The MCR708AG is a sensitive gate silicon controlled rectifier (SCR) from Littelfuse Inc., designed for applications requiring high sensitivity and reliable switching performance. This SCR is commonly used in low-current triggering circuits and control systems where precise gate control is essential.

Applications

• Solid-State Relays (SSRs): Triggering the main switching device in solid-state relays.
• Light Dimmers: Controlling the intensity of lighting systems.
• Motor Speed Control: Regulating the speed of small DC motors.
• Temperature Control: Switching heating elements in temperature control systems.
• Ignition Circuits: Triggering ignition systems in small engines.
• Sensing Circuits: Detecting and responding to changes in sensor inputs.

Features

• Sensitive Gate Triggering: Requires a low gate current to trigger the SCR, making it suitable for low-power control circuits.
• High Surge Current Capability: Withstands high surge currents, providing reliable operation under transient conditions.
• Low On-State Voltage: Minimizes power dissipation and improves efficiency.
• High Blocking Voltage: Offers a high blocking voltage, ensuring reliable operation in high-voltage applications.
• RoHS Compliant: Complies with the Restriction of Hazardous Substances directive.
• Through-Hole Package: Facilitates easy mounting on printed circuit boards.

Benefits

• Simplified Circuit Design: Sensitive gate triggering simplifies the design of control circuits.
• Improved Reliability: High surge current capability ensures reliable operation under transient conditions.
• Increased Efficiency: Low on-state voltage minimizes power dissipation.
• Versatile Application: Suitable for a wide range of low-power control applications.
• Cost-Effective Solution: Provides reliable performance at a competitive price.

Additional Details

The MCR708AG typically has a gate trigger current (IGT) of 200 μA and a holding current (IH) of 5 mA. Its on-state current (IT(RMS)) is around 0.8 A, and its peak surge current (ITSM) can reach up to 8 A. The operating temperature range usually spans from -40°C to +125°C. The device is typically housed in a TO-92 package. The 'AG' suffix likely indicates a specific lead forming or packaging option.