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E-SAFE® II Hybrid Power Switch

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The E-SAFE® II hybrid power switch provides reliable and accurate power switching up to 35 amperes at 158ºF (70ºC). This mercury-free product is specifically designed to operate in the higher ambient temperatures of foodservice applications.

Utilization of mercury relays is being eliminated due to many regulations affecting its use in the United States and around the world to replace mercury-relay switches. The E-SAFE II is the best performing product at the most economical price. Because of the product's unique design, there is no need to purchase costly heat sinks used with traditional solid state relays (SSRs). In addition, since this is a three-phase device, there is no need to wire multiple command signals. With a switching life of millions of cycles and an ambient rating of 158ºF (70ºC), with no heat sink required, this product is superior to typical SSRs.

The E-SAFE II hybrid power switch provides foodservice operators with longer contact life and higher performance than typical mechanical contactors used in equipment. By using Watlow's patent NO-ARC technology, the E-SAFE II can switch millions of cycles to increase the life of the product with reduced noise and increased temperature accuracy. E-SAFE II's inherent ability to operate at fast cycle times make it an ideal complimentary product for a time, proportional, integral derivative (PID) controller.

E-SAFE II is mercury free, RoHS compliant by design, CE approved and C-UL®/UL® recognized. The reliability of the product is protected by a two-year warranty

E-SAFE® II Hybrid Power Switch (PG 127)

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Dimension Drawing of E-SAFE® II Hybrid Power Switch (PG 127)

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Features and Benefits · Specifications

Features and Benefits

Mercury free
  • Improves safety by eliminating risk of toxic metals in proximity to food
  • Adheres to federal and state regulations phasing out and banning mercury
High ambient temperature rating of 158ºF (70ºC)
  • Specifically designed to operate in the higher ambient temperatures of foodservice applications
NO-ARC hybrid power switch technology
  • Combines the current carrying capacity of mechanical contacts with the longevity of solid state technology
  • Allows faster cycling times than mechanical contactors
  • Delivers more precise temperature control, saves energy, extends heater life and decreases total cost of ownership
Compact and touch-safe package
  • Fits in shallow foodservice cabinets
  • Allows for horizontal or vertical mounting installations
  • Increases safety for installer/operator
  • Uses Ultem® enclosure material with an horizontal burn rating (HB) rating of 338ºF (170ºC) and a UL® flame retardant rating of 94 5VA
RoHS compliant by design
  • Specifically designed to meet Asian and European requirements
LED indicator light
  • Indicates command signal presence from controller
  • Assists in trouble shooting
Agency approvals
  • UL® recognition, C-UL® and CE
  • WEEE compliant


Output voltage
  • 200/240VAC +10/-15%, 50/60Hz, 100/120VAC +10/-15%, 50/60Hz
Output amperage
  • Up to 35A single, dual and three-phase
Operating environment
  • 32 to 158ºF (0 to 70ºC) operating temperature
  • 0 to 90% RH (relative humidity), non-condensing
  • Operational life: four million switching cycles
  • Installation category III, pollution degree 2
Control mode
  • NO-ARC hybrid contactor
Input command signal
  • 3 to 32VDC, 24VAC +20/-20%, off state ≤2.7VDC
  • 100 to 240VAC +10/-15%, (85 to 264VAC)
    Note: On the 100 to 240VAC input models, do not use a RC snubber on the E-SAFE II relay input or the temperature control command signal output
LED indicator light
  • Built in LED assists in trouble shooting; LED "off" indicates relay (s) are open, LED "on" indicates relay (s) are closed.
Input command signal terminals
  • 1/4 in. fast on appliance
Line and load terminals
  • No. 10 screw will accept ring or spade, 1/4 in. (6.35 mm) x 10-32
  • Back panel mount, horizontal or vertical mounting options


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