2N4988

Overview

The 2N4988 is a silicon unilateral switch (SUS) manufactured by Harris Corporation. It functions as a four-layer semiconductor device designed for triggering and switching applications. The component operates within a specific voltage and current range, utilizing a standard through-hole package configuration suitable for general-purpose electronic circuits requiring reliable latching or thyristor-like behavior.

Feature Summary

• Four-layer silicon construction providing stable switching characteristics
• Designed for use as a trigger device in control circuits
• Capable of maintaining state after initial activation

Applications

• Triggering circuits for power control systems
• General-purpose switching applications
• Electronic timing and pulse generation circuits

Procurement Notes

Verify the manufacturer origin carefully, as Harris Corporation's discrete semiconductor assets were acquired by other entities. Confirm the specific datasheet version matches the production batch requirements. Ensure the package type aligns with the target PCB footprint. Check for any obsolescence notices or lifecycle status updates from the current rights holder before finalizing procurement plans.

Selection Notes

Select this component when a simple, robust unilateral switch is required without complex gate drive needs. Compare its holding current and breakover voltage against circuit requirements to ensure proper latching. Consider thermal management if operating near maximum ratings. Verify that the package style meets the assembly constraints of the final design.

Part Context

The 2N4988 belongs to the family of silicon unilateral switches, often compared to SCRs but with distinct triggering characteristics. Harris Corporation was a notable producer of such discrete semiconductors before industry consolidation. These devices are typically used where simple latching action is sufficient, distinguishing them from more complex programmable logic controllers or advanced thyristors.