tDh series
35 Watt DPAK Package
Thick Film Power Surface Mount
Ohmite’s TDH resistor is an economi-
cal solution to intermediate power
application design requirements.
TDH’s reliable thick film on alumina
substrate construction can be easily
heat sinked for higher power perfor-
mance. TDH resistors are ideal for
pulse-loading, pre-charge, bleeder,
and snubber applications.
characteristics
Terminal
Copper
Terminal Plating
Lead Free Solder (97% Tin, 3% Silver)
Resistance Range
0.05Ω 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 der-
ating curve.
DPAK style power package for surface
mounting applications; 35W power rating
at 25°C case temperature.
Working Temperature
-55°C to +175°C
Range
Solder Process
The TDH35P cannot exceed 220°C (260°C
for the TDH35H) for more than 10 seconds
during soldering process.
Derating
100% @ 25°C to 0% @ 150°C curve refer-
enced to case temperature
Dielectric Strength
1,800VAC
Operating Temperature
-55°C to +150°C
Range
Temperature Coefficient
10Ω and above, ±50ppm/°C, referenced to
25°C, ∆R taken at +105°C. Between 1 and
10Ω, ±(100ppm+0.002Ω)/°C, referenced to
25°C, ∆R taken at +105°C. For under 10Ω:
0R6 - 9R9: 100PPM
0R4 - 0R59: 150PPM
0R2 - 0R39: 250PPM
0R1 - 0R19: 500PPM
0R05 - 0R09: 1000PPM
Inductance
less than 20 nanohenries
Flatness
less than 0.1mm tolerance
Soldering note:
During surface mount soldering the soldering
temperature profile must not cause the metal tab of this device to
exceed 220°C (260°C for the TDH35H)!
Test Condition
Load Life
MIL–R–39009, 2,000 hours
Moisture
MIL–Std–202, Method 106
Resistance
Short Time
2 times rated power with
Overload
applied voltage not to exceed
1.5 times maximum continu-
ous operating voltage for 5
seconds
Thermal Shock
MIL–Std–202, Method 107,
Cond. F
Terminal
MIL–Std–202, Method 211,
Strength
Cond. A (Pull Test) 2.4N
Vibration, High
MIL-Std-202, Method 204,
Frequency
Cond. D
Result
∆R ±(1.0%
+0.01Ω)
∆R =(0.5%
+0.01Ω) max.
∆R ±(0.3%
+0.01Ω) max.
F e at u r e s
• 35 Watt power rating at 25°C
• SMD - DPAK package configu-
ration
• Heat resistance to cooling
plate: Rth <4.28°C/W
• A molded case for environ-
mental protection.
• Resistor element is electrically
insulated from the metal sink
tab.
∆R =(0.3%
+0.01Ω) max.
∆R =(0.2%
+0.01Ω) max.
ΔR =(0.2%
+0.01Ω) max.
Derating
100
80
60
40
20
0
0
25
50
75
100
125
150
Bottom of base plate Temperature,
°C
175
35
28
21
14
7
0
Rated Power, W
Percent Rated Power
Derating (thermal resistance): 0.23W/°C (4.28°C/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.
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
37
tDh series
35 Watt DPAK Package
Thick Film Power Surface Mount
Dimensions
10.1mm
45°
4.5mm
1.1mm
±
0.5
0.5mm
8.6mm
1.5mm
±
0.5
1.5mm
±
0.5
7.87mm
0.5mm
Tape Dimensions
750 pc./reel
4.95mm
16mm
24mm
Land
Pattern
8.51mm
1.4mm
0.9mm
2.63mm
3.81mm
1.65mm
2.54mm
4.8mm
0.6mm
5.08mm
Tol. ±0.2mm unless otherwise noted
o r D e r i n g i n F o r m at i o n
Standard Part Numbers
Ohms
Tape and reel
(optional)
750 per reel
Part Number
5% Tolerance
TDH35PR100JE
TDH35PR150JE
TDH35PR200JE
TDH35PR250JE
TDH35PR300JE
Ohms
25
33
39
Part Number
5% Tolerance
TDH35P25R0JE
TDH35P33R0JE
TDH35P39R0JE
TDH35P47R0JE
TDH35P68R0JE
TDH35P75R0JE
TDH35P100RJE
TDH35P150RJE
TDH35P200RJE
TDH35P250RJE
TDH35P300RJE
TDH35P500RJE
TDH35P750RJE
TDH35P1K00JE
TDH35P1K50JE
TDH35P2K50JE
TDH35P3K00JE
TDH35P5K00JE
T D H 3 5 P R 1 0 0 J E-TR
Style
Package
Modifier
P
= low temp.
H = high temp.
Tolerance RoHS Compliant
Ohms
R = Decimal F = 1%
Non-compliant
J = 5%
Example:
version unavailable
R100
=
0.10 K = 10%
1R00= 1.0
10K0= 10,000
2.0
3.0
5.0
7.5
10
15
20
0.36
0.47
0.50
0.75
1.0
0.10
0.15
0.20
0.25
0.30
TDH35P2R00JE
TDH35P3R00JE
TDH35P5R00JE
TDH35P7R50JE
TDH35P10R0JE
TDH35P15R0JE
TDH35P20R0JE
TDH35PR360JE
TDH35PR470JE
TDH35PR500JE
TDH35PR750JE
TDH35P1R00JE
47
68
75
100
150
200
250
300
500
750
1000
1500
2500
3000
5000
THIS PRODUCT IS DESIGNED FOR
USE WITH PROPER HEATSINKING.
Maximum base plate temperature of the resistor must
be monitored and kept within specified limits to es-
tablish the power rating. Best technique is to attach a
thermocouple to the side of the base plate of the resis-
tor. Temperature of plastic housing or heat sink cannot
be used to establish rating of the resistor.
38
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