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Microchip Technology 1N4148UBCD/TR
- Part No.:
- 1N4148UBCD/TR
- Manufacturer:
- Microchip Technology
- Category:
- Diode Arrays
- Package:
- 3-SMD, No Lead
- Datasheet:
-
1N4148UBCD/TR.pdf
- Description:
- DIODE ARRAY GEN PURP 75V 1A UBC
- Quantity:
- Payment:
- Shipping:
Inventory:7,762
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Product details
Overview
1N4148UBCD/TR from Microsemi is a military-qualified surface-mount silicon switching diode in the UB ceramic package, featuring 75 V working peak reverse voltage, 200 mA average rectified current at 75 °C, 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 1N4148UBCD/TR datasheet, 1N4148UBCD/TR pinout, 1N4148UBCD/TR application, or 1N4148UBCD/TR equivalent, this page delivers verified MIL-PRF-19500/116 qualified parameters, UB package thermal resistance (RθJSP = 120 °C/W), polarity options, RoHS compliance status, and JANTXV-level reliability data for embedded communications and aerospace signal conditioning designs.
Technical Context
This diode operates as a unidirectional fast-switching junction device with gold-plated nickel terminals on a ceramic case, optimized for low-capacitance signal routing in harsh environments. Its 5 ns reverse recovery time and 0.8 V forward voltage at 10 mA enable clean edge transitions in digital logic interfaces and transient-suppressed data lines.
The UB package supports solder-pad thermal dissipation (RθJSP = 120 °C/W) and operates across –65 to +200 °C junction temperature range, meeting MIL-PRF-19500/116 requirements for JAN/JANTX/JANTXV reliability levels without derating up to 75 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage | 75 V - maximum continuous DC reverse bias before breakdown in signal line protection applications |
| Reverse Recovery Time (trr) | 5 ns - enables reliable operation up to ~70 MHz switching in digital interface circuits |
| Capacitance (VR = 0 V) | 4.0 pF - minimizes signal distortion and crosstalk in high-speed data paths like RS-422 |
| Average Rectified Current | 200 mA @ TA = 75 °C - supports sustained current handling in buffered I/O drivers |
| Junction Temperature Range | –65 to +200 °C - certified for extended operation in avionics, downhole, and space-grade systems |
| Forward Voltage (IF = 10 mA) | 0.8 V max - ensures low power loss and minimal voltage drop in clamping and steering functions |
| Thermal Resistance J-to-Solder Pad | 120 °C/W - defines PCB copper pad area requirement for thermal management in sealed enclosures |
Pinout & Package
Ceramic surface-mount UB package with two terminals: base-mounted metallized pads on underside; no leads. Dimensions: 3.25 mm × 2.74 mm × 1.42 mm (L × W × H), weight < 0.04 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pad 1 | Anode | Forward current entry point; connects to signal source or pull-up network |
| Pad 2 | Cathode | Forward current exit point; ties to ground reference or logic-low node in clamping |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/116 qualification | JAN/JANTX/JANTXV levels confirmed - meets screening, testing, and traceability requirements for defense electronics |
| Low capacitance (4.0 pF @ 0 V) | Preserves signal integrity in >10 Mbps serial links without added termination complexity |
| Fast trr = 5 ns | Supports clean switching in clock distribution, pulse shaping, and sample-and-hold front-ends |
| Ceramic UB package | Hermetic seal and CTE-matched construction ensure reliability under thermal cycling and humidity exposure |
| RoHS compliant by design | No lead, cadmium, or hexavalent chromium - suitable for export-controlled and green manufacturing programs |
Applications
| RS-232/RS-422 Interface Protection | Ethernet 10 Base-T Signal Routing |
|---|---|
Use Scenario: Bidirectional ESD and overvoltage protection on differential receiver inputs of industrial serial transceivers. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between data line and local ground to shunt transients below 75 V. Use Value: 5 ns trr prevents data corruption during fast edge transitions; 4.0 pF capacitance avoids signal rise-time degradation. | Use Scenario: Polarity correction and DC blocking in transformer-coupled 10 Base-T PHY interfaces. IC Role / Device Role / Timing Role: Signal steering diode in auto-MDIX circuitry to manage transmit/receive pair selection. Use Value: 0.8 V VF at 10 mA ensures minimal insertion loss; ceramic package withstands reflow and conformal coating processes. |
| Avionics Data Bus Clamping | Downhole Sensor Signal Conditioning |
Use Scenario: Transient suppression on ARINC 429 or MIL-STD-1553 bus lines exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-recovery clamp limiting reverse voltage to 75 V while preserving signal fidelity up to 1 MHz. Use Value: –65 to +200 °C operating range and JANTXV qualification support flight-critical system certification. | Use Scenario: Level-shifting and fault isolation in high-temperature pressure/temperature sensor modules deployed at >150 °C. IC Role / Device Role / Timing Role: Signal path switch enabling multiplexed analog output routing under extreme thermal stress. Use Value: 120 °C/W RθJSP allows direct thermal coupling to heatsinked PCB regions; ceramic body resists chemical corrosion. |
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.) | Surface-mount SOD-123 package; 100 V V(BR); 4 ns trr; 4.0 pF; commercial grade only | Lacks MIL-PRF-19500/116 qualification and extended temperature range | Select when cost-sensitive commercial designs require faster trr but do not need military screening |
| NSR0230HT1G (onsemi) | Schottky architecture; 30 V VRWM; 0.35 V VF; 100 mA IO; no reverse recovery (trr = N/A) | Lower VF improves efficiency but insufficient VRWM for 75 V signal line protection | Choose for low-voltage, high-efficiency clamping where reverse leakage tolerance exceeds 0.5 µA |
Compared with 1N4148UBCD/TR, the 1N4148W-7-F offers marginally faster switching but lacks military qualification and extended temperature capability, while the NSR0230HT1G provides near-zero forward drop but cannot sustain 75 V reverse bias - making 1N4148UBCD/TR uniquely suited for ruggedized high-voltage signal routing.
