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Rib-Wound Power Adjustable Resistors (DQS)

Adjustable Ribbon-Wound (DQS) have been a main product line at DeMint Electronics for years. Adjustable ribwound resistors are particularly useful where high energy is to be dissipated in the lower ohmic ranges and high power capacity. Precision winding design, provide uniform windings to be applied extremely close to each other resulting in significantly higher resistance values.

In significant savings in space and cost, Adjustable (DQS) Series is ideal replacements for many standard round-wire resistors.

Downloads complete PDF version Rib-Wound Power Adjustable Resistors (DQS).

Features :
  1. Resistance Tolerance: K(±10%), J(±5%), H(±3%).
  2. Power-rib wirewound resistor with adjustable lug supplied.
  3. Suitable for high energy to be dissipated in the lower ohmic ranges.
  4. Design as heavy-duty resistors to withstand frequent start-stop cycles.
  5. Hollow core to permit secure fastening with spring-type clips or thru bolts with washers.
  6. Durability Flame resistant coating and all-welded construction.
  7. Terminals suitable for bolt connection or soldering.
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.
  4. Wattage is proportional to this adjusted resistance value.
  5. Adjustability is 10% to 90% of full resistance value.
Options :
  1. Adjustable, fixed, or tapped styles are available.
  2. Special terminals available for non-standard applications.
  3. Single and double quick connect terminals can be specified.
  4. Standard lug terminals available with or without terminal hardware.
  5. Non-inductive Ayrton Perry windings can be specified.
  6. Special temperature coefficients, tolerances
Dimensions (DQS 75W ~ 2000W)
(DQS) N - No Mount
(DQS) G - Horizontal Mount
Wattage
Rating		 Dimensions (Unit: mm) Max. Pickable Resistance Value (Ω)
A B C D E F G H I J K L M O
75W 110 25 16 30 8 150 5 18 6 166 58 1.2 6 27 1.5~8Ω
90W 90 28 18 32 8 130 5 19 6 146 60 1.2 6 27 1.5~9Ω
120W 110 28 18 32 8 150 5 19 6 166 60 1.2 6 27 2~12Ω
150W 140 28 18 32 8 180 5 19 6 196 60 1.2 6 27 2~15Ω
180W 160 28 18 32 8 200 5 19 6 216 60 1.2 6 27 3~18Ω
225W 195 28 18 32 8 235 5 19 6 251 60 1.2 6 27 3~23Ω
240W 185 35 24 36 10 225 5 19 8 245 76 1.6 6 34 5~24Ω
300W 210 35 24 36 10 250 5 19 8 274 76 1.6 6 34 5~30Ω
375W 210 40 25 38 12 250 5 20 8 274 78 1.6 6 34 6~38Ω
450W 260 40 25 38 12 300 5 20 8 320 78 1.6 6 34 6~45Ω
600W 330 40 25 38 12 370 5 20 8 395 78 1.6 6 34 7~60Ω
750W 330 50 35 50 12 380 6 25 9 400 100 1.6 8 40 8~75Ω
900W 400 50 35 50 12 450 6 25 9 470 100 1.6 8 40 8~90Ω
1000W 460 50 35 50 12 510 6 25 9 530 100 1.6 8 40 12~100Ω
1200W 460 60 40 55 15 515 6 30 10 535 110 1.6 10 50 12~120Ω
1500W 540 60 40 55 15 595 6 30 10 615 110 1.6 10 50 15~150Ω
2000W 650 65 42 62 15 702 6 30 10 722 115 1.6 10 50 15~200Ω
Characteristics (DQS)
Test Item Test Methods Characteristics
Resistance tolerance JIS-C-5202 5-1 Resistance Nominal Tolerance
1≤R 1>R ±5%(J) ±10%(K)
Temperature coefficient JIS-C-5202 5-2 ±400PPM/°C MAX
Load rating JIS-C-5202 5-4 ΔR/R≤ ±(0.5%+0.1Ω) Surface temperature up 350°C MAX
Short-term overload JIS-C-5202 5-5
500% rated wattage 5 seconds		 Free of appearance or structural irregularity ΔR/R≤ ±(2%+0.1Ω)
Insulation resistance JIS-C-5202 5-6 500VDC 100MΩ min
Dielectric withstanding voltage JIS-C-5202 5-7
1000VDC 1 minute Between terminal and anchor stand		 Free of appearance or structural irregularity ΔR/R≤ ±(0.1%+0.05Ω)
Terminal strength JIS-C-5202 6-1 8kg 30 seconds Free of appearance or structural irregularity
Vibration JIS-C-5202 6-3
1.5m/m 10 ~ 50 ~ 10 Hz/min X-Y-Z 2 hours each		 Free of appearance or structural irregularity Surface coating crack ΔR/R≤ ±(1%+0.05Ω)
Thermal shock JIS-C-5202 7-3
Room temp 30 minutes ON-55°C 15 minutes OFF		 Free of structural irregularity ΔR/R≤ ±(1%+0.05Ω)
Humidity JIS-C-5202 7-5
40°C 90%RH 240 hours		 Free of appearance or structural irregularity Surface coating crack ΔR/R≤ ±(3%+0.1Ω)
Load life JIS-C-5202 7-10
90 minutes ON - 30 minutes OFF500 hours		 Free of appearance or structural irregularity Surface coating crack ΔR/R≤ ±(5%+0.1Ω)
Flame retardation JIS-C-5202 7-13-3-2
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

Adjustable Wirewound Application Notes (DQS)

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 (DQS)
DQS 1500W 10R K G
Part Number
DQS
Rated Power (W)
75W~2000W
Resistance Value
0R1 0.1Ω
1R 1Ω
10R 10Ω
100R 100Ω
Resistance Tolerance (%)
H ±3%
J ±5%
K ±10%
Assembly Method
N No mount.
C Clip mount.
G Horizontal mount.
Z Vertical mount.