IDEC Relays ASW320 Selector Switch

The IDEC ASW320 is a heavy-duty 22mm selector switch from the proven TW series, engineered for reliable pilot duty in demanding HVACR and industrial control panels. Featuring a 3-position maintained action with a 45-degree throw, this knob-style operator is designed for "stay-put" functionality, ensuring the circuit remains in the selected state (typically Manual-Off-Auto) without unintended resets. This non-illuminated rotary selector switch is built with a rugged octagonal chrome-plated locking bezel and a fracture-resistant nylon body, providing NEMA 4X and IP65 protection against water, oil, and dust infiltration in mechanical rooms.

Internally, the IDEC TW Series utilizes two normally open (2NO) contacts with a modular snap-on design, rated for up to 10A at 600VAC. The self-cleaning silver contacts employ a slow-make/double-break mechanism, minimizing contact resistance and ensuring high electrical longevity for motor starters and compressor control circuits. Installation is streamlined via M3.5 screw terminals with captive SEMS plates, accommodating wire sizes from 22 to 12 AWG. Whether you are performing a field replacement or a new panel build, the ASW320 offers the tactile feedback and environmental sealing required for professional-grade automation.

• NEMA 4X/IP65 Rated: Built with a corrosion-resistant chrome bezel for superior protection in washdown or oily industrial environments.
• Modular 2NO Configuration: Includes snap-on contact blocks that simplify field modifications and maintenance.
• Maintained 3-Position Action: Securely holds positions at -45°, 0°, and +45° for stable control of multi-stage HVAC systems.
• Heavy-Duty Electrical Life: Self-cleaning silver contacts are engineered for 500,000+ operations under standard pilot duty loads.
• Universal 22mm Mounting: Fits standard 7/8-inch panel knockouts with an adjustable ring for panel thicknesses up to 0.24 inches.

What is the difference between maintained and momentary action for this switch?
The ASW320 features maintained action, meaning the knob stays in the left, center, or right position until a technician manually turns it. Momentary switches would spring back to the center position upon release.

Can I add more contact blocks to the ASW320?
Yes, the TW series uses a modular design. You can stack additional snap-on contact blocks to expand the circuit logic as needed for complex starter or signaling applications.

Is this switch suitable for outdoor control panels?
Yes, the IP65 and NEMA 4X ratings ensure the internal contacts remain protected against rain, sleet, and external ice formation when properly installed in a compatible enclosure.

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.