24-380VAC 25A Solid State Relay

A 25 A solid state relay (SSR) for switching 24–380 V AC loads from a 3–32 V DC control signal — with zero-crossing switching, instant silent operation, and complete electrical isolation. Replaces mechanical relays in high-cycle applications where contact wear, noise, and sparking are unacceptable.

🔹 Key Applications

• Temperature controller switching for ovens and kilns
• PID controller AC heater element switching
• CNC machine spindle enable/disable control
• Industrial motor soft-start switching
• Lighting dimmer stage (with phase-control compatible SSR)
• High-frequency switching applications (>1000 cycles/day)

🔹 Why Choose This Module?

• 25 A continuous current — handles large AC loads
• Zero-crossing switching — eliminates switching noise and load transients
• Silent operation — no mechanical click or contact wear
• Complete electrical isolation — MCU fully protected from mains voltage
• LED indicator — visual output status confirmation
• Compact DIN-rail or panel mountable

🔹 Technical Specifications

• Control Input: 3 – 32 V DC
• Load Voltage: 24 – 380 V AC
• Load Current: 25 A continuous
• Switching: Zero-crossing
• Isolation: Optical (full AC/DC isolation)
• Indicator: LED

🔹 What's Included

1 × 24–380VAC 25A Solid State Relay

🔹 Pro Tip

💡 Always mount SSRs on an aluminium heatsink — even at 80% efficiency, 25 A × Vdrop generates significant heat. For a 25 A SSR, a heatsink of at least 1°C/W is required for continuous operation. Use a thermal compound between SSR and heatsink for optimal heat transfer.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.