Siemens SIRIUS auxiliary switch, 3RT1926-2EJ21, adjustable ON-delay 0.5-10 s, clip-on mounting, 3 A max contact rating.
| Parameter | Value |
|---|---|
| Control supply voltage type | AC/DC |
| Rated value @ 50 Hz | 24 V |
| Parameter | Value |
|---|---|
| Conductor cross-section, solid | 18 ... 14 |
| Conductor cross-section, finely stranded w/ ferrule | 0.5 ... 2.5 m² |
| Mounting method | clip-on |
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60 °C |
| Storage temperature range | -40 ... +85 °C |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 33 mm |
| Height | 46 mm |
| Depth | 73 mm |
The 3RT1926-2EJ21: The delay is set via a potentiometer on the face, covering 0.5 to 10 seconds, with a recovery time of 150 ms between cycles. It mounts in any position and fits the standard SIRIUS contactor footprint — no extra DIN rail space needed beyond the contactor itself.
Terminals accept solid wire 18-14 AWG and stranded wire 18-14 AWG, with dual-wire capability for daisy-chaining.
No stock-holding claim; we quote per request.
It clips onto any SIRIUS contactor that accepts the standard auxiliary switch front-mount interface — the same form factor used across the SIRIUS 3RT2 contactor range.
Turn the potentiometer on the front face of the switch. The delay range is 0.5 to 10 seconds, adjustable continuously between those limits. No tools needed.
This specific variant provides an ON-delay make contact only. It does not include an OFF-delay or a break contact function.
The 3RT1926-2EJ21 is the adjustable ON-delay variant. The 3RT1926-2EJ20 is a fixed-delay version — they share the same mechanical footprint and wiring, but the adjustment method differs. Confirm the delay type your circuit requires before substituting.
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