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Microchip Technology JAN1N4148UB
- Part No.:
- JAN1N4148UB
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- 3-SMD, No Lead
- Datasheet:
-
JAN1N4148UB.pdf
- Description:
- DIODE GEN PURP 75V 200MA UB
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
JAN1N4148UB from Microsemi is a military-qualified surface-mount silicon switching diode in a ceramic UB package, featuring 100 V breakdown voltage, 5 ns reverse recovery time, 0.8 V forward voltage at 10 mA, and operation from −65 °C to +200 °C - used in high-frequency RS-232/RS-422 interface networks and Ethernet 10 Base-T data lines.
For engineers reviewing the JAN1N4148UB datasheet, JAN1N4148UB pinout, JAN1N4148UB application, or JAN1N4148UB equivalent, this page delivers verified military-grade diode specifications, polarity options (unidirectional, common anode, common cathode, doubler), thermal resistance (120 °C/W junction-to-solder pad), and RoHS-compliant construction per MIL-PRF-19500/116.
Technical Context
This diode implements a planar-diffused silicon PN junction optimized for fast transient response and low capacitance. Its ceramic UB package enables stable operation under extreme thermal cycling and high-reliability environments, with gold-plated terminals ensuring low-contact resistance and solderability.
The device supports multiple polarities - unidirectional, common anode (CA), common cathode (CC), and doubler (D) - each with identical electrical ratings but distinct internal interconnects. Reverse recovery time (trr = 5 ns) is measured under standardized conditions (IF = IR = 10 mA, RL = 100 Ω), confirming suitability for >10 MHz signal switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 100 V - maximum non-destructive reverse voltage before avalanche conduction begins |
| Reverse Recovery Time | 5 ns - time required for current to fall to specified level after polarity reversal, enabling >10 MHz switching |
| Forward Voltage | 0.8 V @ 10 mA - low conduction loss in signal routing and clamping circuits |
| Junction Temp Range | −65 °C to +200 °C - validated for aerospace, downhole, and high-temp industrial use |
| Capacitance | 4.0 pF @ 0 V - minimal signal distortion in RF and high-speed digital line termination |
| Thermal Resistance | 120 °C/W (junction-to-solder pad) - enables direct thermal path to PCB copper for power dissipation |
Pinout & Package
Ceramic UB package: surface-mount, two-terminal, hermetically sealed, gold-plated nickel terminals, weight < 0.04 g. Dimensions: 3.25 mm × 2.74 mm × 1.42 mm (L × W × H), with metallized base and lid areas per ASME Y14.5M.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pad 1 | Anode (Unidirectional) | Primary P-side connection; polarity varies by variant (CA/CC/D) |
| Pad 2 | Cathode (Unidirectional) | Primary N-side connection; defines direction of forward conduction |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/116 Qualification | JAN-level reliability certified for defense and space applications with full lot traceability |
| Low Capacitance (4.0 pF) | Minimizes loading on high-speed data lines such as RS-422 and Ethernet 10 Base-T |
| Fast trr (5 ns) | Enables clean edge transitions in pulse shaping, sample-and-hold, and logic-level translation |
| Ceramic Hermetic Construction | Prevents moisture ingress and parameter drift over 20+ year service life in harsh environments |
Applications
| RS-232 Interface Protection | Ethernet 10 Base-T Line Clamping |
|---|---|
Use Scenario: Protecting UART transceivers from ESD and line transients in ruggedized serial communication systems. IC Role / Device Role / Timing Role: Signal-level clamping diode placed between TX/RX lines and ground or VCC rail. Use Value: 5 ns trr ensures minimal signal distortion during fast edge transitions; 100 V V(BR) withstands ±15 V RS-232 swing plus surges. | Use Scenario: Bidirectional transient suppression on differential pairs in legacy Ethernet PHY interfaces. IC Role / Device Role / Timing Role: Low-capacitance steering diode in TVS-assisted clamping networks. Use Value: 4.0 pF capacitance avoids impedance mismatch on 100 Ω twisted-pair lines; ceramic package sustains repeated surge events. |
| High-Temp Sensor Signal Conditioning | Aerospace Avionics Power Sequencing |
Use Scenario: Level-shifting and isolation of analog sensor outputs in turbine engine monitoring systems. IC Role / Device Role / Timing Role: Fast-switching signal diode in precision rectifier and peak-detect circuits. Use Value: −65 °C to +200 °C operating range matches thermocouple amplifier requirements; low VF reduces offset error. | Use Scenario: Controlled turn-on sequencing of multiple DC-DC converters in flight control computers. IC Role / Device Role / Timing Role: Polarity-selectable (CA/CC) diode in OR-ing and hold-up circuits. Use Value: JAN qualification guarantees burn-in and radiation tolerance; 2 A IFSM handles inrush during cold-start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4148UB | Higher screening level (JANTXV vs JAN); tighter parametric limits and extended temperature testing | Required for Class S spaceflight hardware where single-event burnout immunity is mandated | Select JANTXV1N4148UB only when mission-critical radiation hardness and lot acceptance test reports are contractually required |
| 1N4148UR-1 (MELF) | MELF glass package instead of ceramic UB; higher mechanical robustness but larger footprint and no polarity variants | Suitable for commercial/industrial PCBs where automated optical inspection favors cylindrical MELF form factor | Choose 1N4148UR-1 when board-level reflow yield and visual solder joint inspection outweigh military qualification needs |
Compared with JAN1N4148UB, JANTXV1N4148UB adds radiation tolerance and tighter trr/VF binning at higher cost, while 1N4148UR-1 trades military qualification for MELF manufacturability and broader commercial availability.
