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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：±20%
- 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 1N5349E3/TR13 is a silicon 5.0-watt Zener diode in the JEDEC registered 1N5333-5388B series, manufactured by Microsemi Scottsdale Division. It provides voltage regulation at a nominal Zener voltage of 12V with a ±5% tolerance (B suffix). The device operates within a temperature range of -65°C to +150°C and features an axial lead T-18 package. Electrical characteristics include a maximum dynamic impedance of 2.5 Ohms, a reverse current of 2.0 µA, and a maximum regulator current of 9.1 A.
Feature Summary
- Provides stable voltage regulation across a broad operating current and temperature range
- Withstands high surge stresses and offers minimal changes in voltage versus current
- Features flexible axial-lead mounting terminals for standard through-hole integration
Applications
- Voltage regulation circuits requiring 5W power dissipation
- Power supply protection against transient overvoltages
- Reference voltage generation in electronic systems
Procurement Notes
Verify the component origin as the datasheet identifies Microsemi Scottsdale Division as the manufacturer. Confirm RoHS compliance via the e3 suffix and tape & reel packaging specifications indicated by the TR13 suffix. Ensure the B suffix corresponds to the required ±5% voltage tolerance for your specific design requirements.
Selection Notes
Select this component when a 12V Zener reference with 5W power handling is required. Consider the thermal resistance of 25°C/W junction-to-lead for heat sinking needs. Verify that the axial T-18 package fits the PCB layout constraints compared to surface mount equivalents like SMBJ5349B.
Part Context
This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes. The series covers a wide voltage selection from 3.3V to 200V. The 1N5349E3 variant specifically targets the 12V regulation segment within this extensive lineup of plastic encapsulated, moisture classification Level 1 devices.
Replacement Considerations
Surface mount equivalents are available as SMBJ5349B or SMBG5349B. For military screening levels, prefixes such as MQ, MX, or MV can be added to the base part number.