Availability
1N4148UBCD/TR is available at Aetrix Electronics and suitable for RS-232/RS-422 interface protection, Ethernet 10 Base-T signal routing, and avionics data bus clamping requiring stable component supply across extended temperature and reliability grades.
Supply support for 1N4148UBCD/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The 1N4148UBCD/TR belongs to Microsemi's military-qualified discrete diode product line, engineered specifically for signal integrity and survivability in mission-critical communication and sensing systems operating under extreme environmental stress.
FAQ
What is the polarity configuration of the 1N4148UBCD/TR?
The 1N4148UBCD/TR is a unidirectional switching diode with standard anode-cathode polarity. Per Microsemi's nomenclature, the "D" suffix indicates unidirectional configuration; Pad 1 is the anode and Pad 2 is the cathode. This matches JEDEC 1N4148 functionality and supports conventional forward-biased clamping and steering roles in signal paths.
Is the 1N4148UBCD/TR qualified to MIL-PRF-19500/116?
Yes, the 1N4148UBCD/TR is qualified per MIL-PRF-19500/116 at JANTXV level - the highest reliability tier - including rigorous screening for vibration, thermal shock, hermeticity, and lot acceptance testing. This qualification is documented in Microsemi T4-LDS-0281-2 Rev. 1 and applies directly to the 1N4148UBCD/TR variant.
What is the thermal resistance from junction to solder pad for the 1N4148UBCD/TR?
The 1N4148UBCD/TR has a thermal resistance of RθJSP = 120 °C/W, measured from junction to solder pad under defined test conditions. This value guides PCB copper area design for thermal relief in sealed or convection-limited environments and is specified in the Microsemi datasheet T4-LDS-0281-2, Page 1.
Does the 1N4148UBCD/TR meet RoHS requirements?
Yes, the 1N4148UBCD/TR is RoHS compliant by design, containing no lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). Compliance is confirmed in Microsemi's documentation and supported by material declarations aligned with EU Directive 2011/65/EU.
What is the maximum reverse recovery time (trr) of the 1N4148UBCD/TR?
The maximum reverse recovery time (trr) of the 1N4148UBCD/TR is 5 ns, tested at IF = IR = 10 mA, RL = 100 Ω. This value is guaranteed across the full qualified temperature range and enables reliable operation in high-speed digital interfaces such as RS-422 and Ethernet 10 Base-T without signal edge degradation.
1N4148UBCD/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):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 800 mV @ 100 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 25 nA @ 20 V
- Operating Temperature - Junction:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- UBC
1N4148UBCD/TR FAQ
1.How can I place an order for 1N4148UBCD/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4148UBCD/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 1N4148UBCD/TR reliable?
The price and inventory of 1N4148UBCD/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4148UBCD/TR is usually 5 days.
3.What payment methods are accepted for 1N4148UBCD/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148UBCD/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4148UBCD/TR?
1N4148UBCD/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4148UBCD/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 1N4148UBCD/TR?
For technical support, including 1N4148UBCD/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148UBCD/TR requirements.
6.How does Aetrix verify that 1N4148UBCD/TR is sourced from the original manufacturer or authorized distributors?
All 1N4148UBCD/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 1N4148UBCD/TR meets industry standards.
7.What is the process for return or replacement of 1N4148UBCD/TR?
All 1N4148UBCD/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148UBCD/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 1N4148UBCD/TR part is unused and in its original packaging.
Return procedure for 1N4148UBCD/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4148UBCD/TR Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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