NATIONAL SEMICONDUCTOR LM340KC-12 Voltage Regulator 7812CK

( Brand: National Semiconductor ), ( Manufacturer Part Number: LM340KC-12 ), ( Nominal Voltage Rating: Dc ), ( Mounting Style: Through-hole ), ( Type: Transistor Voltage Regulator ), ( Current Conversion: Dc To Dc ), ( Color: Silver )

Review NATIONAL SEMICONDUCTOR Voltage Regulator 12v Silver

The National Semiconductor LM340KC-12 Voltage Regulator, also known as the LM7812CK, is a fixed-voltage linear regulator that provides a stable 12 Volt output. This regulator is designed for use in various electronic circuits and systems where a constant 12 Volt supply is required.

The LM340KC-12 is a three-terminal adjustable regulator, with the input (IN), ground (GND), and output (OUT) pins. The regulator is housed in a compact TO-220 package, which makes it easy to install in most PCB designs. The adjustable feature of the regulator is achieved by using an external voltage divider network connected to the IN and GND pins. This allows the user to set the desired output voltage within a certain range.

One of the key features of the LM340KC-12 is its high output current capability. The regulator can deliver up to 1.5 Amperes of continuous current, making it suitable for powering small to medium-sized circuits. Additionally, the regulator has a low dropout voltage of approximately 2.5 Volts, which means that it can maintain the output voltage even when the input voltage is slightly lower than the desired level.

The LM340KC-12 also offers excellent thermal stability and load regulation. The regulator's output voltage remains stable even under varying load conditions, ensuring that sensitive electronic components are not affected by voltage fluctuations. Furthermore, the regulator's thermal stability feature ensures that the output voltage remains constant even in high ambient temperatures.

The LM340KC-12 also includes several protective features, such as overcurrent protection, overvoltage protection, and thermal shutdown. These features help prevent damage to the regulator and the connected circuitry in case of overloads or abnormal operating conditions.

In summary, the National Semiconductor LM340KC-12 Voltage Regulator is a versatile and reliable solution for generating a stable 12 Volt output in electronic circuits and systems. Its high output current capability, low dropout voltage, excellent thermal stability, and protective features make it an ideal choice for various applications where a constant voltage supply is essential.

The National Semiconductor LM340KC-12 7812CK Voltage Regulator is a linear voltage regulator designed to deliver a constant 12V output from a variable input voltage source. Here are some pros and cons that can help you make an informed decision about purchasing this component.

1. Wide Input Voltage Range: The LM340KC-12 can handle input voltages ranging from 10V to 36V, making it suitable for various power supply designs.

2. High Efficiency: With a typical efficiency of around 80%, the LM340KC-12 converts a significant portion of the input power to the desired output, reducing power loss and heat generation.

3. Low Noise: This voltage regulator is known for its low noise output, making it an ideal choice for applications where noise sensitivity is a concern, such as audio circuits or precision measurements.

4. Protection Circuit: The LM340KC-12 incorporates a thermal shutdown feature that helps protect the component from overheating and potential damage.

1. Limited Current Capacity: With a maximum output current of 1.5A, this regulator may not be sufficient for high-current applications.

2. Linear Regulator: Linear regulators, in general, have lower efficiency compared to switching regulators, which can result in higher power consumption and heat generation, especially when dealing with large load currents or voltage differences.

The National Semiconductor LM340KC-12 7812CK Voltage Regulator is an excellent choice for low to moderate current applications that require a stable, low-noise 12V output. Its wide input voltage range, high efficiency, and protection circuit make it a reliable and versatile component for various power supply designs. However, its limited current capacity and lower efficiency compared to switching regulators may make it less suitable for high-current applications.

If your application requires a stable 12V output, a low-noise environment, and a moderate to low current load, the LM340KC-12 7812CK Voltage Regulator would be an excellent choice. However, if your application involves high current loads or significant voltage differences, consider using a switching regulator or a voltage regulator with a higher current capacity to achieve better efficiency and power management.

Details:

National Semiconductor LM340KC-12 7812CK voltage Regulator 12V Silver.

part #: lm340kc12 prices

• $7.50-$17.98

specifications voltageregula:

• brand: National Semiconductor
• mpn: Lm340kc-12
• nominal voltage rating: Dc
• mounting style: Through-hole
• type: Transistor Voltage Regulator
• current conversion: Dc To Dc
• color: Silver

offer voltageregula:

• quantity: 1
• availability: In Stock
• sold: 0
• started: March 10, 2026
• options: Ship-to-home

payments voltageregula:

• other
• wallet: Google-pay
• credit card: Mastercard

shipping voltageregula:

• type: Calculated
• carrier: USPS
• cost: $5.07
• transit: 4-10 Days
• class: Standard
• service: USPS Ground Advantage

general voltageregula:

• condition: Used
• Electronic Components Semiconductors > Semiconductors Actives > Power Regulators Converters

returns voltageregula:

• policy: No Returns

seller voltageregula:

• city: Grand Rapids, Michigan
• rating: 100.0%
• # reviews: 17

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