BT151-500R,127

Scrs Overview

The BT151-500R,127 is a planar passivated Silicon Controlled Rectifier (SCR) manufactured by WeEn Semiconductors. It is housed in a SOT78 plastic package, equivalent to TO-220AB. The device supports a repetitive peak reverse and direct off-state voltage of 500 V. It handles an average on-state current of 7.5 A and a root mean square on-state current of 12 A. The non-repetitive peak on-state surge current rating is 100 A. Maximum gate trigger current is specified at 15 mA. The maximum junction temperature is 125 °C.

Scrs Feature Summary

• Planar passivated silicon construction for robust bidirectional blocking voltage capability
• Designed for high thermal cycling performance in industrial environments
• High surge current capability suitable for demanding power switching applications

Scrs Applications

• Motor control systems
• Industrial power regulation
• General purpose AC switching

Scrs Procurement Notes

Verify the specific manufacturer origin, as this part number is produced by multiple vendors including NXP and WeEn Semiconductors. Confirm that the ordering suffix matches the required package variant and compliance standards. Ensure the component status is active for volume production before finalizing procurement plans.

Scrs Selection Notes

Select this component when a through-hole SCR with 500 V blocking capability and 12 A RMS current handling is required. The TO-220AB package provides adequate thermal dissipation for moderate power levels. Consider the 100 A surge rating for inrush protection requirements in motor or transformer loads.

Scrs Part Context

This device belongs to the BT151 series of Silicon Controlled Rectifiers. The series includes variants with different packages such as the surface-mountable BT151S and the insulated BT151X. All variants share similar electrical characteristics but differ in physical mounting and thermal management capabilities.

Scrs Replacement Considerations

Equivalent parts include BT151-500R from NXP and COMSET. Verify pinout compatibility and exact surge current ratings when substituting between manufacturers.