The WNTSA100-4T is a 100A thermal overload relay that protects three-phase motors against overloads and phase failures. While its full adjustable range spans up to 100A, it can be set as low as 32A for applications requiring lower current protection. It features manual/auto reset, mechanical trip indication, and compatibility with TeSys D contactors.
Specifications
Parameter Specification
Model WNTSA100-4T
Current Setting Range 32 – 100 A
Minimum Setting 32 A (within adjustable range)
Rated Insulation Voltage (Ui) 690 V AC
Rated Operational Voltage (Ue) 400 V AC
Poles 3 poles
Trip Class Class 10
Ambient Temperature Range –25 °C to +60 °C
Mounting DIN‑rail or direct mounting
Auxiliary Contacts 1 NO (97‑98) + 1 NC (95‑96)
Trip Indication Mechanical flag
Reset Manual / automatic (selectable)
Standards IEC/EN 60947‑4‑1, UL 508, CSA
Primary Applications
Motor protection for pumps, fans, and compressors
Conveyor systems and material handling
Industrial machinery and process equipment
HVAC and building automation systems