138A1065P21 OHMITE Rheostat

Review OHMITE Rheostat No.0328 Model 50 Watt .14a 2500 Ohm

The Ohmite 138A1065P21 Rheostat, also known as No. 0328 50 14A 2500, is a versatile and reliable electrical component designed for precise voltage and current regulation. This rheostat is manufactured by Ohmite, a leading global supplier of precision resistors and rheostats.

This particular model, the 138A1065P21, is a cartridge type rheostat with a 1/4-20 threaded base, making it suitable for various applications. The rheostat has a resistance range of 1.5 ohms to 15 ohms, making it suitable for regulating currents up to 14 amperes. The power rating of this rheostat is 2500 watts, making it capable of handling significant power loads.

The Ohmite 138A1065P21 Rheostat is constructed with high-quality materials, ensuring durability and longevity. It features a metal housing that provides excellent heat dissipation, ensuring the rheostat remains cool during operation, even under heavy loads. The wiper contact material is made of gold over nickel, providing excellent electrical conductivity and long-term reliability.

The rheostat has a taper control knob that allows for precise voltage and current regulation. The control knob is marked with clear graduations, making it easy to set and monitor the desired voltage or current level. The rheostat also features a built-in current limiting feature, which helps protect against overcurrent conditions.

The Ohmite 138A1065P21 Rheostat is suitable for use in a wide range of applications, including industrial automation, laboratory equipment, HVAC systems, and power supplies. It is also RoHS compliant, ensuring that it meets the latest environmental regulations.

In summary, the Ohmite 138A1065P21 Rheostat is a high-performance electrical component designed for precise voltage and current regulation. It features a wide resistance range, high power rating, and durable construction, making it suitable for use in various applications. Its taper control knob provides precise regulation, while its built-in current limiting feature ensures safe operation.

Pros and Cons of Buying Ohmite 138A1065P21 Rheostat No. 0328 50 14A 2500

The Ohmite 138A1065P21 Rheostat No. 0328 50 14A 2500 is a fixed wirewound rheostat designed for heavy-duty applications. This rheostat is widely used in various industries for controlling current flow in electrical circuits. In this article, we will discuss the advantages and disadvantages of buying this rheostat model.

1. High Current Capacity: This rheostat can handle a maximum current of 14A, making it suitable for heavy-duty applications where high current is required.

2. Voltage Rating: With a voltage rating of 2500V, this rheostat can be used in high voltage applications.

3. Durable Design: The wirewound design of this rheostat provides excellent heat dissipation, making it suitable for continuous operation in harsh environments.

4. Precise Current Control: The Ohmite 138A1065P21 Rheostat offers precise current control, allowing for fine adjustments in electrical circuits.

5. Rugged Construction: This rheostat is built to withstand the rigors of industrial applications, making it a reliable choice for heavy-duty use.

1. Size and Weight: This rheostat is relatively large and heavy compared to other models, which may make it less ideal for applications where space is limited.

2. Cost: The Ohmite 138A1065P21 Rheostat is more expensive than some other rheostat models due to its high current and voltage rating.

3. Manual Control: This rheostat is manually controlled, which may not be suitable for applications where automatic control is required.

The Ohmite 138A1065P21 Rheostat No. 0328 50 14A 2500 is a high-performance rheostat designed for heavy-duty applications. Its advantages include high current and voltage capacity, precise current control, durability, and rugged construction. However, its disadvantages include its large size and weight, higher cost, and manual control.

If you require a heavy-duty rheostat for industrial applications where precise current control and high current and voltage capacity are essential, the Ohmite 138A1065P21 Rheostat No. 0328 50 14A 2500 is an excellent choice. However, if you have limited space or require automatic control, there may be other rheostat models that better suit your needs. It is essential to consider all factors, including application requirements and budget, before making a purchasing decision.

Details:

One Ohmite rheostat as shown in the photos.

specifications passivecompos:

• brand: Ohmite
• mpn: 138a1065p21
• power rating: 50 W
• resistance rating: 2500

offer passivecompos:

• started: january 17, 2026
• options: ship-to-home
• availability: in stock
• best offers: true
• prices: $85.00–$425.00
• item condition:
  • New – Open box
  • New
• in stock #: 5
• sold #: 14

payments passivecompos:

• other
• wallet: google-pay
• credit card: discover

returns passivecompos:

• time: 30 days
• policy: returns accepted
• method: money back
• paid by: seller

seller passivecompos:

• # reviews: 1878
• city: buffalo, wyoming
• rating: 100.0%

shipping passivecompos:

• type: fixed
• class: standard
• service: usps ground advantage
• transit: 5-11 days
• carrier: usps

general passivecompos:

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