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1N485
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Product Detailed Parameters
- Description：DIODE STANDARD 180V 100MA DO7
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：180 V
- Current - Average Rectified (Io)：100mA
- Voltage - Forward (Vf) (Max) @ If：1 V @ 100 mA
- Speed：Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：25 nA @ 180 V
- Capacitance @ Vr, F：-
- Mounting Type：Through Hole
- Package / Case：DO-204AA, DO-7, Axial
- Supplier Device Package：DO-7
- Operating Temperature - Junction：-65°C ~ 175°C
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Overview
The Microchip Technology 1N485 is a hermetically sealed switching diode housed in a DO-7 glass package. It features a maximum DC reverse voltage of 180 V and an average forward current rating of 100 mA at 25°C, with a surge current capacity of 2 A for 8.3 ms pulses. The device operates within a junction temperature range of -65°C to +175°C and dissipates up to 500 mW of power. Electrical characteristics include a maximum forward voltage of 1.0 V at 100 mA and a reverse leakage current of 25 nA at 180 V.
Feature Summary
- Hermetically sealed construction utilizing metallurgically bonded double plug design
- Blue body coating with black digit marking for identification
- Copper clad steel leads with tin/lead finish
Applications
- High-reliability computer logic circuits
- Signal processing applications requiring fast switching
- Military and aerospace electronic systems
Procurement Notes
Verify the specific revision suffix (e.g., 1N485B) against the required MIL-PRF-19500/118 quality level. Confirm lead material and finish specifications match system requirements. Ensure environmental compliance documentation aligns with project constraints. Validate thermal derating curves for intended operating temperatures before finalizing procurement orders.
Selection Notes
Select this component when hermetic sealing and high-temperature stability are critical. The DO-7 package provides robust mechanical support for through-hole mounting. Consider the 1.2 mA/°C derating factor above 25°C to ensure safe operation under continuous load conditions. Verify that the 180 V reverse voltage rating exceeds peak circuit voltages.
Part Context
This part belongs to the 1N485 series of general-purpose switching diodes manufactured by Microchip Technology. The series includes variants such as 1N485A and 1N485B, which may differ in qualification levels or specific electrical tolerances while maintaining the same fundamental package and pinout configuration.
Replacement Considerations
Direct substitutes must meet the DO-7 outline and hermetic sealing requirements. Verify equivalent reverse voltage and forward current ratings. Cross-reference MIL-PRF-19500/118 compliance if military-grade reliability is mandated.
