The TLP120GR is a high-isolation, small-outline photorelay manufactured by Toshiba Semiconductor and Storage. It's designed for applications requiring electrical isolation between the control circuit and the load circuit. This photorelay offers a normally open (1-Form-A) contact configuration and utilizes a gallium arsenide infrared emitting diode (IRED) as the input and a silicon photoMOS FET as the output switch.

Applications

• Programmable Logic Controllers (PLCs): Used for isolating input/output modules.
• Measuring Instruments: Provides isolation in sensitive measurement equipment.
• Security Systems: Isolates sensors and control circuits for enhanced safety.
• Telecommunication Equipment: Used in line cards and modems for signal isolation.
• Office Automation Equipment: Employed in printers, copiers, and fax machines.

Features

• High Isolation Voltage: Offers a high isolation voltage between input and output, ensuring safety and preventing ground loops.
• Small Outline Package: Compact design allows for high-density mounting on PCBs.
• Low On-Resistance: Minimizes voltage drop and power dissipation across the switch.
• Fast Switching Speed: Enables rapid switching between on and off states.
• Low Input Control Current: Requires minimal current to activate the relay.
• Normally Open (1-Form-A) Contact: Provides a simple on/off switching function.

Benefits

• Enhanced Safety: High isolation voltage protects equipment and personnel from voltage surges and electrical noise.
• Space Savings: Small package size allows for compact designs and increased component density.
• Improved Efficiency: Low on-resistance minimizes power loss, leading to more efficient operation.
• Reliable Performance: Solid-state design provides long-term reliability and eliminates mechanical wear.
• Simplified Circuit Design: Easy to integrate into various circuit configurations.

Additional Details

The TLP120GR features an IRED that emits infrared light when current is applied. This light activates the photoMOS FET, which then closes the output circuit. Key electrical specifications include a high isolation voltage (typically in the kV range), a low on-resistance (typically a few ohms), and a fast turn-on and turn-off time (typically in the microsecond range). It's crucial to consult the datasheet for precise electrical characteristics, thermal considerations, and recommended operating conditions. This device complies with industry standards for safety and environmental protection.