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Product Detailed Parameters
- Description：DIODE ZENER 27V 500MW SQ-MELF
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Zener (Nom) (Vz)：27 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：27 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 21 V
- Operating Temperature：-65°C ~ 175°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SQ-MELF, B
- Voltage - Forward (Vf) (Max) @ If：1.4 V @ 1 A
- Grade：-
- Qualification：-
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Overview
The Microchip Technology 1N6334US/TR is a surface-mount Zener voltage regulator with a nominal breakdown voltage of 27 V and a 5% tolerance. It operates within a junction temperature range of -65 °C to +175 °C and dissipates up to 0.5 W at an end cap temperature of 150 °C. The device features a dynamic impedance of 27 Ohms at the test current of 4.6 mA, with a maximum reverse leakage current of 10 µA at 25 °C and 100 µA at 150 °C. Packaged in a B-SQ MELF format, it utilizes voidless hermetically sealed glass construction.
Feature Summary
- Hermetically sealed voidless hard glass package with tungsten slugs for robust construction.
- Internal metallurgical bonds designed for high-reliability applications where failure cannot be tolerated.
- Inherently radiation hard and non-sensitive to electrostatic discharge per MIL-STD-750 method 1020.
Applications
- High-reliability military and aerospace circuits requiring strict voltage regulation.
- Radiation-hardened electronic systems.
- Surface mount designs replacing axial-leaded JEDEC registered equivalents.
Procurement Notes
Verify that the specific ordering suffix matches the required reliability level (JAN, JANTX, JANTXV, or JANS) and RoHS compliance status. Confirm the tape and reel packaging configuration aligns with EIA-481-B standards before finalizing procurement orders.
Selection Notes
Select this component when a surface-mount equivalent to the 1N6334 series is required. Ensure the design accommodates the thermal resistance characteristics, specifically the junction-to-end cap and junction-to-ambient values, to maintain power dissipation within the specified limits across the operating temperature range.
Part Context
This part belongs to the 1N6309US through 1N6355DUS series of 0.5 watt Zener voltage regulators. The series offers selections from 2.4 to 200 volts with standard 5% tolerances and tighter 1% and 2% options. It serves as the surface-mount counterpart to the industry-recognized axial-leaded packages.
Replacement Considerations
Public confirmed substitute part numbers include JAN1N6334C and JAN1N6334D.
FAQ
What type of internal bond does the 1N6334US utilize?
It utilizes Category I internal metallurgical bonds.
Is the 1N6334US sensitive to electrostatic discharge?
No, the device is non-sensitive to ESD per MIL-STD-750 method 1020.
