We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Schneider Electric LUCA12BL relay unit, compact grey housing, manual reset button, three-pole terminals, 24Vdc label

Schneider Electric

Schneider Electric LUCA12BL 3-12A 24Vdc 3P Class 10 Manual Reset

SKU CH-J2BH-5PR88

A 3-pole thermal overload relay for 3 to 12 A motor circuits with Class 10 trip and manual reset, operated from 24 V dc

  • Protects motors with adjustable 3 to 12 A overload range
  • Matches 24 Vdc control circuits for direct integration
  • Trips reliably on sustained overloads with Class 10 response
  • Three-pole design covers all phases in one compact unit
  • Manual reset prevents automatic restart after fault conditions

Schneider Electric LUCA12BL Overload Relay

The Schneider Electric LUCA12BL is a three-pole thermal overload relay designed for motor protection in industrial control circuits. It operates on a 24 Vdc control supply and offers a current adjustment range of 3 to 12 A. The unit conforms to trip class 10 and features a manual reset mechanism. It is intended for use with LUA1C series contactors in starter assemblies.

Replaces older manual-reset overloads

This relay replaces legacy overload units that lack class 10 trip characteristics or a 24 Vdc coil option. The upgrade is worth it when an application demands faster thermal response under overload conditions and a low-voltage DC control circuit. The three-pole design matches standard three-phase motor wiring without additional adapters.

Suits panel builders using LUA1C contactors

The device suits panel builders and maintenance teams assembling or servicing motor starters based on the LUA1C contactor series who require class 10 protection and manual reset. It is not suitable for installations that need automatic reset, a different trip class, or a control voltage other than 24 Vdc. Buyers needing a wider current range or higher pole count should look elsewhere.

Highlights

  • Protects motors with adjustable 3 to 12 A overload range
  • Matches 24 Vdc control circuits for direct integration
  • Trips reliably on sustained overloads with Class 10 response
  • Three-pole design covers all phases in one compact unit
  • Manual reset prevents automatic restart after fault conditions

Specifications

BrandSCHNEIDER ELECTRIC

Questions about this item

What mounting arrangement does the LUCA12BL require for LUA1C contactors?

It mounts directly onto LUA1C series contactors without separate DIN-rail hardware, using the contactor’s built-in mounting interface.

Which step is often missed when wiring the 24 Vdc control circuit on this overload relay?

The coil terminals must be energised with 24 Vdc before the manual reset button will latch; applying load current alone will not arm the relay.

After a Class 10 trip at 12 A, what must be done before the relay can protect the circuit again?

Press the blue manual reset button on the front face; the relay will not auto-reset and the contactor stays open until the button is pressed.

More in Relays

Similar items

Same shelf, same checkout — eight coins and a 30-minute rate lock.