Overview
The Intermatic T101B is a 24-hour mechanical time switch designed for direct control of electrical loads up to 40 amps. Operating at 120V AC 60Hz, this timer features a single-pole, single-throw (SPST) configuration housed in a steel enclosure with a rotary dial interface. The unit includes one ON tripper and one OFF tripper, enabling up to 12 independent ON/OFF operations per day with a minimum 1-hour interval. Manual override switch provides flexibility for immediate load control without disrupting the programmed schedule.
Key Features
- 24-Hour Mechanical Control: Direct dial-based scheduling with proven T100 Series design
- 40A Load Capacity: Single-pole switching rated for up to 40 amps per pole, supporting 2 HP loads
- Up to 12 Daily Operations: Flexible ON/OFF programming with minimum 1-hour intervals
- Manual Override Switch: Instant load control independent of programmed schedule
- Indoor Steel Enclosure: NEMA 1 rated metal housing with gray finish for wall mounting
- Included Trippers: One ON and one OFF tripper supplied; additional trippers available separately
Technical Specifications
- Input Voltage: 120V AC
- Frequency: 60 Hz
- Switch Type: SPST (Single-Pole, Single-Throw)
- Maximum Load Current: 40 amps per pole
- Horsepower Rating: 2 HP
- Power Consumption (Clock Motor): 3 watts
- Time Interval: 1 hour minimum ON/OFF duration
- Daily Operations: Up to 12 ON/OFF cycles
- Enclosure Type: Indoor metal (NEMA 1)
- Mounting: Wall-mount with screw terminals
- Warranty: 1-year manufacturer warranty
Typical Applications
The Intermatic T101B is widely used in commercial, industrial, and residential settings for:
- Outdoor and indoor lighting control
- HVAC and ventilation fan scheduling
- Pool and spa heater operation
- Pump and water system control
- Sign and display lighting automation
- Electric fence control
- Conveyor and equipment scheduling
Compatibility & Replacements
Compatible With
- 120V AC 60Hz electrical circuits
- Resistive loads (lighting, heating)
- Single-phase motor loads up to 2 HP
- Standard wall-mounted control enclosures
- NEMA 1 indoor installations
Replaces / Drop-In Replacement For
- Intermatic T101 (standard indoor metal version)
- Grasslin mechanical timer equivalents
- Other T100 Series 120V SPST 40A mechanical switches
Works With
- Manual load override — no software or networking required
- Mechanical dial programming — no electrical configuration
- Standard electrical wire and screw terminals (LINE, LOAD, NEUTRAL)
- Building automation systems as a standalone scheduler
