Vitreous Enameled Power Wirewound Resistors - DRB20

Vitreous Enameled Power Wirewound Resistors - DRB20

Power Wirewound Enameled Resistor (DRB20) Is a cylindrical ceramic tube at both ends clips to fixed terminals. Ceramic tube winding copper nickel or nickel-chromium alloy resistance wire. Surface coated with moisture-resistant, heat-resistant, non-corrosive, non-flammable coatings (such as silicone, epoxy, cement, glazed porcelain, etc.). After high temperature treatment, the resistor dried and insulation fixed, then fitted with fixed foot frame.

Due to good flexibility, (DRB20) can be made of multi-terminal, low inductive resistance, semi-adjustable type of various types of resistors. Resistance range from 1.7Ω to 75KΩ, with power ranges from 8W to 500W, and optional tolerance accuracy of ±1%、±5%、±10%. Size of cylindrical ceramic tube matches with industry standards .

Tubular series power-glaze wire wound resistor (DRB20) widely used as brake resistors, bleeder resistors, aging resistors, brake resistors. According to different occasions, but also can be called brake resistors, discharge resistors, load resistors, current limiting resistors, charging resistors or discharge resistors. Non-inductance series adopts Ayrton Perry winding method to eliminate inductance parasitic effect, so as to minimize inductance, suitable for high energy consumption, high-temperature environment.

Be glazed coating protection, not afraid of external mechanical strength and dust environment. Not only large power and strong, shock-resistant, but also features good heat dissipation. This (DRB20) is easy to install and use. This is suitable for a variety of applications. More than 1.2 times the same specifications or requirements of peer production, more power, can be long time loading and impact. Applications include industrial machinery, load testing, power distribution, instrumentation and automation control devices.

Direct Electronics (DRB20) vitreous enameled power wirewound resistors meet RoHS compliant, lead-free standard and short production cycle. Those Products widely used in power tools, switch applications, power supplies, welding machines, high voltage applications, consumer product applications, home entertainment, home appliances products. For the customized special applications, please contact our sales to discuss the details.

Download complete datasheet: Vitreous Enameled Power Wirewound Resistors (DRB20)
Link to more tube-mounted power wirewound resistor series: Smooth Wirewound Tubular Power Resistor (DR) and Smooth Wound Power Adjustable Resistors (DRS)

