0142 OHMITE Wirewound Power Rheostat Resistor

Review OHMITE Series Model Wirewound Power Rheostat Variable Resistor Vintage Us

The Ohmite 0142 Wirewound Power Rheostat Resistor is a versatile and high-performing electrical component designed for precise resistance adjustment in various applications. This rheostat resistor boasts a wirewound construction, which provides superior heat dissipation and stability compared to other resistor technologies.

The Ohmite 0142 is a three-terminal device, featuring a fixed resistor element, a wiper, and a rotary end cap. The resistor element is composed of high-quality, heavy-gauge, nickel-chrome wire, wound in a compact spiral configuration. This design not only ensures excellent power handling capacity but also offers a relatively low temperature coefficient, allowing for stable resistance adjustment even under varying temperatures.

The Ohmite 0142 Wirewound Power Rheostat Resistor is suitable for use in applications requiring heavy current handling, as it can dissipate power up to 25 watts continuously at a maximum operating temperature of 85 C (185 F). The resistor offers a resistance range of 0.25 ohms to 12 ohms, making it suitable for a wide range of applications, including motor speed control, power supply regulation, and load testing.

The rheostat features a black, epoxy-coated ceramic housing, which offers excellent insulation and protection against environmental factors. The housing also features a knurled end cap, providing a comfortable grip and easy adjustment of resistance settings. The resistance wiper is made of high-quality carbon, ensuring reliable and stable contact with the resistor element, even during extended use.

The Ohmite 0142 Wirewound Power Rheostat Resistor is designed for easy installation and integration into various electrical systems. It features a standard 1/4-inch mounting flange and can be mounted either vertically or horizontally, depending on the application requirements. The resistor also comes with leads that can be easily connected to the power source and the load.

In summary, the Ohmite 0142 Wirewound Power Rheostat Resistor is a robust and reliable electrical component suitable for heavy current applications that require precise resistance adjustment. Its wirewound construction ensures excellent power handling capacity, stability, and temperature stability, while its epoxy-coated ceramic housing offers excellent insulation and protection against environmental factors. With a resistance range of 0.25 ohms to 12 ohms and a maximum power dissipation of 25 watts, this resistor offers versatility and high performance for a wide range of applications.

A wirewound power rheostat resistor, specifically the Ohmite 0142 model, is a type of adjustable resistor that is commonly used in various electrical applications to control power or current flow. Here are some pros and cons of buying this resistor:

1. High Power Handling: The Ohmite 0142 resistor can handle high power levels, making it suitable for heavy-duty applications.

2. Precise Current Control: The wirewound design of this resistor provides precise current control, making it an ideal choice for applications that require fine adjustments.

3. Long-lasting: The wirewound design of this resistor makes it more durable and longer-lasting compared to other types of resistors.

4. Temperature Stability: The Ohmite 0142 resistor offers good temperature stability, which is essential for maintaining consistent resistance values and accurate readings.

1. Size and Weight: The wirewound design of this resistor makes it larger and heavier compared to other types of resistors, which can be a disadvantage in space-constrained applications.

2. Cost: The Ohmite 0142 resistor is typically more expensive than other types of resistors due to its high power handling capabilities and precise current control.

3. Limited Resistance Range: The resistance range of this resistor is limited compared to other types of resistors, making it less versatile for a wider range of applications.

The Ohmite 0142 wirewound power rheostat resistor is a high-performance component suitable for applications that require precise current control and high power handling capabilities. Its durability and temperature stability make it a reliable choice for heavy-duty applications. However, its larger size, higher cost, and limited resistance range may make it less suitable for some applications.

If you are looking for a high-performance resistor for heavy-duty applications that require precise current control and temperature stability, the Ohmite 0142 wirewound power rheostat resistor is an excellent choice. However, if you have space constraints or require a wider resistance range, you may want to consider other types of resistors such as thin film or thick film resistors.

Details:

Features a ceramic body and robust metal adjustment shaft, clearly labeled with Ohmite mfg co series. Vintage Ohmite series a model 0142 wirewound power rheostat, industrial variable resistor made in the USA. This component is ideal for restoration of vintage electronics, custom projects, or as a collectible enthusiasts retro electrical hardware. Shows visible signs of wear, rust on terminals, and accumulated dirt, but appears structurally intact.

Offers reliable heavy-duty performance for high-power use.

specifications passivecompos:

• brand: Ohmite
• mpn: 0142
• type: Rotary Rheostat
• termination style: Lug
• material: Ceramic
• country of origin: United States
• shape: Round
• unit type: Unit

general passivecompos:

• category: Business & Industrial > Passive Components > Potentiometers Variable Resistors > Rheostats

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• sold #: 4
• in stock #: 2
• prices: $20.00–$50.00
• item condition: Used
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• availability: in stock
• started: april 17, 2026

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