Availability
JAN1N4148UB is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T clamping, and high-temperature sensor signal conditioning requiring stable component supply across long-lifecycle defense and industrial programs.
Supply support for JAN1N4148UB 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 JAN1N4148UB belongs to Microsemi's military-qualified discrete diode product line, engineered specifically for extreme-environment signal integrity and transient resilience in avionics, radar, and downhole instrumentation.
FAQ
What is the qualified reliability level for JAN1N4148UB?
JAN1N4148UB is qualified to MIL-PRF-19500/116 at JAN level, including full lot traceability, extended temperature screening (−65 °C to +200 °C), and conformance to military burn-in and life-test requirements. This certification applies specifically to the JAN1N4148UB variant - not commercial 1N4148 derivatives - and is documented in Microsemi T4-LDS-0281-2 Rev. 1.
Does JAN1N4148UB support common cathode configuration?
Yes, JAN1N4148UB is available in common cathode (CC) polarity per its part nomenclature system. The CC variant integrates two diodes sharing a single cathode terminal in the same ceramic UB package, enabling compact dual-channel clamping without external parallel wiring. This configuration is explicitly listed in the "Part Nomenclature" section of the JAN1N4148UB datasheet.
What is the thermal resistance junction-to-solder pad for JAN1N4148UB?
The thermal resistance junction-to-solder pad (RӨJSP) for JAN1N4148UB is 120 °C/W, measured under standard JEDEC test conditions. This value reflects the direct thermal path from the silicon die through the ceramic package base to the PCB copper pad, and is critical for calculating junction temperature rise in high-density layouts where ambient convection cooling is limited.
How does the capacitance of JAN1N4148UB affect high-speed signal integrity?
JAN1N4148UB exhibits 4.0 pF capacitance at 0 V bias (1 MHz), which minimizes loading on high-speed lines like RS-422 and Ethernet 10 Base-T. At 10 MHz, this adds <1 Ω reactance in parallel with 100 Ω differential impedance, preserving signal fidelity and reducing jitter - a key advantage over higher-capacitance alternatives in timing-critical interfaces.
Is JAN1N4148UB RoHS compliant?
Yes, JAN1N4148UB is RoHS compliant by design, meeting Directive 2011/65/EU requirements for lead-free solderability and restricted substance content. Compliance is achieved via gold-plated nickel terminations and ceramic body materials - confirmed in the "Features" section of the official Microsemi datasheet T4-LDS-0281-2.
JAN1N4148UB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 3-SMD, No Lead
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- 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):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 75 µA @ 75 V
- Capacitance @ Vr, F:
- 4pF @ 0V, 1MHz
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/116
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- UB
- Operating Temperature - Junction:
- -65°C ~ 200°C
JAN1N4148UB FAQ
1.How can I place an order for JAN1N4148UB through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4148UB 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 JAN1N4148UB reliable?
The price and inventory of JAN1N4148UB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4148UB is usually 5 days.
3.What payment methods are accepted for JAN1N4148UB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4148UB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4148UB?
JAN1N4148UB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4148UB 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 JAN1N4148UB?
For technical support, including JAN1N4148UB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4148UB requirements.
6.How does Aetrix verify that JAN1N4148UB is sourced from the original manufacturer or authorized distributors?
All JAN1N4148UB 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 JAN1N4148UB meets industry standards.
7.What is the process for return or replacement of JAN1N4148UB?
All JAN1N4148UB units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4148UB, 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 JAN1N4148UB part is unused and in its original packaging.
Return procedure for JAN1N4148UB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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