The 58T is an  adjustable temperature control designed for applications requiring accurate calibration tolerances and narrow temperature differential. The snap action of the bimetal disc provides high-speed contact separation resulting in excellent life cycle characteristics at electrical loads up to 25 amps at 277VAC. It is available with contacts normally closed for electric heat applications, and contacts normally open for air conditioning and fan applications. Typical applications include electric baseboard heaters, portable and built-in electric heaters, attic ventilator fans and room air conditioners.