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1N4964US/TR
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Product Detailed Parameters
- Description：DIODE ZENER 18V 5W D5B
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：18 V
- Tolerance：±5%
- Power - Max：5 W
- Impedance (Max) (Zzt)：4 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 13.7 V
- Operating Temperature：-65°C ~ 175°C
- Mounting Type：Surface Mount
- Package / Case：SQ-MELF, E
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 1 A
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Overview
The 1N4964US/TR is a single Zener diode manufactured by Microchip Technology, designed for surface-mount applications in the D-5B-2 package. It features an 18 V nominal Zener voltage with a 5% tolerance and operates at a test current of 65 mA. The device handles a maximum power dissipation of 5 W and exhibits a low reverse leakage current of 5 uA. Its Zener impedance is specified at 4 Ohms, with a positive temperature coefficient of 0.085 %/C. The component supports a wide operating temperature range from -65 C to +175 C and includes a forward current rating of 1 A.
Feature Summary
- Provides stable voltage regulation through precise Zener breakdown characteristics suitable for reference applications.
- Engineered for high thermal endurance with extended operational limits up to 175 C.
- Utilizes a compact surface-mount form factor to facilitate automated assembly processes.
Applications
- Voltage reference circuits requiring stable DC levels
- Overvoltage protection stages in sensitive electronics
- Clamping applications within power supply architectures
Procurement Notes
Verify the specific suffix configuration against official Microchip documentation to ensure compatibility with required packaging formats. Confirm that the D-5B-2 package dimensions align with target PCB footprints. Validate RoHS compliance status as indicated in the manufacturer's latest release notes before finalizing procurement specifications.
Selection Notes
Select this component when a robust 5 W surface-mount Zener diode is required for high-reliability environments. Ensure the circuit design accommodates the specified 65 mA test current for optimal regulation accuracy. Consider the positive temperature coefficient for thermal stability analysis in varying ambient conditions.
Part Context
This part belongs to the standard 1N4964 series of Zener diodes produced by Microchip Technology. It represents a transition from traditional through-hole variants to surface-mount implementations while maintaining equivalent electrical performance parameters. The US suffix typically denotes specific tape-and-reel packaging configurations for industrial manufacturing.
Replacement Considerations
Cross-reference with JAN1N4964 or JANTX1N4964DUS/TR for military-grade equivalents. Verify pinout compatibility and package dimensional tolerances before substituting with generic industry alternatives.
