Schneider Electric Thermal Overload Relay 1 NO/1 NC 37-50 A Adjustable Current Range, 50 A Relay Contact Rating, 45 LRD3357

Schneider Electric LRD3357 is a thermal overload relay designed to protect AC motor circuits by sensing excessive current and interrupting power flow. This device features an adjustable current range from 37 to 50 amperes, making it adaptable to various motor specifications while providing reliable overload protection for motors rated up to 45 kW.

The relay includes 1 normally open and 1 normally closed auxiliary contact, allowing flexible circuit integration. With a contact voltage rating of 690 V AC and a supply voltage range of 600 to 1000 V, it meets demanding voltage requirements for industrial environments.

The ergonomic design incorporates screw terminal connections and an IP20 rating for basic protection against solid objects. Operators benefit from front-facing flag indicators to monitor operational status and lockable covers to prevent unauthorized adjustments.

Reset methods include both automatic and manual options, with convenient blue and red push buttons for resetting after trips or emergency stops. The product mounts directly on contactors or independently on DIN rails, supporting installation versatility.

This relay is engineered for harsh operating conditions, withstanding temperatures from -20°C to 60°C and shock and vibration resistance. Its compact dimensions (236 mm length, 55 mm width, 123 mm depth) enable integration into control panels with limited space. Industrial sectors such as construction, medical technology, and mining benefit from its robust performance and multi-standard approvals including UL, CSA, IEC, and DNV-GL.

Adjustable current range enables precise protection from 37 to 50 amperes. Normally open and normally closed contact configuration (1 NO/1 NC) for versatile connection options. Supports power ratings up to 45 kilowatts, suitable for three-pole AC motor circuits.

Built-in manual and automatic reset methods with lockable cover for secure operation. Rated for voltages up to 690 volts AC contact voltage and supply voltages of 600 and 1000 volts. Designed with front-facing flag indicator for easy status monitoring.

Compact dimensions with 236 mm length, 55 mm width, and 123 mm depth for space-efficient installation. Suitable for industrial applications including construction equipment, medical technology, and mining industries. Compliance with multiple international safety and quality standards including UL, CSA, and IEC.

The Schneider Electric LRD3357 Thermal Overload Relay offers reliable, adjustable motor protection for a variety of industrial environments. Explore our extensive range of relays and contactors for your automation and control equipment needs at EnvMart.