SIEMENS
SIEMENS 3RH21221AP60 control relay 2NO/2NC 220/240V AC 10A
IEC control relay with 2NO/2NC contacts, 220/240 V AC coil, 10 A rating, screw terminals and DIN-rail or surface mounting
- IEC-compliant relay for standardised panel builds
- 2 NO / 2 NC contacts handle diverse control circuits
- 220/240 V AC coil suits common mains supplies
- 10 A AC rating at 240 V drives loads directly
- Screw terminals on DIN-rail frame simplify installation
IEC Control Relay for Industrial Switching
The SIEMENS 3RH21221AP60 is an IEC control relay built for DIN rail or surface mounting in control panels. It provides 2 normally open and 2 normally closed contacts rated at 10 A for AC loads. The coil operates on 220/240 V AC with a power consumption of 5.7 VA. An IP20 rating protects terminals against finger contact. This unit suits electricians and panel builders wiring motor starters, lighting circuits or safety interlocks.
Replaces older IEC relays with lower contact ratings
Upgrading makes sense when existing relays cannot handle 10 A at 240 V AC or 1 A at 690 V AC. The 2NO/2NC configuration also consolidates two separate single-pole relays into one S00 frame. The jump is worth it when a project demands higher AC breaking capacity or when standardising on the 3RH21 series for maintenance simplicity. Buyers needing DC switching above 1 A at 240 V or 3 A at 120 V should look elsewhere.
Screw-terminal wiring
Connections use screw terminals that accept solid or stranded conductors within the terminal capacity. The coil is fixed at 220/240 V AC, so the relay cannot be used on 120 V or 24 V control circuits without a separate transformer. DC load ratings drop sharply: 0.15 A at 600 V, 0.3 A at 440 V and 1 A at 240 V. The IP20 enclosure requires an additional cabinet or cover for wet or dusty environments.
Highlights
- IEC-compliant relay for standardised panel builds
- 2 NO / 2 NC contacts handle diverse control circuits
- 220/240 V AC coil suits common mains supplies
- 10 A AC rating at 240 V drives loads directly
- Screw terminals on DIN-rail frame simplify installation
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
Will the 10 A relay with screw terminals fit on a DIN rail or a flat panel?
The relay mounts on DIN rail and surface using the S00 frame.
Which terminals do I wire for the 220/240 V AC coil and the 2NO/2NC contacts?
All connections use screw terminals; the coil takes 220/240 V AC and the four contacts are rated 10 A at 240 V AC.
What should I check periodically on the IP20 rated relay?
Verify screw terminal tightness and inspect contact tips for wear; the coil draws 5.7 VA during operation.
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