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Product Detailed Parameters
- Description：DIODE ZENER 68V 5W T18
- Series：-
- Mfr：Microsemi Corporation
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：68 V
- Tolerance：±5%
- Power - Max：5 W
- Impedance (Max) (Zzt)：44 Ohms
- Current - Reverse Leakage @ Vr：500 nA @ 49 V
- Operating Temperature：-65°C ~ 150°C
- Mounting Type：Through Hole
- Package / Case：T-18, Axial
- Voltage - Forward (Vf) (Max) @ If：1.2 V @ 1 A
- Grade：-
- Qualification：-
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Overview
The Microsemi Corporation 1N5373B is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 68V with a tolerance of 5%. The device is rated for a maximum power dissipation of 5W and utilizes a unidirectional configuration. It is housed in a plastic T-18 axial leaded package with two pins, conforming to the MIL-19500 reference standard.
Feature Summary
- Provides stable voltage regulation within the 3.3V to 200V range characteristic of the series
- Utilizes a low thermal resistance design suitable for high DC current operation with adequate heat sinking
- Features moisture classification Level 1 requiring no dry pack storage
Applications
- Voltage regulation circuits
- Overvoltage protection for power inputs
- High reliability military or aerospace screening levels
Procurement Notes
Verify the specific suffix letter on the part number to confirm the exact voltage tolerance, as the B suffix indicates 5% tolerance. Ensure the procurement matches the JEDEC registered 1N5373 designation rather than generic equivalents. Confirm RoHS compliance status if required by the application, noting that non-compliant versions exist within this product line.
Selection Notes
Select this component when a precise 68V regulation point is required at 5W power dissipation. The T-18 through-hole package is appropriate for general-purpose circuit boards where surface mount options are not feasible. Consider the dynamic impedance characteristics typical of the series when designing for sensitive load regulation requirements.
Part Context
This component belongs to the Microsemi 1N5333B through 1N5388B series of axial-leaded Zener diodes. The series offers a wide selection of voltages from 3.3V to 200V. These devices are JEDEC registered and provide various tolerance options identified by specific suffix letters on the part number.
Replacement Considerations
Equivalent parts include other manufacturers' 1N5373B variants meeting the same 68V, 5W, and T-18 package specifications. Verify pinout compatibility and thermal resistance ratings before substitution.
