Arco Starting & Charging A275L-12-TR-IE-49K6 Zeus A275L Transit Alternator 275A 12V

The Arco Zeus A275L Transit Alternator delivers the highest power output in its size class, engineered specifically for demanding marine, RV, military, and commercial applications. This premium 12-volt alternator features advanced thermal management technology that keeps operating temperatures 8-20% cooler than conventional alternators, enabling sustained high-amperage output even under extreme conditions.

Advanced Cooling Technology:

• Proprietary heat-shedding Cerakote or E-coat finish absorbs less heat for maximum performance
• Externally mounted rectifier improves heat dissipation
• Dual cooling fans maintain optimal operating temperatures
• Maximum continuous operating temperature of 230°F (110°C)

High-Output Performance:

• 311 amps maximum output at 9,000 RPM (cold)
• 227 amps sustained cruising output at 6,000 RPM (hot)
• 198 amps sustained idle output at 3,000 RPM (hot)
• Optimized for performance at idle speeds with 1,061 RPM cut-in
• Rapidly charges large battery banks, reducing the need for a generator

Technical Specifications:

• Voltage: 12V with 14.1V default output
• Regulation: Internal/External with adaptor for optional external regulation
• Stator: 138mm, 16-pole rotor design
• Diodes: Six positive, six negative, 50A rated avalanche type
• Pulley: 49K6 (6-groove, 49mm) on 17mm diameter shaft
• Battery Post: M8 threaded post, side mount
• Maximum alternator RPM: 19,000
• Weight: 14.9 lbs

Application & Compatibility:

• Direct replacement for Ford Transit 3.5L and 3.7L gas engines (2015-2022)
• Compatible with ARCO Zeus Bluetooth alternator regulator for maximum performance
• Suitable for lithium battery charging applications
• SAE J1171 Certified
• Made in the USA with OEM components

This alternator includes pulley hardware: M17 x 1.5 x 24mm nut with 18mm ID x 29mm OD washer. The internal/external regulation capability allows for flexible installation with optional external voltage regulators for advanced battery management systems.