The 50-140 and 51-140 Isolators have been designed to operate in the most severe environments. The 51-140 Isolator utilizes Schottky diodes, vs Silicon, to reduce the voltage drop associated with current passing through them.
The 50-140 and 51-140 isolators are designed to operate in the most severe environments. The 51-140 isolator uses Schottky diodes instead of silicon to reduce voltage drop, and its components are fully encapsulated/potted.
The manual lists storage and operating temperature ranges, input voltage, maximum amperage, mounting dimensions and torque values, weight, and a typical vehicle wiring diagram. It also specifies mounting on a flat surface with fins vertical and notes limited exposure to direct pressure spray.
| Storage temperature | -67°F to +257°F (-55°C to +125°C) |
|---|---|
| Operating temperature | -67°F to +140°F (-55°C to +60°C) |
| Input voltage | 0 - 32V DC |
| Maximum amperage | 180 Amps/Alt, 250 Amps/Alt, 165 Amps/Leg, 200 Amps/Leg |
| Weight | 3 lbs (1.4 kg) |
| Mounting stud torque | 100-120 lb-in (11.3-13.6 N-m) |
| Mounting slot torque | 18-20 lb-in (2-2.3 N-m) |
| Encapsulation | Components are fully encapsulated/potted |
| Mounting orientation | Mount on a flat surface with fins vertical |
The operating temperature range is -67°F to +140°F (-55°C to +60°C).
The storage temperature range is -67°F to +257°F (-55°C to +125°C).
The specified torque range is 100-120 lb-in (11.3-13.6 N-m).
Mount it on a flat surface with the fins in a vertical orientation to maximize convection cooling.