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

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

Schneider Electric
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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

SKU: LT3SA00MW Category: Brand:
Main
range of productLT3
Device short nameLT3SA
Product or component typeeThermistor protection units
[Uc] control circuit voltage24…230 V AC 50/60 Hz
24…230 V DC
ResetAutomatic reset
Complementary
Control circuit voltage limits0.8…1.1 Uc
Contacts type and composition2 C/O multi voltage
[Ith] conventional free air thermal current5 A for output control relay
[Ui] rated insulation voltageOutput control relay: 500 V AC
[Ue] rated operational voltage250 V AC 50/60 Hz for output control relay
Signalling functionFault indication
Voltage indication
control typeAutomatic reset
Probe interchangeabilityLabel mark A conforming to IEC 60034-11
Hold-in power consumption in W1 W
Hold-in power consumption in VA2.5 VA
Resistance1500…1650 Ohm reset
2700…3100 Ohm tripping
Number of probes0…6
Input voltage< 2.5 V (1500 Ohm) for probe
< 7.5 V (4000 Ohm) for probe conforming to IEC 60034-11
Maximum short circuit detection resistance20 Ohm
Condition of useConnection of probes 400 m >1 mm²
Connection of probes 500 m >1.5 mm²
[Uimp] rated impulse withstand voltage2.5 kV
Rated power in VA100 VA at 220 V – electrical durability: 500000 cycles
Breaking capacity2 A at 24 V DC DC-13
3 A at 250 V AC AC-16
6 A at 120 V AC AC-16
Connections – terminalsPower circuit: cage type connector 1 cable(s) 0.75…2.5 mm²flexible with cable end
Power circuit: cage type connector 1 cable(s) 0.75…2.5 mm²solid with cable end
Power circuit: cage type connector 1 cable(s) 1…2.5 mm²flexible without cable end
Power circuit: cage type connector 1 cable(s) 1…2.5 mm²solid without cable end
Power circuit: cage type connector 2 cable(s) 0.75…2.5 mm²flexible with cable end
Power circuit: cage type connector 2 cable(s) 0.75…2.5 mm²solid with cable end
Power circuit: cage type connector 2 cable(s) 1…2.5 mm²flexible without cable end
Power circuit: cage type connector 2 cable(s) 1…2.5 mm²solid without cable end
Tightening torque0.8 N.m
height100 mm
Width22.5 mm
Depth100 mm
Net weight0.22 kg
Environment
StandardsIEC 60947-8
IEC 60034-11
VDE 0660
IP degree of protectionIP20 conforming to IEC 60529
IP20 conforming to VDE 0106
ambient air temperature for operation-25…60 °C
Ambient air temperature for storage-40…85 °C conforming to IEC 60068-2-2
-40…85 °C conforming to IEC 60068-2-2
Operating altitude<= 1500 m without derating in temperature > 1500…3000 m with derating in temperature
Vibration resistance1 gn 25…150 Hz conforming to IEC 60068-2-6
2.5 gn 2…25 Hz conforming to IEC 60068-2-6
Shock resistance5 gn 11 ms conforming to IEC 60068-2-27
Electromagnetic compatibilityResistance to electrostatic discharge level 3 conforming to IEC 61000-4-2
Resistance to fast transient level 3 conforming to IEC 61000-4-4
Surge resistance 1.2/50-8/20 level 4 conforming to IEC 61000-4-5
Susceptibility to electromagnetic fields level 3 conforming to IEC 61000-4-3
Immunity to microbreaks and voltage drops conforming to IEC 61000-4-11
Packing Units
Unit Type of Package 1PCE
Number of Units in Package 11
Package 1 Height2.5 cm
Package 1 Width10.3 cm
Package 1 Length10.3 cm
Package 1 Weight153.0 g
Unit Type of Package 2S02
Number of Units in Package 236
Package 2 Height15.0 cm
Package 2 Width30.0 cm
Package 2 Length40.0 cm
Package 2 Weight5.812 kg
Contractual warranty
Warranty18 months

Main Document

Data Sheet : LT3SA00MW

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