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Product Detailed Parameters
- Description：DIODE STD 225V 500MA DO204AH
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：225 V
- Current - Average Rectified (Io)：500mA
- Voltage - Forward (Vf) (Max) @ If：1 V @ 400 mA
- Speed：Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：50 nA @ 225 V
- Capacitance @ Vr, F：-
- Mounting Type：Through Hole
- Package / Case：DO-204AH, DO-35, Axial
- Supplier Device Package：DO-204AH (DO-35)
- Operating Temperature - Junction：-65°C ~ 175°C
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Overview
The Microchip Technology 1N6661 is a standard recovery rectifier diode qualified to MIL-PRF-19500/587. It features a maximum DC reverse voltage of 225 V and an average forward current rating of 500 mA. The device utilizes voidless-glass construction with a Category I metallurgical bond for hermetic sealing. Key electrical parameters include a forward voltage of 1 V at 400 mA, a reverse leakage current of 50 nA at 225 V, and a junction temperature range from -65°C to 175°C.
Feature Summary
- Military qualification to MIL-PRF-19500/587 standards
- Hermetically sealed voidless-glass construction
- Internal Category I metallurgical bond
Applications
- High-reliability aerospace systems
- Defense electronics requiring failure intolerance
- Harsh environment power rectification
Procurement Notes
Verify the specific package suffix (e.g., /TR for tape and reel) against design requirements, as the base part number refers to through-hole DO-35 packaging. Confirm RoHS compliance status, as military-grade variants may differ from commercial standards. Validate that the MIL-PRF-19500/587 qualification meets project specifications. Ensure ordering documentation explicitly states the required revision level.
Selection Notes
Select this component when military reliability and hermetic sealing are mandatory. The 225 V rating suits low-voltage high-reliability circuits. Consider the 1N6661US variant if surface mount MELF packaging is required instead of axial leads. Evaluate thermal management needs given the wide operating temperature range up to 175°C.
Part Context
This diode belongs to the 1N6661 through 1N6663 series of standard recovery glass rectifiers. The series covers reverse voltages from 225 V to 600 V while maintaining a consistent 500 mA current rating. These devices are designed for applications where traditional plastic packages cannot withstand extreme environmental conditions or require guaranteed hermetic integrity.
Replacement Considerations
The 1N6661US serves as the surface-mount equivalent in the SQ-MELF package. Other series members like 1N6662 (400 V) and 1N6663 (600 V) offer higher voltage ratings with identical current capabilities.
