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Microchip Technology 1N4148UBD/TR
- Part No.:
- 1N4148UBD/TR
- Manufacturer:
- Microchip Technology
- Category:
- Diode Arrays
- Package:
- 3-SMD, No Lead
- Datasheet:
-
1N4148UBD/TR.pdf
- Description:
- DIODE ARRAY GP 75V 200MA UB
- Quantity:
- Payment:
- Shipping:
Inventory:92
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Product details
Overview
1N4148UBD/TR from Microsemi is a military-qualified surface-mount silicon switching diode in the UB package, featuring 75 V peak reverse voltage, 200 mA average forward current, 5 ns reverse recovery time, and 4.0 pF capacitance at 0 V - used in high-frequency RS-232/RS-422 interface networks and Ethernet 10 Base-T signal routing.
For engineers reviewing the 1N4148UBD/TR datasheet, 1N4148UBD/TR pinout, 1N4148UBD/TR application, or 1N4148UBD/TR equivalent, key selection criteria include MIL-PRF-19500/116 qualification level (JANTXV), ceramic-body thermal performance (RθJSP = 120 °C/W), unidirectional polarity, RoHS compliance, and low-profile SMT compatibility.
Technical Context
This diode operates as a unidirectional fast-switching device with minimal charge storage, enabling clean transitions in digital logic and data line clamping. Its ceramic UB package supports operation from –65 °C to +200 °C junction temperature and delivers stable leakage performance (<25 nA @ 20 V, 25 °C) and low forward voltage (0.8 V @ 10 mA).
The 1N4148UBD/TR is characterized for high-speed signal integrity: reverse recovery time trr = 5 ns under IF = IR = 10 mA, RL = 100 Ω, and capacitance remains below 4.0 pF at 0 V bias - critical for minimizing crosstalk in multi-line communication interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Reverse Voltage | 75 V - defines maximum continuous DC reverse bias before breakdown in signal line protection applications |
| Reverse Recovery Time | 5 ns - enables reliable operation up to ~70 MHz switching in data line clamping and waveform shaping |
| Capacitance @ 0 V | 4.0 pF - minimizes signal distortion and loading on high-speed digital lines such as RS-422 |
| Forward Voltage @ 10 mA | 0.8 V max - ensures low power loss and minimal voltage drop in logic-level signal steering |
| Junction Temp Range | –65 °C to +200 °C - supports deployment in extended-temperature military and aerospace environments |
| Thermal Resistance J-to-Pad | 120 °C/W - allows direct thermal path to PCB copper for sustained 200 mA operation without heatsinking |
Pinout & Package
Ceramic surface-mount UB package (2-pin, unidirectional), gold-plated nickel terminals, <0.04 g weight, tape-and-reel packaging per EIA-418D. Dimensions: 2.92–3.25 mm length × 2.16–2.74 mm width × 1.17–1.42 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential node during conduction; marked side of diode body indicates cathode |
| Cathode | Forward current exit point / reverse blocking terminal | Connected to lower-potential node; metallized area on ceramic body identifies cathode end per package drawing |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/116 qualification | JANTXV-level reliability certified for defense/aerospace use with full traceability and screening |
| Ceramic UB package | Hermetic, low-thermal-mass construction enabling stable operation across –65 °C to +200 °C |
| Low capacitance (4.0 pF) | Preserves signal edge rate and reduces crosstalk in multi-line differential interfaces |
| Fast trr = 5 ns | Supports clean switching in >10 MHz clock/data recovery circuits without tail current artifacts |
Applications
| RS-232 Interface Protection | Ethernet 10 Base-T Signal Clamping |
|---|---|
Use Scenario: Protecting UART transceivers against ESD and line transients in industrial control panels. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between TX/RX lines and ground to shunt overvoltage. Use Value: 5 ns trr and 75 V VRWM ensure fast response to ±15 kV HBM events while maintaining signal fidelity at 115.2 kbps. | Use Scenario: Limiting voltage excursions on twisted-pair PHY outputs in legacy Ethernet hubs. IC Role / Device Role / Timing Role: Signal line clamp diode in receiver input stage to prevent saturation of differential amplifiers. Use Value: 4.0 pF capacitance avoids degrading 10 MHz square-wave rise/fall times; ceramic package withstands reflow and thermal cycling. |
| LAN Transceiver Bias Steering | High-Frequency Logic-Level Translation |
Use Scenario: Biasing and level-shifting analog front-end inputs in multi-port LAN switches. IC Role / Device Role / Timing Role: Fast-switching diode used in active bias networks to set common-mode voltage points. Use Value: 0.8 V VF at 10 mA enables precise 3.3 V/5 V domain interfacing with sub-100 mV error margins. | Use Scenario: Converting TTL-compatible signals to CMOS thresholds in FPGA configuration buses. IC Role / Device Role / Timing Role: Passive level translator using forward conduction to shift logic 'high' reference. Use Value: 200 mA IO rating supports burst-mode operation; 120 °C/W RθJSP prevents thermal runaway during repeated switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148W-7-F (Diodes Inc.) | Commercial-grade SOD-123 package; trr = 4 ns, VF = 1.25 V @ 100 mA, no MIL spec | Limited to commercial temperature range (–65 °C to +150 °C); not qualified for defense use | Select when cost-sensitive industrial designs do not require JANTXV screening or extended temp operation |
