POWER RESISTOR | Model number | Types | Datadheet


when a current is flowing into the resistor electrical energy is converted into heat. The heat is generated from the components is possess some resistance in the circuit, and this heat is dissipated into the air as heat this is called power dissipation.

The power dissipation depends on the power source and devices to handle the power.

If it is a quarter-watt resistor handle the high power rated supply, after some time it dissipates the power into heat and getting damage. If we consider the power resistor it can handle more, because power resistors  are designed with in-housed heat sinks

What is Power Resistor

Power Resistor works normally like a Resistor, but it is capable of withstanding and dissipating 5 Watts or more power. They are designed with housed in a heat sink to handle more heat with power. These are available in different types of power package styles TO-220, T-247, and TO-263, TO-163. For PCB surface-mounted TO-263, TO-163, and for Through-hole mounted TO-220, T-247 packages are available. Power Resistors construction includes thick filmCeramic, Thin film, Carbon, Wire-wound some more are available

Model number: MCTR100JDD6801

Other names:  Thick film PCB mount resistors

Other related devices: AP101100WTO-247, AP72520WTO-263, PWR163S-25-10R0JE.



What is the use of Power Resistor?

Power resistors are designed to withstand a large amount of power and dissipate a large amount of power. Power resistors are mostly used in industries, power plants, or any application that can handle the high power ratings. Power resistors are made from a material that has high thermal, conductivity that allows efficient cooling with heat sink elements.

Part Number Explanation

  1. MCTR – Series Type.
  2. 100 – Power in Watts (100W).
  3. J- Resistance tolerance (F= ±1%, J=±5%, K= ±10%).
  4. D- Package Code(B-Bulk, D-tube).
  5. D-TCR (PPM/ͦ C) D: ±50, E: ±100, F: ±200, G: ±300.
  6. 6801- Resistance (R100: 0.1Ω, 0100:10 Ω, 6801: 6.8kΩ, 4700: 470 Ω,1001: 1000 Ω, 1002: 10000 Ω)


    1.     100W at 25ͦ C temperature with heat sink mounted
2.      Single M3 screw mounted through the heat sink
3.      Though-hole PCB mounted
4.      Electrically isolated case
5.      Molded-case for Easy to mount and protection
6.      ROHS complaint.

Electrical Characteristics

  .   1.   Resistance value: 6.8 KΩ
2.   Power rating:100W
3.   Operating Voltage: 700V max.
4.   Operating Temperature: -65ͦ  C to +175ͦ  C
5.   Resistance case style/power package: TO-247
6.   Dielectric Strength: 1800V ac up to 60 seconds.
7.   Insulation Resistance: 10GΩ  

 Internal Parts


1. Alumina Substrate

2. Resistor Layer

3. Lead

4. Molding


Depends on the rated power (ex:100Watt) of the load, we connect the load to any power source, if any case the voltage or current exceeds its rated power (VI) it leads to damage to the product/load.                 

NOTE: This power resistor belongs to Through-hole mounted T-247. Thick film construction.

Types of power resistors

 Wire wound power resistors

    Wire wound resistors are made by winding a metal wire around a strong structure, regularly made of clay, fiberglass, or plastic. Metal covers are appended to the furthest limit of the winding and metallic leads are joined to the closures. The finished result is frequently covered with a non-conductive paint or veneer to offer some assurance from the climate. Wire wound resistors can be worked to withstand high temperatures, in some cases up to 450 °C. These resistors are frequently worked to tight resiliences because of the material utilized, a compound of nickel and chrome called Nichrome.

Grid-based power resistors

Grid-based resistors are huge lattices of metal strips associated between two cathodes. They differ in size, yet can be similarly huge as a fridge. It isn't unprecedented to see lattice resistors esteemed at under 0.04ω and can withstand flows of more than 500 amperes. They are utilized as brake resistors and burden banks for railroad vehicles, nonpartisan establishing resistors, load testing of generators, and consonant separating for electric substations
  • SMD based power resistors
  • Liquid Rheostats


  •            Voltage Regulation.
  •       Heater
  •       Current limiting
  •       Rectifiers
  •       Snubber circuits
  •       Motor drivers.


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