The Honda 31710-ZB4-731 Diode Assembly is a genuine OEM component designed for Honda EB3500, EB5000, EM3500, and EM5000 generators. As an authentic Honda part, it is manufactured to the same specification as the original unit, ensuring a direct, correct-fit replacement when the factory component needs to be renewed. Confirm your generator's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and fit can vary within a model line. This diode assembly is the straightforward solution for restoring proper electrical output on these generators.
Key Features
- Genuine OEM Electrical Integrity — sourced directly from Honda, this assembly meets the original rectification specification for the alternator circuit, ensuring correct voltage conversion and protecting downstream electrical components.
- Direct OEM Replacement — engineered to swap in place of the original unit on EB3500, EB5000, EM3500, and EM5000 generators without alteration.
- Check Your Serial Number — Honda updates parts at production breaks, so verify your generator's serial number against the fitment table to confirm this is the correct assembly for your unit.
- Restores Charging Output — a failed diode allows AC voltage to pass uncorrected into DC circuits, causing battery charging failure and erratic power output; replacing this assembly brings the rectifier circuit back to proper operation.
The diode assembly is a key component in the generator's alternator circuit, where it rectifies the AC voltage produced by the alternator windings into the DC voltage needed to charge the battery and power DC loads. It works by allowing current to flow in only one direction, blocking the reverse half of the AC cycle. When a diode within the assembly fails — either open or shorted — the generator may lose its battery-charging function entirely, produce unstable DC output, or in some failure modes damage other electrical components. Replacing a faulty diode assembly with a genuine Honda part restores correct rectification and reliable electrical performance to the generator.
Part Details
| Part Number | 31710-ZB4-731 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Diode Assembly |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EB3500, EB5000, EM3500, EM5000 | 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.
