TestSwitch, LLC

Home of the W3TS Test Switch.

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Reliable and Safe Test Switches


The W3TS Knife Blade Test Switch facilitates the testing, calibrating, disconnecting, troubleshooting, and checkout of control systems, meters, relays, instruments, transformers, and transducers.

DIN Rail Mounting

No risk of electric shock:

Our safety knob (Patent #5722534) gives operators the option of using a standard 5/16″ nut driver to open or close the test switch. Fingers stay out of reach of current-carrying parts. Just fit the nut driver over molded safety knob and pull up to open, down to close.

No metal mounting plates and No Potting:

Our exclusive footed barrier (Patent #5722534) wraps around each test switch to form a fail-safe reinforced thermoplastic mounting plate.

DIN Rail Mounting:

Our proprietary DIN Rail mounting is available on front connected switches.

Industry Approved:

All switches are IEEE Qualified, UL Qualified under Standard 414, ANSI Compliant, under C33.31; SVHC Complaint, under REACH; and RoHS Compliant as per EU Directive 2002/95EC.


Switches are also available with single terminals, through bars, phase barriers and bases with hardware.  Clear or Opaque covers come with all back-connected switches and are available as an option on front-connected switches.


TestSwitch is an ISO 9001 Company

PO Box 235
Oden, AR 71961



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