SIEMENS
SIEMENS 3RH21311AN20 IEC control relay 3NO/1NC 220V AC 10A
IEC control relay with 3NO/1NC contacts rated 10 A at 240 V AC, 220 V AC coil, screw terminals, DIN-rail mount
- IEC standard relay fits S00 frame DIN rail and surface mounting
- 10 A AC contact rating at 240 V handles typical control circuits
- 220 V AC coil with 5.7 VA consumption suits common panel voltages
- 3NO plus 1NC contact form gives flexible switching logic
- IP20 enclosure protects contacts from finger contact and solid objects
IEC Control Relay 3NO/1NC 220V AC
This SIEMENS IEC control relay provides three normally open and one normally closed contact for circuit switching. It operates on a 220V AC coil and carries a 10A current rating. The unit mounts on DIN rail or surface and uses screw terminals for electrical connection. It suits industrial control panels requiring reliable contact logic.
Contact Ratings and Coil Limits
AC contact ratings reach 10A at 240V, 3A at 400V, 2A at 500V and 1A at 690V. DC ratings are 10A at 24V, 3A at 120V, 1A at 240V, 0.3A at 440V and 0.15A at 600V. The coil draws 5.7 VA at 220V AC. IP20 rating restricts use to protected enclosures. The S00 frame size defines the physical footprint.
Screw Terminal DIN Rail Installation
Screw terminals accept solid or stranded wire for secure connections. The relay clips onto standard DIN rail or fastens with screws for surface mounting. Common issues include loose terminal screws causing intermittent contact and exceeding the IP20 rating in damp environments. Coil voltage must match the control circuit exactly to prevent failure.
Highlights
- IEC standard relay fits S00 frame DIN rail and surface mounting
- 10 A AC contact rating at 240 V handles typical control circuits
- 220 V AC coil with 5.7 VA consumption suits common panel voltages
- 3NO plus 1NC contact form gives flexible switching logic
- IP20 enclosure protects contacts from finger contact and solid objects
Specifications
| Brand | SIEMENS |
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Questions about this item
Should I pick the 3NO/1NC version or look for a different contact form?
This relay has three normally-open and one normally-closed contact. Choose it when your control circuit needs three make paths and one break path; a different contact form would change the logic.
What does the 10 A rating mean once the relay is installed in a panel?
The contacts can switch up to 10 A at 24 V DC or 240 V AC. At higher voltages the rating drops: 3 A at 120 V DC, 1 A at 240 V DC, 0.3 A at 440 V DC and 0.15 A at 600 V DC.
The coil runs on 220 V AC — what standard does that follow and what does it limit?
The coil is rated for 220 V AC and draws 5.7 VA. It conforms to IEC relay standards and fits the S00 frame size, so it mounts on standard DIN rail or surface brackets.
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