The Wacker Neuson Relay With Diode is a genuine OEM electrical component designed for the G-series skid-mounted and mobile generator lineup, spanning models from the G20 and G25 through the G70, G85, G100, G120, G150, G180, G230, and G240. As a direct factory replacement, part is manufactured to the exact specifications of the original unit it replaces, ensuring correct electrical behavior across the full range of compatible configurations including standard, cold weather, custom, and extended run tank variants. Wacker Neuson genuine OEM parts are sourced directly through authorized distribution channels, giving you confidence that the component you receive matches what left the factory. Verify your generator model number before ordering to confirm fitment with this relay assembly.
Key Features
- Integrated Diode Protection — The built-in diode suppresses voltage spikes generated when the relay coil de-energizes, protecting downstream control circuitry from back-EMF damage.
- Genuine OEM Electrical Specification — Manufactured to the exact coil resistance, contact rating, and switching characteristics of the original relay, ensuring correct load switching behavior in the generator control circuit.
- Drop-In Replacement — Designed to seat directly into the original relay socket with matching terminal configuration, requiring no rewiring or bracket modification.
- Broad G-Series Compatibility — Fits a wide range of Wacker Neuson G-series portable generators from the G20 through the G240, covering standard, cold weather, custom, and extended run configurations across multiple Tier emissions levels.
- Supports Stable Generator Control Operation — A failed relay can cause starting failures, loss of output control, or erratic panel behavior; replacing it with a correctly rated unit restores normal electrical switching and generator control function.
A relay is an electrically operated switch that allows a low-current control signal — such as one from the generator's control panel or start circuit — to switch a higher-current load on or off without direct mechanical contact between the two circuits. In a portable generator, relays are used throughout the control and protection circuitry to manage functions such as engine starting, fault shutdowns, and output switching. The integrated diode in this assembly is wired in parallel with the relay coil to clamp the inductive voltage spike that occurs each time the coil is switched off, preventing that spike from damaging sensitive electronic components on the control board. When a relay fails, symptoms typically include the generator failing to start, a function that no longer responds to panel commands, or a fault condition that cannot be cleared — all of which point to a switching component that is no longer making or breaking its circuit correctly.
Part Details
| Part Number | 5000164957 |
|---|---|
| Old Part Number | 0164957 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Relay With Diode |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Skid-mounted Mobile Generator, Custom | G70 | 5000620352, 5000620350, 5000620351, 5000009367, 5000009468, 5000620002, 5000620648, 5000620647, 5000620711, 5000620646, 5200001318, 5200003220, 5200006879, 5200014464, 5000620708, 5200014463, 5200014465, 5200008344, 5200008342, 5200008343, 5200008339, 5200008341, 5200008340, 5100025814, 5100025838 |
| Skid-mounted Mobile Generator | G50 | 5000009467, 5000009366, 5000620001, 5200001062, 5200001063, 5200006878, 5200001317, 5200001060, 5200001061, 5000620707, 5000620710, 5000620964, 5000620965, 5000620966, 5100025812 |
| Mobile Generator, Custom | G25 | 5000620346, 5000620344, 5000620345, 5000620642, 5000009466, 5000620004, 5000620640, 5000620709, 5000620641, 5000009368, 5200005557, 5200003991, 5000620931, 5200001316, 5200014461, 5200014460, 5200014462, 5000621005, 5100041584, 5100045084, 5100041580, 5100041592, 5000620706, 5100022834, 5100041581, 5100041582, 5100041583, 5100045541, 5100045542, 5100050326, 5100042507, 5100042510, 5100042512, 5100042509, 5100025836, 5100042508 |
| Mobile Generator | G85 | 5000009459, 5000620003, 5000009369 |
| G100-GENERATOR, SKID, CUSTOM, DEERE T3 | G100 | 5000620651, 5000620650, 5000620649, 5200003158, 5200006900, 5000620312, 5000620313, 5000620314, 5200001319, 5200008348, 5200008346, 5200008347, 5200008345, 5100025816 |
| G120-GENERATOR, SKID, CUSTOM, DEERE T3 | G120 | 5000620654, 5000620653, 5000620652, 5200006901, 5200003159, 5200014467, 5200014468, 5000620311, 5200014466, 5000620309, 5000620310, 5200001320, 5200008350, 5200008351, 5200008349, 5100025818, 5100025840 |
| G150-GENERATOR, SKID, CUSTOM, DEERE T3 | G150 | 5000620657, 5200006902, 5000620656, 5000620306, 5000620655, 5200003160, 5000620889, 5000620307, 5000620308, 5000620887, 5000620888, 5200014784, 5200010135, 5200010136, 5200010137, 5200001321, 5100025830, 5200007860 |
| G180-GENERATOR, SKID, CUSTOM, DEERE T3 | G180 | 5000620660, 5200006903, 5000620303, 5000620659, 5200003161, 5000620886, 5000620884, 5000620304, 5000620885, 5000620305, 5200010140, 5200010138, 5200010139, 5200001322, 5100045089, 5100045575, 5100045576, 5100045590, 5100045591, 5100045592, 5100049844, 5100049845, 5100025832, 5200007861 |
| G240-GENERATOR, SKID, CUSTOM, DEERE T3 | G240 | 5000620663, 5200006904, 5000620662, 5000620300, 5000620661, 5200003162, 5000620301, 5000620302, 5200001323, 5100025834 |
| G230 Generator, Custom T4i | G230 | 5000620883, 5000620881, 5000620882, 5200010141, 5200010142, 5200010143, 5100045190, 5100045596, 5100045597, 5100049846, 5100049847, 5200007862 |
| Mobile Generator | G20 | 5200016628, 5200022625 |
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.
