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Transparent rectangular overload relay with adjustment dial and terminal screws

Schneider Electric

Schneider Electric LRD08 Overload Relay 2.5-4.0 A

SKU CH-2X9Q-YW91K

A differential thermal overload relay with adjustable 2.5 to 4.0 A trip current for TeSys D contactors from 9 to 38 A

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Protects motors from overcurrent damage using differential thermal detection
  • Adjustable trip current from 2.5 to 4.0 amperes calibrated to Class 10A
  • Works with TeSys D contactors rated 9 to 38 amperes for motor starter assembly
  • Certified to multiple international standards including IEC, UL, CSA, CCC, EAC, ATEX and Marine
  • Transparent housing allows visual inspection of relay status

Schneider Electric LRD08 Overload Relay

The Schneider Electric LRD08 is a differential thermal overload relay designed for motor protection in industrial automation. It works with TeSys D contactors rated from 9 to 38 amperes to form a complete motor starter. The unit monitors line current and disconnects power when an overcurrent is detected, helping to prevent damage to motor windings.

Adjustable 2.5 to 4.0 A Trip Range

This relay requires a compatible TeSys D contactor to operate as part of a motor starter assembly. It fits contactors in the 9 through 38 ampere range, integrating directly into the control circuit. The adjustable trip current allows precise calibration for the specific motor load, freeing the installer from selecting multiple fixed-range devices.

Class 10A Calibration

The relay comfortably handles motor loads within the 2.5 to 4.0 ampere adjustment window with a Class 10A trip response. It runs out of range for motors drawing less than 2.5 amperes or more than 4.0 amperes, requiring a different relay model. Multi-standard certification covers IEC, UL, CSA, CCC, EAC, ATEX and Marine approvals for broad compliance.

Highlights

  • Protects motors from overcurrent damage using differential thermal detection
  • Adjustable trip current from 2.5 to 4.0 amperes calibrated to Class 10A
  • Works with TeSys D contactors rated 9 to 38 amperes for motor starter assembly
  • Certified to multiple international standards including IEC, UL, CSA, CCC, EAC, ATEX and Marine
  • Transparent housing allows visual inspection of relay status

Specifications

BrandSCHNEIDER ELECTRIC
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

At what current does the LRD08 trip during sustained overload?

The adjustable trip range is 2.5 A to 4.0 A, calibrated to Class 10A.

How much heat or noise does the relay produce when running continuously?

As a passive thermal device it generates no audible noise and only minimal heat from normal current flow.

Which contactor must I already have for this relay to mount and function?

It fits directly on TeSys D contactors rated from 9 A through 38 A.

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