The Honda 31710-ZA1-811 Diode is a genuine OEM component designed for EW140, EW170, EW171, and EXW171 welder generators. As a direct Honda OEM part, it meets the same specifications as the original component installed at the factory. This diode fits all four models in Honda's EW and EXW welder generator lineup, so confirm your unit's serial number against the fitment table before ordering to ensure this is the correct version for your machine.
Key Features
- Genuine OEM Electrical Integrity — sourced directly from Honda, this diode matches the original component's electrical characteristics, ensuring correct one-way current control within the charging circuit.
- Broad Welder Generator Coverage — compatible with the EW140, EW170, EW171, and EXW171 welder generators, covering Honda's EW and EXW series lineup.
- Serial Number Verification Recommended — Honda supersedes electrical components at production breaks, so cross-check your machine's serial number against the fitment table to confirm this is the right diode for your unit.
- Restored Charging Performance — a failed diode can disrupt output regulation and cause erratic power delivery; replacing it restores stable electrical output to both the generator and welding circuits.
A diode is a one-way electrical valve: it allows current to flow in one direction while blocking it in the other. In a welder generator, diodes play a key role in the rectification circuit, converting alternating current from the alternator into the direct current needed by parts of the electrical system. When a diode fails, it can cause voltage irregularities, loss of output, or damage to connected components. Replacing a faulty diode with the correct OEM part restores proper current flow and protects the rest of the electrical circuit.
Part Details
| Part Number | 31710-ZA1-811 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Diode |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Welder Generator | EW171 | 1115969-9999999 |
| Welder Generator | EW140, EW170, 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.
