Mastervolt AlphaCompact 14/120 MB N62 mounting kit
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Technical specifications
Technical specifications
| Series | Alpha Compact |
| Nominal voltage | 12.0 |
| Nominal current | 120.0 |
| Power | 3.4 |
| Max rotation speed | 20000.0 |
| Cut-in speed | 1300 |
| Idle current | 70.0 |
| Mounting style | Specific mounting kit (Mercedes-Benz N62) |
| Rotation direction | Schedule |
| Field control type | External regulator (Alpha Pro III) |
| Cooling method | Dual internal fans |
| Cooling fan count | 2.0 |
| Max operating temperature | 120.0 |
| Weight | 4.5 |
| Marine-ready | Oui |
| Class Type | Power conversion |
| Country Of Manufacture | Germany |
| Design Feature | Patented open-frame structure |
| Environmental Protection Features | Protection against oil, moisture, and dirt |
| Idle Current Rpm | 1800 |
| Item Type | Main product |
| Nominal Current Test Temperature | 25 |
| Power Hp | 4.5 |
| Unit Of Measure | Each |
Detailed description
Detailed description
Designed for demanding onboard charging systems, the Mastervolt ALPHACOMPACT 14-120 MB N62 mounting kit is a high-performance alternator optimized for continuous power output. Specifically tailored for Mercedes-Benz N62 engines, this 12V DC alternator delivers a nominal current of 120 A at 6000 rpm (at 25°C), with a charging capacity of 70 A from 1800 rpm. Its engagement speed is 1300 rpm and it supports a maximum rotation speed of 20 000 rpm, providing a power output of 3.4 kW (4.5 hp).
Design and Performance
The ALPHACOMPACT 14-120 alternator integrates an Alpha Pro III charge regulator as standard, providing an out-of-the-box solution for efficient battery management. Its patented design, featuring an open structure and dual internal fans, makes it up to 40% lighter and 25% more compact than conventional alternators. It is designed to operate in high-temperature environments up to 120 °C, with protection for cables and electronic components against oil, moisture, and dirt. Its rotation is clockwise and it features non-insulated galvanic isolation, though insulation is possible with optional rings (not compatible with N62).
Integration and Compatibility
Weighing 6.7 kg, this alternator is equipped with a swivel arm for mounting. Connections include a positive output stud (2x M8), an isolated fast-response W (rpm) signal connection, and a Mastervolt field current connection. A temperature sensor is integrated with an RJ12 connection. The Mastervolt ALPHACOMPACT 14-120 is compatible with all battery types, including Lithium-Ion batteries, and contributes to up to 30% fuel consumption reduction. It is used in marine, mobile, infrastructure, and industrial sectors worldwide.
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