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Product Detailed Parameters
- Description：DIODE ZENER 12V 5W T18
- Series：-
- Mfr：Microsemi Corporation
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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 Microsemi Corporation 1N5349BE3 is a silicon 5-watt Zener diode with a nominal voltage of 12 V and ±5% tolerance. It operates within a temperature range of -65°C to +150°C, features a maximum dynamic impedance of 2.5 Ω at a test current of 100 mA, and has a maximum reverse leakage current of 2 µA at 8.6 V.
Feature Summary
- Provides stable voltage regulation across a broad operating current and temperature range
- Features flexible axial-lead mounting terminals for versatile installation
- Withstands high surge stresses without damage
- Moisture classification Level 1 requiring no dry pack storage
Applications
- Voltage regulation in power supply circuits
- Overvoltage protection for sensitive electronic components
- Reference voltage generation in measurement systems
Procurement Notes
Verify the RoHS compliant e3 suffix matches project requirements. Confirm the B suffix indicates the standard ±5% voltage tolerance. Ensure the T-18 axial lead package fits the designated PCB footprint. Check for any specific military screening prefixes if environmental reliability is required.
Selection Notes
Select this component when a 5-watt power rating and 12-volt regulation are necessary. The wide operating temperature range supports harsh environments. Verify that the thermal resistance allows adequate heat sinking for steady-state operation. Consider surface mount equivalents like SMBJ5349B if space constraints apply.
Part Context
This device belongs to the JEDEC registered 1N5333B through 1N5388B series of 5.0-watt Zener diodes. The series covers voltages from 3.3V to 200V. The e3 suffix denotes RoHS compliance with annealed matte-tin plating on the terminals.
Replacement Considerations
SMBJ5349B or SMBG5349B serve as surface mount equivalents. Other manufacturers offer direct replacements within the 1N5349B specification.
FAQ
What does the e3 suffix indicate?
The e3 suffix indicates that the device is RoHS compliant and utilizes annealed matte-tin terminal plating.
How is polarity identified?
Polarity is indicated by a band on the plastic body; the banded end represents the cathode.
