This product is part of SAFETY
Relevant applications:


1-pole bulb and capillary manual or automatic reset safety limiter.



  • Available either for temperature regulation or over-temperature protection
  • Factory pre-set fixed temperature, OEM adjustable or end-user knob adjustable temperature
  • Wide variety of temperature ranges customized to requirements
  • Precise temperature control with fast reaction time
  • Adaptable to both air and immersion type applications
  • Trip free manual reset
  • Multiple bracket options for field retrofit
  • Protective capillary sleeving available



A rise in temperature causes the expansion of liquid within the bulb and capillary.  The liquid acts on a bellows assembly within the plastic housing to open and close electrical contacts.

Technical characteristics
TypeSingle pole single throw (SPST) Option : changeover contact (SPDT)
Temperature range-35 to 350°C / -31 to 662°F
Rating20A - 250V (EN, UL)
MaterialCopper, stainless steel
Capillary lengthUp to 3000 mm / Up to 118”
Sensing elements diameters3 to 8mm / 1/8" to 5/16"
ConnectionsBrass or nickel plated fastons, pillar terminals
ApprovalsCE conformity, ENEC mark according to EN-60730-1, EN 60730-2-9, ROHS conformity UL / CUL approved equivalents (25A)
Technical drawings