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1N4449 BK
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Product Detailed Parameters
- Description：DIODE STANDARD 100V 150MA DO35
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Bulk
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：100 V
- Current - Average Rectified (Io)：150mA
- Voltage - Forward (Vf) (Max) @ If：730 mV @ 5 mA
- Speed：Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr)：4 ns
- Current - Reverse Leakage @ Vr：25 nA @ 20 V
- Capacitance @ Vr, F：2pF @ 0V, 1MHz
- Mounting Type：Through Hole
- Package / Case：DO-204AH, DO-35, Axial
- Supplier Device Package：DO-35
- Operating Temperature - Junction：-65°C ~ 200°C
- Grade：-
- Qualification：-
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Overview
The Central Semiconductor Corp 1N4449 BK is a silicon switching diode belonging to the discontinued 1N4448 Series. It features a single element configuration housed in an axial DO-35 glass package with tin-lead terminal plating. The device is rated for a maximum average forward current of 0.15 A and a maximum repetitive peak reverse voltage of 100 V. It exhibits a maximum non-repetitive peak forward surge current of 2 A and a low maximum reverse recovery time of 0.004 µs.
Feature Summary
- High reliability silicon construction designed for signal or computer diode applications
- Axial leaded glass encapsulation providing electrical isolation
- Fast switching characteristics suitable for high-speed circuitry
Applications
- Signal rectification in electronic circuits
- Computer diode logic applications
- General purpose switching tasks
Procurement Notes
This component has been officially transitioned to End of Life status by Central Semiconductor Corp. Last purchase orders must be placed within six months of the notice date, with final shipments occurring twelve months after notification. Verification of current availability is required as standard production has ceased.
Selection Notes
Designers should note that this part is discontinued and no longer actively manufactured. Selection requires confirmation of remaining stock levels or authorization for a life-time buy before the specified deadline. Alternative sourcing strategies must be evaluated immediately due to the cessation of production.
Part Context
The 1N4449 BK is part of the broader 1N4448 series of small-signal switching diodes. This series was widely utilized for its fast recovery times and robust performance in general-purpose electronics. Central Semiconductor maintains records for legacy support but has formally ended manufacturing for this specific item line.
Replacement Considerations
Official documentation identifies the 1N4148 BK as the designated replacement part number for the 1N4449 BK. Engineers should verify pinout compatibility and electrical specifications when transitioning to this substitute component.
