Intermatic T1905 Timer

The Intermatic T1905 Mechanical Timer is a reliable solution for technicians requiring high-precision 24-hour control in heavy-duty applications. This 125V SPDT timer (Single Pole Double Throw) stands out from standard models by offering 15-minute timing intervals, providing significantly more granular scheduling than the typical 30-minute or 2-hour increments found on basic switches. Engineered for versatility, the SPDT contact configuration allows you to manage two separate circuits—ideal for switching between high and low-speed motors, controlling HVAC blowers, or managing complex lighting zones. Use the 20A resistive rating to handle inductive or resistive loads with confidence. The unit includes 96 captive trippers that cannot be lost and a robust NEMA 1 indoor metal enclosure with a manual override lever for immediate system testing. Whether you are retrofitting older systems or installing new ones, the T1905 ensures accurate cycling of 1/2 HP motors and 125 VAC circuits in demanding commercial environments.

• Precise Scheduling: Features 15-minute increments with 96 captive trippers for up to 48 ON/OFF operations every 24 hours.
• Industrial Durability: Housed in a heavy-duty NEMA 1 gray indoor steel enclosure with a lockable hasp to prevent unauthorized tampering.
• Flexible Control: The SPDT switch supports two-circuit control or can be wired for single-circuit NO (Normally Open) or NC (Normally Closed) operation.
• High Load Capacity: Rated for 20 Amps resistive and 1/2 HP at 125 VAC, making it compatible with various HVACR equipment.
• Contractor-Friendly Design: Utilizes 1/2 inch and 3/4 inch knockouts for easy conduit entry and supports up to #12 AWG wiring.

Can the Intermatic T1905 be used to control a two-speed motor?
Yes. Because this is an SPDT mechanical timer, you can wire the high speed to the Normally Open (NO) terminal and the low speed to the Normally Closed (NC) terminal. This ensures the motor defaults to one speed and switches to the other at your programmed times.

What is the minimum timing interval for this unit?
The T1905 allows for a 15-minute minimum ON/OFF duration. This is made possible by the 96 integrated trippers on the dial, allowing for highly specific scheduling of light banks, fans, or heaters.

Is this timer compatible with 240V circuits?
No. While the contacts are rated for various voltages, the clock motor in the T1905 is specifically 125 VAC 60 Hz. For 240V applications, use the T1906 or a compatible 240V mechanism.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.