• Features:
    20 Watt at 25°C Case Temperature Heat Sink Mounted.
    TO-220 Style Power Package.
    Molded Case for Protection and Easy to Mount.
    Isolated Case.
    Non Inductive.
  • Applications:
    High Speed Switching Power Supplies.
    Snubber Circuits.
    Load Resistor for Pulse Generators.
    Voltage Regulation.
    VHF Amplifiers.
TO-220 Power Resistors
Derating Curve
TO-220 Power Resistors Derating Curve

Dimensions (Unit: mm)
TO-220 Power Resistors Dimensions
Type W H T T1 T2 B B1 C D D1
RMG20 10.15~10.67 16.00~16.52 2.92~3.44 0.40~0.60 1.52~2.04 11.43~13.97 2.54~4.06 4.82~5.34 0.66~0.86 1.14~1.40

Electrical Characteristics Specifications
Resistance Range Resistance Tolerance TCR(PPM/°C)
0.05Ω~1Ω ±5.00%
2Ω~5Ω ±1.00%
5Ω~10Ω ±1.00%
11Ω~10KΩ ±0.50%
  • Operating Voltage:350V Max.
  • Dielectric Strength: 1800VAC
  • Insulation Resistance: 10GΩmin.
  • Working Temperature Range:-65°C to +150°C
  • Resistance Value < 1Ω is Available
Environmental Characteristics
Test Item Specification Test Method
Temperature Coefficient of Resistance 10Ω and above, ±50ppm/°C
1Ω and 10Ω, (±100ppm)/°C
Referenced to 25°C, ΔR taken at +105°C
Short Time Overload Δ R±0.3% 2 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds.
Load Life Δ R±1.0% MIL-R-39009,2,000 hours at rated power.
Humidity (Steady State) Δ R±0.5% MIL-STD-202F, Method 103B
40°C, 90~95%RH, RCWV 1.5hours ON, 0.5hours OFF. total 1000~1048 hours.
Thermal Shock Δ R±0.3% MIL-STD-202, Method 107G.
-65°C~150°C,100 cycle
Terminal Strength Δ R±0.2% MIL-STD-202, Method 211, Cond.A(Pull Test) 2.4N.
Vibration, High Frequency Δ R±0.2% MIL-STD-202, Method 204, Cond.D.
  • Lead Material: Tinned Copper.
  • Without a Heat Sink, when in Free Air at 25°C, the RMG20 is Rated for 2.25W.
  • The Case Temperature is to be used for the Definition of the Applied Power Limit.
  • The Case Temperature Measurement Must be Made with a Thermocouple Contacting the Center of the Component Mounted on the Designed Heat Sink.
  • Thermal Grease Should be Applied Properly.
How to Order - TO-220 Power Resistors
RMG 20 J P D 1K
Part Number
Power Rating
Resistance Tolerance
D ±0.5%
F ±1%
G ±2%
J ±5%
K ±10%
T Tube
P Bulk
D ±50PPM/°C
E ±100PPM/°C
F ±200PPM/°C
- No specified
0R1 0.1Ω
10R 10Ω
1K 1000Ω
10K 10000Ω

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