The Wacker Neuson Thermal Switch is a genuine OEM component designed for PS3 and PS4 series submersible pumps, including the PS3 5503, PS4 5503, PS4 7503HH, and PS4 7503HF models. As a direct OEM replacement, the is manufactured to the same specification as the original part, ensuring correct calibration and reliable thermal protection for your pump motor. Sourced directly through authorized Wacker Neuson supply channels, this switch installs in place of the original with no guesswork — the part number match confirms compatibility before you order.
Key Features
- OEM-Calibrated Trip Point — Engineered to open at the correct temperature threshold for these high-amperage submersible motors, protecting windings from heat damage without nuisance tripping.
- Direct Drop-In Replacement — Matches the original switch's electrical connector, mounting position, and terminal configuration for a straightforward swap inside the motor housing.
- PS3 and PS4 Series Compatibility — Confirmed fitment across the PS3 5503, PS4 5503, PS4 7503HH, and PS4 7503HF submersible pump models running on 220V/60Hz power.
- Motor Protection Where It Counts — A correctly functioning thermal switch shuts the pump down before overheating causes winding failure; a failed switch leaves a high-draw motor completely unprotected.
- Electrical Safety Compliance — Genuine OEM construction ensures the switch meets the original design ratings for high-current submersible pump applications, where an undersized or mismatched thermal device presents a real risk of motor burnout or electrical fault.
A thermal switch is a temperature-activated safety device mounted inside the submersible pump motor. When the motor's internal temperature rises beyond a safe operating limit — typically caused by running dry, excessive load, or restricted flow — the switch opens the circuit and cuts power before heat can damage the motor windings. Once the motor cools to a safe temperature, the switch resets and allows normal operation to resume. A failed or out-of-spec thermal switch can mean either unprotected motor operation or a pump that won't run at all, making this a critical component to replace with a correctly rated part.
Part Details
| Part Number | 5000150566 |
|---|---|
| Old Part Number | 0150566 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Thermal Switch |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PS3 5503 Sub. Pump, 220V/60hz, 7.5hp, 19.5A | PS35503 | 5000009141 |
| PS4 5503 Sub. Pump, 220V/60hz, 7.5hp, 19.5A | PS45503 | 5000009144 |
| PS4 7503HH Sub. Pump, 220V/60hz, 10hp, 25.5A | PS47503HH | 5000009147 |
| 100mm/4in Submersible Pump 220 V/60Hz High Output | PS47503HF | 5000009150 |
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.
