Through Hole Resistors

H820K5DZA Application Field and Working Principle

Through hole resistors are passive two terminal components with a sizing of H820K5DZA, and feature either a cylindrical body or a flat body. They provide electrical energy with a resistance proportional to the electrical power applied across the two terminals. Through hole resistors are widely used when greater resistance is needed, for example in power electronics where loads must be controlled reliably and efficiently.

The H820K5DZA through hole resistors offer excellent resistance stability even under varying temperature and operating conditions, and are often used as voltage dividers, line noise filters, signal conditioning networks, and surge suppression circuits. With a voltage rating of up to 600 volts and a resistance range of up to 8 Ohms, they are capable of dissipating a maximum of 0.125 watts and can support up to 4 amperes of current. The resistors are also designed to meet strict power ratings, yet remain physically small.

The working principle behind through hole resistors is based on Ohm\'s law, which states that the resistance of a device is equal to the ratio of the difference of potential (voltage) across the resistor to the current passing through it. This law forms the basis of the resistor’s behavior, which is to facilitate the flow of current through it by slowing it down, depending on the value of the resistance. In other words, the higher the resistance, the less current is allowed to pass through the resistor, and vice versa.

In an effort to maintain resistance stability over a range of temperatures, through hole resistors often use different materials to form the resistor’s body. These materials play an important role in the resistor’s stability, such as metal-film or metal-oxide-film for power ratings higher than 2 watts, or carbon composition and wire-wound for power ratings lower than 2 watts.

In conclusion, through hole resistors are useful in a variety of applications where high resistance needs to be accomplished near a circuit board. These resistors offer excellent stability under harsh conditions and are designed to meet strict power requirements. They work by following Ohm’s law and can be constructed using different materials for greater temperature stability, making them a great choice for a wide range of applications.