A fusible resistor is a type of resistor that is designed to fail or “blow out” when a predetermined amount of current is passed through it. This can be useful in a number of different applications, such as protecting sensitive electronic components from damage due to excessive currents.
Fusible resistors are typically made from a material with a high melting point, such as ceramic or glass. When the current passing through the resistor reaches the level at which the material starts to melt, the connection between the two ends of the resistor is broken and the current flow is interrupted.
Fusible resistors are used in a variety of different settings, including:
– Circuit breakers: A circuit breaker is an electrical switch that is designed to automatically break the connection in a circuit when too much current is flowing through it. This protects the electrical wiring from damage due to overheating. Fusible resistors are often used in circuit breakers to provide an additional level of protection.
– Power supplies: Power supplies are devices that convert one form of energy into another, typically electricity. Fusible resistors are often used in power supplies as a safety feature to prevent damage if the output current becomes excessive.
– Electronic components: Many sensitive electronic components, such as semiconductors, can be damaged by exposure to too much current. Fusible resistors can be used in series with these components to protect them from damage.
Fusible resistors are available in a variety of different sizes and ratings, so it is important to choose the right one for the application. The size of the resistor will determine the amount of current that can flow through it before it blows out. The rating will determine how much voltage can be applied to the resistor without causing it to fail.
Fusible resistors are typically used in applications where safety is a concern, such as in circuit breakers and power supplies. They can also be used to protect electronic components from damage due to excessive currents. When choosing a fusible resistor, it is important to consider the size, rating, and material to ensure that it is suitable for the application.