Overview
The 1N4148UB is a high-performance switching/signal diode manufactured by Microchip Technology, which acquired Microsemi in 2018. This diode is designed for military-grade applications and is constructed with a ceramic body, adhering to the MIL-PRF-19500/116 standards. It features a surface mount UB package and is known for its low capacitance and very fast switching speeds, making it ideal for various electronic circuits.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Forward Voltage | VF | 0.8 | V | ||
| Junction Capacitance | CJ | 4 | pF | ||
| Reverse Recovery Time | trr | 5 | ns | ||
| Forward Surge Peak Current | IFSM | 2 | A | ||
| Junction Temperature | TJ | -65 | 200 | °C | |
| Output Current | IOUT | 0.2 | A | ||
| Reverse Breakdown Voltage | VBR | 75-100 | V | ||
| Thermal Resistance, Junction to Ambient | RθJA | 325 | °C/W | ||
| Thermal Resistance, Surface Mount Junction to Lead | RθJSP | 120 | °C/W |
Key Features
- Fast switching speeds with a reverse recovery time of 5 ns.
- Low junction capacitance of 4 pF.
- Ceramic body construction for military-grade reliability.
- Surface mount UB package for easy integration into modern circuits.
- Wide operating temperature range from -65°C to 200°C.
Applications
The 1N4148UB diode is suitable for a variety of applications, including:
- Switching and signal processing circuits.
- Military and aerospace electronics due to its adherence to MIL-PRF-19500/116 standards.
- High-frequency applications requiring low capacitance and fast switching times.
- General-purpose rectification in electronic devices.
Q & A
- What is the primary use of the 1N4148UB diode?
The 1N4148UB diode is primarily used for switching and signal processing applications due to its fast switching speeds and low capacitance. - What is the maximum forward current rating of the 1N4148UB diode?
The maximum forward current rating is 0.2 A. - What is the reverse recovery time of the 1N4148UB diode?
The reverse recovery time is 5 ns. - What is the junction capacitance of the 1N4148UB diode?
The junction capacitance is 4 pF. - What are the operating temperature limits for the 1N4148UB diode?
The operating temperature range is from -65°C to 200°C. - Is the 1N4148UB diode RoHS compliant?
Some versions of the 1N4148UB may not be RoHS compliant; it is important to check the specific part number and manufacturer's documentation. - What package types are available for the 1N4148UB diode?
The diode is available in a surface mount UB package. - What are the thermal resistance values for the 1N4148UB diode?
The thermal resistance from junction to ambient is 325 °C/W, and from surface mount junction to lead is 120 °C/W. - What is the maximum reverse breakdown voltage of the 1N4148UB diode?
The maximum reverse breakdown voltage ranges from 75 V to 100 V. - Can the 1N4148UB diode be used in military applications?
Yes, it is designed for military-grade applications and meets MIL-PRF-19500/116 standards.
