C122F1

Scrs Overview

The C122F1G is a silicon controlled rectifier (SCR) reverse blocking thyristor designed for full-wave AC control applications. It features glass passivated junctions and center gate fire technology to ensure parameter uniformity and stability. The device utilizes a rugged Thermowatt construction in a TO-220AB package, providing low thermal resistance and high heat dissipation capabilities. Key electrical ratings include a peak repetitive off-state voltage of 50 V, an on-state RMS current of 8.0 A at 75°C case temperature, and a peak non-repetitive surge current of 90 A. The operating junction temperature range extends from -40°C to +125°C.

Scrs Feature Summary

• Glass passivated junctions and center gate fire design for enhanced parameter uniformity and stability
• Small, rugged Thermowatt construction offering low thermal resistance and high durability
• Reverse blocking thyristor architecture suitable for solid-state switching

Scrs Applications

• Full-wave AC motor controls
• Heating controls
• Power supplies requiring half-wave silicon gate-controlled devices

Scrs Procurement Notes

Verify the specific ordering suffix 'G' indicates a lead-free package configuration as documented in the datasheet. Confirm that the component meets RoHS compliance requirements if applicable to your manufacturing process. Ensure the procurement channel provides original manufacturer documentation to validate authenticity and traceability. Check for any regional regulatory restrictions regarding tin/lead or lead-free soldering standards before finalizing orders.

Scrs Selection Notes

Select this component when a 50 V blocking voltage and 8 A RMS current rating are sufficient for the load. Consider the TO-220AB package for through-hole mounting and adequate heat sinking. Evaluate the thermal resistance characteristics against the expected ambient temperature and conduction angle. Ensure the gate trigger current and voltage specifications align with the driving circuit capabilities for reliable turn-on.

Scrs Part Context

This device belongs to the C122 series of silicon controlled rectifiers manufactured by onsemi. The series includes variants with different voltage ratings, such as the C122A and C122B, which offer higher blocking voltages while maintaining similar current handling capabilities. These components are engineered for robust performance in industrial power control environments.

Scrs Replacement Considerations

Direct replacements within the same family include the C122A and C122B, which share identical current and thermal characteristics but differ in their peak repetitive off-state voltage ratings. Verify that the alternative part number's voltage rating exceeds the maximum circuit voltage to prevent breakdown.