ARCO Marine Zeus A275L 3.15 Alternator with Isolated Ground and Terminal Block 4019

Zeus A275L 3.15 Alternator with Isolated Ground Terminal Block

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.


• Heat shedding coatings


• Rectifier located on housing exterior


• Dual cooling fans


• OEM components


• 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, keeping the A275L cooler for sustained amperage output.


• Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.


• SAE J1171 Certified.


• Models available with internal/external voltage regulator.


• Proudly 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 - 110C / 230F

Mounting Application:

• Replaces most small case styles using a 3.15 saddle style mount (e.g., Hitachi, Lucas, Mitsubishi). Most Yanmars. Requires Standard single V belt upgrading to a Serpentine System

The ARCO Marine Zeus A275L 3.15 Alternator is engineered to deliver the highest power output in its class, making it ideal for demanding marine, RV, military, and commercial applications. Designed for high energy production, this alternator quickly charges large battery banks while maintaining the coolest operating temperatures to ensure sustained performance. Its heat shedding coatings and exterior-mounted rectifier contribute to enhanced durability and efficiency, even under prolonged use. Dual cooling fans and advanced thermal management allow the alternator to operate reliably at high output levels without overheating, supporting continuous operation in challenging environments. The Zeus A275L utilizes OEM components and is optimized for performance at idle speeds, reducing the reliance on generators by generating additional power directly from your engine. This feature makes it an excellent choice for applications where space and weight are critical considerations.

The alternator's robust design includes a 16-pole rotor, large frame size, and a weight of just under 15 pounds for easy installation. It offers a regulated output voltage of 14.1 volts, suitable for maintaining battery health and power stability. Compatibility with both internal and external voltage regulation provides versatility, with optional external regulation for customized control settings. The alternator's construction features a black Cerakote or E-coating finish, providing corrosion resistance and long-term durability. It is equipped with a standard 6-groove pulley, a side-mount M8 threaded post, and includes mounting hardware for straightforward installation. The integrated diodes are rated for 50A, avalanche type, ensuring reliable rectification under high load conditions.

With a maximum cold RPM of 9,000, the ARCO Zeus A275L can produce up to 311 amps, and it sustains impressive output levels at hot cruising speed and idle RPMs, making it suitable for heavy-duty applications. The alternator is designed to fit most small case styles using a 3.15 saddle mount, including models from Hitachi, Lucas, Mitsubishi, and most Yanmars, with a requirement to upgrade to a serpentine belt system. Certified under SAE J1171 standards and proudly made in the USA, this alternator can be paired with the ARCO Zeus Bluetooth Alternator Regulator for optimal performance and lithium battery charging. Its high-capacity, durable construction ensures reliable operation in demanding environments, making it a versatile and powerful component for your power generation needs.

Features:

• High power output: Engineered for maximum energy production in its size class

• Versatile applications: Suitable for marine, RV, military, and commercial use

• Efficient charging: Rapidly charges large battery banks for extended operation

• Temperature management: Coolest operating temperatures for increased performance

• Heat dissipation: Heat shedding coatings and dual cooling fans

• Exterior rectifier: Located on housing exterior for easier maintenance

• OEM components: Built with high-quality OEM parts for reliability

• Performance optimization: Designed for ideal operation at idle speeds

• Power generation: Reduces reliance on generators by creating additional power with your engine

• Durable finish: Coated with Cerakote or E-coating for corrosion resistance

• Compatibility: Supports internal/external voltage regulation with optional external regulator