The Honda 31135-ZB4-811 Diode Assembly is a genuine OEM component designed for EW140, EW171, and EXW171 welder generators. As a direct Honda OEM part, it meets the same design and performance criteria as the original component it replaces. This Diode Assembly is confirmed for EW140, EW171, and EXW171 machines — always verify your unit's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks.
Key Features
- Genuine OEM Electrical Integrity — sourced directly from Honda, this assembly meets the original rectification and current-flow specifications for these welder generators, not a generic approximation.
- Direct OEM Replacement — engineered to drop into the existing electrical assembly without modification, restoring the charging and welding circuit to its original operating condition.
- Confirmed Fitment — designed for EW140, EW171, and EXW171 welder generators; check your serial number against the compatibility table to confirm the correct application for your unit.
- Protects Charging Output — a failed diode allows AC current to pass uncorrected, degrading both generator output quality and welding arc stability; replacing a faulty unit restores clean DC rectification to the system.
A diode assembly in a welder generator serves as the rectifier stage in the electrical output circuit, converting alternating current produced by the alternator into the direct current required for welding output. It works in conjunction with the generator's power-conditioning components to deliver a stable, usable arc at the welding terminals. When a diode fails — either by opening or shorting — the generator may produce reduced welding output, erratic arc performance, or no welding current at all, making this assembly a critical component for keeping a welder generator operational.
Part Details
| Part Number | 31135-ZB4-811 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Diode Assembly |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Welder Generator | EW140, EW171, 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.
