TOKEN
RMG50 To-Style Power Resistors
To-Style
Power Resistors
To-Style Power Resistors Keeps Its Cool
Preview
Providing design engineers with an open screened substrate device for applications requiring superior thermal
performance, Token Electronics has developed a non-moulded power resistor rated up to 50W.
Designated the RMG50 Series, the resistor is housed in a TO-220 opened screened substrate package, and
features an insulated tapered venturi bonded to the substrate for maximum heat dissipation. The design of the
RMG50 Series resistor allows for three methods of heat dissipation, resulting in exceptional power handling
characteristics.
The chimney-shaped tapered venturi is attached to the ceramic substrate and convection forces hot air up the
‘neck’ of the chimney and away from the resistor face of the component.
The power resistor utilises all three methods of heat dissipation, including conduction through the heatsink tab,
radiation from the resistor surface, and convection through the venturi element. Typical applications for the
RMG50 resistor include higher wattage switch-mode power supply circuits, motor control and drive circuits,
inverters and industrial power equipment.
Resistance ranges from 0.05Ω to 10KΩ, with tolerances of ±0.50% and ±10% and operating temperature range is
-65°C to +150°C. The RMG50 Series TO-220 provides customers requiring more wattage in a smaller package
with an excellent alternative.
Token Electronics will also produce devices outside these specifications to meet customer requirements, with
comprehensive application engineering and design support available for customers worldwide. Contact us with
your specific needs.
Applications
- UPS.
- Voltage Regulation.
- Pulsing applications.
- Switching Power Supplies.
- Non-inductive design for high frequency.
Features
- Electrically Isolated Case.
- TO-220 Style Power Package.
- Low ohm value, non-inductance design
- Molded Case for Protection and Easy to Mount.
- 50 Watt at 25°C Case Temperature Heat Sink Mounted.
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Dimensions (Unit: mm)
RMG50 To-Style Power Resistors
W
T
D1
D
C
H
B1
T1
B
T2
T1
T2
B
B1
C
D
D1
1.14~1.40
Type
RMG50
W
10.15~10.67
H
T
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
Electrical Characteristics Specifications
Resistance Range
0.05Ω~1Ω
2Ω~5Ω
5Ω~10Ω
11Ω~10KΩ
Resistance Tolerance
±5.00%
±10.0%
±1.00%
±5.00%
±10.0%
±1.00%
±5.00%
±10.0%
±0.50%
±1.00%
±5.00%
±10.0%
TCR(PPM/°C)
-
±200
±100
±200
±50
±100
±200
Note: Operating Voltage:350V Max. Dielectric Strength: 1800VAC
Insulation Resistance: 10GΩmin. Working Temperature Range:-65°C to +150°C
Resistance Value < 1Ω is Available
Power Derating Curve
Derating Curve
100
Rated Power (%)
80
60
40
20
0
0
25
50
75
100
125
150
175
Case Temperature (°C)
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Environmental Characteristics
Test Item
Temperature Coefficient of
Resistance
Short Time Overload
Load Life
Humidity (Steady State)
Thermal Shock
Terminal Strength
Vibration, High Frequency
RMG50 To-Style Power Resistors
Specification
Test Method
10Ω and above, ±50ppm/°C
Referenced to 25°C, ΔR taken at +105°C
1Ω and 10Ω, (±100ppm)/°C
2 times rated power with applied voltage not to exceed
Δ R±0.3%
1.5 times maximum continuous operating voltage for 5
seconds.
Δ R±1.0%
MIL-R-39009,2,000 hours at rated power.
MIL-STD-202F, Method 103B
Δ R±0.5%
40°C, 90~95%RH, RCWV 1.5hours ON, 0.5hours
OFF. total 1000~1048 hours.
MIL-STD-202, Method 107G.
Δ R±0.3%
-65°C~150°C,100 cycle
Δ R±0.2%
MIL-STD-202, Method 211, Cond.A(Pull Test) 2.4N.
Δ R±0.2%
MIL-STD-202, Method 204, Cond.D.
Note: 1.Lead Material: Tinned Copper. Maximum Torque: 0.9 Nm.
2.Without a Heat Sink, When in Free Air at 25°C, the RMG50 is Rated for 3W.
3.The Case Temperature is to be used for the Definition of the Applied Power Limit.
4. The Case Temperature Measurement Must be Made with a Thermocouple Contacting the Center of the Component
Mounted on the Designed Heat Sink.
5.Thermal Grease Should be Applied Properly.
How to Order
RMG
Part Number
50
J
P
D
Code
10R
TCR
TCR (PPM/°C)
D
E
F
-
Power Rating
Resistance Tolerance (%)
Code
D
F
G
J
K
Resistance Tolerance
±0.5%
±1%
±2%
±5%
±10%
Package
Tube
Bulk
±50PPM/°C
±100PPM/°C
±200PPM/°C
No specified
Resistance
0.1Ω
10Ω
Resistance
Code
0R1
10R
1K
10K
Package
Code
T
P
1KΩ
10KΩ
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