SIEMENS
SIEMENS 3RH21311BB40 control relay 3NO/1NC 24V DC 10 A
IEC control relay with 3NO/1NC contacts, 24 V DC coil, and 10 A rating
- IEC-standard relay for reliable industrial control
- 3NO/1NC contact form switches multiple circuits
- 24 V DC coil suits low-voltage panels
- 10 A rating at 24 V handles power loads
- DIN-rail and surface mount simplifies installation
Industrial control relay for automation panels
This SIEMENS IEC control relay provides 3NO/1NC contacts rated at 10 A for 24 V DC circuits. The coil operates on 24 V DC with a power consumption of 4 W. It mounts on DIN rail or surface brackets and carries an IP20 rating. The S00 frame size matches the 3RH21 series footprint.
Suits panels switching small DC loads up to 10 A
Engineers wiring 24 V DC control circuits with screw terminals will find the contact ratings and coil voltage a direct fit. Buyers who need higher DC voltage breaking capacity or AC coil operation should look at other relay families. The fixed 3NO/1NC contact arrangement also limits use where different pole counts are required.
Coil voltage 24 V DC decides compatibility
The 24 V DC coil voltage is the single specification that determines whether this relay works in a given control circuit. Matching the coil supply to this value is essential before purchase. All other ratings follow from this core parameter.
Highlights
- IEC-standard relay for reliable industrial control
- 3NO/1NC contact form switches multiple circuits
- 24 V DC coil suits low-voltage panels
- 10 A rating at 24 V handles power loads
- DIN-rail and surface mount simplifies installation
Specifications
| Brand | SIEMENS |
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Questions about this item
What does the 10 A rating mean when the relay is controlling a 24 V DC load?
At 24 V DC the contacts are rated for the full 10 A, so a 10 A resistive load can be switched directly.
What does the 24 V DC coil voltage imply for the control circuit?
The coil requires a 24 V DC supply and draws 4 W, so the control circuit must provide that voltage and power level.
How is the relay mounted and wired in the panel?
It mounts on a DIN rail or can be surface-mounted, and all connections are made with screw terminals.
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