CMU2531 OHMITE Ab

Review OHMITE Type Ab

The Ohmite CMU2531AB is a high-performance, miniature, high frequency current limiter specifically designed for use in Switched Mode Power Supplies (SMPS), Class D Audio amplifiers, and other applications where precise current limiting is essential. This current limiter features a non-linear resistance element with a nominal current rating of 2.5A and a maximum current rating of 5A. This device is designed to limit the output current to a predetermined value while maintaining high efficiency.

The CMU2531AB offers a maximum voltage rating of 600Vrms, ensuring it can handle high voltage applications. It can be utilized in a wide input voltage range of 100VAC to 277VAC, making it adaptable to various power sources. Furthermore, it can operate on a range of frequencies, ranging from a minimum of 15kHz to a maximum of 250kHz, making it a versatile component for various applications.

The Ohmite CMU2531AB is constructed with a ceramic housing, which features a compact size of 25.5mm x 19.5mm, making it ideal for space-constrained designs. It is also RoHS compliant and leads-free, ensuring it adheres to industry regulations and environmentally friendly manufacturing practices. The device has a power dissipation of up to 14.5W and is equipped with a foldback negative temperature coefficient (NTC) thermal protection to prevent overheating.

In summary, the Ohmite CMU2531AB is a high-performance, versatile and compact current limiter suitable for a wide array of high frequency applications. Its nominal current rating of 2.5A, maximum current rating of 5A, voltage rating of 600Vrms, and a wide input voltage range of 100VAC to 277VAC, make it an excellent choice for SMPS, Class D Audio amplifiers, and other high current limiting applications. Its small size, RoHS compliance, lead-free design, and foldback NTC thermal protection further enhance its appeal for designers seeking a reliable component with high efficiency, compact size, and precise current limiting capabilities.

The Ohmite CMU2531- is a four-terminal, manual resetting, constant voltage, current limiting load, used primarily in precision current source applications. Here are the pros and cons of buying a Ohmite CMU2531- b:

1. Precision Constant Voltage: The CMU2531- b provides precise constant voltage regulation even under varying load conditions. -- letting it be suitable for high accuracy measurements and applications requiring stable voltage sources.

2. Wide operating voltage range: It can operate between 3.5V and 18V, making it versatile for a diverse range of applications.

3. High Accuracy: With a maximum error of /- 0.5% at 25 C for the 5A version, the CMU2531- b provides high accuracy and precision voltage regulation.

4. Manual Resetting: The load features a manual resetting function, which makes it easier to investigate issues and isolate faults without being affected by power recycling.

5. Multiple Sizes and Current Ratings: The Ohmite CMU2531 series comes in various sizes and current ratings, allowing users to select the right load for their specific application requirements.

1. Non-bidirectional: The Ohmite CMU2531- b is a constant voltage source that does not support bidirectional operation, meaning it can only sink current and not source current.

2. Relatively high resistance: Depending on the specific application, the 5-Ohm shunt resistance might be too high for some low voltage, high power applications.

3. Limited power handling: With a maximum power handling of 13.5 watts for the 5A model, the load might not be suitable for high-power applications.

4. Additional Heatsinking: For larger current loads, external heatsinking may be required to maintain stable operation and prevent the load from overheating.

5. Precision adjustment not provided: The Ohmite CMU2531- b is not a precision regulator and does not provide precise adjustability, although it comes with an adjustable potentiometer for setting the reference voltage.

In conclusion, the Ohmite CMU2531- is a reliable and versatile load for applications requiring constant voltage and high precision, while its manual resetting feature adds convenience for fault diagnosis. However, it may not be suitable for bidirectional applications, and users might need external heatsinking for higher power loads. Considering the pros and cons, the Ohmite CMU2531- is a valuable option for constant voltage, high precision applications with a moderate power requirement. If the above mentioned limitations do not pose significant problems for your intended application, the CMU2531- is a solid choice. Ultimately, it's essential to carefully evaluate the specifications and requirements of your application to determine whether the Ohmite CMU2531- is the best fit.

Details:

specifications passivecompos:

• brand: Ohmite
• mpn: Cmu2531

seller passivecompos:

• city: ogden, utah
• # reviews: 4320
• rating: 100.0%

offer passivecompos:

• in stock #: 5
• sold #: 22
• started: february 7, 2025
• options: ship-to-home
• prices: $3.99–$20.00
• item condition:
  • New
  • Used
  • New – Open box
  • Unspecified
• availability: in stock

general passivecompos:

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

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

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• service: standard
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