The Wacker Neuson Relay is a genuine OEM component designed for the G70, G100, and G120 series mobile generators. Sourced directly from Wacker Neuson, this relay meets the exact electrical specifications of the original part — no guesswork, no compatibility concerns. It fits a wide range of T4i configurations across the G70, G100, and G120 generator lines, including Standard, Cold Weather, Custom, Extended Run, and Hertz variants, as well as earlier mobile generator models in the G100 and G120 series.
Key Features
- OEM-Rated Switching Capacity — Manufactured to the original circuit load and voltage specifications, ensuring the relay operates the electrical circuit exactly as designed.
- Direct Plug-In Replacement — Matches the original connector configuration and mounting footprint, dropping straight into the existing relay socket without modifications to wiring or brackets.
- Broad G-Series Generator Coverage — Fits G70, G100, and G120 generator models across Standard, Cold Weather, Custom, Extended Run, and Hertz T4i configurations, plus select mobile generator variants.
- Protects Generator Output Circuits — A correctly functioning relay ensures controlled switching of electrical loads; a failed relay can cause generator output faults, starting failures, or uncontrolled circuit behavior.
- Electrical Safety Compliance — As a switching component in a generator's control circuit, using an OEM-spec relay maintains correct fault protection behavior and prevents unintended energization of downstream components.
A relay is an electrically operated switch that controls a high-current or high-voltage circuit using a low-power signal from the generator's control system. In mobile generators like the G70, G100, and G120, relays are used to manage critical functions such as engine starting circuits, output contactor control, and protective shutdowns. When a relay fails — whether through contact wear, coil burnout, or corrosion — the circuit it controls will either stop responding or may fail to cut out when required, leading to operational faults or potential damage to connected equipment.
Part Details
| Part Number | 5200004405 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Relay |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Mobile Generators | G100 | 5200001319, 5200003859, 5200003857, 5200003858, 5200008716 |
| Mobile Generators | G120 | 5200001320, 5200003856, 5200003854, 5200003855, 5200008715, 5200008353 |
| G70 Generator, Custom T4i | G70 | 5200003975, 5200003973, 5200003974, 5200004151, 5200008719, 5100025262 |
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.
