2N6344AG

Overview

The Littelfuse 2N6344AG is a surface-mount Triac thyristor housed in a TO-220AB package. It features a peak repetitive off-state voltage of 600 V and an on-state RMS current rating of 12 A at a case temperature of +80°C, derating to 6.0 A at +90°C. The device supports a peak non-repetitive surge current of 100 A and operates within a junction temperature range of -40°C to +125°C. Key electrical characteristics include a peak on-state voltage of 1.75 V and gate trigger currents ranging from 6.0 mA to 75 mA depending on the quadrant. The component utilizes diffused and glass-passivated junctions for parameter stability.

Feature Summary

• Surface mount construction with thermowatt design for low thermal resistance and high heat dissipation
• All diffused and glass passivated junctions ensuring greater parameter uniformity and stability
• Gate triggering guaranteed in all four quadrants for versatile AC control applications

Applications

• Full-wave AC control applications such as light dimmers
• Motor controls and heating controls
• Power supplies requiring full-wave silicon gate controlled solid-state devices

Procurement Notes

Verify the specific ordering suffix 'G' indicates a lead-free package configuration when sourcing components. Confirm that the TO-220AB surface mount variant matches the required PCB footprint and mounting style. Ensure compatibility with the specified thermal management requirements given the 12 A RMS current rating at +80°C case temperature.

Selection Notes

Select this component for applications requiring a 600 V blocking voltage and up to 12 A RMS current handling in a surface mount format. Consider the thermal resistance of 2.0 °C/W and the need for adequate heatsinking to maintain case temperatures below +80°C for full current capability. Verify gate drive circuitry can supply the necessary trigger currents across all four operating quadrants.

Part Context

The 2N6344AG belongs to the 2N634xA series of surface mount thyristors manufactured by Littelfuse. This series includes variants with different voltage ratings, such as the 2N6348A and 2N6349A which support up to 800 V. The 'G' suffix specifically denotes the lead-free packaging option within the standard TO-220AB form factor.

Replacement Considerations

Direct replacements within the same family include the 2N6344A (standard package) or other 600 V variants like the 2N6348A if higher voltage tolerance is acceptable. Ensure any substitute maintains the TO-220AB surface mount footprint and similar thermal characteristics.