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Selector Switches

Selector switches are rotary or toggle switches used to control circuits by selecting between multiple positions or functions. Commonly found in industrial control panels, they allow operators to switch between modes such as ON/OFF, Forward/Reverse, or Manual/Automatic. Available in maintained (stays in position) or momentary (returns to default) configurations, selector switches can have two, three, or more positions depending on the application. They come with different actuator types, including rotary knobs, key-operated mechanisms for security, and illuminated versions for visibility. Since 2005, LiveWire Electrical Supply has been providing quality parts and fast shipping for in-stock selector switches, safety switches, and more—including hard-to-find items. Need help finding products? For 24/7 sales assistance, call 1-650-692-0700.

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Frequently Asked Questions

LiveWire Electrical Supply is your trusted source for hard-to-find electrical supplies, offering a wide selection of circuit breakers, fuses, safety switches, and industrial control products—all ready to ship the same day. With real-time stock and price checks, you can easily find what you need at competitive prices, whether for residential, commercial, or industrial projects. Our experts are available to assist with part identification and technical support, while our expedited shipping options and free UPS Ground shipping on qualifying orders ensure fast delivery. For 24/7 assistance and personalized support, call 1-650-692-0700.

What voltage and current ratings should I consider when selecting a switch?

When selecting a switch, consider both the voltage and current ratings to ensure compatibility with your electrical system and load requirements. The voltage rating indicates the maximum voltage the switch can safely handle, typically ranging from 24V to 600V AC/DC, depending on the application. The current rating specifies the maximum amperage the switch can carry without damage, commonly ranging from 1A for control circuits to 30A or more for power applications. For industrial environments, check whether the switch meets AC (typically AC-15 for control circuits) or DC (DC-13 for inductive loads) contact ratings. Ensure the switch can handle inrush currents from inductive loads like motors and solenoids. Always verify compliance with NEC, UL, and IEC standards to ensure safety and reliability in the intended application.

Can I replace or modify the switch contacts for different circuit configurations?

Yes, many selector switches allow you to replace or modify the switch contacts to suit different circuit configurations. Modular selector switches typically have interchangeable contact blocks, allowing you to add, remove, or rearrange normally open (NO) and normally closed (NC) contacts based on your needs. Some switches support stackable contact blocks, enabling multiple circuit operations from a single switch. However, it’s essential to check the manufacturer’s specifications to ensure compatibility and avoid exceeding the voltage and current ratings of the switch. When modifying contacts, ensure proper wiring to maintain safe operation and compliance with NEC, UL, or IEC standards. If the switch is used in a critical application, test it after modifications to verify correct functionality.

What wiring configurations do selector switches support (NO, NC, DPDT, etc.)?

Selector switches support various wiring configurations, depending on the number of positions and contact arrangements required for the application. The most common configurations include:

  • Normally Open (NO): The circuit is open when the switch is in its default position and closes when activated.
  • Normally Closed (NC): The circuit is closed in the default position and opens when the switch is activated.
  • Single Pole, Single Throw (SPST): Controls a single circuit with one ON and one OFF position.
  • Single Pole, Double Throw (SPDT): Switches between two circuits, commonly used for selecting between two sources or outputs.
  • Double Pole, Double Throw (DPDT): Controls two independent circuits simultaneously, often used for reversing motor direction or switching between control modes.
  • Multiple Contact Configurations: Some selector switches allow stacking contact blocks, enabling complex configurations such as 3PDT (Triple Pole, Double Throw) or additional NO/NC combinations for automation and control systems.
What is the difference between a rotary switch and a selector switch?

A rotary switch is a type of multi-position switch that rotates to connect different electrical circuits, commonly used for selecting voltage ranges, operating modes, or signal paths. It typically has multiple poles and throws, allowing for complex switching operations. 

A selector switch, on the other hand, is a type of rotary switch specifically designed for industrial control applications, often found in control panels for machinery and automation systems. Selector switches are typically modular, allowing for stackable contact blocks, and come in various actuator styles, including key-operated or illuminated versions. While all selector switches are rotary switches, not all rotary switches are selector switches, as rotary switches are used in a broader range of applications, including audio equipment, test instruments, and electronic circuits.

What is the main difference between a push button and a selector switch?
A push button is a momentary switch that requires pressing to activate and returns to its default position when released, commonly used for start, stop, or reset functions in control panels. A selector switch, on the other hand, is a maintained switch that rotates between multiple positions to select different modes or functions, such as ON/OFF, Forward/Reverse, or Manual/Automatic. While push buttons provide temporary control, selector switches maintain their position until manually changed, making them ideal for applications requiring mode selection rather than momentary activation.

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We strive to ship out your items within one business day. The shipping process may take up to 5 business days on some occasions. Feel free to contact us if your order is time sensitive. Call 1-650-692-0700 or email sales@livewiresupply.com for help.

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LiveWire certifies that every product shipped out of stock, by manufacturers and by fulfillment partners will be free of functional defects for one (1) year. If any part is found with functional defects during the warranty period, LiveWire will send out a replacement item for free. Warranty items must be returned to LiveWire for inspection and must be postmarked within the warranty period.

Contact our support team by emailing support@livewiresupply.com or calling 1-650-692-0700 during normal business hours for help with your warranty claim.

Disclaimer: Livewire Electrical Supply is not affiliated with, authorized by, or acting as a representative for the brands showcased on our platform. Please be aware that products sold by Livewire Electrical Supply do not include the original manufacturer’s warranty. All trademarks, brand names, and logos featured on this website belong to their respective owners. It’s important to note that this website is not endorsed, sanctioned, or approved by any of the manufacturers or trademark holders mentioned.

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