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Spec Setter Heavy Duty

ABB Spec Setter Heavy Duty Safety Switch - 2024 EC&M Product of the Year Category Winner

Type TH heavy duty safety switches are designed for commercial and industrial applications where safety, high performance and continuity of service are essential.

Heavy duty switches are available in 30-1200 amps, 600 Vac, 600 Vdc maximum, fusible and non-fusible units, and in NEMA Type 1 (indoor), Type 3R (outdoor), Type 4/4X (water and dust-tight, corrosion resistant), and Type 5/12 (drip and dust-tight) enclosures. When used with Class R or J fuses, 30-600 amp switches have a UL Listed short-circuit rating of 200,000 rms symmetrical amps. Switches rated 800-1200 amps use Class L fuses and have a UL Listed short circuit rating of 100,000 rms symmetrical amps. Heavy duty safety switches are UL Listed as service entrance equipment when installed in accordance with the National Electrical Code.

Our heavy duty safety switches are UL Listed and CSA certified (UL98 Enclosed Switches/CSA-C22.2 No. 4-04), meet Federal Specification WS-865C for heavy duty switches and meet NEMA Enclosed Safety Switch Standard KS1-2001.

VOTE NOW: Enhanced 400-600A Spec Setter™ Safety Switch

ABB Spec Setter Safety Switch


Save Time & Labor Cost

Self-mounting design for 400-600A

Factory installed neutral kits

Easy-grip red donut handle

Easy Protection

UL 98 listed

Federal specification WS-865C

NEMA enclosed safety switch standard KS1-2013

Seismic certified

Help Prevents Errors

Extra large viewing window for 30-600A

Clear line shields

Wide gutter for easy wire-pulling

Plated blades

Flex Across Applications

Cu/Al lugs rated 60/75 °C allow greater wire selection

Multiple enclosure options
DC rated

Features and benefits

  • Best suited for commercial and industrial applications.
  • Highly visible ON/OFF label takes the guesswork out of safety and gives a clean, modern appearance.
  • Bright red "donut" handle, molded from rugged SE1 Noryl thermoplastic, is easy to see, easy to grip and ideal for hook stick operation. It accepts three padlocks in OFF position.
  • Coin-proof, defeatable dual interlocks meet all safety inspection requirements.
  • Wide, unobstructed gutter and removable interior make wire pulling and lug connections quick and easy.
  • Three-point mounting pattern speeds installation and simplifies ganging in close quarters.
  • Clear line shield allows visual verification of blade position while guarding against accidental contact with live parts.
  • Accessories, such as auxiliary switch kits, are UL Listed for quick and easy field installation (or they may be factory installed).
  • Plated blades provide visible confirmation of contact position.
  • Direct-drive, quick-make, quick-break mechanism "snaps" the contacts open and closed, providing positive ON/OFF indication while prolonging switch life.
  • Spring-reinforced fuse clips assure reliable contact for cool operation. Suitable for Class H, K, J or R fuses.
  • Cu-Al lugs are 60/75 degree C rated to permit greater wire selection.
  • Galvanized steel enclosure offers superior rust protection in outdoor applications. There's also a durable polyester powder-coat finish
  • 30-200 amp NEMA Type 5/12 switches are suitable for mill duty applications
ABB Spec Setter Heavy Duty Safety Switches



  • Commercial and industrial applications
  • Oil and gas industry 
  • Solar and back-up power 
  • Grip to charger