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1N4257/TR
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Product Detailed Parameters
- Description：DIODE STD 3000V 250MA S AXIAL
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：3000 V
- Current - Average Rectified (Io)：250mA
- Voltage - Forward (Vf) (Max) @ If：3.5 V @ 100 mA
- Speed：Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：1 µA @ 3000 V
- Capacitance @ Vr, F：-
- Mounting Type：Through Hole
- Package / Case：S, Axial
- Supplier Device Package：S, Axial
- Operating Temperature - Junction：-65°C ~ 175°C
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Overview
The Microchip Technology 1N4257/TR is a high voltage standard recovery rectifier diode designed for demanding environments. It features a working peak reverse voltage of 10,000 V and an average rectified forward current rating of 0.25 A at 55 °C. The device utilizes a hermetically sealed voidless hard glass package with tungsten slugs to ensure absolute high voltage and temperature stability. It operates within a junction and storage temperature range of -65 °C to +175 °C.
Feature Summary
- Hermetically sealed voidless hard glass construction with tungsten slugs
- Triple-layer passivation for lowest reverse leakage
- Inherently radiation hard design
- High forward surge current capability
Applications
- High voltage bridges and half-bridges
- X-ray machines and radar equipment
- Voltage multipliers and catch diodes
- Transmitters and power supplies
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm compliance status. The '/TR' designation indicates tape and reel packaging per EIA-296 standards. Confirm that the requested quantity meets factory consultation requirements for this packaging option. Ensure the component version matches the required commercial or military qualification levels.
Selection Notes
Select this component for applications requiring extreme reverse voltage endurance up to 10,000 V. The S-package provides low thermal resistance suitable for high-reliability systems. Consider the 0.25 A current rating at 55 °C for steady-state operation. Verify compatibility with existing lead lengths and soldering temperatures not exceeding 260 °C.
Part Context
This part belongs to the 1N4254 through 1N4257 series of high voltage rectifiers. These devices are JEDEC registered and share similar electrical characteristics within the family. They are distinct from the 1N3644–1N3647 variants which offer additional JAN and JANTX military qualifications. The series is engineered for critical failure-intolerant scenarios.
Replacement Considerations
Direct substitutes include other parts within the 1N4254–1N4257 series with matching voltage ratings. Cross-reference 1N3644–1N3647 equivalents if military qualification is required. Verify that alternative components maintain the same hermetic sealing and radiation hardness specifications.
