A275L-12-SF12-IE-49K6 - Arco Marine Zeus A275L 1"-2" Single Foot Alternator w/Regulator

Zeus A275L 1"-2" Single Foot Alternator with Regulator

The highest power output alternator in its size/class. 

Features:

• Engineered for High Energy Production.
• Suitable for Marine, RV, Military, and Commercial applications.
• Rapidly charges large battery banks.
• Coolest operating temperatures for increased performance. 
• Runs 8 - 20% cooler than incumbent alternators due to Heat shedding coatings, Rectifier located on housing exterior, Dual cooling fans, and OEM Components.
• It is optimized for performance at idle speeds.
• Reduces the need for a generator by creating additional power with your engine.
• Unleash peak performance with E-Coat/Cerakote. Our advanced coating absorbs less heat, keeping the A275L cooler. This translates to more amperage for sustained periods.
• Use an ARCO Zeus Bluetooth alternator regulator or lithium battery charging for maximum performance.
• SAE J1171 Certified.
• Made in the U.S.A.

Technical Specifications:

• Voltage - 12v
• Field Type - P
• Rotor Poles - 16
• Stator Size - 138mm
• Frame Size - Large
• Weight - 14.9 lbs/6.7 kg
• Regulation - Internal/External (Internally regulated with adaptor for optional external regulation.) 
• Output Voltage - 14.1v (Default)
• Finish - (Black) Cerakote or E-coating
• Cut-In RPM - 1,061 Alternator RPM
• Maximum Alt RPM - 19,000
• Battery Post - M8 Thread Post, Side Mount
• Standard Pulley - 49K6 (6-groove, 49mm)
• Pulley Mount - 17mm diameter shaft, 25mm long, threaded M17 x 1.5
• Pulley Hardware - M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)
• Diodes - 6 positive, 6 negative, 50A Rated, Avalanche
• Max Output (Cold, 9,000 RPM) - 311 Amps
• Sustained Cruising Output (Hot, 6,000 RPM) - 227 Amps
• Sustained Idle Output (Hot, 3,000 RPM) - 198 Amps
• Max Continuous Operating Temperature - 110°C / 230°F

Mounting Application:

• Replaces most domestic styles using a single 1” or 2” mounting foot (e.g., Motorola, Prestolite)

The ARCO Marine Zeus A275L is a high-output alternator with an integrated regulator, designed for demanding power generation needs in various applications. This unit is suitable for Marine, RV, Military, and Commercial use, where rapid charging of large battery banks is a requirement. It addresses the challenge of maintaining sufficient power without constant reliance on auxiliary generators, particularly at idle speeds. The A275L operates 8-20% cooler than comparable models due to its heat-shedding technologies and E-Coat/Cerakote finish, which also contributes to improved amperage output. Its design focuses on efficient energy production and performance optimization. The part number A275L-12-SF12-IE-49K6 identifies this specific configuration, which is also compatible with the ARCO Zeus Bluetooth alternator regulator for enhanced control. Manufactured in the U.S.A. and SAE J1171 Certified, it meets established quality standards.