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CHARACTERISTICS
TAH Series
20 Watt TO220 Package
Thick Film Power
Resistance Range
0.05Ω to 10KΩ, other values available upon
request
Tolerance
<0.1Ω: 5% only
0.1Ω-1MΩ: 5% std.; 1% available
Temperature
Coefficient
Referenced to 25°C, ∆R taken at +105°C;
1 to 10Ω: ±(100ppm+0.002Ω)/°C
10Ω & up: ±50ppm/°C
Max Operating
Voltage
350V
Dielectric Strength
1,800 VAC
Power Rating
20W @ 25°C case temperature; see derating
curve, below
Insulation Resistance
10GΩ min.
Momentary Overload
2x rated power for 5 seconds where applied
voltage ≤1.5 times max. operating voltage.
∆R ±(0.3% + 0.001Ω) max.
Case Material
KMC-125 epoxy
Terminal Material
Copper
Terminal Plating
Lead Free Solder (97% Tin, 3% Silver)
Mounting
Requires the use of a snap-on style heat
sink. A thermal compound should be properly
applied.
Solder Process
The TAH20 cannot exceed 260°C for more
than 10 seconds during soldering process.
Load Life
MIL-R-39009, 2000 Hours
@ Rated Pwr
∆R = ±(1.0%
+ 0.001) Ω
Thermal Shock
MIL-R-STD-202, Method
107, Cond. F
∆R = ±(0.3%
+ 0.001) Ω max
High Freq
Vibration
MIL-R-STD-202, Method
204, Cond. D
∆R = ±(0.2%
+ 0.001) Ω max
Terminal Strength
MIL-R-STD-202, Method
211, Cond. A (Pull Test)
2.4N
∆R = ±(0.2%
+ 0.001) Ω max
Moisture
Resistance
MIL-R-STD-202, Method
106
∆R = ±(0.5%
+ 0.01) Ω max
Derating
175
100
Percent Rated Power
Bottom of base plate Temperature, °C
60
20
0
050 100 15025 75 125
80
40
Rated Power, Watts
20/35
16/28
12/21
8/14
4/ 7
0
TAH/TCH
TCH
TAH
The TAH20 is a completely encapsulated
thick film resistor in the TO220 package
outline. Rated for 20 watts @ 25°C case
temperature, these resistors are elec-
trically isolated, and molded in a high
temperature case.
Designed for heat sink mounting,
the symmetrical package is ready for
use with snap-on style heat sinks (we
recommend use of thermal grease). The
TAH20 Series has very low inductance,
and available in a wide range of resis-
tance values in standard 5% tolerance.
1% tolerance available by special order.
FEATURES
• 20 Watt Power Rating at
25°C Case Temperature
• High Pulse Tolerant Design
• Quick-snap Molded Package
• Very Low Inductance Design
• Resistor Package Electrically
Isolated from Heat Sink
• Low Thermal Resistance to
Heat Sink @ RTH<6.25°C/W
• Tube Packaging Available
APPLICATIONS
• Frequency Conversion
• High Frequency Balancing
• Snubbers
(continued)
