Telemecanique Thermal Overload Relay 1.0-1.8A LB1-LC03M06

Description

This is a thermal-magnetic overload relay, model LB1-LC03M06, from Telemecanique (now part of Schneider Electric). Designed for direct mounting on LD and LC series contactors, it provides robust motor protection. This component safeguards against overloads and short circuits, crucial for the longevity of your industrial machinery.

Specifications

• Brand: Telemecanique
• Type: Thermal Overload Relay
• Model: LB1-LC03M06
• Adjustable Current Range: 1.0 - 1.8 A
• Rated Insulation Voltage (Ui): 660V AC
• Poles: 3-Pole

Label Info

• For use only with starters LD, LC
• Suitable for group fusing, 1600 A fuse max.
• LISTED 170 M IND. CONT. EQ.

Application

Ideal for protecting small AC motors in applications such as pumps, fans, conveyors, and other machinery where reliable overload and short-circuit protection is required.

Country of Origin

Made in France.

CO2 Impact

By purchasing this refurbished item, you are saving approximately 12 kg of CO2 emissions compared to a new production. This is equivalent to the CO2 absorbed by a mature tree in over a year.

Availability

This is an obsolete item, but available from our stock. Order now from PLC2Day for expert support and fast delivery.

FAQ

What is the difference between the 'I>' dial and the '(A)' dial on this LB1-LC03M06?

The '(A)' dial sets the thermal overload trip current, adjustable from 1.0 to 1.8 Amps, to match the motor's full load current. The 'I>' dial sets the magnetic (short-circuit) trip current as a multiple of the set thermal current, providing instantaneous protection against high fault currents.

Can this overload relay be used as a standalone device?

No, the LB1-LC03M06 is designed for direct mounting onto a compatible Telemecanique LD or LC series contactor. It does not have its own main power terminals and relies on the contactor for connection to the circuit.

Is this model compatible with modern Schneider Electric TeSys contactors?

No, this is an obsolete model from the pre-TeSys era. It is mechanically and electrically designed for the older LD/LC series contactors and is not directly compatible with modern TeSys D or TeSys K contactors without potential custom mounting or wiring, which is not recommended.

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Last Update: Friday, March 13, 2026