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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：±5%
- 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 1N5349BE3/TR8 is a silicon 5-watt Zener diode from the JEDEC registered 1N5333B-1N5388B series. It provides voltage regulation at a nominal Zener voltage of 12 V with a standard tolerance of ±5%. The device operates within an ambient temperature range of -65°C to +150°C and features a T-18 axial leaded plastic package. Electrical characteristics include a maximum dynamic impedance of 2.5 ohms, a maximum reverse current of 2.0 µA, and a maximum regulator current of 7.5 A.
Feature Summary
- Provides stable voltage regulation across a broad operating current and temperature range
- Withstands high surge stresses and exhibits minimal changes in voltage versus current
- Features flexible axial-lead mounting terminals for versatile installation
- Moisture classification is Level 1 per IPC/JEDEC J-STD-020B without requiring dry pack
Applications
- Voltage regulation in power supply circuits
- Overvoltage protection for sensitive electronic components
- Reference voltage generation in measurement systems
Procurement Notes
Verify the component manufacturer and lot traceability upon receipt. Confirm that the physical marking matches the part number and that the RoHS compliant e3 suffix is present as specified. Ensure the tape and reel packaging meets EIA-296 standards before integration into automated assembly processes.
Selection Notes
Select this component when a 5-watt power dissipation rating and a 12 V Zener voltage are required. The ±5% tolerance suits general-purpose applications where tight precision is not critical. Verify thermal management requirements based on the specific mounting method and ambient temperature conditions.
Part Context
This device belongs to the 1N5333B through 1N5388B series of silicon Zener diodes manufactured by Microsemi. The series offers a wide selection of voltages ranging from 3.3 V to 200 V. These components utilize a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards.
Replacement Considerations
Equivalent parts within the same series include 1N5349B and 1N5349BE3. Cross-vendor replacements must match the 5 W power rating, 12 V Zener voltage, T-18 package dimensions, and electrical tolerances.
