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1N4929/TR
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Product Detailed Parameters
- Description：DIODE ZENER 19.2V 500MW DO204AH
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：19.2 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：36 Ohms
- Current - Reverse Leakage @ Vr：-
- Operating Temperature：-25°C ~ 100°C
- Mounting Type：Through Hole
- Package / Case：DO-204AH, DO-35, Axial
- Voltage - Forward (Vf) (Max) @ If：-
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Overview
The Microchip Technology 1N4929/TR is a temperature-compensated Zener reference diode with a nominal voltage of 19.2 V and ±5% tolerance. It features metallurgical bonding and double plug construction for low noise performance. The device operates in the DO-35 (DO-204AH) axial through-hole package, rated for a maximum power dissipation of 500 mW. It supports an operating temperature range from -65°C to +175°C and includes a maximum impedance of 36 Ohms.
Feature Summary
- Temperature compensated design ensures stable voltage reference across varying thermal conditions.
- Metallurgically bonded construction provides mechanical stability and reliability.
- Double plug construction minimizes electrical noise for precision applications.
Applications
- Precision voltage reference circuits
- Temperature compensated regulation systems
- Low noise analog signal processing
Procurement Notes
Verify the specific suffix TR indicates tape and reel packaging when ordering. Confirm the manufacturer is Microchip Technology, as this part number may appear under legacy brands like Actel or Micrel due to acquisitions. Ensure the DO-35 package matches your PCB footprint requirements. Check RoHS compliance status if required by your manufacturing standards.
Selection Notes
Select this component when a stable 19.2 V reference is needed with minimal temperature drift. The 500 mW power rating suits low-current reference applications. Consider the axial leaded package for through-hole assembly processes. Verify that the ±5% tolerance meets your circuit's accuracy requirements compared to tighter tolerance alternatives.
Part Context
This diode belongs to the family of temperature-compensated Zener references designed for high-stability applications. Unlike standard Zener diodes, it utilizes specific doping profiles to cancel out temperature coefficients. The 1N4929 variant specifically targets the 19.2 V nominal output, offering a balance between voltage level and compensation effectiveness.
Replacement Considerations
Check for direct equivalents from other manufacturers offering 19.2 V temp-compensated Zeners in DO-35 packages. Verify pinout compatibility and power ratings before substitution. Legacy parts from Actel or Micrel may be functionally identical but require verification of current production status.
