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Transparent plastic IEC thermal overload relay with screw clamp terminals, direct contactor mount, 30-40 A range

Schneider Electric

Schneider Electric LR2D3555 Overload Relay 30-40 A

SKU CH-WP0A-7CJVP

Thermal overload relay protects motors from 30 A to 40 A with trip class 20 and 1000 V AC rating

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Thermal overload protection for 30–40 A circuits
  • Trip Class 20 limits nuisance tripping
  • 1 NO / 1 NC auxiliary contacts for signalling
  • 1000 V AC rating suits industrial panels
  • Screw-clamp terminals enable direct contactor mounting

Industrial Overload Relay 30-40 A

The Schneider Electric LR2D3555 is a thermal overload relay designed for industrial motor protection. It suits electrical engineers and maintenance teams managing three-phase circuits up to 1000V AC. The unit mounts directly to compatible TeSys Deca contactors for streamlined panel integration.

Thermal Trip Class 20 Operation

This relay uses a thermal protection mechanism with Trip Class 20 characteristics to guard against sustained overcurrent. The adjustable current setting ranges from 30 A to 40 A, allowing precise calibration to the motor load. Auxiliary contacts rated 1NO/1NC provide status signalling for control circuits.

Direct Contactor Mounting With Screw Terminals

Direct mounting onto the contactor reduces wiring time and panel space requirements. Screw clamp terminals ensure secure conductor connections for both power and control wiring. The transparent housing allows visual inspection of the reset mechanism, which supports both automatic and manual reset modes.

Highlights

  • Thermal overload protection for 30–40 A circuits
  • Trip Class 20 limits nuisance tripping
  • 1 NO / 1 NC auxiliary contacts for signalling
  • 1000 V AC rating suits industrial panels
  • Screw-clamp terminals enable direct contactor mounting

Specifications

BrandSCHNEIDER ELECTRIC
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

How do I mount the LR2D3555 directly to a TeSys Deca contactor and which terminals get the screw-clamp connections?

The relay mounts directly onto a compatible TeSys Deca contactor. Power and control wiring uses screw-clamp terminals; tighten each to the specified torque so the 30-40 A setting remains accurate.

Will the thermal trip mechanism need periodic recalibration or replacement after repeated overloads?

The thermal element is factory-calibrated for Trip Class 20 and is not user-adjustable. After a trip, allow cooling then reset manually or automatically; replace the unit if nuisance tripping persists.

At what continuous current does the 40 A maximum setting become the limiting factor during sustained operation?

The relay trips when current exceeds the 40 A upper setting for the Trip Class 20 time-current curve, protecting the motor from sustained overload.

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