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Microchip Technology JAN1N4148UB2R
- Part No.:
- JAN1N4148UB2R
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- 2-SMD, No Lead
- Datasheet:
-
JAN1N4148UB2R.pdf
- Description:
- DIODE GEN PURP 75V 200MA UB2R
- Quantity:
- Payment:
- Shipping:
Inventory:6,851
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Product details
Overview
JAN1N4148UB2R from Microsemi is a military-grade ceramic surface-mount switching diode qualified to MIL-PRF-19500/116 at JAN level, featuring 75 V working peak reverse voltage, 200 mA average rectified current at 75 °C, and 5 ns reverse recovery time. It serves as a low-capacitance, high-speed signal routing device in RS-232 interfaces and Ethernet 10 Base-T receivers.
For engineers reviewing the JAN1N4148UB2R datasheet, JAN1N4148UB2R pinout, JAN1N4148UB2R application, or JAN1N4148UB2R equivalent, key selection criteria include reverse recovery time, junction temperature range (–65 to +200 °C), ceramic package thermal resistance (120 °C/W junction-to-solder pad), and JAN-level reliability qualification for aerospace and defense systems.
Technical Context
This diode implements a planar silicon PN junction optimized for fast transient response and low leakage. Its ceramic UB2 package enables stable operation up to +200 °C junction temperature and provides hermetic sealing required for high-reliability environments.
The device operates with minimal forward voltage drop (0.8 V @ 10 mA) and ultra-low capacitance (4.0 pF @ 0 V, 1 MHz), supporting clean signal integrity in high-frequency data paths. Reverse polarity marking ('R' suffix) confirms cathode-anode orientation per JEDEC 1N4148 standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 75 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin in RS-422 line receivers. |
| trr | 5 ns - Time to transition from forward conduction to reverse blocking; enables >100 MHz switching in pulse shaping circuits. |
| VF @ 10 mA | 0.8 V max - Low forward drop minimizes power loss and self-heating in battery-powered sensor interface designs. |
| C @ 0 V | 4.0 pF - Ultra-low junction capacitance preserves signal edge rate in 10/100 Mbps Ethernet PHY front-ends. |
| TJ Range | –65 to +200 °C - Extended thermal envelope supports operation in avionics enclosures and engine-mounted control units. |
| RθJSP | 120 °C/W - Junction-to-solder-pad thermal resistance enables direct PCB copper pour heat sinking without external heatsinks. |
Pinout & Package
Two-terminal ceramic surface-mount device in UB2 package: gold-plated nickel terminals on ceramic body, marked with part number and date code. Dimensions: 3.25 mm × 2.74 mm × 1.42 mm (L × W × H), with metallized shielding areas on lid.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node in clamping or steering configurations; requires trace routing compatible with 200 mA DC current density. |
| Cathode | Forward current exit / reverse voltage reference | Marked side of package; ties to signal return or bias rail; shields sensitive analog nodes when lid is grounded via metallized area. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/116 JAN qualification | Validated burn-in, life test, and radiation tolerance per military screening requirements - mandatory for flight-critical subsystems. |
| Reverse polarity option (R suffix) | Guaranteed anode-first orientation matching legacy board layouts requiring inverted 1N4148 placement without redesign. |
| Ceramic hermetic construction | Eliminates moisture ingress and parameter drift over 20+ year service life in humid or sealed military enclosures. |
| Low IR @ 75 V (0.5 µA) | Prevents false triggering in high-impedance logic inputs and precision voltage reference protection networks. |
Applications
| RS-232 Line Receiver Protection | Ethernet 10 Base-T Transceiver Clamp |
|---|---|
Use Scenario: Protecting UART receiver inputs against ESD and cable-induced transients in ruggedized industrial terminals. IC Role / Device Role / Timing Role: Fast-clamping diode placed between RS-232 input and ground, conducting surge energy within 5 ns. Use Value: Prevents latch-up in MAX3232-level transceivers by limiting voltage excursion to <15 V during ±8 kV contact discharge. | Use Scenario: Shielding differential pair inputs of DP83848 PHY from induced surges on unshielded twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional transient suppressor across TX+/TX− lines, leveraging low capacitance to avoid signal distortion. Use Value: Maintains <1% rise-time degradation at 10 Mbps while clamping 10/1000 µs surges to ≤12 V. |
| Aerospace Data Bus Isolation | Avionics Power Supply Sequencing |
Use Scenario: Signal isolation between ARINC 429 transmitter output and downstream bus monitor circuitry. IC Role / Device Role / Timing Role: Unidirectional level-shifting diode enabling voltage domain separation without galvanic coupling. Use Value: Ensures <1 ns propagation skew between dual-channel monitors due to matched trr and VF across JAN-binned lots. | Use Scenario: OR-ing diode in dual-redundant 28 VDC power supply paths for flight control computers. IC Role / Device Role / Timing Role: Low-loss forward path selector with reverse-blocking capability during hot-swap transitions. Use Value: Limits forward drop to ≤0.85 V at 150 mA, reducing thermal load on PCB copper pours in confined avionics bays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4148UB2R | Higher screening level (JANTXV) with extended life test and radiation hardness verification. | Required for space-grade payloads and missile guidance electronics where single-event burnout risk exists. | Select JANTXV1N4148UB2R only when mission-critical radiation tolerance and 100% lot testing are mandated. |
| 1N4148UR-1 | MELF package (DO-213AA), glass body, no hermetic seal; trr = 4 ns, C = 4 pF, TJ = –65 to +175 °C. | Suitable for commercial/industrial Ethernet PHYs but not qualified for MIL-PRF-19500/116 environments. | Choose 1N4148UR-1 for cost-sensitive terrestrial networking gear where hermeticity and +200 °C operation are unnecessary. |
Compared with JAN1N4148UB2R, JANTXV1N4148UB2R adds radiation assurance at higher cost and longer lead time, while 1N4148UR-1 trades military qualification for MELF mechanical robustness and slightly faster trr - neither is pin-compatible due to differing package footprints and terminal geometry.
