SLA4390

Overview

The SLA4390 is a PNP + NPN Darlington H-bridge module manufactured by Sanken Electric USA Inc. It integrates four complementary Darlington pairs within a single 12-pin SIP package with an integrated heatsink fin. The device supports continuous collector currents of ±5 A and peak currents up to ±8 A under pulsed conditions. Key electrical ratings include a collector-emitter voltage (VCEO) of ±100 V, a minimum DC current gain (hFE) of 2000 at ±3 A, and a maximum junction temperature of 150°C. Internal base resistors are specified as R1/R3 = 2.5kΩ/3kΩ and R2/R4 = 200Ω/100Ω.

Feature Summary

• Integrated H-bridge topology combining complementary NPN and PNP Darlington transistors for simplified circuit design
• High current handling capability with internal base resistors reducing external component count
• Robust thermal management through a metal fin structure designed for direct heatsinking

Applications

• Motor control systems requiring bidirectional drive
• Electromagnetic valve actuation circuits
• Industrial automation switching applications

Procurement Notes

Verify the specific revision status before procurement, as the datasheet explicitly marks this component as 'Not Recommended for New Designs'. Confirm that existing inventory or legacy stock meets the required reliability standards for your production timeline. Ensure the 12-pin SIP footprint matches the target PCB layout constraints.

Selection Notes

Select this component only for legacy replacements where the original design utilized this specific Sanken configuration. Evaluate the thermal resistance requirements carefully, as performance depends on the mounting surface and use of silicone grease. Consider alternative modern discrete solutions if new designs allow, given the obsolescence warning.

Part Context

This part belongs to Sanken's SLA series of power transistor modules, which were widely used in automotive and industrial applications during previous decades. The SLA4390 specifically addresses high-current switching needs using a monolithic integration approach common in older power electronics architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the 'Not Recommended for New Designs' status, engineers should evaluate equivalent discrete transistor arrangements or newer generation bridge drivers from other manufacturers.