Slide Rotary Resistor Enclosure (BSR, BSQ)

Following market demands, Direct Electronics provides enclosures to house unlimited combinations of resistors (DR or DQ Power Series) to meet design engineers and customer requirements.

Direct's high current adjustable power BSR, BSQ resistor is one-of-a-kind enclosure application to hundreds of enclosures per mount housing various resistor packages. Our engineering staff can assist the customer in meeting their unique design needs.

These quality design features include all stainless steel grids and terminals, high temperature insulation, welded construction, end-frames with gussets for added mechanical strength. Slotted mounting holes for easy installation.

Also accommodates a flexible range of assembly options for convenient utilization and installation. BSQ Ribwound resistors are particularly useful where high energy is to be dissipated in the lower ohmic ranges. Replacements for many standard BSR round-wire resistors are available resulting in significant savings in space and cost.

The Power Adjustable BSR, and BSQ Resistor is RoHS compliant and lead free.
For unusual technical requirements and custom special applications, please contact us.
Downloads Complete Specification in PDF Rotary Slide Power Resistors (BSR, BSQ).

Features :
  1. Resistance Tolerance: K(±10%).
  2. High power and high current applications.
  3. Flame resistant and rugged lead free coating.
  4. One-of-a-kind enclosure application to fit mount housing various resistor packages.
To Calculate Max. Amperes :
  1. Amperes = (Watts / Ohms) 1/2
Rotary Slide Dimensions (BSR)
Power Adjustable Slide Resistor (BSR) Dimensions
Power Adjustable Slide Resistor (BSR) Dimensions
Wattage Rating Dimensions (Unit: mm) Max. Pickable
Resistance Value (Ω)
Case A B C Ceramic Rod Bakelite
200W A 285 130 135 28×250 120×70×10 6-1KΩ
400W B 360 150 185 40×325 170×90×10 8-2KΩ
500W B 360 150 185 40×325 170×90×10 10-2.5KΩ
1000W C 570 160 200 60×535 185×100×10 15-5KΩ
1300W D 680 160 200 65×645 185×100×10 16-6KΩ
Rotary Slide Dimensions (BSQ)
Power Adjustable Slide Resistor (BSQ) Dimensions
Power Adjustable Slide Resistor (BSQ) Dimensions
Wattage Rating Dimensions (Unit: mm) Max. Pickable
Resistance Value (Ω)
Case A B C Ceramic Rod Bakelite
300W A 285 130 135 28×250 120×70×10 6-30Ω
600W B 360 150 185 40×325 170×90×10 8-60Ω
750W B 360 150 185 40×325 170×90×10 10-75Ω
1500W C 570 160 200 60×535 185×100×10 15-150Ω
2000W D 680 160 200 65×645 185×100×10 16-200Ω

Power Adjustable Application Notes (BSR, BSQ)

Determination of End Resistance Value of FVR, DQS, DSRA, DSRB, BSR, BSQ:

  1. Resistance Range means you can choose one maximum resistance value (Max. Pickable Resistance / End resistance value)
    at one of FVR, DQS, DSRA, DSRB, BSR, BSQ VR (Variable Resistor) type.

  2. After End Resistance Value confirmed, the minimum resistance (start resistance value) will be determined
    by depending on resistance of wire and wirewound type.

Power Rating of Variable Resistor:
The part Nunber formation of FVR, DQS, DSRA, DSRB, BSR, BSQ:

Product type - Rated Wattage - Max. Pickable Resistance (Ω) - Resistance Tolerance

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.

1. Power Rating of VR (Variable Resistor) is determined by the maximum resistance value (End Resistance Value).
2. Resistance and Power Rating should be decreased while you are adjusting the screw.

Notes:

  1. Adjustability is 10% to 90% of full resistance value.
  2. Wattage is proportional to this adjusted resistance value.

Power Rating:

  1. Based on 25°C free air rating. The stated wattage rating applies only when the entire resistance is in the circuit.
  2. Setting the lug at an intermediate point reduces the wattage rating by approximately the same proportion.
  3. Example: If the lug is set at half resistance, the wattage is reduced by approximately one-half.

If you need current constant type or special specifications, please feel free to cntact us.

Order Codes (BSR, BSQ)
BSQ 2000W 20R K
Part Number
BSR
BSQ
Rated Power (W)
200W~1300W
300W~2000W
Max.Resistance Value (Ω)
Indicates resistance value in units of ohms.
Resistance Tolerance(%)
K ±10%