Features:
  1. Small size, high power.
  2. Glaze coating, simple structure, easy to install.
  3. Fixed resistance and adjustable resistance optional.
Applications:
  1. Electric tools, Consumer product applications.
  2. Power supply, high voltage applications.
  3. Welding machine, switch applications.
Power Wirewound Glaze Resistors (DRB20) Dimensions (Unit: mm)
Power Wirewound Glaze Resistors (DRB20) Dimensions
Power Wirewound Glaze Resistors (DRB20) Dimensions (Unit: mm)
Power Wirewound Glaze Adjustable Resistors (DRB20-T) Dimensions
Power Wirewound Glaze Adjustable Resistors (DRB20-T) Dimensions (Unit: mm)
Type Dimensions (mm)
L D d H h L1 K b t d1
DRB20(T*)-8 35±1.5 14±2 5.5±0.5   28.5±2.5     3.5±0.8 4.5±1 2±0.8
DRB20(T)-10 41±1.5 14±2 5.5±0.5 31±3 28.5±2.5 20±2 6±2 3.5±0.8 4.5±1 2±0.8
DRB20(T)-16 45±1.5 17±2 8±0.5 34±3 31±2.5 23±2 6±2 3.5±0.8 4.5±1 2±0.8
DRB20(T)-20 51±2 17±2 8±0.5 34±3 31±2.5 30±3 6±2 3.5±0.8 4.5±1 2±0.8
DRB20(T)-25 51±2 21±2.5 12±0.6 39±3 35±2.5 30±3 6±2 3.5±0.8 4.5±1 2±0.8
DRB20(T)-30 71±2.2 21±2.5 12±0.6 39±3 35±2.5 44±3 6±2 3.5±0.8 4.5±1 2±0.8
DRB20(T)-40 87±2.2 21±2.5 12±0.6 39±3 35±2.5 57±3   3.5±0.8 4.5±1 2±0.8
DRB20(T)-50 91±2.4 29±3 20±1.1 47±3 43±2.5 60±3 7±2 4.5±1 6±1 2.5±0.8
DRB20(T)-75 140±3.2 29±3 20±1.1 47±3 43±2.5 110±3 7±2 4.5±1 6±1 2.5±0.8
DRB20(T)-100 170±3.5 29±3 20±1.1 47±3 43±2.5 140±3 7±2 4.5±1 6±1 2.5±0.8
DRB20(T)-150 215±4 29±3 20±1.1 47±3 43±2.5 185±3 7±2 4.5±1 6±1 4±0.8
DRB20(T)-200 215±4 38±3 38±3 61±3 58±2 160±3 7±2 8±1 9±1 4±0.8
DRB20(T)-250 266±4 30±2 30±2 50±3 50±2 210±4 7±2 8±1 9±1 4±0.8
DRB20(T)-300 266±4 36±2 36±2 58±3 58±2 210±4 8±2 8±1 9±1 4±0.8
DRB20(T)-400 250±4 54±2 54±2 76±3 77±3 180±4 10±2 8±1 16±1 8±1
DRB20(T)-500 300±4 54±2 30±2 76±3 77±3 230±4 10±2 8±1 16±1 8±1
T* : Adjustable Wirewound Resistors。
Power Wirewound Vitreous Enameled Resistors (DRB20) Specification
Type Rating Power (W) Resistance (Ω) Weight (g)
DRB20 DRB20-T Fixed Adjustable
DRB20
(DRB20T)
8 5.1-3.3K   23  
10 5.1-10K 5.1-200 17 34
16 5.1-15K 5.1-220 36 42
20 5.1-20K 5.1-430 44 52
25 10-24 10-510 57 68
30 10-30K 10-1K 80 90
40 20-51K 20-1.2K 98 110
50 24-56K 20-1.5K 132 150
75 20-51K 24-2K 253 270
100 24-62K 20-4.3K 286 200
150 20-75K 20-4.3K 385 300
200 4.7-68K 5.1-4.3K 475 400
250 4.7-68K 5.1-4.3K 510 530
300 1.7-68K 5.1-4.3K 630 650
400 4.7-75K 6.2-5.1K 1000 1050
500 4.7-75K 6.2-5.1K 1340 1400
Power Wirewound Enameled Resistor (DRB20) Performance
Test Item Characteristics Test Methods
Solderability Even sticky tin HiSnPb39, 75W Soldering iron method, tinning
Insulation resistance >20MΩ/cm2 500V DC test voltage
Insulation voltage No breakdown, arcing 2000V DC or 50Hz AC peak with the same
Body strength ΔR ≤ ± (1%R + 0.05Ω) ≤40W Loading 30N, ≥50W Loading 100N
Vibration ΔR ≤ ± (1%R + 0.05Ω) Frequency 10-500Hz, Acceleration 98m/s2, 1h
Collision test ΔR ≤ ± (1%R + 0.05Ω) Frequency 40-80 次/min, Acceleration 245m/s2, 2000 times
Temperature Rise <325°C Apply rated power Load
Rapid temperature changes ΔR ≤ ± (2%R + 0.1Ω) θ A=-55°C θ B=+200°C, 5 Cycles
Constant Damp Heat ΔR ≤ ± (2%R + 0.1Ω) Temperature 40±2°C, Temperature 93±2%RH, 96h
Over loading ΔR ≤ ± (2%R + 0.1Ω) Apply 10 times the rated power load 5s
Room temperature durability ΔR ≤ ± (5%R + 0.1Ω) Apply rated power load 1000h
Determination of End Resistance Value of (DRB20-T)

  1. Resistance Range means you can choose one maximum resistance value (Max. Pickable Resistance / End resistance value)
    at one of DRB20-T, 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 DRB20-T:

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

Product type means one of FVR, DQS, DSRA, DSRB, BSR, BSQ, DRB20-T.
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.

Power Wirewound Vitreous Glaze Resistors - (DRB20) Order Codes
DRB20 T - 8W 100R J
 
Type
DRB20
Adjustable Resistance
  Fixed Resistance
T Adjustable Resistance
 
Rating Power (W)
8W 8W
20W 20W
100W 100W
500W 500W
Resistance Value (Ω)
10R 10Ω
110R 110Ω
1K1 1.1KΩ
10K 10KΩ
Resistance Tolerance
F ±1%
J ±5%
K ±10%
Inductance
Inductance
N Non-Inductance