These precision, wirewound sensing resistors may be used to provide a voltage drop proportional to load current for use in providing current feedback. Select a resistance to drop as close to 1V d-c as possible at the maximum desired current setting; e.g., for 0-20 ampere service, select the 0.05 ohm resistor. For best stability, the resistors should be mounted to a heat sink and/or air or oil cooled to minimize the temperature rise. Use Kepco Model KT 1304, the 1000 ohm rheostat, to provide the current feedback. For information on the methods of controlling current, refer to Applications Notes. All sensing resistors are 4-terminal devices with separate current and potential connections. Clearance holes for #4 screws are provided.
NOTE: Contact Kepco if you need help choosing the correct sense resistor for your application.
| PART NUMBER |
RESISTANCE OHMS |
TERMINAL | MAXIMUM DISSIPATION |
SHIP WGT. | |
| oz. | kg. | ||||
| KT 1915 | 1.0 | leads | 50W (1) | 2 | 0.06 |
| KT 1385 | 0.67 | leads | 50W (1) | 2 | 0.06 |
| KT 1399 | 0.5 | leads | 50W (1) | 2 | 0.06 |
| KT 1386 | 0.333 | leads | 50W (1) | 2 | 0.06 |
| KT 1598 | 0.2 | leads | 50W (1) | 2 | 0.06 |
| KT 2356 | 0.1 | leads | 50W (1) | 2 | 0.06 |
| KT 2713 | 0.01 | leads | 50W (1) | 3 | 0.09 |
| KT 2537 | 0.0625 | leads | 100W (1) | 3 | 0.09 |
| KT 2536 | 0.05 | leads | 100W (1) | 3 | 0.09 |
| KT 2480 | 0.033 | leads | 100W (1) | 3 | 0.09 |
| KT 2330 | 0.02 | leads | 100W (1) | 3 | 0.09 |
| KT 2325 | 0.01 | Obsolete: replaced by KT 3130 | |||
| KT 2536 | 0.05 | leads | 100W (1) | 3 | 0.09 |
| KT 2714 | 0.001 | leads | 100W (1) | 3 | 0.09 |
| KT 3146 | 1.0 | screw | 100W (1) | 3 | 0.09 |
| KT 3126 | 0.1 | screw | 100W (1) | 3 | 0.09 |
| KT 3130 | 0.01 | screw | 100W (1) | 3 | 0.09 |
| KT 3131 | 0.001 | screw | 100W (1) | 3 | 0.09 |
| (1) | Recommended Heat Sink: 144 square inch, 1/4" aluminum or equivalent (950 square cm x 0.5 cm). Power rating based on 275°C max. hot spot temperature in 25°C ambient, derate to 80% power in 71°C ambient. Recommended heat sink is Kepco part number 136-0451. |
