Fotek SSR-25 25A solid state relay for efficient electrical control

The Fotek SSR-25 25A solid state relay is an electronic device designed to control electrical loads without mechanical contact, offering an efficient and reliable solution for industrial and domestic applications.

This relay operates with a low-voltage control signal (3-32 VDC) and can handle AC loads of up to 25 amperes, with an output voltage between 24 and 380 VCA. Its contactless design eliminates mechanical wear, increasing service life and reducing maintenance.

Main features

• Control input: 3-32 VDC with input current between 3 and 25 mA.
• Load capacity: 25A with output voltage of 24-380 VCA.
• Low on-state voltage drop: 1.5V, improving energy efficiency.
• Fast response time: 10 ms for switching on and off.
• High resistance to electromagnetic interference and vibration.
• LED indicator to monitor operating status.
• Compact, corrosion-resistant design with screw mounting.
• Operating temperature range: -30 to 75 °C.

Typical uses

This relay is ideal for controlling resistive electrical appliances, especially heating systems such as electric cables and pipes. It is commonly used in temperature control instruments and industrial automation to switch loads on and off accurately and quietly.

Installation considerations

• It is recommended to leave a current margin of 3/2 relative to the rated current to avoid overloads.
• For loads above 5A, it is important to ensure adequate heat dissipation, using heatsinks specifically designed for solid state relays.
• Compatible with TTL, DTL and HTL integrated circuits.

Differences from mechanical relays

Unlike mechanical relays, the SSR has no moving parts, which eliminates noise, sparks and contact wear. This makes it quieter, more durable and suitable for applications that require fast and frequent switching.

Compatibility and maintenance

This relay is compatible with a wide range of electronic and electrical systems, provided the current and voltage parameters are respected. It does not require frequent maintenance thanks to its solid-state, contactless design.

• Controls electrical loads up to 25A with an output voltage of 24-380 VCA.
• Low-voltage control input between 3-32 VDC and current of 3-25 mA.
• Fast 10 ms switching time for on and off.
• Contactless design for greater durability and silent operation.
• LED indicator for operating status.
• Easy screw-mounted installation.
• Compatible with TTL, DTL and HTL circuits.
• Requires heat dissipation for loads above 5A.