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1N5518BUR-1/TR
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Product Detailed Parameters
- Description：DIODE ZENER 3.3V 500MW DO213AA
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：3.3 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：26 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 1 V
- Operating Temperature：-65°C ~ 175°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：DO-213AA
- Voltage - Forward (Vf) (Max) @ If：1.1 V @ 200 mA
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N5518BUR-1/TR is a low voltage surface mount Zener diode rated at 0.5 watts (500 mW). It provides a nominal Zener voltage of 3.3 V with a standard tolerance of ±5%, indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +175°C and utilizes a DO-213AA (MELF) glass package. Key electrical parameters include a maximum reverse leakage current of 5 µA, a Zener impedance of 26 Ohms, and a test current of 20 mA.
Feature Summary
- Features an internal metallurgical bond construction for enhanced reliability in harsh environments.
- Qualified under MIL-PRF-19500/437 standards for military applications.
- Provides stable voltage regulation across a broad operating current and temperature range.
Applications
- Voltage regulation in military-grade electronic circuits.
- Surge protection in aerospace systems.
- Reference voltage sources in high-reliability industrial equipment.
Procurement Notes
Verify that the specific part number includes the correct suffixes for your required qualification level and packaging format. Confirm that the manufacturer documentation explicitly supports the intended environmental ratings. Ensure compatibility with existing board layouts regarding the MELF package dimensions. Cross-reference the datasheet for any recent product change notices affecting assembly or sourcing.
Selection Notes
Select this component when a robust, surface-mount Zener diode is required for low-voltage regulation. The internal metallurgical bond distinguishes it from non-bonded equivalents. Consider the ±5% tolerance if tighter precision is not critical. Verify that the 500 mW power dissipation rating meets the thermal requirements of the target application environment.
Part Context
This device belongs to the 1N5518BUR-1 through 1N5546BUR-1 series of low voltage avalanche diodes. It serves as the surface mount equivalent to the JEDEC registered axial 1N5518 series. The series offers various voltage options from 3.3 V to 33 V with different tolerance suffixes available.
Replacement Considerations
Publicly confirmed substitute part numbers are not provided in the source material. Equivalent axial leaded versions exist within the same family but require different mounting considerations.
