AT-Series 200 Amp Alternator Designed for Recreational Applications 200A in a Small Case Package Single Foot 1” / 2” Mount J10 Serpentine Pulley Up to 147A at Idle Speeds Smart Ready Technology 25% More Efficient Dual Fan Cooling High Airflow Frame Maximum RPM: 10,000 Ideal for Large Battery BanksAT (Advanced Technology”) Series Alternators from Balmar bring together the latest innovations in alternator design to deliver incredible charging power in a compact, Marine-friendly package. AT-Series Alternators feature a unique hairpin-wound stator design which uses densely wound square copper wire to generate exceptional output in the smallest possible area. Hairpin-wound stators feature 96 slots – compared to 36 slots in a traditional S-wound stator – allowing the hairpin-wound stator to develop superior electromagnetic energy and efficiency superior to other traditional stator designs. AT-Series Alternators also feature a dozen 50A capacity, externally mounted avalanche diodes, dual internal fans, and massive heat-sinking designed to ensure essential cooling under high load demands. Scaled to fit in most original position installations, AT-Series Alternators are available in all four common mounting styles.