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Transparent rectangular overload relay with screw terminals and reset button

Schneider Electric

Schneider Electric LRD340L Overload Relay 30-40 A 690 V AC Trip Class 20

SKU CH-GZPW-H0HG0

Protects three-phase motors with thermal overload sensing from 30 to 40 amps at up to 690 volts AC, Trip Class 20, and auto or manual reset

  • Product typeIndustrial Electrical Controls & Automation
  • Product colorTransparent
  • Protects motors from overheating with 30–40 A thermal range
  • Handles 690 V AC for industrial three-phase systems
  • Trip Class 20 gives delayed response for high-inertia loads
  • Auto and manual reset options restore operation quickly
  • Screw-clamp terminals ensure secure wiring on TeSys Deca contactors

Overload Relay 30-40 A Trip Class 20

The Schneider Electric LRD340L is a thermal overload relay designed for motor protection in industrial control circuits. It suits panel builders and maintenance engineers who need reliable overload detection for three-phase loads. The adjustable range covers 30 A minimum to 40 A maximum current settings. Trip Class 20 provides a standard response profile for general applications.

Direct Contactor Mounting Screw Clamp Terminals

The unit mounts directly onto compatible TeSys Deca contactors, reducing panel space and wiring time. Screw clamp terminals accept cable connections without specialised tooling. Transparent housing allows visual inspection of contact status and trip indication. The relay carries a 690 V AC maximum voltage rating across three poles for standard industrial supply voltages.

Auto Manual Reset 1NO/1NC Auxiliary Contacts

Reset operation can be selected as automatic or manual to match safety procedures. Auxiliary contacts provide one normally open and one normally closed circuit for signalling or interlocking. Thermal protection principle requires no external control supply. Compatibility with the TeSys Deca series simplifies integration into existing Schneider Electric motor starter assemblies.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $109.99
Pricier than about 77% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameSCHNEIDER ELECTRIC
Product typeIndustrial Electrical Controls & Automation
Product colorTransparent

Questions about this item

What maximum current does the 690 V AC rating cap on this LRD340L relay?

The relay handles up to 40 A at 690 V AC, with a setting range from 30 A to 40 A.

What contactor mounting style does the LRD340L require?

It mounts directly to a compatible TeSys Deca contactor using the direct-to-contactor mounting style.

How do you wire the LRD340L and which reset step is often missed?

Connect the three poles via the screw clamp terminals, set the dial between 30 A and 40 A, then select auto or manual reset; forgetting to choose the reset mode leaves the relay in an undefined state.

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