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Product Detailed Parameters
- Description：DIODE ZENER 75V 500MW SQ-MELF
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Zener (Nom) (Vz)：75 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：180 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 56 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 1N6345US/TR is a surface-mount Zener voltage regulator in the B-SQ MELF package. It provides a nominal Zener voltage of 75V with a standard tolerance of ±5%. The device operates at a test current (IZT) of 1.7mA and exhibits a dynamic impedance (ZZT) of 180 ohms. Maximum power dissipation is rated at 0.5W, with a maximum reverse current of 10µA at 25°C and 80µA at 150°C. Surge current capability is 56A for an 8.3ms square wave.
Feature Summary
- Hermetically sealed voidless glass construction with internal metallurgical bonds for high reliability.
- Military qualification per MIL-PRF-19500/533 across JAN, JANTX, JANTXV, and JANS levels.
- Inherently radiation hard and non-sensitive to electrostatic discharge.
Applications
- High-reliability applications where failure cannot be tolerated.
- Voltage regulation over broad operating current and temperature ranges.
- Over-voltage protection in small-scale, high-density circuit designs.
Procurement Notes
Verify that the specific ordering suffix matches the required reliability level and RoHS compliance status. Confirm the tape and reel packaging configuration aligns with automated assembly requirements. Ensure the requested quantity meets factory minimum order specifications. Validate that the component version corresponds to the intended commercial or military grade application.
Selection Notes
Select this component when a robust, hermetically sealed surface-mount Zener diode is required for critical systems. The 1N6345US/TR offers a 75V breakdown suitable for mid-range voltage regulation tasks. Consider the thermal resistance characteristics and derating curves for proper heat management in enclosed environments.
Part Context
This part belongs to the 1N6309US through 1N6355DUS series of industry-recognized 0.5-watt Zener voltage regulators. The series provides extensive selections from 2.4 to 200 volts with various tolerance options. These devices serve as the surface-mount equivalent of the JEDEC registered axial-leaded 1N6309 through 1N6355 series.
Replacement Considerations
Direct replacements include other parts within the 1N6309US thru 1N6355DUS series that match the 75V specification. Verify compatibility regarding the specific reliability level (JAN, JANTX, etc.) and ensure the replacement maintains the same B-SQ MELF package dimensions and terminal finish.
FAQ
What type of internal bond does the 1N6345US utilize?
The 1N6345US utilizes an internal Category I metallurgical bond, which is specified for devices ranging from 1N6321US through 1N6355US.
Is the 1N6345US sensitive to electrostatic discharge?
No, the device is non-sensitive to ESD per MIL-STD-750 method 1020.
