Electronic Relays & Barriers

Low Sensitivity Electronic SAFE-PAK® Relay

Part Number: 144600
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The Low Sensitivity Electronic SAFE-PAK ® eliminate the need for explosion proof enclosures. No purging is required. Sensors closures up to 1000 ohms resistance control resitive loads to 5A at 120 VAC. 120 VAC, N.O. model.

  • No purging required
  • Closures up to 1000 ohms resistance
  • Loads to 5A at 120 VAC
CE ROHS Gems Compliant CSA


  • No purging required
  • Closures up to 1000 ohms resistance
  • Loads to 5A at 120 VAC
Intrinsically Safe
Operating Voltage
105 to 125 VAC
Turn-off Sensitivity
2000 ohms
Turn-on Sensitivity
500 ohms
Maximum Input DC Voltage
Maximum Input Current
Load Current
5 amps
6 mA at 120 VAC
Load Voltage
105 to 125 VAC
Capacitance (micro Farads)
Inductance (milli Henry)
Switch Operation
SPST Normally Open
Minimum Temperature
Maximum Temperature

Gems Sensors Instructions, Low Sensitivity and Latching SAFE-PAK

Format .pdf
Size 529 KB

Gems Sensors Catalog, Intrinsically Safe SAFE-PAK

Format .pdf
Size 556 KB
What does it mean to be "Intrinsically Safe?"

The term "intrinsically safe" refers to equipment and wiring which is incapable of releasing sufficient electrical or thermal energy under normal or abnormal conditions to cause ignition of a specific hazardous atmospheric mixture in its most easily ignited concentration. This is achieved by limiting the amount of power available to the electrical equipment in the hazardous area to a level below that which will ignite the gases present. To be certified "intrinsically safe," a device or circuit must be so designed that no two simultaneous failures can cause an explosion. In order to have a fire or explosion, fuel, oxygen and a source of ignition must be present. An intrinsically safe system assumes that fuel and oxygen are present in the atmosphere, but the system is designed such that the electrical energy or thermal energy of a particular instrument loop can never be great enough to cause ignition. Traditionally, protection from an explosion in hazardous environments has been accomplished either through the use of explosion proof conduits and enclosures (intended to contain an explosion), or via pressurization or purging (intended to isolate the explosive gas from the electrical equipment). Intrinsically safe apparatus cannot replace these methods in all applications, but in many cases can provide significant cost savings in installation and maintenance of the equipment in a hazardous area. The basic design of an intrinsic safety barrier uses Zener diodes to limit voltage, resistors to limit current and a fuse. Gems™ Intrinsically Safe Relays and Zener Barriers are approved devices designed to render any non-voltage producing sensor or switch intrinsically safe. For more information on hazardous locations as defined by the National Electrical Code (NEC) Handbook, click here.