Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Device type | High-speed switching diode |
| Breakdown voltage | 100 V minimum |
| Working peak reverse voltage | 75 V |
| Average rectified current | 200 mA at TA = 75°C under specified PCB conditions |
| Reverse recovery time | 5 ns maximum |
| Junction capacitance | 4.0 pF at 0 V, 1 MHz |
| Package | Hermetic glass DO-213AA |
| Product family status | In Production |
Product Overview
The 1N4148UR-1/TR is the tape-and-reel form of Microchip’s high-reliability 1N4148UR-1 surface-mount switching diode in a hermetic glass DO-213AA package. It is intended for fast switching, signal steering, detector and blocking functions where low capacitance and a robust glass package are useful.
This is not the same package as the axial 1N4148-1 or other small-signal diode variants. Mechanical substitution should preserve the DO-213AA MELF footprint, while electrical replacement should include reverse-recovery and capacitance requirements rather than matching only the 75 V working rating.
Technical Specifications
| Parameter | Confirmed Information |
|---|---|
| Breakdown voltage | 100 V |
| Working peak reverse voltage | 75 V |
| Average rectified current | 200 mA at TA = 75°C, specified PCB |
| Surge current | 2 A peak, 8.3 ms |
| VF maximum | 0.8 V at IF = 10 mA |
| VF maximum | 1.2 V at IF = 100 mA |
| Reverse recovery time | 5 ns max at IF = IR = 10 mA, RL = 100 Ω |
| Forward recovery time | 20 ns max at IF = 50 mA |
| Capacitance | 4.0 pF at VR = 0 V; 2.8 pF at VR = 1.5 V, 1 MHz |
| Junction/storage temperature | -65°C to +175°C |
| Package | DO-213AA hermetic glass |
Design Considerations
The 200 mA average-current rating is tied to the manufacturer’s mounting and ambient conditions. For continuous current, calculate diode dissipation from the actual forward-voltage operating point and the board thermal path instead of treating the current rating as package-independent.
For high-speed nodes, the 5 ns reverse-recovery limit and a few picofarads of capacitance are often more relevant than the DC forward-current rating. Compare those dynamic parameters when considering a substitute.
Related Engineering Resources
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Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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