Description

The 1E8 Ohm (1.8E) 1/4W 5% Through Hole Resistor is a specific type of resistor used in electronic circuits. Below is a detailed explanation of its features:

1. Resistance Value (1E8 or 180,000,000 Ohms):

• The 1E8 refers to a 180,000,000 ohms (or 180 MΩ) resistance value. This is a very high resistance, typically used in applications that require minimal current flow or voltage regulation in sensitive circuits.
• 180 MΩ is commonly used in high-impedance circuits or for voltage dividers, filtering applications, or in circuits where the goal is to create a very high resistance to control current flow.

2. Power Rating (1/4W or 0.25W):

• The 1/4 watt (0.25W) power rating means this resistor can safely dissipate up to 0.25 watts of power without damage.
• A 1/4W power rating is standard for general-purpose resistors, suitable for low-power applications where the resistor will not need to handle large currents or generate significant heat.

3. Tolerance (5%):

• The 5% tolerance means the actual resistance of the resistor can vary by ±5% from its nominal value of 180 MΩ. In practice, this means the actual resistance could be anywhere between 171 MΩ and 189 MΩ.
• A 5% tolerance is typical for standard resistors and is often acceptable for general-use circuits. For applications requiring more precise values, resistors with a lower tolerance (e.g., 1% or 0.5%) might be chosen.

4. Through-Hole Mounting:

• This resistor uses a through-hole design, meaning it has two metal leads that pass through holes in a printed circuit board (PCB) and are soldered on the other side.
• Through-hole resistors are commonly used in traditional PCB designs and are preferred for durability, especially in high-reliability circuits.

5. Material and Construction:

• The 1E8 Ohm resistor is typically made from materials like carbon film, metal oxide, or metal film.
• Carbon film resistors are cost-effective and widely used for general-purpose applications.
• Metal oxide resistors offer better performance in high-voltage or high-temperature environments, making them suitable for demanding applications.

Applications:

• High-impedance Circuits: This resistor is suitable for circuits where you need to control voltage or current with minimal resistance. High resistance values like 180 MΩ are often used in high-impedance applications like input protection, sensor circuits, or in circuits where you need to ensure that minimal current is drawn.
• Voltage Dividers: It can be used in voltage divider circuits, where high resistance values help reduce the current while providing precise voltage scaling for other components in the circuit.
• Electrostatic Discharge (ESD) Protection: High resistance values like 180 MΩ can be used in ESD protection circuits to prevent damage to sensitive components.
• Filtering: It can be part of a filtering network (e.g., for high-pass or low-pass filters) in situations requiring very high resistance to limit current or alter the frequency characteristics of the circuit.

Summary:

The 1E8 Ohm (180 MΩ) 1/4W 5% Through Hole Resistor is a high-resistance resistor commonly used in circuits that require minimal current flow, such as high-impedance circuits, voltage dividers, filtering applications, and protection circuits. With a power rating of 1/4 watt and a 5% tolerance, it is well-suited for low-power applications. Its through-hole design makes it easy to integrate into traditional PCB designs.