Series MTL7706/7787 Zener Barrier

Series MTL7706/7787 Zener Barrier

Series MTL5541 Galvanic Barrier

Series MTL5541 Galvanic Barrier

Model KFD0 Galvanic Barrier

Loop Powered, Intrinsically Safe Isolators

The Model KFD0 Loop Powered, Galvanic Barrier provides complete isolation for communication with Dwyer® intrinsically-safe transmitters approved for use in hazardous areas. Galvanic barrier eliminates the need for a high integrity earth ground required when using shunt type diode type safety barriers. Unlike most other isolators, the Model KFD0-SCSEX1.55 does not require external power and has a low current draw. The housing is designed to easily mount on most standard DIN rails.

Product Applications

  • Used to isolate voltages for intrinsically safe applications for HHT series
Starting at $726.25
Grouped product items
Model Description Availability* Qty Price
KFD0-SCS-EX1.55 Loop powered galvanic barrier for use with intrinsically safe transmitters. 1-3 days*


Hazardous Area Input:
Signal Range: 4 to 20 mA (linear transmission 1-22 mA); Available Transmitter Voltage: ≥16 V for supply voltage > 21 V.
Safe Area Output:
Signal Range: 4 to 20 mA; Transmitter Voltage: ≤30 VDC.
Response Time:
≤20 µs at 0, and ≤600 µs at 800 Load.
Maximum Power Disipation:
150 mW @ 20 mA and V<24 V.
Temperature Limits:
-4 to 140°F (-20 to 60°C).
Temperature Drift:
≤0.5 µA/°C.
4.2 oz (120 g).
Agency Approvals:


  • Designed to mount on most standard DIN rails
  • Approved for use in hazardous areas

Product Literature

Catalog Pages

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Model Description Availability* Price