The Siemens 3RA2814-1FW10 is an OFF-delay relay from the SIRIUS family, designed to clip directly onto a 3RT2 contactor. It gives you an adjustable delay from 0.05 to 100 seconds after the control voltage is removed, so you can sequence a motor stop or keep a fan running for a set cooldown period. It runs on 24 to 240 V AC/DC, switching up to 3 A. The recovery time between cycles is 150 ms, and after power is applied it needs a minimum ON period of 35 ms before it will recognize a drop-out and start timing. Mounting position is any — it clips onto the contactor the same way regardless of orientation. Basic insulation means it's not for direct line-to-ground isolation; treat it as a control-circuit device.
Siemens 3RA2814-1FW10 SIRIUS Time Delay Relay
MPN3RA2814-1FW10
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Siemens SIRIUS 3RA2814-1FW10 time-delay relay, OFF-delay function, adjustable 0.05 to 100 s, 24-240 V AC/DC, 3 A maximum switching current, clip-on mounting for 3RT2 contactors.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Product designation | Solid-state time-delay auxiliary switch |
| Brand | SIRIUS |
| Reference designation (IEC 81346-2) | K |
| Parameter | Value |
|---|---|
| Rated impulse withstand voltage (Uimp) | 4 kV |
| Parameter | Value |
|---|---|
| Control supply voltage type | AC/DC |
| Parameter | Value |
|---|---|
| Mounting / fastening method | clip-on |
| Mounting position | any (like contactor) |
| Width | 45 mm |
| Height | 38 mm |
| Depth | 74 mm |
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60 °C |
| Storage temperature range | -40 ... +85 °C |
| Transport temperature range | -40 ... +85 °C |
| Pollution degree | 3 |
| Shock resistance (IEC 60068-2-27) | 15g / 11 ms |
Product details
Frequently asked questions
What is the time range of Siemens 3RA2814-1FW10?
The adjustable time delay range is 0.05 to 100 seconds, configured as an OFF-delay.
Can 3RA2814-1FW10 be used with 3RT2 contactors?
Yes, this relay clips directly onto Siemens 3RT2 contactors using the standard clip-on mounting method.
What are the specifications of 3RA2814-1FW10?
It is an OFF-delay relay with 24-240 V AC/DC control voltage, 3 A maximum switching current, adjustable delay 0.05-100 s, clip-on mounting, operating temperature -25 to +60 °C, and dimensions 45 mm wide × 38 mm high × 74 mm deep.
MPN
3RA2814-1FW10