Schneider LT3SA00MW | PTC probe relay TeSys – LT3 with automatic reset – 24…230 V – 2 OC

Schneider LT3SA00MW | PTC Probe Relay TeSys – LT3 Series – Automatic Reset – 24…230 V – 2 OC

General Description:

The Schneider LT3SA00MW is a PTC probe relay from the TeSys LT3 series. It is designed for motor thermal protection, particularly for detecting overheating using PTC thermistors embedded in the motor windings. This model features automatic reset functionality and supports a wide control voltage range from 24 to 230 V AC/DC. It includes 2 open changeover (OC) contacts for signaling or tripping the control system.

Key Features:

• Product Type: PTC probe relay

• Series: TeSys LT3

• Reset Type: Automatic

• Control Voltage Range: 24 to 230 V (AC or DC)

• Output Contacts: 2 OC (open changeover)

• Mounting Type: DIN rail or panel mounting

• Protection Function: Motor overheating detection

• Compatible Sensors: PTC thermistors (positive temperature coefficient)

Technical Specifications:

• Power Supply Tolerance: Wide range 24…230 V AC/DC

• Relay Outputs: 2 x changeover contacts (typically for alarms or disconnect signals)

• Operating Temperature: -20°C to +60°C

• Conformity Standards: IEC 60947-8, IEC 60255

• Response Time: Fast detection of over-temperature

• Installation: DIN rail (35 mm) or screw mounting

• Insulation Voltage: 250 V

• Electrical Durability: Up to 100,000 cycles

• Mechanical Durability: Over 10 million cycles

Applications:

• Motor thermal protection using PTC thermistors

• Monitoring winding temperature in motors, pumps, or fans

• Industrial automation and control panels

• Protection against motor overheating in HVAC, compressors, or conveyors

Benefits:

• Wide voltage range: Flexible for different control systems

• Automatic reset: Helps restore operation without manual intervention

• Reliable overheating protection to prolong motor life

• Compact and easy to install in control panels

• Compliant with international safety standards