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Schneider Electric LRD3359 overload relay transparent housing screw terminals

Schneider Electric

Schneider Electric LRD3359 Overload Relay 48-65A 1NO/1NC

SKU CH-TY4F-HWKQN

Protects 3-pole contactors with a 48–65 A thermal overload range, 10 A trip class and screw-clamp terminals

  • TypeIndustrial Electrical Controls & Automation
  • ColorTransparent
  • Protects motors from 48 A to 65 A overloads with Trip Class 10A response
  • 1NO/1NC auxiliary contacts signal trip status for control-circuit integration
  • Direct contactor mounting simplifies panel assembly and saves space
  • Screw-clamp terminals provide secure wiring for 1000 V AC applications
  • Manual reset lets operators confirm fault clearance before restart

Industrial Overload Relay 48-65A

The Schneider Electric LRD3359 is a thermal overload relay designed for motor protection in industrial control panels. It provides adjustable current monitoring between 48 A and 65 A with a 1NO/1NC auxiliary contact for signalling or interlocking. The unit mounts directly onto compatible TeSys Deca contactors using screw clamp terminals.

Trip Class 10A 1000V AC Limits

This relay operates at Trip Class 10A, meaning it will trip within a defined time under overload conditions at 1000 V AC maximum. The three-pole design protects all phases simultaneously. The fixed trip class and current range set the protection boundaries; it cannot be reconfigured for faster or slower response times or for voltages above the rated maximum.

Direct Contactor Mounting Manual Reset

Installation is completed by mounting the relay directly onto a matching TeSys Deca contactor and tightening the screw clamp terminals. The manual reset button must be pressed after a trip event before the motor can restart. Misalignment during mounting or loose terminal screws are the most common issues that prevent proper operation.

Highlights

  • Protects motors from 48 A to 65 A overloads with Trip Class 10A response
  • 1NO/1NC auxiliary contacts signal trip status for control-circuit integration
  • Direct contactor mounting simplifies panel assembly and saves space
  • Screw-clamp terminals provide secure wiring for 1000 V AC applications
  • Manual reset lets operators confirm fault clearance before restart

Specifications

BrandSCHNEIDER ELECTRIC
TypeIndustrial Electrical Controls & Automation
ColorTransparent

Questions about this item

Should I choose the 48 A or 65 A setting for my motor?

Select the setting that matches the motor full-load current; the relay adjusts continuously from 48 A to 65 A.

What does Trip Class 10A mean once the relay is installed?

Trip Class 10A indicates the relay trips within the standard Class 10 time-current curve at the set current.

How does the 1000 V AC rating limit real-world use?

The 1000 V AC maximum voltage rating defines the highest system voltage the relay can safely protect.

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