Telemecanique LB1-LD03M Thermal Overload Relay

Description

The Telemecanique LB1-LD03M is a robust 3-pole thermal overload relay designed to provide essential protection for electric motors. It is engineered for direct mounting onto Telemecanique LD1-LD and LD5-LD series contactors, forming a compact and efficient motor starter. This relay safeguards motors against overloads, phase failure, and prolonged starting times, ensuring operational reliability and longevity of your equipment.

Specifications

• Manufacturer: Telemecanique (Schneider Electric)
• Model: LB1-LD03M
• Type: Thermal Overload Relay
• Adjustable Current Range: 0.16A to 0.25A
• Rated Insulation Voltage (Ui): 660V AC
• Number of Poles: 3
• Reset: Manual / Automatic
• Compatibility: LD1-LD and LD5-LD contactors

Label Info

• Model: LB1-LD03M..
• Max Voltage (UL): 600V AC
• Ui: 660V max. a.c.
• Suitable for group fusing: 1600A fuse max.

Application

Ideal for motor protection in a variety of industrial applications, including conveyors, pumps, fans, and machine tools where precise overload protection for small motors is required.

Country of Origin

Made in France.

CO2 Impact

Choosing this pre-owned Telemecanique LB1-LD03M relay prevents the emission of approximately 6.0 kg of CO2 compared to manufacturing a new one. This saving is equivalent to the emissions from driving a standard car for 30 kilometers.

Availability

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

FAQ

What is the adjustable current range for the LB1-LD03M?

The nominal adjustable thermal setting range for this model is from 0.16 Amperes to 0.25 Amperes.

This relay is designed for direct mounting on the legacy Telemecanique LD1-LD and LD5-LD series contactors.

Yes, the LB1-LD series provides differential protection against phase failure, which helps protect the motor from damage if one phase of the power supply is lost.

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Last Update: Friday, March 13, 2026