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1N4774A
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Product Detailed Parameters
- Description：DIODE ZENER 9.1V 500MW DO204AH
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：9.1 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：200 Ohms
- Current - Reverse Leakage @ Vr：-
- Operating Temperature：-55°C ~ 100°C
- Mounting Type：Through Hole
- Package / Case：DO-204AH, DO-35, Axial
- Voltage - Forward (Vf) (Max) @ If：-
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N4774A is a temperature-compensated Zener reference diode with a nominal voltage of 9.1 V and a tolerance of ±5%. It operates in the low current range of 0.5 mA to 1.0 mA, featuring a maximum power dissipation of 250 mW and a maximum impedance of 0.007 V. The device utilizes a DO-204AH (DO-35) through-hole package and offers temperature coefficients as low as those found in the Zero-TC Reference Diode series.
Feature Summary
- Temperature compensated design for stable reference performance
- Low-level operation optimized for precision applications
- Metallurgically bonded construction for reliability
Applications
- Precision voltage reference circuits
- Temperature compensation networks
- Low noise analog signal conditioning
Procurement Notes
Verify the specific manufacturer source, as the 1N4774A designation is utilized by multiple vendors including Microchip, Microsemi, and Digitron. Confirm that the datasheet matches the required electrical specifications, particularly the power rating and impedance values, before procurement. Ensure the package type corresponds to the intended PCB footprint.
Selection Notes
Select this component when a stable 9.1 V reference is required at very low currents. The temperature compensation feature makes it suitable for environments where voltage drift must be minimized. Compare the specific power dissipation limits and impedance characteristics against other available manufacturers to ensure compatibility with the circuit design constraints.
Part Context
This part belongs to the broader family of 1N47xx series Zener diodes, specifically the temperature-compensated variants. These devices are engineered to provide a stable voltage reference over a wide temperature range, distinguishing them from standard Zener diodes which may exhibit higher thermal drift.
Replacement Considerations
Direct substitutes include parts from the same series such as the 1N4765 through 1N4774A series from Microsemi. Verify pinout compatibility and electrical equivalence before substitution.
