SJ6040LATP

Overview

The Littelfuse SJ6040LATP is a standard recovery Silicon Controlled Rectifier (SCR) rated for 600 V repetitive off-state voltage and 40 A RMS on-state current. It features a maximum average on-state current of 25 A and a non-repetitive surge current capability of up to 520 A at 60 Hz. The device operates within a junction temperature range of -40°C to +150°C, with a maximum gate trigger voltage of 1.5 V and current of 15 mA. Packaged in TO-220AB through-hole format, it exhibits a maximum on-state voltage of 1.7 V and leakage current of 10 µA.

Feature Summary

• High thermal stability supporting operation up to 150°C junction temperature
• Robust surge handling capability reaching 520 A during half-cycle events
• Low power dissipation design optimized for efficient thermal management
• Electrical insulation certified under UL 1557 standards

Applications

• Industrial motor control systems requiring high surge tolerance
• Power supply circuits utilizing standard SCR topologies
• General purpose switching applications in harsh thermal environments

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer's part number against official Littelfuse documentation. Confirm that the specific suffix matches the required electrical characteristics and package type. Ensure compliance with RoHS3 and halogen-free specifications as stated in the datasheet. Validate that the device meets AEC-Q101 qualification requirements if automotive or high-reliability standards are necessary for the intended application.

Selection Notes

Select this component when a standard recovery SCR is required for 600 V applications with significant transient current demands. The 40 A RMS rating supports continuous loads, while the 520 A surge capacity handles inrush currents effectively. Consider the TO-220AB package for straightforward through-hole mounting and heat sinking. Evaluate the 150°C operating limit against ambient conditions to ensure adequate thermal headroom without excessive heatsinking.

Part Context

This device belongs to the SJxx40xx series of low-power SCRs from Littelfuse. The series offers voltage capabilities up to 600 V and is designed for general-purpose industrial use. The SJ6040LATP variant specifically provides standard recovery characteristics suitable for AC phase control and rectification tasks where moderate speed and high reliability are prioritized over fast-switching performance.

Replacement Considerations

Direct substitutes include the SJ6040R2TP and QJ6040JH7TP, which share similar 600 V ratings and 40 A current capacities. Verify pinout compatibility and exact thermal resistance values before substitution. Note that package variations may exist between these alternatives.