Eaton Cutler-Hammer C320TDN30A Timer

The Eaton Cutler-Hammer C320TDN30A is a heavy-duty side-mounted solid-state ON delay timer engineered for integration with Freedom NEMA motor control systems. Designed for industrial-grade timing accuracy, this accessory provides a field-adjustable delay range of 1 to 30 seconds, making it essential for managing staggered motor starts and sequencing in complex electrical assemblies. It operates on a standard 120V AC control circuit and is physically compatible with Freedom Series NEMA sizes 00 through 2, as well as several IEC frames including A-K, C25D, C25E, and C25F.

This unit features a robust 0.5A pilot duty rating, specifically optimized for control circuit duty rather than direct switching of large contactor coils. Installation is streamlined via three quick-connect terminals (two per side) which allow for rapid field wiring without extensive downtime. As a cUL listed component, the C320TDN30A timer ensures your control panel meets stringent safety and regulatory benchmarks while providing the repeatability required for automated HVACR and process equipment.

Key Benefits:

• Broad Compatibility: Directly compatible with Eaton Freedom Series NEMA 00-2 starter frames and multiple IEC contactor series.
• Precision Timing: Adjustable 1-30 second delay allows for exact calibration of system startup sequences.
• Compact Solid-State Design: Side-mounting configuration preserves rail space and offers superior resistance to vibration compared to mechanical equivalents.
• Reliable Control Signal: Rated for 120V pilot duty, ensuring stable performance in commercial and industrial control panels.
• Simplified Field Wiring: Features 3-terminal quick-connect points for fast, secure electrical terminations.

Common Questions:

Can the C320TDN30A be used to switch large contactor coils directly?
No, this timer belongs to the pilot duty category with a 0.5 ampere rating. It is designed to switch control relay coils or smaller contactors within its rated capacity. For larger loads, it should be used in conjunction with an intermediate relay.

Does this timer support OFF-delay functionality?
The C320TDN30A is dedicated to ON-delay operations, meaning the timing cycle begins once the coil is energized, and the contacts change state after the set interval. For OFF-delay requirements, a different catalog number from the Freedom series is required.

What mounting position is required for this timer?
This is a side-mounted accessory. It attaches to the side of the compatible contactor or starter frame, engaging with the mechanical or electrical linkage of the base unit as specified in the Freedom series installation guide.

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.