The Gardner Bender GSW‑21 is a rugged, motor‑rated maintained‑contact push‑button switch engineered for reliable performance in residential, commercial, industrial, automotive, and marine environments. Designed to deliver long‑lasting durability with smooth, consistent actuation, this switch uses a Push‑On / Push‑Off SPST mechanism, ideal for circuits requiring a stable ON or OFF state until manually changed.

Constructed with a robust housing and a clean black finish, the GSW‑21 is both functional and visually neutral, enabling it to blend into equipment panels, machinery housings, lighting systems, and control boxes. The switch comes equipped with 6-inch 18 AWG wire leads, simplifying installation and ensuring dependable electrical connectivity. Its motor-rated, high-current design makes it suitable for applications that demand more from a simple push-button switch.

Whether you're installing a new system or replacing a worn-out component, the GSW‑21 provides dependable performance backed by safety certifications and proven Gardner Bender quality.

Key Features

• Maintained Contact Operation: Push‑On / Push‑Off action holds the switch in the selected state until pressed again, ensuring stable and predictable control.
• SPST Circuitry: Simple and reliable single‑pole, single‑throw design suitable for ON/OFF control applications.
• Motor‑Rated Durability: Rated for 10A at 125VAC, 4A at 250VAC, or 1/3 HP at 125VAC, supporting demanding electrical loads.
• 6-inch Wire Leads: Includes 6 in. 18 AWG leads for easy wiring and secure electrical connection.
• Rugged Push‑Button Design: Non‑illuminated, round, black push-button actuator offers long-lasting durability in many environments.
• Mounting Nut Included: Ensures secure installation into panels or enclosures.
• UL and CSA Certified: Meets recognized electrical safety and performance standards.
• Versatile Applications: Suitable for industrial machinery, commercial equipment, automotive systems, marine environments, and general-purpose control switching. 

Specifications

• Switch Type: Push-button, maintained contact (Push‑On / Push‑Off) 
• Contact Configuration: SPST (Single Pole, Single Throw) 
• Electrical Ratings:
  • 10A @ 125VAC
  • 4A @ 250VAC
  • 1/3 HP @ 125VAC 
• Voltage Rating: 125–250 VAC range supported 
• Leads: 6-inch, 18 AWG wire leads 
• Material & Finish:
  • Black push-button actuator
  • Durable housing suitable for commercial and industrial environments 
• Dimensions:
  • Height: approx. 0.8–0.9 in
  • Width: approx. 1.25–1.7 in
  • Depth/Length: approx. 0.98–2.9 in depending on package/out-of-package measurements
• Certifications: UL Listed, CSA Certified 
• Mounting: Includes threaded bushing and mounting nut for secure installation

Applications

The GSW‑21 is suited for a wide range of electrical systems requiring reliable maintained switching, including:

• Motor Equipment Control: Ideal for starting/stopping small motors and equipment requiring a stable maintained state.
• Industrial & Commercial Panels: Durable enough for factory machinery, workstations, and automated systems.
• Lighting & Security Systems: Can be used for ON/OFF lighting control, alarms, alerts, and more.
• Automotive & Marine Applications: Suitable for dash panels, cabin controls, pumps, and auxiliary systems.
• General Electrical Projects: Compatible with DIY builds, appliance repair, test stations, and custom control setups.