SDA3-20 Series

The SDA3-20 is a high-performance three-phase solid-state contactor designed for high-load switching applications up to 480VAC with a 20A per phase current rating. It features zero-cross switching technology, ensuring smooth, noise-free operation with minimal electromagnetic interference, making it ideal for motor control, HVAC systems, heating applications, energy management, and industrial automation.

Equipped with an LED status indicator, the SDA3-20 allows for easy monitoring of switch status. Additionally, its integrated heat sink design enhances thermal dissipation, ensuring stable and long-lasting operation. With a wide control voltage range (4V32VDC and 90V250VAC), this unit is adaptable to various control systems. UL certification guarantees compliance with safety and quality standards.

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Key Features
Applications
Specification

High Load Capacity – Supports up to 480VAC load voltage, suitable for industrial applications.
Stable & Noise-Free Switching – Utilizes zero-cross switching technology, reducing electromagnetic interference and switching noise.
Enhanced Thermal Management – Integrated heat sink for improved cooling and long-term stability.
Dual-Mode Control Voltage – Accepts 4V32VDC and 90V250VAC for versatile system compatibility.
LED Status Indicator – Allows for easy operation monitoring.
Industrial-Grade Durability – Designed for heavy-duty environments, ensuring long-lasting performance.
UL Certified – Compliant with international safety and quality standards.

HVAC (Heating, Ventilation, and Air Conditioning) Systems
Industrial Automation & Process Control
Motor Starting & Operation Control
Electric Heating & Temperature Regulation
Energy Management & Power Distribution
Industrial Lighting & Load Switching Applications

Parameter	Specification
Maximum Switching Voltage	480VAC
Contact Configuration	3PST (No Mechanical Contacts)
Rated Current	20A (per phase)
Control Voltage	4V32VDC, 90V250VAC
Switch Type	Solid State (No Mechanical Wear)
Compatible Socket	-
Dimensions (L × W × H)	100 × 110 × 130 mm
Certifications	UL Certified