SJ4025LATP

Overview

The Littelfuse SJ4025LATP is a Silicon-Controlled Rectifier (SCR) from the SJxx25xx series, designed for surface-mount applications in the TO-263AB-3 package. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (It RMS) of 12 A. The device operates within a temperature range of -40°C to +150°C and includes AEC-Q101 qualification for automotive reliability. Key electrical parameters include a gate trigger voltage (Vgt) of 1.5 V, ensuring sensitive gate control for efficient switching in power management circuits.

Feature Summary

• AEC-Q101 qualified for automotive-grade reliability and durability
• Surface-mount construction in a compact TO-263AB-3 package
• Sensitive gate design allowing direct interfacing with microprocessors
• High thermal stability supporting operation up to +150°C

Applications

• Ground fault circuit interrupter (GFCI) solenoid controls
• Capacitive-discharge ignition systems
• Fluid level sensors
• Strobe light triggering circuits

Procurement Notes

Verify the specific suffix 'LA' against official Littelfuse documentation to confirm exact binning or variant specifications, as standard datasheets may list base part numbers. Confirm lead times and factory packaging quantities directly with authorized distributors, as these details are subject to change and vary by region. Ensure compliance with RoHS and REACH requirements for your target market before finalizing orders.

Selection Notes

Select this component when a 400 V blocking voltage and 12 A continuous current rating are required in a surface-mount form factor. The TO-263AB-3 package offers improved thermal dissipation compared to smaller SMD options. Consider the AEC-Q101 qualification if the application demands automotive-grade robustness. Verify that the 1.5 V gate trigger voltage aligns with the driving circuit's output capabilities.

Part Context

This SCR belongs to the SJxx25xx series, which provides discrete silicon-controlled rectifiers optimized for precise switching in low-current circuits. The series emphasizes fast turn-off capabilities to reduce commutation failure risks. These devices are glass passivated for durability and are compatible with lead-free reflow soldering processes, fitting into modern automated assembly lines.

Replacement Considerations

Direct replacements must match the 400 V VDRM, 12 A It RMS, and TO-263AB-3 package dimensions. Check equivalent parts from other manufacturers for compatible gate trigger characteristics and thermal resistance values. Ensure any substitute also meets AEC-Q101 standards if automotive qualification is mandatory for the end application.