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TDH Series Datasheet

35 Watt D2PAK Package Thick Film Power Surface Mount

Res Tdh35 product image

 

Ohmite’s TDH resistor is an economical solution to intermediate power application design requirements. TDH’s reliable thick film on alumina substrate construction can be easily heat sinked for higher power performance. TDH resistors are ideal for pulse-loading, pre-charge, bleeder, and snubber applications.

 

Features

  • 35 Watt power rating at 25°C
  • SMD - D2PAK package configuration
  • Heat resistance to cooling plate: Rth <4.28°C/W
  • A molded case for environmental protection./li>
  • Resistor element is electrically insulated from the metal sink tab.

Characteristics

Copper

Terminals- SnAg, Thermal Header- German Silver/Nickel Silver

0.05Ω to 10KΩ other values on request

±1% to ±10% (0.5% on request)

350V

10GΩ min.

Depends upon case temperature. See der-ating curve.D2PAK style power package for surface mounting applications; 35W power rating at 25°C case temperature.

-55°C to +175°C

The TDH35P cannot exceed 215°C (260°C for the TDH35H)

100% @ 25°C to 0% @ 150°C curve referenced to case temperature

1,800VAC

-55°C to +150°C

Referenced to 25°C, ∆R taken at +105°C10Ω and above: ±50 ppm°CFor under 10Ω:3R to 9R9: 100ppm1R to 2R9: 300ppm0R1 to 0R99: 700ppm0R05 to 0R09: 1000ppm

less than 20 nanohenries

less than 0.1mm tolerance

During surface mount soldering the soldering temperature profile must not cause the metal tab of this device to exceed 215°C (260°C for the TDH35H)!

Condition:

MIL-R-39009, 2,000 hours

Result:

∆R ±(1.0% +0.01Ω)

Condition:

MIL-Std-202, Method 106

Result:

∆R =(0.5% +0.01Ω) max.

Condition:

2 times rated power with applied voltage not to exceed 1.5 times maximum continu-ous operating voltage for 5 seconds

Result:

∆R ±(0.3% +0.01Ω) max.

Condition:

MIL-Std-202, Method 107, Cond. F

Result:

∆R =(0.3% +0.01Ω) max.

Condition:

MIL-Std-202, Method 211, Cond. A (Pull Test) 2.4N

Result:

∆R =(0.2% +0.01Ω) max

Condition:

MIL-Std-202, Method 204,Cond. D

Result:

ΔR =(0.2% +0.01Ω) max.

Derating

Res Tdh35 Graph

 

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.

Dimensions

Res Tdh35 Dimensions

 

Tape Dimensions 

750 pc./reel 

 

Res Tdh35 Tape

Ordering Information

Res Tdh35 Order Info

 

Standard Part Numbers

Ohms: 0.10

Ohms: 0.15

Ohms: 0.20

Ohms: 0.25

Ohms: 0.30

Ohms: 0.36

Ohms: 0.47

Ohms: 0.50

Ohms: 0.75

Ohms: 1.0

Ohms: 2.0

Ohms: 3.0

Ohms: 5.0

Ohms: 7.5

Ohms: 10

Ohms: 15

Ohms: 20

Ohms: 25

Ohms: 33

Ohms: 39

Ohms: 47

Ohms: 68

Ohms: 75

Ohms: 100

Ohms: 150

Ohms: 200

Ohms: 250

Ohms: 300

Ohms: 500

Ohms: 750

Ohms: 1000

Ohms: 1500

Ohms: 2500

Ohms: 3000

Ohms: 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 establish the power rating. Best technique is to attach a thermocouple to the side of the base plate of the resistor. Temperature of plastic housing or heat sink cannot be used to establish rating of the resistor.

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