MOSFET Regulator Rectifier for KTM XCF-W, EXC-F & XCW 250 350 450 500 2012-2017
MOSFET Regulator Rectifier for KTM XCF-W, EXC-F & XCW 250 350 450 500 2012-2017
SKU:RMS020-104015
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MOSFET Voltage Regulator Rectifier for KTM XCF-W, EXC-F and XCW
KTM XCF-W, EXC-F and XCW 250, 350, 450 and 500, 2012-2017 - replaces OEM 78111034000 - part number RMS020-104015
This is a MOSFET-type voltage regulator rectifier, and the distinction matters. A conventional regulator uses diodes in a shunt arrangement, which means surplus charging energy is dumped as heat - and heat is what eventually destroys them. A MOSFET unit switches that energy far more efficiently, so it runs significantly cooler than the OEM diode-style regulator it replaces. It also carries overheat protection: rather than burning out permanently if it is pushed too hard, it shuts down temporarily and recovers, which on a KTM enduro machine can be the difference between an inconvenience and a long walk home.
Beyond running cooler, a MOSFET regulator delivers steadier power to the electrical system, which helps reduce fuel consumption, extends battery life and supports the engine's power output by keeping ignition voltage consistent. This unit is supplied as a direct replacement for KTM OEM part 78111034000, with plug-and-play installation. The body measures 115 mm long by 74 mm wide by 29 mm high, with seven wires in two lengths - 270 mm and 465 mm - and mounting holes 6.80 mm centre to centre, so it goes into the standard position and connects to the existing loom without modification.
Key Features
- MOSFET design - runs considerably cooler than an OEM diode-style regulator
- Overheat protection shuts the unit down temporarily instead of letting it burn out
- Direct replacement for KTM OEM part 78111034000
- Plug-and-play installation, no modification required
- Steadier power delivery to the whole electrical system
- Helps extend battery life and reduce fuel consumption
- Supports engine power output through consistent ignition voltage
- Seven wires in 270 mm and 465 mm lengths
- Regulated charging voltage of 14.5 V +/- 0.5 V
- Rated for up to 50 A / 500 W maximum charging current
- Rated for use from -20 C to 85 C
Technical Specs
| Specification | Detail |
|---|---|
| Part Number | RMS020-104015 |
| Type | MOSFET |
| Width | 74 mm |
| Length | 115 mm |
| Height | 29 mm |
| Wire Lengths | 270 mm and 465 mm |
| Fixation Holes (centre to centre) | 6.80 mm |
| Number of Plugs | 7 |
| Number of Pins | 2 |
| Number of Wires | 7 |
| 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 Range | -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 |
|---|---|
| KTM XCF-W 250, 350, 450 and 500 | 2012-2017 |
| KTM EXC-F 250, 350, 450 and 500 | 2012-2017 |
| KTM XCW 250, 350, 450 and 500 | 2012-2017 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 78111034000 | KTM |
Frequently Asked Questions
Will it fit my KTM without modification?
Yes. It is supplied as a direct replacement for OEM part 78111034000 with plug-and-play installation. The unit measures 115 mm by 74 mm by 29 mm with mounting holes 6.80 mm centre to centre and seven wires in 270 mm and 465 mm lengths, matching the standard installation. Check the number on your existing regulator before ordering.
What is included?
The RMS020-104015 MOSFET voltage regulator rectifier unit. It connects to the existing wiring on the bike, so no adapter loom or additional hardware is required to fit it.
How do I tell whether my old regulator has failed?
Measure DC voltage across the battery with the engine running. Around 14.5 V, give or take half a volt, is healthy. Significantly below that and the battery is not being charged, so it will go flat and the bike will eventually not start. Above 15 V and the unit is overcharging, which cooks the battery and can take bulbs and electronics with it. A regulator that is uncomfortably hot to touch, or a battery that needs charging after every ride, are both familiar warning signs.
What is the real advantage of MOSFET over the standard unit?
Temperature and survivability. An OEM diode-style regulator sheds excess charging energy as heat, and that heat is what kills it - usually at the worst possible moment. A MOSFET unit handles the same job far more efficiently, so it runs cooler, and its overheat protection shuts it down temporarily instead of letting it burn out for good. The side benefit is a steadier supply voltage, which is easier on the battery and keeps ignition performance consistent.
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