The Wacker Neuson Thermal Switch is a genuine OEM component designed for PS4-11003HH and PS4-11003HF series submersible pumps. As a direct OEM replacement, this switch is manufactured to the same specifications as the original part, ensuring correct operation within the pump's motor protection circuit. This part fits a broad range of PS4-11003HH and PS4-11003HF configurations spanning 400 V/50Hz and 440 V/60Hz variants, covering both High Head and High Output pump models.
Key Features
- Genuine OEM Motor Protection: — Matched to the exact trip threshold of the original switch, so the motor cuts out at the correct temperature — not too early, not too late.
- Drop-In Replacement: — Engineered to the same connector and mounting configuration as the factory-installed switch, allowing straightforward installation in the motor winding circuit.
- Broad PS4 Series Coverage: — Confirmed fit across PS4-11003HH High Head and PS4-11003HF High Output models in both 400 V/50Hz and 440 V/60Hz configurations.
- Motor Overheating Defense: — A correctly functioning thermal switch interrupts power the moment winding temperatures reach a critical threshold, preventing insulation breakdown and motor burnout.
- Electrical Safety Compliance: — Restores the pump's built-in thermal overload protection, a critical safety function for electrically powered submersible equipment operating in wet environments.
A thermal switch is a temperature-sensitive safety device embedded in the motor windings of a submersible pump. When the motor runs too hot — due to dry running, blocked flow, or overload — the thermal switch opens the circuit and cuts power before heat can damage the winding insulation. Once the motor cools to a safe temperature, the switch resets and allows normal operation to resume. A failed or bypassed thermal switch leaves the motor fully exposed to heat damage, which can result in winding failure and a complete motor replacement.
Part Details
| Part Number | 5000150866 |
|---|---|
| Old Part Number | 0150866 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Thermal Switch |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PS4-11003HH | PS411003HH | 5000008876, 5000009154, 5000008867, 5000008869, 5000008870, 5000008877, 5000009208 |
| PS4-11003HF | PS411003HF | 5000008878, 5000009157, 5000008871, 5000008873, 5000008874, 5000008879, 5000009210 |
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.