| 1N4148TR (ON Semiconductor) | DO-35 axial package; same electrical specs but higher RθJA = 500 °C/W; leaded, not SMT | Requires through-hole assembly; unsuitable for high-density PCBs or automated SMT lines | Choose only for legacy repair, prototyping, or where manual assembly and axial footprint are acceptable |
Compared with 1N4148W-7-F and 1N4148TR, the 1N4148UBD/TR uniquely combines JANTXV qualification, ceramic UB SMT packaging, and 120 °C/W thermal resistance - making it the sole option for compact, high-reliability, high-temperature military data interfaces.
Availability
1N4148UBD/TR is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T signal clamping, and LAN transceiver bias steering requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for 1N4148UBD/TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and RF solutions for aerospace, defense, and industrial markets.
The 1N4148UBD/TR belongs to Microsemi's military-qualified discrete diode product line, engineered specifically for ruggedized signal integrity in harsh-environment data communication systems.
FAQ
What is the qualification level of the 1N4148UBD/TR?
The 1N4148UBD/TR is qualified to MIL-PRF-19500/116 at JANTXV level, including full screening for vibration, shock, temperature cycling, and hermeticity. This certification confirms suitability for mission-critical aerospace and defense applications where failure is not an option.
Does the 1N4148UBD/TR have a common cathode or common anode configuration?
The 1N4148UBD/TR is unidirectional - meaning it has one anode and one cathode terminal, with no shared terminals. The "D" suffix in the nomenclature denotes unidirectional polarity, and the cathode is identified by a metallized band on the ceramic body per package drawing.
What is the maximum operating temperature for the 1N4148UBD/TR?
The 1N4148UBD/TR supports a junction and storage temperature range of –65 °C to +200 °C. Its ceramic UB package and gold-plated terminals enable stable performance at the full upper limit, unlike plastic-packaged alternatives limited to +150 °C.
How does the 1N4148UBD/TR compare to standard 1N4148 in DO-35 package?
The 1N4148UBD/TR retains identical electrical characteristics (VF, trr, VRWM, C) but replaces the axial DO-35 package with a ceramic surface-mount UB package. This change improves thermal dissipation (RθJSP = 120 °C/W vs. ~500 °C/W), enables automated assembly, and extends temperature capability to +200 °C.
Is the 1N4148UBD/TR RoHS compliant?
Yes, the 1N4148UBD/TR is RoHS compliant by design, with lead-free terminations and halogen-free materials. Compliance is verified per JEDEC J-STD-609 and documented in Microsemi's material declarations, supporting environmental requirements for global defense and industrial deployments.
1N4148UBD/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 3-SMD, No Lead
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 75 V
- Current - Average Rectified (Io) (per Diode):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 500 nA @ 75 V
- Operating Temperature - Junction:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- UB
1N4148UBD/TR FAQ
1.How can I place an order for 1N4148UBD/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4148UBD/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N4148UBD/TR reliable?
The price and inventory of 1N4148UBD/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4148UBD/TR is usually 5 days.
3.What payment methods are accepted for 1N4148UBD/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148UBD/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4148UBD/TR?
1N4148UBD/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4148UBD/TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N4148UBD/TR?
For technical support, including 1N4148UBD/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148UBD/TR requirements.
6.How does Aetrix verify that 1N4148UBD/TR is sourced from the original manufacturer or authorized distributors?
All 1N4148UBD/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N4148UBD/TR meets industry standards.
7.What is the process for return or replacement of 1N4148UBD/TR?
All 1N4148UBD/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148UBD/TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N4148UBD/TR part is unused and in its original packaging.
Return procedure for 1N4148UBD/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4148UBD/TR Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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