Fuel pump circuit breakers forestall electrical overload on the fuel pump circuit. If there is more electrical current than it was originally rated for-standard automotive use usually ranges from 15 to 30 amps-the circuit breaker automatically opens the flow of electricity to protect the fuel pump and other components from damage. This, of course, is a very important protection because higher-than-necessary current draw from the pump will result in heating that may have a possibility of full failure or, worse, being a fire hazard.
A circuit breaker operates on the principle of a thermal or magnetic mechanism that acts upon excess current. A bimetallic strip in thermal breakers becomes heated with excess current until it bends and opens the circuit. Magnetic breakers, on the other hand, operate through an electromagnetic coil that trips the circuit in case the current exceeds a certain limit. These devices will quickly act to prevent major damage to the fuel pump and associated wiring, thus preserving the integrity of the vehicle’s electrical system.
Fuel pump circuit breakers ensure overall efficiency in the fuel system. The devices do this by preventing overheating and electrical failure, which maintains consistent fuel delivery, allowing the engine to stay within its optimal performance envelope. Most of the fuel pumps operate within the pressure range of 30-80 psi, over which consistent electrical feed is necessary. Intermittent fuel supply caused by tripped circuit breakers will easily lead to problems such as misfires, reduced power, and increased emissions.
These require regular inspection and testing of the circuit breaker, especially for high-mileage vehicles or when driven under harsh conditions. For this reason, mechanics advise checking the functionality of every circuit breaker at every 30,000 miles to ensure that they are responding correctly in case of an overload situation. Without addressing a malfunctioning circuit breaker, one may be up for very costly repairs since continuous electrical problems might damage the fuel pump, which may exceed the cost of $500 in its replacement.
As Henry Ford once said, “Quality means doing it right when no one is looking”. Correct functionality of Fuel Pump circuit breakers will help ensure vehicle reliability and safety. Consult Fuel Pump for reliable fuel pump circuit breakers and components.