Availability
JAN1N4148UB2R is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T transceiver clamping, and aerospace data bus isolation requiring stable component supply under extended temperature and reliability constraints.
Supply support for JAN1N4148UB2R 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 mixed-signal ICs, RF solutions, and radiation-hardened components.
The JAN1N4148UB2R belongs to Microsemi's military diode product line, engineered specifically for defense, aerospace, and critical infrastructure applications demanding guaranteed performance across extreme thermal and environmental stress.
FAQ
What does the 'R' suffix mean in JAN1N4148UB2R?
The 'R' suffix in JAN1N4148UB2R indicates reverse polarity configuration - the cathode is located on the marked side of the UB2 package, opposite the standard orientation. This matches legacy PCB footprints designed for inverted 1N4148 placement, eliminating layout changes when upgrading to JAN-grade reliability. JAN1N4148UB2R maintains identical electrical specs and thermal performance as the non-R variant.
Is JAN1N4148UB2R RoHS compliant?
Yes, JAN1N4148UB2R is RoHS compliant by design, meeting Directive 2011/65/EU requirements for restricted substances. Its gold-plated nickel terminals and ceramic body contain no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE. Compliance is verified through material declarations and process controls, not post-manufacture testing.
What is the maximum junction temperature rating for JAN1N4148UB2R?
JAN1N4148UB2R has a maximum junction temperature rating of +200 °C, validated per MIL-PRF-19500/116 screening. This exceeds commercial 1N4148 variants (typically +150 °C or +175 °C) and enables deployment in engine bay controllers, satellite power converters, and other high-thermal-stress environments where sustained operation above +150 °C is required.
How does the UB2 package differ from DO-35 or MELF packages used in other 1N4148 variants?
The UB2 package is a two-pin ceramic surface-mount case with gold-plated terminals and hermetic sealing, unlike axial DO-35 or cylindrical MELF glass packages. Its 3.25 mm × 2.74 mm footprint enables high-density routing, while the ceramic body ensures zero moisture permeability and stable parameters across humidity cycles - critical for long-life military deployments where DO-35 and MELF variants may experience parameter drift.
Can JAN1N4148UB2R replace commercial 1N4148UB in existing designs?
JAN1N4148UB2R can replace commercial 1N4148UB only if the PCB layout accommodates the same UB2 footprint and the application requires JAN-level reliability, extended temperature range, and hermetic packaging. Electrical parameters are functionally identical, but JAN1N4148UB2R undergoes additional screening (burn-in, life test, lot acceptance). No requalification is needed for form-fit-function compatibility, but system-level MIL-STD-810 testing may be required for full certification.
JAN1N4148UB2R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 2-SMD, No Lead
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard, Reverse Polarity
- Voltage - DC Reverse (Vr) (Max):
- 75 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 20 ns
- Current - Reverse Leakage @ Vr:
- 500 nA @ 75 V
- Capacitance @ Vr, F:
- 4pF @ 0V, 1MHz
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/116
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- UB2R
- Operating Temperature - Junction:
- -65°C ~ 200°C
JAN1N4148UB2R FAQ
1.How can I place an order for JAN1N4148UB2R through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4148UB2R 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 JAN1N4148UB2R reliable?
The price and inventory of JAN1N4148UB2R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4148UB2R is usually 5 days.
3.What payment methods are accepted for JAN1N4148UB2R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4148UB2R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4148UB2R?
JAN1N4148UB2R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4148UB2R 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 JAN1N4148UB2R?
For technical support, including JAN1N4148UB2R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4148UB2R requirements.
6.How does Aetrix verify that JAN1N4148UB2R is sourced from the original manufacturer or authorized distributors?
All JAN1N4148UB2R 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 JAN1N4148UB2R meets industry standards.
7.What is the process for return or replacement of JAN1N4148UB2R?
All JAN1N4148UB2R units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4148UB2R, 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 JAN1N4148UB2R part is unused and in its original packaging.
Return procedure for JAN1N4148UB2R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JAN1N4148UB2R Tags
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1N4448X-TP
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1N4148WX-TP
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1N4148TR
onsemi
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MMSD4148T1G
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BAS16HT1G
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1N914BWT
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BAS21LT1G
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LL4148
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BAS16LT1G
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MMSD914T1G
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BAV21W-7-F
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