[Lifetime Warranty] SSR-40DD Solid State Relay - Pack of 2

SSR-40DD 40A Relay Input 3-32VDC Output 5-200VDC Single Phase Solid State Relay Module - Pack of 2

Key Features

• Package includes: 2 x SSR-40DD Solid State Relays
• Model: SSR-40DD
• Type: Single Phase, DC-to-DC (DC-DC) Solid State Relay
• Maximum Load Current: 40A
• Control Input Voltage: 3-32V DC
• Load Output Voltage: 5-200V DC
• Response Time: Fast switching with no mechanical parts
• Mounting: Surface mount with screw terminals

Replaces / Cross-Reference Part Numbers

• SSR-40DD
• Serves as a direct replacement for other solid state relays with identical voltage and amperage specifications.

Compatibility & Fitment

• Designed for general-purpose, single-phase DC load switching applications.
• Suitable for industrial automation, temperature controllers, heating and cooling systems, DC motor control, and other high-power DC circuits.
• Compatible with systems requiring a 40A DC load to be switched by a low-voltage (3-32V) DC control signal.

When to Replace

• The relay fails to activate the load circuit when a control signal is applied.
• The relay remains stuck in the "on" position, continuously powering the load circuit.
• Operation is intermittent or unreliable.
• Visible signs of overheating, discoloration, or physical damage to the relay housing.

Installation Tips

• Disconnect all power sources before beginning installation.
• Ensure correct polarity for both input control and output load connections.
• A heat sink is required when operating at or near the maximum rated current to dissipate heat effectively.
• Securely mount the relay on a flat, clean surface for optimal heat transfer to the heat sink.
• Verify all wire connections are tight and secure at the screw terminals.