The Wacker Neuson Terminal Board is a genuine OEM component designed for the HI300D, HI300HD D, and HI400HD series indirect air heaters. Sourced directly from Wacker Neuson, this terminal board is built to the exact electrical specifications of the original part, ensuring correct circuit connections and dependable operation across all compatible heater models. It fits the HI400HD G, HI300HD D, HI400HD D, and HI300D indirect air heaters, giving you confidence that you're installing a part matched precisely to your machine.
Key Features
- Correct Electrical Spec: — Genuine OEM construction ensures proper terminal layout, contact rating, and wiring configuration for safe, accurate electrical distribution in your heater system.
- Direct Drop-In Replacement: — Matches the original mounting footprint and terminal positions, so installation connects straight to your heater's existing wiring harness without adaptation.
- Broad HI-Series Fitment: — Compatible with the HI300D, HI300HD D, HI400HD D, and HI400HD G indirect air heaters, covering both gas and diesel variants in the HI300 and HI400 families.
- Sustained Heat Output: — A fully functional terminal board maintains clean, uninterrupted power distribution to the heater's ignition and control circuits — a failed board can cause erratic ignition, loss of heat, or complete shutdown.
- Electrical Safety Assurance: — As the central wiring junction in the heater's control system, an OEM-spec terminal board is critical to preventing miswiring, arcing, or control faults during operation in demanding jobsite conditions.
- Verified Part Number: — Part 5200021271 is the confirmed Wacker Neuson OEM reference for this terminal board, eliminating guesswork when ordering a replacement.
The terminal board acts as the central electrical junction point within the indirect air heater's control system, routing power and signal connections between the heater's ignition components, thermostat controls, and burner circuits. A properly functioning terminal board ensures every circuit receives the correct voltage and signal path, keeping the heater firing consistently and responding accurately to temperature controls. When the terminal board deteriorates or fails, symptoms can include intermittent ignition, loss of burner control, or a heater that won't start — making prompt replacement essential for maintaining safe, effective heat output on site.
Part Details
| Part Number | 5200021271 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Terminal Board |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| HI 400HD G Indirect Air Heater | HI400HD G | 5000620701 |
| HI 300HD D Indirect Air Heater, Diesel | HI300HDD | 5000620867 |
| HI 400HD D Indirect Air Heater | HI400HDD | 5000620868 |
| HI 300D, HEATER-INDIRECT, DIESEL, -20° | HI300D | 5000620866 |
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.
