Direct's (FVR) Series is a C-shaped ceramic rod and wound with copper or chromium-alloy wire as a resistance element. Except for the slide contact surface, the entire component is coated with a high-temperature, non-flammable resin. After cooling and drying, insulation is applied through a high-temperature process. Then, a centered rotating adjuster component is installed, which slides along the resistance element and varies the resistance to the desired value.
Adjustable wirewound resistors are often called potentiometers in books and catalogues. Variable (FVR) may be used as a power rheostat with two connections (the wiper and just one end of the track) or as a potentiometer with all three connections in use.
Downloads Complete Specification in PDF C-Shaped Rheostat Power Variable Resistor (FVR).Applications :
|Dimensions (FVR 25W - 100W)|
|Dimensions(mm)||Max. Pickable Resistance Value (Ω)|
|A ± 0.5||B ± 0.5||C ± 3.0||D||E ± 0.5||F ± 3.0||G ± 3.0||H ± 3.0||I ± 0.5||J ± 0.5||K ± 0.5||Weight|
|Performance Specifications (FVR)|
|Test Item||Test Methods||Characteristics|
|Resistance tolerance||JIS-C-5261 5-1||Resistance tolerance ±10%|
|Insulation resistance||JIS-C-5261 6-1 500VDC||100MΩ min|
|Dielectric withstanding voltage||JIS-C-5261 7-1 1000VDC 1 minute Between terminal and axis||Free of appearance or structural irregularity|
|Terminal strength||JIS-C-5261 6-5
3kg 30 seconds
|Free of appearance or structural irregularity
|Vibration||JIS-C-5261 6-6 1.5m/m 10 ~ 50 ~ 10 Hz/min X-Y-Z 2 hours each||Free of appearance or structural irregularity
|Load life||JIS-C-5261 7-7||Free of appearance or structural irregularity
|Full gyration angle||JIS-C-5261 6-1||300± 5°C|
|Flame retardation||100% - 600% rated wattage load||US UL-94 flame retardation test V-0 grade noncombustible|
|Remarks||1. Resistance and resistance tolerance were tested in-house with micro resistance meter.
2. Coating refers to UL-certified data provided by supplier.
Determination of End Resistance Value of FVR, DQS, DSRA, DSRB, BSR, BSQ:
Power Rating of Variable Resistor:
The part Nunber formation of FVR, DQS, DSRA, DSRB, BSR, BSQ:
- - -
Product type means one of FVR, DQS, DSRA, DSRB, BSR, BSQ.
Rated Wattage means power rating at End Resistance Value.
Resistance Value (Ω) means maximum resistance value (End Resistance Value).
Resistance Tolerance means precision range of End Resistance Value.
If you need current constant type or special specifications, please feel free to cntact us.
|Order Codes (FVR)|