maximum operating altitude is 2,000 m without derating. The rated control supply voltage at 50 Hz is 0.8 to 1.1 times nominal; at 60 Hz it is 0.85 to 1.1 times nominal.
Lifecycle and sourcing
The lifecycle stage for the 3RH1122-1AP00-0AA6 is listed as current production — this is an active catalog item from Siemens, not a phase-out or obsolete part. No successor order code is recorded because none is needed. For a category sourcing manager freezing a BOM, this part is a standard-line item with no imminent PCN risk.