SSR-DA Solid State Relay
Zero-Cross Type with High Performance and Reliability for Industrial Applications
Product Overview
The SSR-DA series is a high-performance zero-cross solid state relay designed for industrial automation and control systems. Utilizing advanced semiconductor technology, it provides reliable switching without mechanical contacts, ensuring long service life and silent operation. With input voltage range of 3-32V DC and load voltage capability of 24-380V AC, it offers exceptional compatibility with various control systems and industrial applications. The zero-cross feature minimizes electromagnetic interference and inrush current, making it ideal for resistive and inductive loads.
Key Advantages
Zero-Cross Triggering
Minimizes EMI and inrush current with precise zero-cross detection technology.
Fast Switching
Operate and release time of ≤0.5 cycles +1ms for responsive control.
Wide Voltage Range
Input: 3-32V DC, Load: 24-380V AC for versatile applications.
High Current Capacity
Available in multiple models from 10A to 120A load current ratings.
High Isolation
Excellent dielectric strength of 2500VAC and insulation resistance ≥100MΩ.
Wide Temperature Range
Operates reliably in ambient temperatures from -30°C to 80°C.
Low Leakage Current
Maximum leakage current of 10mA ensures energy efficiency and safety.
Compact & Robust
Durable construction with optimized heat dissipation for industrial environments.
Current Range Options
Industrial Application Scenarios
The SSR-DA series solid state relays are ideal for a wide range of industrial applications where reliable, noiseless switching is required. Their zero-cross operation makes them particularly suitable for controlling resistive and inductive loads with minimal EMI.
Temperature Control Systems
Precise control of heating elements in industrial ovens, packaging machines, and plastic processing equipment.
Key Benefits:
- Long lifespan with no contact wear
- Zero-cross switching prevents current surges
- No acoustic noise during operation
Lighting Control
Dimmable and non-dimmable lighting control in industrial facilities, stages, and architectural lighting.
Key Benefits:
- No audible switching noise
- Extended lamp life with soft switching
- High reliability for continuous operation
Motor Control
Control of small motors, solenoids, and transformers in automation systems and machinery.
Key Benefits:
- Reduced EMI for sensitive control systems
- No contact bounce for precise control
- High resistance to shock and vibration
Power Supplies
Switching and control of power supplies, battery chargers, and UPS systems.
Key Benefits:
- Low leakage current improves efficiency
- High isolation ensures safety
- Wide operating temperature range
HVAC Systems
Control of fans, blowers, and compressors in heating, ventilation, and air conditioning systems.
Key Benefits:
- Silent operation for noise-sensitive environments
- Long service life reduces maintenance
- Reliable performance in varying temperatures
Test & Measurement Equipment
Precise control in laboratory equipment, test benches, and measurement devices.
Key Benefits:
- Minimal EMI prevents interference with sensitive measurements
- Fast switching for precise control
- Compact size for space-constrained applications
Wiring Diagram
Connection Guide:
Proper wiring for DC input control and AC load connections. Ensure correct polarity for DC input and appropriate heatsinking based on load current.
Heatsink Recommendations
Thermal Management:
Proper heatsinking is essential for optimal performance. The required heatsink size depends on load current, ambient temperature, and duty cycle. Consult our technical datasheet for detailed thermal guidelines.
Technical Specifications
| Parameter | Specification |
|---|---|
| Input Voltage Range | 3-32V DC |
| Load Voltage Range | 24-380V AC |
| Load Current Range | 10A, 25A, 40A, 60A, 80A, 100A, 120A |
| Control Method | Zero Cross |
| Operate Time | ≤0.5 cycles of load power +1ms |
| Release Time | ≤0.5 cycles of load power +1ms |
| Leakage Current | 10 mA max |
| Dielectric Strength | 2500 VAC 50/60Hz for 1min |
| Insulation Resistance | ≥100MΩ |
| Ambient Temperature | -30~80℃ |
| Ambient Humidity | 45-85%RH |
| Terminal Fixed Torque | 1.6-2.2N.m |
| Mounting Method | DIN rail or screw mounting |
| Housing Material | Flame-retardant PBT |
| Weight (approx.) | 45g (10A) to 180g (120A) |
Get Technical Support
Contact our engineering team for application assistance
