Industrial-Grade Automatic Water Motor Starter, High-Reliability & Robust Design

3S-31-PA Universal High-Reliability automatic water motor starter

Designed specifically for pump manufacturers, it ensures the stable operation of each water pump with outstanding reliability. Equipped with high-quality components and intelligent protection functions, it protects the motor from damage caused by overload, dry running, overheating, and other issues.

Premium Components：

Chip: ST Industrial MCU (Top 3 globally）

Relay: HONGFA (Top 1 in China and Top 3 globally）

Robust PCB Design

Surge Protection: Built-in multi-layer protection with optimized layout

Key Components: MOV (Metal Oxide Varistor), TVS Diode (Transient Voltage Suppression), Safety Capacitor, Precision Spark Gap

Wide Voltage Input Design

Global Compatibility: 1-Phase AC110-240V / 3-Phase AC220-415V

High-Efficiency PSU: Flyback topology + HF transformer (Isolated)

Triple Protection: EMI filter｜PWM feedback｜Dynamic compensation

Industrial PCB: Power-signal isolation (Surge resistance≥4kV)

Wide-Spaced FPC Connector Design

High-Voltage Safety: Increased creepage distance prevents leakage/arcing (IEC 60664 compliant)

EMI/RFI Immunity: Reduces EFT/ESD interference for stable high-speed signals transmission

Harsh Environment Ready:Dust/moisture resistant (ideal for humid/vibration environments)

Industrial-Grade Safety: Meets insulation and PCB routing standards for industrial use

Manufacturing Process

PCB: Triple-proof coating treatment &in-house developed waterproof coating

Inspection: 14-step traceable quality inspection procedures

Overall, this reliable automatic water motor starter–features water, moisture, and lightning protection, easily adapting to various environments. Meanwhile, it has passed multiple safety and environmental certifications such as EMC and LVD, ensuring the complete water pump units sold by pump manufacturers are of higher quality, reducing after-sales costs and extending the service life of the pump units.

The 3S-31-PA is an ideal choice for pump manufacturers pursuing high reliability and quality, as this automatic water motor starter-integrated control panel provides intelligent protection and stable performance for each water pump.