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Product Detailed Parameters
- Description：DIODE ZENER 24V 1W DO204AL
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：24 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：25 Ohms
- Current - Reverse Leakage @ Vr：10 µA @ 18.2 V
- Operating Temperature：-55°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 Microchip Technology 1N3029B-1/TR is a 1-watt glass case Zener diode qualified per MIL-PRF-19500/115. It features a hermetically sealed DO-41 package with tungsten slugs and metallurgically bonded construction. The nominal Zener voltage is 24 V at a test current of 10.5 mA, with a maximum dynamic impedance of 25 ohms. It operates within a junction temperature range of -55°C to +175°C and exhibits a maximum reverse leakage current of 10 µA.
Feature Summary
- Hermetically sealed voidless hard glass package with tungsten slugs for high-reliability applications.
- Metallurgically bonded double plug construction ensuring structural integrity.
- Qualified under JAN, JANTX, and JANTXV military standards per MIL-PRF-19500/115.
- Inherently radiation hard as described in Microsemi MicroNote 050.
Applications
- Voltage regulation over broad operating current and temperature ranges.
- High-reliability electronic systems requiring hermetic sealing.
- Radiation-hardened circuit designs.
Procurement Notes
Verify the specific reliability level (JAN, JANTX, or JANTXV) required for the application, as the base part number covers multiple qualification tiers. Confirm RoHS compliance status, noting that compliant versions are available only on commercial grade parts. Ensure the tape and reel packaging matches EIA-296 standards if bulk quantities are not specified.
Selection Notes
Select this component when a 24 V reference is needed in a through-hole DO-41 package. Consider the 5% voltage tolerance indicated by the 'B' suffix. Evaluate thermal derating requirements based on the 80 °C/W junction-to-lead thermal resistance. Verify that the 1 W power dissipation rating aligns with the expected operating conditions and ambient temperatures.
Part Context
This device belongs to the 1N3016B-1 through 1N3045B-1 series of 1 Watt Glass Case Zener Diodes. The series provides a wide selection of voltages from 6.8 to 110 volts in the same glass DO-41 package. Lower voltage options in the 3.3 V to 7.5 V range are available in the 1N3821 through 1N3828 series.
Replacement Considerations
Direct substitutes include other manufacturers' 1N3029B equivalents meeting MIL-PRF-19500/115 specifications. Verify pinout compatibility and ensure the replacement maintains the hermetic seal and tungsten slug construction for equivalent thermal and mechanical performance.
FAQ
What does the 'B' suffix indicate in the part number?
The 'B' suffix indicates a Zener voltage tolerance of 5%.
Is the 1N3029B-1/TR inherently radiation hard?
Yes, the device is inherently radiation hard as described in Microsemi MicroNote 050.
