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Schneider Electric LUCA05BL control unit, compact relay housing, light grey finish

Schneider Electric

Schneider Electric LUCA05BL Standard Control Unit 1255A 24Vdc

SKU CH-5A6Q-YCK3A

Standard control unit for contactors and starters, 1.25 to 5 A overload range, class 10 trip, three poles, manual reset, 24 Vdc coil

  • Handles motors up to 5 A with 1.25–5 A overload range
  • Trip Class 10 protects against sustained overloads
  • Three-pole design switches all phases simultaneously
  • 24 V DC coil suits low-voltage control circuits
  • Manual reset lets you confirm fault clearance before restart

Standard Control Unit for LUA1C Contactors

The Schneider Electric LUCA05BL is a 24 Vdc control unit designed for use with LUA1C series contactors and starters. It provides overload protection for three-pole motor circuits in industrial and automation environments.

Upgrades from basic overload relays

This unit replaces simple thermal relays by adding a Class 10 trip characteristic and a 1.25 to 5 A adjustable current range. The jump is worth it when motors need faster, repeatable tripping under sustained overload conditions.

Suits panels using 24 Vdc control voltage

It fits builders wiring LUA1C contactors who require manual reset after a trip event. Buyers who need a wider current range or automatic reset functionality should look at alternative control units.

Highlights

  • Handles motors up to 5 A with 1.25–5 A overload range
  • Trip Class 10 protects against sustained overloads
  • Three-pole design switches all phases simultaneously
  • 24 V DC coil suits low-voltage control circuits
  • Manual reset lets you confirm fault clearance before restart

Specifications

BrandSCHNEIDER ELECTRIC

Questions about this item

Will the LUCA05BL fit LUA1C contactors directly?

Yes, it is designed for use with LUA1C series contactors and starters.

How do I wire the 24 Vdc coil and what mistake should I avoid?

Connect 24 Vdc to the coil terminals; the common error is reversing polarity on the DC supply.

When must I replace the overload relay after a trip?

After a Class 10 trip at 1.25–5 A you must press the manual reset; the relay itself does not need replacement unless damaged.

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