With Expertise Built In™, the OTR Model 555 12V 160A Pad Mount Alternator is the superior performing solution that meets the demands of the road and also improves fuel economy. The design of this OTR replacement alternator incorporates a number of safety features that minimizes damage, and also offers higher power output with less engine horsepower draw for your truck. Splines and bearing surfaces are heat-treated, wire and varnish rated 356 °F. In addition, gain assurance with this OTR pad mount alternator being equipped with over-voltage shutdown and open-sense shutdown protection. The over-voltage shutdown feature limits voltage if the output terminal becomes disconnected from the battery, while the open-sense shutdown feature stops the alternator if the sensed terminal opens. This heavy duty alternator is wound on OE equipment, with consistency that is 100% tested, and boasts heavy-coat polyester wire just like OE, which means reliability, consistency, and performance you can count on. OTR heavy duty parts offer the same form, fit, and function as OE. With comprehensive research, independent testing, and continuous product development, OTR heavy duty parts are sure to keep you and your truck safely on the road. In addition to providing the highest quality of heavy duty truck and trailer parts, you can rely on OTR warranties to be comparable or better than OE and top brands. FleetPride is your First Click in Heavy Duty®.