SLA4030

Overview

The SLA4030 is an NPN Darlington transistor manufactured by Sanken Electric. It features a collector-emitter voltage (VCEO) of 100 V and a continuous collector current (IC) rating of 4 A at 25°C ambient temperature. The device includes built-in base resistors: R1 is typically 3 kΩ and R2 is typically 500 Ω. Key electrical characteristics include a DC current gain (hFE) of 2000 at IC=2A, and a saturation voltage (VCE(sat)) of 1.5 V max at IC=2A with IB=10mA. The maximum junction temperature is 150°C, and the thermal resistance from junction to case is 5°C/W.

Feature Summary

• Integrated base resistors for simplified drive circuitry
• High current gain suitable for general-purpose switching
• Robust thermal performance with low junction-to-case resistance

Applications

• General purpose switching applications
• Relay driver circuits
• Motor control interfaces

Procurement Notes

Verify the specific package variant required, as the datasheet lists multiple SIP configurations including SLA12Pin, SLA8Pin, SLA51Pin, and SLA21Pin with fin options. Confirm that the ordering suffix matches the desired pin count and physical dimensions before finalizing procurement to ensure mechanical compatibility with the target PCB layout.

Selection Notes

Select this component when a high-gain NPN Darlington configuration is needed for driving loads up to 4 A. Ensure the base drive current is sufficient to achieve the specified saturation voltage, particularly at higher temperatures. Consider the thermal resistance and heatsinking requirements if operating near the maximum current or in elevated ambient conditions.

Part Context

This component belongs to the SLA series of NPN Darlington transistors produced by Sanken Electric. The series offers various pin counts and package styles to accommodate different power dissipation needs and board space constraints. The SLA4030 specifically provides a balance of moderate current handling and high gain for standard industrial and consumer electronics applications.

Replacement Considerations

Consult official cross-reference tools for equivalent parts. Verify that any substitute maintains the 100 V VCEO, 4 A IC rating, and integrated resistor values to ensure functional compatibility without redesigning the drive network.