The Honda 31700-166-008 Silicon Rectifier is a genuine OEM component designed for EM6000, EX3300, EX4500, and EXW171 generators. As a direct OEM replacement, this rectifier is built to Honda's own specifications, ensuring proper electrical output and consistent charging performance across the full range of covered units. Verify your generator's serial number against the fitment table before ordering, as Honda updates components at specific serial breaks. This rectifier is the correct choice for restoring proper DC output to your generator's charging circuit.
Key Features
- Genuine OEM Electrical Specification — sourced directly from Honda, this rectifier meets the exact voltage and current ratings the EM6000, EX3300, EX4500, and EXW171 generators were designed around, preserving stable charging output.
- Drop-In Replacement — engineered to match the original unit's form and connector configuration, allowing installation without improvisation or adaptation to wiring harnesses.
- Wide Generator Coverage — fits EM6000, EX3300, and EX4500 generators as well as the EXW171 welder generator; always cross-reference your serial number with the fitment table to confirm the correct variant for your unit.
- Restored Charging Function — a failed rectifier causes erratic or absent DC output, resulting in battery drain and loss of charging capability; replacing it with part number 31700-166-008 restores the generator's ability to charge connected batteries and power DC loads.
The silicon rectifier converts the alternating current produced by the generator's alternator into the direct current needed to charge batteries and supply DC electrical loads. Inside a conventional generator, the alternator produces AC power; the rectifier uses silicon diodes to allow current to flow in only one direction, producing a usable DC output. When the rectifier fails — whether through heat stress, overload, or age — the generator loses its DC charging capability entirely, which is why replacing a faulty unit promptly with a correct OEM part matters for restoring full generator function.
Part Details
| Part Number | 31700-166-008 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Silicon Rectifier |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EM6000, EX3300, EX4500 | All |
| Welder Generator | EXW171 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
