Arco Starting & Charging 4026 Zeus A275L High Output Marine Alternator with Clutch Pulley

The Arco Zeus A275L N62 is a high-performance 12-volt marine alternator engineered to deliver the highest power output in its size class. Designed for demanding marine, RV, military, and commercial applications, this alternator rapidly charges large battery banks while operating at significantly cooler temperatures than conventional units.

Advanced Cooling Technology:

• Runs 8-20% cooler than standard alternators through heat-shedding Cerakote or E-coat finish
• Exterior-mounted rectifier for improved heat dissipation
• Dual cooling fans for maximum airflow
• Maximum continuous operating temperature of 230°F (110°C)

Exceptional Power Output:

• 311 amps maximum output (cold, 9,000 RPM)
• 227 amps sustained cruising output (hot, 6,000 RPM)
• 198 amps sustained idle output (hot, 3,000 RPM)
• Optimized for performance at idle speeds
• Reduces or eliminates the need for a separate generator

Technical Specifications:

• Voltage: 12V (14.1V output default)
• Field Type: P-Type with external regulation only
• 138mm stator size with 16 rotor poles
• Cut-in speed: 1,061 alternator RPM
• Maximum alternator RPM: 19,000
• Weight: 14.9 lbs (6.7 kg)
• Avalanche diodes: 6 positive, 6 negative, 50A rated

Mounting and Connections:

• Standard 49K6 clutch pulley (6-groove, 49mm diameter)
• 17mm diameter shaft, 25mm long, threaded M17 x 1.5
• M8 thread battery post, side mount configuration
• Includes terminal block and P-Type harness
• Requires external regulator (ARCO Zeus Bluetooth regulator recommended)

Applications:

• Mercedes Sprinter 1999-2006 alternator replacement
• Mercedes Sprinter factory dual alternator 2007-Up replacement
• Roadtrek Mercedes dual alternator replacement

SAE J1171 certified and proudly made in the USA, the Zeus A275L features premium OEM components and is compatible with lithium battery charging systems when paired with appropriate external regulation.