BT169D/DG,126

Scrs Overview

The BT169D/DG,126 is a planar passivated silicon controlled rectifier (SCR) manufactured by WeEn Semiconductors. It features a sensitive gate design housed in a SOT54 (TO-92) plastic package with three leads. The device supports a maximum repetitive peak off-state voltage of 400 V and an RMS on-state current of 0.8 A. It is engineered for direct interfacing with microcontrollers and logic ICs due to its low gate trigger requirements.

Scrs Feature Summary

• Sensitive gate architecture enables direct interface with low-power control circuits
• Planar passivation ensures voltage ruggedness and long-term reliability
• Through-hole TO-92 packaging facilitates standard board mounting

Scrs Applications

• Ignition circuits
• Lighting ballasts
• Protection circuits

Scrs Procurement Notes

Verify the specific suffix 'DG' against official WeSem datasheets to confirm pinout or marking variations. Ensure the selected variant matches the required thermal and electrical specifications for the target application environment. Cross-reference ordering codes with manufacturer documentation to avoid substitution errors.

Scrs Selection Notes

Select this component when a compact SCR with high sensitivity is required for low-current switching applications. The TO-92 package is suitable for space-constrained designs. Verify that the 400 V blocking voltage meets the circuit's peak transient requirements and that the 0.8 A RMS rating accommodates the load current.

Scrs Part Context

This part belongs to the BT169 series of Silicon Controlled Rectifiers from WeEn Semiconductors. The series is characterized by robust construction and sensitive gate triggering, making it a standard choice for general-purpose AC power control and switching tasks in consumer and industrial electronics.

Scrs Replacement Considerations

Check for equivalents such as the NXP BT169D or WeEn BT169D-L. Confirm that substitute parts maintain identical pin configurations, voltage ratings, and gate sensitivity levels to ensure functional compatibility without circuit redesign.