A225S-12-DF315-EX-49K6 - Arco Marine Zeus A225S J-180 3.15" Alternator w/Terminal Block

Zeus A225S J-180 3.15" Alternator with 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. Runs 8 - 20% cooler than incumbent alternators due to:
• 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. Our advanced coating absorbs less heat, keeping the A225S cooler. This translates to more amperage for sustained periods.
• For maximum performance or lithium battery charging, use an ARCO Zeus Bluetooth alternator regulator.
• SAE J1171 Certified.
• Proudly made in the U.S.A.

Technical Specifications:

• Voltage - 12v
• Field Type - P
• Rotor Poles - 16
• Stator Size - 130mm
• Frame Size - Small
• Weight - 12lbs/6.7kg
• Regulation - External Only
• 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) - 254 Amps
• Sustained Cruising Output (Hot, 6,000 RPM) - 187 Amps
• Sustained Idle Output (Hot, 3,000 RPM) - 157 Amps

Mounting Application:

• Replaces most small case styles using a 3.15” J180 saddle style mount (e.g., Hitachi, Lucas, Mitsubishi) Most Yanmars.

The ARCO Marine Zeus A225S is an alternator designed for high energy production in demanding environments. This unit is suitable for marine, RV, military, and commercial applications where reliable power generation is critical for large battery banks. It offers rapid battery charging capabilities and is engineered to operate cooler than traditional models, which contributes to enhanced performance and longevity. Key features include dual cooling fans for improved heat shedding and advanced E-Coat and Cerakote finishes for durability. The A225S-12-DF315-EX-49K6 model meets rigorous SAE J1171 certification standards, ensuring it adheres to industry requirements for safety and performance. This alternator reduces the need for a separate generator by providing substantial output, even at idle speeds, with a sustained idle output of 157 Amps (Hot, 3,000 RPM).