1N4448 TR

Overview

The Central Semiconductor Corp 1N4448 TR is a silicon switching diode belonging to the 1N4448 series. It is housed in a DO-35 glass axial leaded package designed for through-hole mounting. The device features a peak repetitive reverse voltage of 100 V and a maximum average forward rectified current of 250 mA. Electrical characteristics include a maximum reverse leakage current of 25 nA at rated voltage, a forward voltage drop of 1.0 V at specified current, and a fast recovery time of 4 ns. The component supports a maximum surge current of 4 A and operates within a junction temperature range of -65°C to +175°C.

Feature Summary

• Fast switching capability with a 4 ns recovery time suitable for high-speed digital applications
• Hermetically sealed glass construction providing corrosion resistance and environmental stability
• High thermal performance allowing operation up to a 175°C junction temperature

Applications

• General purpose signal switching circuits
• Clamping and protection stages in electronic systems
• High-speed logic interface isolation

Procurement Notes

This component has been officially transitioned to End of Life status by Central Semiconductor Corp. Procurement is restricted to existing inventory or final time buys. Orders must be placed within six months of the notice date, with final shipments occurring within twelve months. Verify availability directly with the manufacturer or authorized distributors as standard supply chains are discontinued.

Selection Notes

Select this part only if legacy compatibility with the 1N4448 specification is required for existing designs. Note that the TR suffix indicates tape and reel packaging, which differs from bulk options. Due to the EOL status, alternative sourcing strategies or redesigns using the recommended replacement parts should be evaluated for new projects.

Part Context

The 1N4448 series represents a line of general-purpose silicon switching diodes manufactured by Central Semiconductor Corp. These devices utilize planar technology within a DO-35 package to ensure reliability. The series is widely recognized in industrial and consumer electronics for its balance of speed and voltage handling capabilities in discrete semiconductor applications.

Replacement Considerations

Central Semiconductor lists the 1N4148 TR as the official replacement for the 1N4448 TR. Designers should verify pinout compatibility and electrical parameter alignment before substituting the components in existing assemblies.

FAQ

What is the current production status of the 1N4448 TR?

The 1N4448 TR is classified as End of Life (EOL) by Central Semiconductor Corp.

Which component is designated as the replacement for this part?

The 1N4148 TR is listed as the replacement product for the 1N4448 TR.