Applies To
All T100 Series Mechanical Time Switches
Question / Problem
What are the differences between T100 Series mechanical time switch models?
Common Application / Product Overview
The primary differences between T100 Series time switch models are the operating voltage, switch type, and enclosure style. Models within the same family share the same electrical specifications but vary by enclosure or added features (such as a fireman's switch) indicated by the model suffix.
Time Switch Family Overview
The table below outlines the voltage, frequency, and switch type for each T100 Series time switch family.
| Time Switch | Voltage / Frequency | Switch Type |
|---|---|---|
| T101 | 120 VAC / 60 Hz | Single-Pole Single-Throw (SPST) |
| T102 | 208 - 277 VAC / 60 Hz | Single-Pole Single-Throw (SPST) |
| T103 | 120 VAC / 60 Hz | Double-Pole Single-Throw (DPST) |
| T104 | 208 - 277 VAC / 60 Hz (Exception: T104-50 uses a 208 - 277 VAC / 50 Hz clock motor.) | Double-Pole Single-Throw (DPST) |
| T105 | 120 VAC / 60 Hz | Single-Pole Double-Throw (SPDT) |
| T106 | 208 - 277 VAC / 60 Hz | Single-Pole Double-Throw (SPDT) |
The following table outlines enclosure types and their corresponding model suffixes.
| Model Number Ending With | Enclosure Type | Example Model Numbers |
|---|---|---|
| No letter or B | Gray indoor-rated metal enclosure | T101, T104, T101B |
| R, RD89 | Gray outdoor-rated metal enclosure | T101R, T104R, T101RD89, T104RD89 |
| R3 | Beige outdoor-rated metal enclosure | T101R3, T104R3 |
| P, P3 | Outdoor-rated plastic enclosure (P = Gray, P3 = Beige) | T101P, T104P, T101P3, T104P3 |
| PCD82 | Gray outdoor-rated plastic enclosure with see-through door | T101PCD82, T104PCD82 |
| M, MD89 | Mechanism only (no enclosure) | T101M, T104M, T101MD89, T104MD89 |
| R201, P201, M201 | Includes fireman's switch (available in metal, plastic, or mechanism-only configurations) | T101R201, T104R201, T101P201, T104P201, T104M201 |
Model suffixes identify enclosure material, rating, and any included accessories (such as a fireman's switch).
Tips / Additional Notes
- The T100 Series designation refers to the entire family of mechanical time switches, including models T101 through T106.
- Time switches with 120 VAC clock motors are not interchangeable with models that use 208 - 277 VAC clock motors.
- T100 Series time switches cannot be wired for double-pole, double-throw (DPDT) applications.
- Refer to the product specification sheet for complete electrical ratings and wiring details.