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1N4739 G
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Product Detailed Parameters
- Description：DIODE ZENER 9.1V 1W DO204AL
- Series：-
- Mfr：Microsemi Corporation
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：9.1 V
- Tolerance：±10%
- Power - Max：1 W
- Impedance (Max) (Zzt)：5 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 7 V
- Operating Temperature：-65°C ~ 175°C
- Mounting Type：Through Hole
- Package / Case：DO-204AL, DO-41, Axial
- Voltage - Forward (Vf) (Max) @ If：1.2 V @ 200 mA
- Grade：-
- Qualification：-
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Overview
The Microsemi Corporation 1N4739 G is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 9.1 V with a tight tolerance of 5%. The device operates in the DO-204AL package, commonly known as DO-41, and dissipates up to 1 W of power. Key electrical parameters include a maximum reverse leakage current of 10 uA, a Zener impedance of 5 Ohms, and a test current of 28 mA. It supports an operating temperature range from -65 C to +175 C.
Feature Summary
- Hermetically sealed glass encapsulation providing environmental protection
- High thermal stability suitable for elevated temperature environments
- Low dynamic impedance for stable voltage regulation
Applications
- Voltage reference circuits
- Overvoltage protection systems
- Power supply regulation
Procurement Notes
Verify the specific suffix 'G' indicates hermetic sealing and high-temperature rating compared to standard plastic variants. Confirm RoHS compliance status if required by assembly specifications. Ensure the manufacturer source is Microsemi or authorized distributor to guarantee authenticity and traceability of the glass-sealed component.
Selection Notes
Select this variant when hermetic sealing is mandatory for reliability in harsh environments. The 5% tolerance offers precision better than standard 10% options. Consider the DO-41 through-hole form factor for manual assembly or standard PCB layouts requiring axial leaded components with high thermal endurance.
Part Context
This component belongs to the 1N47 series of 1-watt Zener diodes manufactured by Microsemi. The 'G' suffix specifically denotes a glass-body construction that provides hermetic sealing capabilities, distinguishing it from plastic-bodied equivalents. This series is widely used in industrial and military-grade electronics where long-term stability and resistance to moisture are critical requirements.
Replacement Considerations
Equivalent parts include 1N4739AG (Microchip) and 1N4739A (onsemi). Verify package compatibility and ensure replacement devices meet the same hermetic sealing requirements if the original application demands it.
