The 55 Series is designed to provide end-users and OEMs with dependable, repeatable temperature control in a compact size. A single SPDT or dual SPDT output provides critical temperature alarm and emergency shutdown. Standard length thermal assemblies or custom-sized lengths are available to meet application requirements.

Typical applications that utilize the 55 Series include commercial ovens and dryers, heat tracing and freeze protection, and refrigeration.

55 Series Temperature Switch Features

• Output flexibility with single or dual switch design
• Application versatility via panel or surface mount installation
• Heat tracing models to protect pipes and vessels
• Open frame construction for OEMs or rugged, NEMA 4X enclosure for industrial use
• Increase flexibility with multiple outputs
• Panel or surface mount for trouble-free installation
• External dial provides easy adjustment
• Optional external manual reset
• Copper or stainless steel bulb & capillary

55 Series Temperature Switch Specifications

• Ambient Temperature Limits: -40 to 160°F (-40 to 71°C); set point typically shifts less than 1% of range for a 50°F (28°C) ambient temperature change
• Set Point Repeatability: ± 1% of adjustable range
• Shock: Set point repeats after 15 G, 10 millisecond duration
• Vibration: Set point repeats after 2.5 G, 5-500 Hz
• Enclosure Classification:
  • Type E55 & E55A: Designed to meet enclosure type 4X requirements
  • Types E55S & E55AS: Skeleton, open frame construction, not applicable
• Enclosure: Die cast aluminum, epoxy powder coated with stainless steel, gasketed adjustment cover (E55 and E55A)
• Switch Output: One or two SPDT; dual switch may be separated up to 100% of range; switches may be wired “normally open” or “normally closed”
• Electrical Rating: 15A, 125/250/480 VAC resistive. 22A, 480 VAC for E55-R25HT and E55-L24HT heat trace models. 2A, 24-30 VDC resistive; 1A, 24-30 VDC inductive. 0.5A, 125 VDC resistive. 0.03A, 125 VDC inductive.
• Electrical Connection: 1/2” NPT (female) (E55 and E55A)
• Weight:
  • Types E55S, E55AS (skeleton): approximately 12 oz.
  • Types E55, E55A: approximately 1 lb
• Bulb and Capillary
  • Models E20BC - E23BC: 6 feet copper;
  • Models E20BS - E23BS: 6 feet stainless steel
  • Model R25HT: 10 feet stainless steel
  • Model L24HT: stainless steel, Local sensor, no capillary, for ambient sensing
• Temperature Fill: Non-toxic oil

55 Series Temperature Switch Industries

• Transportation
• HVAC
• Food and Beverage
• OEM Solutions

Download United Electric Controls 55 Series Temperature Datasheet

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