Advanced MOSFET voltage regulator for the Honda FSC 600 Silver Wing. A MOSFET regulator operates cooler than a traditional diode-style regulator and this unit carries integrated overheat protection, which is important on a maxi-scooter where the regulator sits in a confined, warm part of the bodywork. It is supplied as a direct replacement with plug-and-play installation.
The square body measures 92 mm by 92 mm with a height of 30 mm and fixation holes on 78 mm centres. Wiring is arranged as 2 plugs carrying 8 pins and 8 wires, with 240 mm stator leads and a 350 mm battery lead. The unit uses an improved heat sink design and higher-grade electrical components that exceed OEM specifications, and all units are tested before shipment.
Key Features
- MOSFET design runs cooler than diode-style regulators
- Integrated overheat protection
- Improved heat sink design
- Direct replacement with plug-and-play installation
- Higher-grade electrical components exceeding OEM specification
- Minimum charging voltage of 14.5 V +/- 0.5 V
- Rated to a maximum charging current of 50 A / 500 W
- All units tested before shipment
Technical Specs
| Specification |
Detail |
| Part number |
RMS020-103693 |
| Type |
Mosfet voltage regulator |
| Width |
92 mm |
| Length |
92 mm |
| Height |
30 mm |
| Fixation holes (centre to centre) |
78 mm |
| Stator wires length |
240 mm |
| Battery wire length |
350 mm |
| Number of plugs |
2 |
| Number of pins |
8 |
| Number of wires |
8 |
| Minimum charging voltage |
14.5 V +/- 0.5 V |
| Maximum charging current |
50 A / 500 W |
| Open circuit voltage |
< 15 V |
| Operation temperature |
-20 C to 85 C |
Vehicle Fitment Guide
Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.
| Make & Model |
Years |
| Honda FSC 600 Silver Wing |
2002-2013 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 31600-MCT-003 |
Honda |
| 31600-MEF-003 |
Honda |
| 31600-MCT-680 |
Honda |
| 31600-MCT-771 |
Honda |
Frequently Asked Questions
Does it fit without modification?
Yes. It is a direct replacement with plug-and-play installation. The 92 mm by 92 mm body mounts on 78 mm hole centres and the harness uses 2 plugs with 8 pins and 8 wires, so no cutting, drilling or rewiring is required.
What is in the box?
The Mosfet voltage regulator unit, pre-wired with 240 mm stator leads and a 350 mm battery lead, tested before shipment.
How do I tell the original regulator has failed?
Look for a battery that will not stay charged, lights that dim or surge with revs, or a battery that gets hot and gasses. With the engine running, a working system should show at least 14.5 V +/- 0.5 V at the battery. Readings that stay at resting voltage or rise above 15 V point to the regulator.
What is the advantage of a MOSFET regulator here?
A MOSFET unit runs cooler than a diode-style regulator and this one adds integrated overheat protection and an improved heat sink. On the Silver Wing the regulator lives in an enclosed area with limited airflow, so lower operating temperature directly benefits service life.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
