Description
Zeus A225S 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, running 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 for sustained amperage output.
- Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.
- SAE J1171 Certified.
- Models are available with an internal/external voltage regulator.
- Proudly made in the U.S.A.
Technical Specifications:
- Voltage – 12v
- Field Type – P
- Rotor Poles – 16
- Stator Size – 130mm
- Frame Size – Small
- Weight – 12 lbs/5.4 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) – 254 Amps
- Sustained Cruising Output (Hot, 6,000 RPM) – 187 Amps
- Sustained Idle Output (Hot, 3,000 RPM) – 157 Amps
- Max Continuous Operating Temperature – 110°C / 230°F
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

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