Description

The 4E7 Ohm (4.7E) 1/2W 5% Through Hole Resistor is a commonly used resistor in a variety of electronic circuits, designed to limit or control the flow of electrical current. With a resistance value of 4.7 ohms, a power rating of 1/2 watt (0.5W), and a 5% tolerance, this resistor is well-suited for use in general-purpose applications, such as voltage regulation, current limiting, and power management. Its through-hole mounting makes it easy to incorporate into printed circuit boards (PCBs) for both prototyping and final product assemblies.

Key Specifications:

• Resistance: 4.7 ohms (or 4.7E)

  • The 4.7 ohms resistance value is commonly used in power control and current limiting applications where moderate resistance is required to balance the circuit's current flow. It is useful for reducing voltage or controlling the flow of current in a variety of devices.

• Power Rating: 1/2 watt (0.5W)

  • This resistor has a 1/2 watt power rating, allowing it to safely dissipate up to 0.5 watts of electrical power without overheating. It is ideal for circuits that operate at lower to moderate power levels.

• Tolerance: ±5%

  • The resistor has a 5% tolerance, meaning the actual resistance value may vary by up to 5% from the nominal resistance. Therefore, the actual resistance could range from 4.465 ohms to 4.935 ohms.

• Mounting Type: Through-hole

  • The through-hole mounting design allows the resistor's metal leads to pass through holes in the PCB, where they are soldered to provide a stable electrical and mechanical connection. This type of mounting is common in both prototyping and final production electronic assemblies.

Applications:

• Current Limiting:
  The 4.7 ohm resistor is used in current-limiting applications where it helps protect sensitive components from excessive current flow, which could damage the circuit.

• Voltage Regulation:
  It is frequently used in voltage regulation circuits to ensure that the voltage stays within a certain range, helping stabilize power delivery to other components.

• Power Management:
  This resistor is also useful in power management circuits, where it helps distribute or manage the flow of electrical power across various components, ensuring that each part of the circuit receives the correct voltage and current.

• General-Purpose Circuits:
  With its 1/2 watt power rating and 5% tolerance, this resistor is ideal for a broad range of general-purpose applications, including signal processing, noise filtering, and amplification circuits.

Physical Characteristics:

• Size:
  The 1/2 watt resistor typically measures about 1/4 inch (6.35 mm) in length and 1/8 inch (3.18 mm) in diameter, though exact dimensions may vary depending on the manufacturer.

• Construction:
  The resistor has a cylindrical body with metal leads extending from both ends. These leads are designed to pass through PCB holes, where they are soldered for a secure, durable connection, making it ideal for both prototyping and mass production.

Summary:
The 4E7 Ohm (4.7E) 1/2W 5% Through Hole Resistor is an essential component for a wide range of electronic applications. It offers a 4.7 ohm resistance, 1/2 watt power rating, and 5% tolerance, making it suitable for current limiting, voltage regulation, and power management applications. Its through-hole design ensures reliable mounting and connection in electronic assemblies, and it is well-suited for both low and moderate power circuits. Whether used in general-purpose circuits, signal processing, or noise filtering, this resistor is a versatile and reliable component.