BD235-BP

Overview

The BD235-BP is an NPN silicon power transistor manufactured by Micro Commercial Components (MCC). It utilizes planar technology with a base island layout to achieve high gain and low saturation voltage. The device is designed for medium-power linear and switching applications, serving as the complementary counterpart to the PNP BD236 and BD238 transistors. It is housed in a TO-126 plastic encapsulated package suitable for through-hole mounting.

Feature Summary

• High current gain performance combined with very low saturation voltage
• Manufactured using planar technology with a specialized base island layout
• Designed as the complementary NPN pair for BD236 and BD238 PNP transistors

Applications

• Medium power linear amplifier circuits
• General purpose switching applications
• Complementary push-pull output stages

Procurement Notes

Verify the specific manufacturer source, as the BD235 designation is produced by multiple vendors including STMicroelectronics and Fairchild. Confirm that the MCC variant matches required electrical tolerances and thermal characteristics. Check for obsolete status or lifecycle restrictions before finalizing design integration.

Selection Notes

Select this component when a complementary NPN transistor is needed to pair with BD236 or BD238 devices. Ensure the application requires the specific gain and saturation voltage profile provided by the planar base island construction. Verify that the TO-126 package dimensions fit the available board space and thermal management requirements.

Part Context

The BD235 belongs to a family of complementary silicon power transistors widely used in audio and industrial electronics. While originally associated with Fairchild Semiconductor, Micro Commercial Components produces the BD235-BP variant. This part completes the standard NPN-PNP pairs used in balanced amplifier designs.

Replacement Considerations

Direct functional substitutes include the BD234 (complementary PNP), BD236, and BD238. Other compatible NPN power transistors from different manufacturers may be used if pinouts and electrical ratings align.