CMU2521 OHMITE Potentiometer

Review OHMITE New Potentiometer

The Ohmite CMU2521 is a high-quality, linear potentiometer designed for various applications where precise voltage control is essential. This potentiometer comes in a compact and robust cylindrical package, measuring 1.2 inches (30.5mm) in length and 0.5 inches (12.7mm) in diameter.

The CMU2521 features a carbon composition resistive element that ensures linear and stable resistance characteristics over a wide temperature range. The resistance value of this potentiometer is 100k , with a maximum power rating of 0.5 watts. It is suitable for both DC and low-frequency AC applications, making it an excellent choice for volume control in audio systems, voltage regulation in laboratory equipment, or as a variable resistor in circuit design.

The wiper of the potentiometer is made of beryllium copper, ensuring excellent electrical conductivity and durability. The shaft is made of brass, providing a smooth rotational action. The knob, available in various colors, is made of high-impact, UV-stabilized plastic, ensuring a comfortable grip and long-lasting use.

The Ohmite CMU2521 potentiometer offers a minimum rotational torque of 0.05 Nm and a maximum torque of 0.35 Nm. Its resistance tolerance is /- 2%, ensuring precise and accurate voltage control. The temperature coefficient of resistance is 220 ppm/ C ( 45 C to 70 C), which guarantees stable resistance characteristics over a wide temperature range.

This potentiometer comes with a 3-wire configuration, with one wire connected to the fixed terminal, one wire connected to the wiper, and one wire connected to the other terminal. It is RoHS compliant and meets various international safety standards, including UL and CSA. The potentiometer is also available in different resistance values and configurations, catering to various application requirements.

The Ohmite CMU2521 is a popular 3-terminal adjustable potentiometer known for its precision and stability. Here are some pros and cons that might help you decide if this potentiometer is the right choice for your project:

1. Precision: The CMU2521 series potentiometers offer a high degree of precision with a tolerance of 0.5% or better, making them suitable for applications where accurate voltage control is crucial.

2. Stability: These potentiometers have a low TCR (Temperature Coefficient of Resistance) of 50 ppm/ C, ensuring that their resistance value remains consistent over a wide temperature range.

3. Linear Taper: The linear taper design of the CMU2521 ensures that the resistance value changes at a constant rate as the potentiometer is turned, making it easier to control voltage levels.

4. Robust Construction: The potentiometer features a heavy-duty, epoxy-coated construction that provides excellent protection against moisture, dust, and other environmental factors.

5. Wide Resistance Range: The CMU2521 series is available in a wide range of resistance values (25 to 1M ), allowing you to choose the one that best suits your specific application.

1. Cost: Compared to other types of potentiometers, the CMU2521's high precision and stability come at a higher cost.

2. Manual Adjustment: Since it is a manually adjustable potentiometer, it may not be suitable for applications where an automatic or remote control solution is required.

3. Size: The CMU2521 series potentiometers are larger than some other types, which may make them less suitable for applications with space constraints.

The Ohmite CMU2521 potentiometer is an excellent choice for applications that require high precision and stability in voltage control. Its robust construction and wide resistance range further add to its versatility. However, its higher cost and manual adjustment may make it less suitable for some applications. Ultimately, the decision to use the CMU2521 potentiometer depends on the specific requirements of your project and the trade-offs you are willing to make.

If you need high precision and stability in voltage control for your project, and the additional cost and manual adjustment are acceptable, then the Ohmite CMU2521 potentiometer is a recommended option. If cost or size are a concern, you may want to consider alternative potentiometer types, such as trimmer potentiometers or digital potentiometers.

Details:

specifications passivecompos:

• brand: Ohmite
• mpn: Cmu2521

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general passivecompos:

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

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• # reviews: 2015
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• started: july 2, 2025
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