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Product Detailed Parameters
- Description：DIODE ZENER 75V 5W T18
- Series：-
- Mfr：Microsemi Corporation
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：75 V
- Tolerance：±5%
- Power - Max：5 W
- Impedance (Max) (Zzt)：45 Ohms
- Current - Reverse Leakage @ Vr：500 nA @ 54 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 1N5374B/TR8 is a silicon axial-leaded Zener diode with a nominal voltage of 75 V and a power dissipation rating of 5.0 W at 25 °C. It features a ±5% voltage tolerance, a maximum reverse leakage current of 0.5 µA, and a dynamic impedance of 45 Ω. The device operates within a temperature range of -65 °C to +150 °C and utilizes a T-18 plastic encapsulated package.
Feature Summary
- Provides stable voltage regulation across a broad operating current and temperature range
- Withstands high surge stresses and exhibits minimal voltage change versus current
- Features flexible axial-lead mounting terminals for through-hole integration
Applications
- Voltage regulation circuits requiring 75 V reference
- Overvoltage protection in industrial equipment
- Power supply input transient suppression
Procurement Notes
Verify the specific suffix 'TR8' indicates tape and reel packaging per EIA-296 standards. Confirm RoHS compliance status as standard B-suffix devices may not be compliant unless marked e3. Ensure adequate heat sinking is provided to maintain the 5 W power rating during operation.
Selection Notes
Select this component when a 75 V Zener voltage with tight ±5% tolerance is required. Consider the 45 Ω dynamic impedance for low-current applications. Verify thermal management capabilities are sufficient for the intended ambient temperature and mounting configuration.
Part Context
This part belongs to the JEDEC registered 1N5333B through 1N5388B series of 5.0 watt Zener diodes. The series covers a voltage selection from 3.3 V to 200 V. The 'B' suffix specifically denotes a standard voltage tolerance of plus or minus 5%.
Replacement Considerations
Equivalent parts include the 1N5374B without the TR8 suffix for bulk packaging. Surface mount equivalents such as SMBJ5374B or SMBG5374B are available for PCB space constraints.
FAQ
What does the 'TR8' suffix indicate?
The 'TR' suffix indicates the device is supplied in tape and reel packaging per EIA-296 standards.
How is polarity identified on the device?
Polarity is indicated by a band on the cathode end of the diode body.
