Protection Function: The rectifier has a battery charging protection function. When the battery is fully charged, the rectifier stops charging to prevent overcharging. Stable Voltage: Output voltage remains stable at DC 14.5V ± 0.5V, helping protect vehicle electronic equipment and extend service life. High Quality: Aluminum housing and heat-dissipating silicone provide even heat dissipation for electronic components, increasing the rectifier's lifespan. Fitment Information: This voltage regulator rectifier fits 8-25 HP engines with 15 Amp alternators. Features 3 terminals in a row: AC, B+, AC. Output voltage: 14.5V ± 0.5V. Replacement Part Numbers: 4140309, 2575503S, 4140305, 2540303, 2540303-S, 2575503, 2575503-S, 4140301, 4140303, 4140304, 4140303-S, 4140305, 4140306, 4140306-S, 4140308, 4140308-S, 4140309, 4140309-S, 4140310, 4140310-S.