IDEC Relays RSSDN-25A Relay

The IDEC RSSDN-25A Relay is a high-performance, panel mount solid state relay designed for demanding HVACR and industrial automation environments. Engineered with a dual SCR output and a direct bond copper substrate, this SSR ensures superior thermal management and structural integrity when switching heavy AC loads. It operates with a versatile 3-32Vdc input control voltage, making it fully compatible with various logic controllers and BAS (Building Automation Systems). The zero cross switching technology is critical for reducing electromagnetic interference and protecting sensitive downstream components by ensuring the relay activates only when the AC voltage is near zero.

For field diagnostics, the integrated input status LED indicator provides immediate visual confirmation of the control signal. With a 25Amp continuous output current rating and a high surge capability of up to 300A (1-cycle), the IDEC RSSDN-25A handles high-inrush inductive loads common in motor and heater applications. This unit also features a built-in snubber circuit for internal transient protection, effectively suppressing voltage spikes that could lead to premature failure in noisy electrical environments.

• Zero Crossing Switching: Minimizes electrical noise and inrush current to extend the service life of connected equipment.
• Optical Isolation: Features 4000V dielectric strength between input and output for maximum operator and controller safety.
• Reliable Thermal Design: Utilizes an aluminum baseplate and direct bond copper for efficient heat dissipation during high-amperage operation.
• Status Visibility: Includes a bright LED for rapid troubleshooting of the DC control loop.
• Rugged Construction: Designed with screw terminals for secure mechanical connections in high-vibration HVAC settings.

• What is the minimum load current required for the RSSDN-25A? To ensure proper latching and turn-off, a minimum load current of 50mA is recommended. Small loads may require a shunt resistor to bleed off leakage current.
• Does this relay require a heatsink? For applications approaching the 25A continuous output current rating, a properly sized heatsink and thermal compound are necessary to prevent thermal runaway.
• Can I use this relay to switch 480VAC? Yes, the RSS series is rated for an output voltage range of 48-660VAC, making it suitable for 480V and 600V industrial power systems.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.