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Product Detailed Parameters
- Description：DIODE ZENER 12V 5W T18
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：12 V
- Tolerance：±2%
- Power - Max：5 W
- Impedance (Max) (Zzt)：2.5 Ohms
- Current - Reverse Leakage @ Vr：2 µA @ 8.6 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 Microchip Technology 1N5349C/TR8 is a silicon 5-watt Zener diode with a nominal voltage of 12 V and a ±2% tolerance. It operates within a temperature range of -65°C to +150°C, featuring a maximum reverse current of 125 µA at 7.5 V and a dynamic impedance of 2.5 Ω. The device utilizes an axial T-18 package and supports tape-and-reel packaging.
Feature Summary
- Provides stable voltage regulation across broad operating currents and temperatures
- Features flexible axial-lead mounting terminals for through-hole applications
- Withstands high surge stresses without sensitivity to electrostatic discharge
Applications
- Voltage regulation in power supply circuits
- Overvoltage protection for sensitive electronic components
- Reference voltage generation in measurement systems
Procurement Notes
Verify the specific suffix 'TR8' confirms tape-and-reel packaging compatibility with automated assembly equipment. Confirm that the component meets the required JEDEC registration standards and check for any RoHS compliance variations based on manufacturing origin. Ensure thermal management aligns with the specified junction-to-lead thermal resistance.
Selection Notes
Select this component when precise voltage regulation is required within a tight tolerance band. Consider the 5-watt power dissipation capability and the wide operating temperature range for harsh environments. Evaluate the axial lead configuration against available board space and mounting constraints.
Part Context
This part belongs to the 1N5333B through 1N5388B series of silicon Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers a wide selection of voltages from 3.3V to 200V with various tolerance options identified by suffix letters.
Replacement Considerations
Equivalent parts include other 5W Zener diodes with 12V nominal voltage and ±2% tolerance. Verify pinout compatibility and thermal characteristics before substitution.
FAQ
What does the 'C' suffix indicate?
The 'C' suffix indicates a voltage tolerance of ±2%.
How is the maximum regulator current determined?
It is calculated using the formula IZM = P/VZM, where P is the rated power and VZM is the voltage at the high end of the tolerance.
