The Wacker Neuson 5200020301 Diode is a genuine OEM component designed for the APT4T and APT4S submersible pump series, including surge brake, electric brake, and cold weather configurations. As a genuine OEM part, it is manufactured to the exact electrical specifications required for proper operation of the pump's braking and control circuits. This diode fits across the full APT4T and APT4S model range, covering both standard and cold weather variants, making it a reliable choice for maintaining correct electrical function. Verify your model number against the fitment list before ordering to ensure compatibility.
Key Features
- Genuine OEM Electrical Specification — Manufactured to the exact forward voltage and current rating required by the APT4T and APT4S control circuits, ensuring correct signal behavior and circuit protection.
- Direct Plug-In Replacement — Matches the original component's lead configuration and housing for a straightforward installation into the existing electrical circuit without modification.
- Broad APT4T and APT4S Fitment — Compatible with surge brake, electric brake, and cold weather variants across the APT4T and APT4S pump series.
- Circuit Protection Where It Counts — A correctly functioning diode prevents reverse current flow in the brake control circuit; a failed diode can cause erratic braking behavior or complete brake system failure.
- Safety-Critical Brake System Component — This diode is part of the surge or electric brake electrical circuit; using a correctly rated OEM replacement supports proper trailer brake response and road safety compliance.
A diode is a one-way electrical valve that allows current to flow in only one direction through a circuit. In the APT4T and APT4S pump trailer systems, it plays a key role in the brake control circuit by preventing reverse voltage from interfering with brake actuation signals. When a diode fails, the result can range from inconsistent brake engagement to a complete loss of braking function — a serious safety concern during transport. Replacing a faulty diode with the correct OEM part restores proper circuit behavior and ensures the braking system operates as intended.
Part Details
| Part Number | 5200020301 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Diode |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| APT4T Pump, Surge Brake, Cold Weather | APT4T CW | 5200019792, 5200019793 |
| APT4T Pump, Surge Brake | APT4T | 5200019643, 5200019644 |
| APT4S Pump w/Skid | APT4S | 5200018977 |
| APT4S Pump w/Skid, Cold Weather | APT4S CW | 5200019798 |
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.
