SQUARE D
SQUARE D LRD12L Overload Relay 5.5-8A 3P Class 20 690V
Thermal overload relay protects motors at 5.5–8 A with Class 20 trip and 690 V AC rating
- Adjustable 5.5–8 A range protects motors precisely
- Class 20 trip timing suits heavy-start loads
- 690 V AC rating fits industrial power systems
- Direct contactor mounting saves panel space
- Auto and manual reset options speed recovery
Relay for Motor Protection
The SQUARE D LRD12L is a thermal overload relay designed to protect three-phase motors from excessive current. It mounts directly onto a compatible TeSys Deca contactor and operates at up to 690V AC. The adjustable setting range runs from 5.5 A to 8 A, and the trip characteristic follows Class 20 timing. This unit suits maintenance engineers and panel builders who need reliable overload protection for industrial motor circuits.
Adjustable Range and Auxiliary Contacts
The relay provides a 5.5 A to 8 A adjustment window so the trip point can be matched to the motor full-load current. A built-in 1NO/1NC auxiliary contact block allows simultaneous signalling and control-circuit interruption when an overload occurs. Screw clamp terminals accept standard wiring without special tools, and the reset function can be configured for either automatic or manual operation depending on the application requirements.
Suits Direct-Contactor Mounting on TeSys Deca
This relay fits panels where a TeSys Deca contactor is already specified and Class 20 thermal protection meets the motor starting profile. It is not intended for applications that require electronic overload functions, a different trip class, or a current setting outside the 5.5 A to 8 A band. Installations needing higher voltage ratings, alternative mounting styles, or communication-enabled protection should evaluate other product families.
Highlights
- Adjustable 5.5–8 A range protects motors precisely
- Class 20 trip timing suits heavy-start loads
- 690 V AC rating fits industrial power systems
- Direct contactor mounting saves panel space
- Auto and manual reset options speed recovery
Specifications
| Brand | SCHNEIDER ELECTRIC |
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Questions about this item
Does the 5.5-8 A thermal element need periodic replacement?
The thermal overload relay is calibrated at the factory and does not require scheduled element replacement; inspect contacts during routine panel maintenance.
What limit is reached first when the relay runs continuously at 8 A?
Continuous operation at the 8 A maximum setting will reach the Class 20 trip curve first, opening the 1NO/1NC auxiliary contacts to protect the motor.
How much heat does the LRD12L dissipate when mounted on a contactor all day?
The IEC-style thermal relay is designed for direct contactor mounting with screw-clamp terminals, and its heat output stays within the enclosure ratings for the 690 V AC maximum voltage.
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