TELEMECANIQUE LB1-LC03M10

Telemecanique 3-Pole Thermal Overload Relay

Description

The Telemecanique LB1-LC03M10 is a high-quality thermal overload relay designed to provide reliable protection for three-phase AC motors. It guards against overloads, phase failures, and extended starting times. Featuring a differential mechanism, it is sensitive to phase loss, ensuring comprehensive motor safety. This relay is engineered for direct mounting on Telemecanique LC1-D series contactors, forming a seamless and compact motor starter assembly. Its proven design ensures long-term operational reliability in demanding industrial environments. Order now from spareparts2day for expert support and fast delivery.

Specifications

• Manufacturer: Telemecanique (Schneider Electric)
• Type: LB1-LC03M10
• Product Type: Thermal Overload Relay
• Adjustable Current Range: 4.0 to 6.3 Amps
• Rated Insulation Voltage (Ui): 660V AC max.
• Poles: 3
• Trip Class: Class 10
• Mounting Style: Direct to Contactor

Label Info

• Ui: 660V a.c. max
• SP: 600V a.c. max
• Suitable for group fusing 1600 A fuse max.

Application

Ideal for motor protection in applications such as conveyors, pumps, fans, and other industrial machinery where reliable overload protection is critical.

Country of Origin

Made in France.

CO2 Impact

By purchasing this pre-owned item, you are contributing to a circular economy and helping to avoid approximately 6.0 kg of CO2 emissions that would be generated by the production of a new unit.

Availability

This item is a used, tested product in good working condition. Availability is limited. Please contact us for current stock levels.

FAQ

What contactors is the LB1-LC03M10 compatible with?

This thermal overload relay is designed for direct mounting on Telemecanique (now Schneider Electric) LC1-D series contactors, specifically models like LC1-D09, LC1-D12, and LC1-D18.

What is the trip class of this relay?

The ‘M10’ suffix in the model number typically indicates a Trip Class 10 rating. This means it will trip within 10 seconds at 7.2 times the set current, which is suitable for standard motor starting conditions.

How do I correctly set the current on the LB1-LC03M10?

The current is set using the blue dial on the front. You should set the dial to match the Full Load Amperage (FLA) listed on the motor’s nameplate. The adjustable range for this model is from 4 to 6.3 Amps.

Last Update: Friday, March 13, 2026

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