( Brand: National Semiconductor ), ( Manufacturer Part Number: LM340K-12 ), ( Part Type: Voltage Regulator )
The LM340K-12 National 1.5A Regulator is a set of four high-quality voltage regulators, each designed to deliver a stable 12V output voltage with a maximum current capacity of 1.5 amps. This regulator is a popular choice due to its reliability and versatility, making it suitable for a wide range of applications, including power supplies, instrumentation, and electronic circuitry.
The LM340K-12 is a 3-terminal, positive voltage regulator that operates on input voltages ranging from 10V to 30V. It features a low dropout voltage of approximately 2.5V at no load, which means it can maintain a regulated output even when the input voltage drops below the desired output voltage. The regulator is also equipped with thermal protection, ensuring safe operation even under high-temperature conditions.
This regulator is packaged in a compact, hermetically sealed TO-220 package, which is able to withstand harsh environments and operate over a wide temperature range of -55 C to 125 C. The 4-pin configuration makes it easy to integrate into circuits, with the first pin serving as the input voltage, the second pin as the output, the third pin as the ground, and the fourth pin as the thermal feedback pin.
In summary, the LM340K-12 National 1.5A Regulator is a robust and reliable voltage regulator that provides a stable 12V output with a maximum current capacity of 1.5 amps. Its wide input voltage range, low dropout voltage, and thermal protection make it an ideal choice for a variety of applications, while its compact and rugged packaging ensures long-term performance and reliability.
Pros of buying LM340K-12 National 1.5A Regulator (4pc):1. Stable Output Voltage: The LM340K-12 is a linear voltage regulator that provides a stable output voltage of 12V, regardless of the input voltage fluctuations.
2. Wide Input Voltage Range: This regulator can operate with an input voltage range of 10V to 36V, making it suitable for various power sources.
3. High Accuracy: The LM340K-12 offers a voltage regulation accuracy of 1% at room temperature, ensuring a consistent output voltage.
4. High Current Handling Capacity: With a maximum output current of 1.5A, the LM340K-12 can handle moderate power loads.
Cons of buying LM340K-12 National 1.5A Regulator (4pc):1. Inefficiency: Linear regulators like the LM340K-12 are less efficient compared to switching regulators. They waste energy in the form of heat, which can lead to overheating if not properly cooled.
2. Large Size and Weight: Due to their linear design, linear regulators like the LM340K-12 are larger and heavier than switching regulators.
3. Limited Load Regulation: While the LM340K-12 provides stable output voltage, its load regulation is not as good as switching regulators. It may not be suitable for applications with rapidly changing load requirements.
Conclusion:The LM340K-12 National 1.5A Regulator (4pc) is a reliable choice for applications that require a stable 12V output voltage, even with input voltage fluctuations. Its wide input voltage range and high accuracy make it suitable for various power sources. However, its inefficiency, large size, and limited load regulation should be considered before making a purchase.
Recommendation:If you need a regulator for an application with a moderate power load and require a stable output voltage, the LM340K-12 National 1.5A Regulator (4pc) is a good choice. However, if efficiency, size, or load regulation are critical factors, you may want to consider switching regulators as an alternative.
Lm340k 12 12v voltage regulator more in stock.