Overview
The Onan 332-2075 voltage regulator board is a critical electrical component used in Onan marine generator sets and RV power plants. As part of the VR21 regulator family, this board monitors and adjusts generator output voltage in real time, ensuring stable 120/240V power delivery regardless of load fluctuations. The 332-2075 is commonly found in Onan 15 kW and larger marine generator systems.
Key Features
- VR21 series precision voltage regulation—maintains output voltage stability under dynamic loads
- Marine-rated construction designed for RV, yacht, and offshore generator applications
- Frequency-sensitive regulation option for load balancing and engine efficiency
- Compact circuit board assembly with integrated control logic
- Direct replacement for discontinued Onan original equipment
Technical Specifications
- Part Number: Onan 332-2075
- Regulator Type: VR21 voltage regulator board assembly
- Application: Marine and RV generator sets (15 kW and larger)
- Output Voltage Range: 120/240V single-phase (standard configuration)
- Frequency: 60 Hz (North American standard)
- Component Type: Printed circuit board assembly with solid-state regulation
- Mounting: Control box–mounted assembly
- Status: Discontinued by Onan; aftermarket replacement available
Typical Applications
- Marine Generators: Yacht and boat electrical systems requiring stable shore-power-quality AC output
- RV Power Plants: Class A, B, and C motorhome generator sets
- Backup Power Systems: Marine and mobile applications requiring auxiliary power generation
- Industrial Marine: Commercial fishing vessels and workboats
Compatibility & Replacements
Compatible With
- Onan marine generator models with 15.0MDJF3CP and similar configurations
- Onan RV generator sets using VR21 control architecture
- Generator sets configured for 120/240V single-phase 60 Hz output
- Frequency-sensitive or non-frequency-sensitive reference modes (field-configurable)
Replaces / Drop-In Replacement For
- Original Onan 332-2075 (discontinued)
- Verify cross-compatibility with system integrator before ordering—some VR21 boards (332-1956, 332-2045, 332-1268) may share mounting but require electrical verification
Works With
- Onan UR series generator control systems
- Standard 120/240V single-phase electrical networks
- Engine prime movers (diesel, gasoline, or natural gas) with AC alternator output
- Manual or automatic load transfer switches
- Battery charging and field-flash circuits (12 VDC auxiliary power)
