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1N4954US/TR
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Product Detailed Parameters
- Description：DIODE ZENER 6.8V 5W D5B
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：6.8 V
- Tolerance：±5%
- Power - Max：5 W
- Impedance (Max) (Zzt)：1 Ohms
- Current - Reverse Leakage @ Vr：150 µA @ 5.2 V
- Operating Temperature：-65°C ~ 175°C
- Mounting Type：Surface Mount
- Package / Case：SQ-MELF, E
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 1 A
- Grade：-
- Qualification：-
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Overview
The 1N4954US/TR is a Zener diode manufactured by Microchip Technology, designed for surface-mount applications. It features a nominal Zener voltage of 6.8V with a test current of 175mA and a maximum reverse leakage current of 40A. The device utilizes the D-5B-2 package, measuring 5.72mm in length, 3.76mm in width, and 3.76mm in height. It operates within a temperature range of -65°C to +175°C and has a power dissipation rating of 5W. The unit weight is 539mg, and it is supplied in reel packaging.
Feature Summary
- Provides stable voltage regulation at a nominal 6.8V potential
- Engineered for high-temperature operation up to 175°C
- Utilizes a compact surface-mount D-5B-2 package design
Applications
- Voltage regulation circuits requiring surface-mount integration
- High-temperature electronic systems operating up to 175°C
- Power supply protection using 5W dissipation capability
Procurement Notes
Verify the specific manufacturer part number JANTXV1N4954US/TR or similar variants when sourcing, as standard commercial versions may differ in qualification. Confirm availability status directly with authorized distributors, as stock levels fluctuate. Ensure the D-5B-2 package dimensions align with PCB footprint requirements before finalizing procurement orders.
Selection Notes
Select this component for designs requiring a 6.8V Zener reference in a surface-mount form factor. The 5W power rating supports moderate current handling, while the extended temperature range suits harsh environments. Compare against through-hole alternatives if board space permits, but prioritize this SMT version for automated assembly processes and space-constrained layouts.
Part Context
This component belongs to the 1N49xx series of Zener diodes produced by Microchip Technology. It shares functional similarities with other devices in the lineup, such as the 1N4964US/TR and 1N4957US/TR, which offer different voltage ratings but comparable package styles. The series is characterized by robust construction suitable for industrial and military-grade applications.
Replacement Considerations
Public confirmed substitute part numbers include JAN1N4954 and JANTXV1N4954US/TR. Verify pinout compatibility and electrical tolerances before substitution.
