The Soft Start Controller SSC-25 PLUS, developed by United Automation, is a mains-operated soft-start power module designed to optimise electrical performance. With its adjustable ramp-up speed, delay control, and compact design, this advanced controller ensures seamless and controlled startups, extending equipment lifespan while improving energy efficiency.

Why Use a Soft Start Controller?
When electrical equipment is switched on, it often draws a large inrush current that can cause:
- Voltage fluctuations impacting system stability
- Excessive wear and tear on motors and heating elements
- Circuit breaker trips, leading to costly downtime
A soft start controller, such as the SSC-25 PLUS, gradually increases voltage instead of delivering full power instantly. This smooth transition reduces electrical stress, protects components, and enhances overall performance.
Key Features of the Soft Start Controller SSC-25 PLUS
- Adjustable Ramp Speed – Customisable 1 to 60 seconds ramp-up for controlled acceleration.
- Startup Pedestal Control – Adjust voltage from 10% to 50% to match application needs.
- High Inrush Capability – Handles up to 25A (with proper heatsinking).
- Delay Control – Configurable startup delay between 1 to 60 seconds.
- Compact & Easy to Install – Designed for effortless DIN rail mounting and wiring.
- Reliable Protection – Prevents transient voltages and power surges, ensuring system stability.
Applications of the SSC-25 PLUS
The Soft Start Controller SSC-25 PLUS is an ideal soft start solution for industries requiring controlled power application in:
- Heat Lamps – Ensures smooth startup, extending lamp lifespan.
- Fans & Blowers – Prevents sudden power spikes, improving efficiency.
- Pumps & Compressors – Reduces mechanical strain, enhancing durability.
- Industrial AC Motor Loads – Protects against overcurrent damage.

Technical Specifications
Specification | Details |
AC Line Voltage | 230V ±10% |
Frequency | 50/60Hz |
RMS Current | 25A |
I²t for Fusing | 250 A²s |
Triac RMS Current | 26A |
Isolation Voltage | 5kV rms |
Operating Current | 200mA min. |
Ramp Speed | 1 to 60 seconds |
Delay Time | 1 to 60 seconds |
Pedestal Range | 10% to 50% |
Operating Temperature | -20°C to 85°C |
LED Status Indications
- Delay Phase: LED blinks BLUE
- Ramp Speed: Starts RED, turns GREEN as ramp completes
- Error (Zero Crossing Not Detected): Fast blinking RED & BLUE LEDs
Why Choose United Automation?
With decades of experience in industrial power control solutions, United Automation is committed to delivering innovative, high-quality soft start controllers. The SSC-25 PLUS is engineered for reliability, energy efficiency, and superior performance, making it a must-have for industrial power applications.
Enhance your power control systems today! Get the SSC-25 PLUS now at United Automation.