TDH35 Series
TO220 35 Watt Thick Film Power Resistors for
Surface Mount, Including Metal Tab
10.1mm
45°
0.5mm
4.5mm
1.1mm
±0.5
0.5mm
8.6mm
1.5mm
±0.5
4.8mm
0.5mm
5.08mm
1.5mm
±0.5
7.87mm
Land
Pattern
FEATURES
• 35 Watt power rating at 25°C
• SMD - TO-220 package configu-
ration
• Heat resistance to cooling plate:
Rth <4.28 °K/W
• A molded case for environmental
protection.
• Resistor element is electrically
insulated from the metal sink tab.
SPECIFICATIONS
Material
Lead Material:
German Silver
(Alpacca)
Electrical
Resistance Range:
0.1Ω to 10KΩ
other values on request
Tolerance:
±1% to ±10% (0.5% on
request)
Max. Operating Voltage:
350V
Insulation Resistance:
10GΩ
min.
Power Rating:
Depends upon
case temperature. See Derating
Curve.
Working Temperature Range:
-
55°C to +175°C
8.51mm
1.4mm
0.9mm
2.63mm
3.81mm
1.65mm
2.54mm
DERATING
100
35
60
21
Soldering note: During surface mount soldering the soldering temperature profile must not
cause the metal tab of this device to exceed 245°C!
40
14
PERFORMANCE CHARACTERISTICS
Derating
Dielectric Strength
Max. Mounting Torque
Operating Temperature Range
Temperature Coefficient
100% @ 25°C to 0% @ 150°C
curve referenced to case temperature
1,800VAC
0.9Nm
-55°C to +150°C
10Ω and above, ± 50ppm/°C, referenced to
25°C,
∆R
taken at +105°C. Between 1Ω and
10Ω, ± (100ppm+0.002Ω)/°C, referenced to
25°C,∆R taken at +105°C.
20
7
0
0
25
50
75
100
125
Case Temperature,
°C
150
175
0
Derating (thermal resistance): 0.23W/°K (4.28°K/W). The case temperature is to be used for
purposes of establishing 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 propperly.
TEST DATA
Load Life
Moisture Resistance
(MIL–R–39009, 2,000 hours
(MIL–Std–202, Method 106)
∆R
±(1.0% +0.01Ω)
∆R
=(0.5% +0.01Ω)
max.
∆R
±(0.3% + 0.01Ω)
max.
∆R
=(0.3% + 0.01Ω)
max.
∆R
=(0.2% + 0.01Ω)
max.
∆R
=(0.2% + 0.01Ω)
max.
ORDERING INFORMATION
T D H 3 5 P R 1 0 0 J
Style
Ohms
R = Decimal
Example:
R100 = 0.10
1R00= 1.0
10K0= 10,000
Tolerance
F = 1%
J = 5%
K = 10%
Short Time Overload
(2 times rated power with applied
voltage not to exceed 1.5 times
maximum continuous operating
voltage for 5 seconds)
Thermal Shock
Terminal Strength
Vibration,
High Frequency
(MIL–Std–202, Method 107,
Cond. F)
(MIL–Std–202, Method 211,
Cond. A (Pull Test) 2.4N)
(MIL-STD-202, method 211,
cond. A (pull test) 2.4N)
1
Ohmite Manufacturing Company
3601 Howard St., Skokie, IL 60076 • Tel. 847-675-2600 • Fax 847-675-1505 • www.ohmite.com • ohmite@wwa.com
Rated Power, W
TO220 style power package for surface mounting applications; 35W power rating at 25°C case
temperature
Percent Rated Power
80
28
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