SMA6511

Overview

The SMA6511 is a PNP and NPN Darlington transistor array housed in a 21-pin SIP package with fins. It integrates multiple driver stages featuring internal base resistors (R1: 4kΩ, R2: 150Ω, R3: 4kΩ, R4: 100Ω typ). The NPN section supports a collector current of 1.5A with a VCEO of 85V to 115V. The PNP section handles up to 3A with a VCEO of -60V. Maximum junction temperature is 150°C. DC current gain (hFE) is typically 2000 at 1A. Saturation voltage is 1.5V max at 1A. Thermal resistance is 4°C/W with an infinite heatsink.

Feature Summary

• Integrated dual supply voltage switching capability for stepper motor drivers
• Built-in base resistors simplify drive circuit design
• High current gain reduces required input drive current

Applications

• Stepper motor drivers
• Dual supply voltage switching circuits
• Power control interfaces

Procurement Notes

Verify component authenticity through authorized Sanken Electric distributors. Confirm datasheet revision status as the device is marked Not Recommended for New Designs. Check RoHS compliance and packaging specifications against project requirements before ordering.

Selection Notes

Select this component for applications requiring high current gain and integrated drive resistors. Ensure thermal management meets the 4°C/W requirement with an infinite heatsink. Verify that the 1.5A NPN and 3A PNP ratings align with load demands. Consider end-of-life status for long-term production planning.

Part Context

The SMA6511 belongs to Sanken's discrete power transistor lineup designed for industrial motor control. It replaces older discrete Darlington configurations by integrating multiple transistors and resistors into a single SIP package. This consolidation reduces board space and simplifies assembly for stepper motor driver modules.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.