Standard part numbers Power test data with various heat sinks Datasheet in PDF for printing Suggested Heatsinks

TCH Series

Ohmite's TCH35 TO220 package resistor provides 35 watts of steady state power when properly used in today's well defined heat sink applications.

These very low inductance resistors are built under proprietary processes that deliver more power handling capability than other TO-220 package resistors of similar size.

Standard lead forms are provided for manual or automatic insertion.

A single screw mounting tab connects to the heat sink and should be accompanied by the use of a thermal compound. The TCH35 Series offers a low thermal resistance to the heat sink of <4.28°C/W.

TEST DATA

Load Life	MIL-R-39009, 2000 Hours @ Rated Pwr	delta-R = ± (1.0% + 0.01) ohm
Thermal Shock	MIL-R-STD-202, Method 107, Cond. F	delta-R = ± (0.3% + 0.01) ohm max
High Frequency Vibration	MIL-R-STD-202, Method 204, Cond. D	delta-R = ± (0.2% + 0.01) ohm max
Terminal Strength	MIL-R-STD-202, Method 211, Cond. A (Pull Test) 2.4N	delta-R = ± (0.2% + 0.01) ohm max
Moisture Resistance	MIL-R-STD-202, Method 106	delta-R = ± (0.5% + 0.01) ohm max

APPLICATIONS

• Switching Power Supplies
• Low & High Frequency Snubbers

• 35W Power Rating @ 25°C
• Very Low Inductance Design
• Manufactured in an ISO 9000 Registered Facility
• Single Screw Mounting Simplifies Heat Sink Attachment
• Low Thermal Resistance to Heat Sink @ R_TH <4.28°C/W
• Resistance Element is Electrically Insulated from Metal Heat Sink Mounting Tab

Electrical

• Resistance Range: 1 ohm to 10K ohm (higher values on request subject to derating)
• Resistance Tolerance: ±1% to ±10%, 5% standard (0.5% available on request)
• Temperature Coefficient: Referenced to 25°C, delta-R taken at +105°C
  10 ohm and above ±50 ppm°C
  For under 10 ohms:

  0R6 - 9R9	100PPM
  0R4 - 0R59	150PPM
  0R2 - 0R39	250PPM
  0R1 - 0R19	500PPM
  0R05 - 0R09	1000PPM

• Max. Operating Voltage: 350V
• Dielectric Strength: 1800 VAC
• Insulation Resistance: 10G ohm min.
• Momentary Overload: 2x rated power for 5 seconds as long as the applied voltage </=1.5 times the continuous operating voltage, where delta-R ±(0.3% + 0.01 ohm) max
• Terminal Material: Copper
• Terminal Plating: Lead Free Solder (97% Tin, 3% Silver)
• Maximum Torque: 0.9 Nm
• Power Rating: 35 Watts @ 25°C, Case Temperature. See Derating Curve
• Working Temperature Range: -55°C to +175°C
• Solder Process: The TCH35 cannot exceed 260°C for more than 10 seconds during soldering process.

HEAT SINK POWER COMPARISON

HOW TO ORDER

TCH35P100RJE TCH35P10K0JE TCH35P10ROJE TCH35P150RJE TCH35P15R0JE TCH35P1K00JE TCH35P1K50JE TCH35P1R00JE TCH35P1R50JE TCH35P200RJE TCH35P20R0JE TCH35P220RJE TCH35P22R0JE TCH35P240RJE

TCH35P24R0JE TCH35P2K00JE TCH35P2K20JE TCH35P2K40JE TCH35P2R00JE TCH35P2R20JE TCH35P2R40JE TCH35P330RJE TCH35P33R0JE TCH35P390RJE TCH35P39R0JE TCH35P3K30JE TCH35P3K90JE TCH35P3R30JE

TCH35P3R90JE TCH35P470RJE TCH35P47R0JE TCH35P4K70JE TCH35P4R70JE TCH35P510RJE TCH35P51R0JE TCH35P5K10JE TCH35P5R10JE TCH35P5R60JE TCH35P750RJE TCH35P75R0JE TCH35P7K50JE TCH35P7R50JE

TCH35PR100JE TCH35PR150JE TCH35PR200JE TCH35PR220JE TCH35PR240JE TCH35PR330JE TCH35PR390JE TCH35PR470JE TCH35PR510JE TCH35PR560JE TCH35PR750JE TCH35PRO50JE