Electronic Relays & Barriers

54800 Series Dual Channel Zener Barrier

Part Number: 54801
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54800 Series are best suited for instrumentation that produces an output (signal conditioners) requiring two barriers, one for each "floating" lead. Any non-voltage-producing sensor or switch is rendered intrinsically safe for hazardous locations when properly connected to the output of these Zener Barriers.


5 days
Lead-times and expedites

Lead-times apply to standard parts & configurations. Expedited shipments available by contacting factory. Lead-times may vary based on quantity and/or non-standard configurations.

CE ROHS Gems Compliant CSA


  • Intrinsic safety with solid-state reliability
  • Since no explosion-proof enclosures are needed for sensor wiring; these units further provide economical installation
  • With encapsulated construction; 54800 Series Barriers are impervious to dust and moisture
  • Optional clip available for rail mounting
Intrinsically Safe
Operating Voltage
Turn-off Sensitivity
Turn-on Sensitivity
Maximum Input DC Voltage
15 VDC
Maximum Input Current
200 mA
Load Current
Load Voltage
Capacitance (micro Farads)
5.6 uF
Inductance (milli Henry)
0.7 mH
Switch Operation
Minimum Temperature
Maximum Temperature

Gems Sensors Instructions, 54800 SAFE-PAK

Format .pdf
Size 629 KB

Gems Sensors Catalog, 54800

Format .pdf
Size 503 KB
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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.