Description SSC-25: 25A Soft Start Controller for AC Motors The SSC-25 Soft Start Controller is a compact, mains-operated soft-start power module designed to deliver smooth, controlled start-up of AC loads, reducing mechanical stress, electrical shock and nuisance tripping. Suitable for 110V and 230V AC systems, the SSC-25 is ideal for applications where high inrush current can shorten equipment life or disrupt power supplies. With an adjustable ramp-up time from 1 to 60 seconds and a configurable 10–50% pedestal voltage, the SSC-25 allows precise control of start-up behaviour across a wide range of loads. Whether used with heat lamps, fans, pumps or AC motor loads, it provides reliable performance, improved efficiency and enhanced equipment protection. Designed for straightforward integration, this soft-start module is a practical upgrade for systems requiring gentle acceleration, reduced peak current and long-term operational stability. Key Features Smooth Soft-Start ControlGradually increases output voltage to minimise inrush current and electrical stress. Adjustable Ramp-Up Time (1–60 Seconds)Allows tailored start-up profiles for different motors and resistive loads. Adjustable Pedestal Voltage (10–50%)Sets the initial start voltage for optimal performance across varying applications. High Inrush Current CapabilityHandles up to 25A RMS when mounted on a suitable heatsink. Wide Voltage CompatibilitySuitable for 110V or 230V AC systems at 50/60Hz. Compact, User-Friendly DesignSpace-saving module with simple controls and minimal setup requirements. Straightforward Wiring LayoutSimplifies installation and reduces commissioning time. Improved Equipment ProtectionHelps protect connected devices from transient voltages and sudden power surges. Applications The SSC-25 Soft Start Controller is ideal for a wide range of commercial and industrial applications, including: Heat lamps and infrared heaters Fans and ventilation systems Pumps and fluid handling equipment AC motor loads General-purpose soft-start applications Its flexible configuration makes it suitable for both new installations and retrofit projects where controlled start-up is essential. Important Note The SSC-25 Soft Start Controller is designed to operate with a direct AC input. Any limitation, modification or conditioning of the AC supply may affect product performance and should be carefully evaluated during system design. TECHNICAL SPECIFICATIONS Input Supply Line Voltage (AC Supply)110/230V ± 10% Line Frequency50/60Hz Unit Limiting RMS current25A I²t for fusing250 A²s Triac limiting RMS current26A Isolation voltage5kV rms Minimum operating current200mA Ramp speed1 to 60 seconds Unit current consumption20mA dc max Pedestal10 to 50% Operating temperature-20 to 85°C Storage temperature0 to 65°C Phase OperationSingle Phase Max. Peak Voltage207Vac to 253Vac Order Code Farnell: 1213104 RS Stock No.: 330-5358
