MOSFET Regulator Rectifier for Harley Davidson Dyna Glide RM30Y20
MOSFET Regulator Rectifier for Harley Davidson Dyna Glide RM30Y20
SKU:RM30Y20
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Mosfet Regulator Rectifier RM30Y20 for Harley Davidson
Dyna Glide and Super Glide 1340 1999-2003 - Heritage Softail 1450 2000
Brand new Mosfet voltage rectifier regulator, supplied as a direct replacement for the original unit fitted to the Harley Davidson Dyna Glide and Super Glide 1340 from 1999 to 2003 and the Heritage Softail 1450 in 2000. It is a plug-and-play, direct fit part - no assembly is required and no modification to the standard wiring loom is needed. The unit uses an improved heat sink and a higher grade of electrical components than the original.
Mosfet technology is what separates this unit from a standard diode-style regulator. It runs cooler than all OEM diode style regulators and it has overheat protection, so rather than burning up it will simply turn off. Because a Mosfet unit places less load on the stator, the manufacturer also lists lower fuel consumption, better regulated energy, extended battery life, more available engine power and optimised power delivery among its benefits. This is a high output unit rated at a maximum charging current of 50 A / 500 W, with a minimum charging voltage of 14.5 V +/- 0.5 V and open circuit voltage held below 15 V.
Key Features
- Mosfet design - runs cooler than all OEM diode style regulators
- Overheat protection - it turns off rather than burning up
- Direct replacement for the original unit
- Plug-and-play, direct fit, easy installation
- Improved heat sink
- Higher grade of electric components
- Less load on the stator, so less fuel used
- Regulated energy and extended battery life
- High output - 50 A / 500 W
Technical Specs
| Specification | Detail |
|---|---|
| Part number | RM30Y20 |
| Type | Mosfet regulator rectifier |
| Width | 70 mm |
| Length | 100 mm |
| Height | 35 mm |
| Wires length | 1225 mm and 505 mm |
| Fixation holes, centre to centre | 80 mm |
| Number of plugs | 3 |
| Number of pins | 4 |
| Minimum charging voltage | 14.5 V +/- 0.5 V |
| Maximum charging current | 50 A / 500 W |
| Open circuit voltage | Less than 15 V |
| Operating temperature | -20 °C to 85 °C |
Vehicle Fitment Guide
| Make & Model | Years |
|---|---|
| Harley Davidson Dyna Glide 1340 | 1999-2003 |
| Harley Davidson Super Glide 1340 | 1999-2003 |
| Harley Davidson Heritage Softail 1450 | 2000 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 74518-99A | Harley Davidson |
| 74518-99 | Harley Davidson |
| 74512-00 | Harley Davidson |
Frequently Asked Questions
Do I need to modify the wiring to fit this unit?
No. This is a plug-and-play, direct fit replacement for the original unit and no assembly is required. It uses three plugs and 4 pins, with leads of 1225 mm and 505 mm to reach the original connection points.
What is supplied?
One brand new Mosfet voltage rectifier regulator, part number RM30Y20. No additional connectors or fitting hardware are listed with this part.
How do I tell whether my old regulator rectifier has failed?
Measure the voltage across the battery terminals with the engine running and warm. A healthy charging system should show around 14.5 V. A reading that stays at resting battery voltage suggests the unit is no longer charging, while a reading above 15 V suggests it is no longer regulating and is overcharging the battery.
What is the advantage of a Mosfet unit over the original?
A Mosfet regulator runs cooler than all OEM diode style regulators and has overheat protection - instead of burning up it simply turns off. It also places less load on the stator, which the manufacturer links to lower fuel consumption, better regulated energy, longer battery life and more available engine power.
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