2SC4138

Single Bipolar Transistors Overview

The Sanken Electric 2SC4138 is a silicon NPN triple diffused planar transistor designed for high voltage and high-speed switching applications. It features a collector-emitter breakdown voltage of 400 V minimum and a continuous collector current rating of 4 A, with a pulse capability of 10 A. The device supports a maximum power dissipation of 80 W at 25°C case temperature and operates within a junction temperature range of -55°C to +150°C. Key electrical characteristics include a typical transition frequency (fT) of 10 MHz and a low collector-base capacitance of 85 pF.

Single Bipolar Transistors Feature Summary

• Triple diffused planar construction ensures high reliability and robust performance under demanding conditions.
• Optimized for high-speed switching operations with minimized storage time and fast turn-off characteristics.
• High breakdown voltage capability suitable for primary-side regulation in switching power supplies.

Single Bipolar Transistors Applications

• Switching regulators
• General purpose amplification

Single Bipolar Transistors Procurement Notes

Verify the specific manufacturer source when sourcing this component, as multiple entities may list the part number. Confirm that the package matches the MT-100 (TO-3P) specification. Note that the datasheet explicitly states this component is not recommended for new designs; ensure compliance with project lifecycle requirements before procurement.

Single Bipolar Transistors Selection Notes

Select this transistor for circuits requiring high voltage isolation and moderate speed switching. Ensure the thermal management design accommodates the 80 W dissipation limit at 25°C case temperature. Verify that the base drive current can support the required collector current without exceeding saturation limits. Consider the package mounting style for heat sink integration.

Single Bipolar Transistors Part Context

This component belongs to the family of silicon NPN power transistors manufactured by Sanken Electric. It utilizes a triple diffused planar process to achieve high voltage tolerance and switching speed. The device is housed in an MT-100 (TO-3P) package, which provides a metal flange for effective heat dissipation to a heatsink.

Single Bipolar Transistors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Sanken Electric resources for equivalent or successor components if this part is obsolete.

Single Bipolar Transistors FAQ

What is the maximum collector-emitter voltage?

The maximum collector-emitter voltage (VCEO) is rated at 400 V.

Is this component suitable for new designs?

No, the datasheet explicitly states that the 2SC4138 is not recommended for new designs.

What is the package type?

The component uses the MT-100 package, which corresponds to the TO-3P form factor.