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1N4748A G
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Product Detailed Parameters
- Description：DIODE ZENER 22V 1W DO204AL
- Series：-
- Mfr：Microsemi Corporation
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：22 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：23 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 16.7 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 1N4748AG is a single silicon Zener diode rated for 1 W power dissipation. It provides a nominal Zener voltage of 22 V with a tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum dynamic impedance of 23 Ohms at a test current of 11.5 mA. It utilizes a DO-204AL (DO-41) axial through-hole package.
Feature Summary
- Hermetically sealed glass encapsulation providing environmental protection
- High thermal resistance capability suitable for demanding applications
- Unidirectional voltage regulation functionality
Applications
- Voltage regulation in high-reliability electronic circuits
- Overvoltage protection systems
- Reference voltage generation in precision instrumentation
Procurement Notes
Verify the specific suffix 'G' indicates hermetic sealing when sourcing from distributors. Confirm RoHS compliance status as historical data suggests non-compliance for this variant. Ensure the supplier provides official Microchip or Microsemi documentation to validate the part number authenticity and manufacturing origin before procurement.
Selection Notes
Select this component when hermetic sealing and extended temperature operation are required. The DO-41 package supports through-hole mounting. Consider tighter tolerance variants if the standard 5% deviation exceeds circuit requirements. Verify lead length specifications against board layout constraints.
Part Context
This part belongs to the 1N47xx series of 1 Watt Zener diodes manufactured by Microsemi, now part of Microchip Technology. The 'G' suffix specifically denotes a glass body construction that offers hermetic sealing and higher temperature ratings compared to plastic encapsulated alternatives within the same series.
Replacement Considerations
Equivalent parts include 1N4748A and 1N4748AG from other manufacturers such as Central Semiconductor or Taiwan Semiconductor. Verify pinout compatibility and ensure replacement devices meet the same hermetic sealing and temperature rating specifications.
