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Microchip Technology JAN1N4148UB/TR
- Part No.:
- JAN1N4148UB/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- 3-SMD, No Lead
- Datasheet:
-
JAN1N4148UB/TR.pdf
- Description:
- SIGNAL OR COMPUTER DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:7,501
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Product details
Overview
JAN1N4148UB/TR 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 interfaces and Ethernet 10 Base-T data line protection.
For engineers reviewing the JAN1N4148UB/TR datasheet, JAN1N4148UB/TR pinout, JAN1N4148UB/TR application, or JAN1N4148UB/TR equivalent, key selection criteria include MIL-PRF-19500/116 JAN-level qualification, low 4.0 pF capacitance at 0 V, 75 V working peak reverse voltage, and ceramic-packaged thermal robustness for aerospace and defense signal routing.
Technical Context
This diode implements a planar-diffused silicon junction optimized for fast unidirectional switching in signal-path applications. Its ceramic UB package provides hermetic sealing and low parasitic capacitance, supporting stable performance under thermal cycling and radiation exposure.
The device operates with minimal reverse recovery charge (Qrr inferred from trr = 5 ns and IF = 10 mA), delivers <25 nA reverse leakage at 20 V and 25 °C, and maintains rated current derating up to 75 °C ambient per Figure 1 - enabling use in compact, high-reliability interface circuits without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage | 100 V - withstands transient overvoltage spikes up to rated limit without avalanche conduction. |
| Reverse Recovery Time | 5 ns - enables clean switching in >10 MHz digital signal paths with minimal timing distortion. |
| Forward Voltage | 0.8 V @ 10 mA - ensures low power loss and minimal voltage drop in logic-level clamping circuits. |
| Junction Temperature Range | –65 °C to +200 °C - supports operation in extreme environments including avionics and downhole electronics. |
| Capacitance | 4.0 pF @ 0 V - preserves signal integrity on high-speed data lines such as RS-422 and Ethernet PHY interfaces. |
| Working Peak Reverse Voltage | 75 V - defines maximum continuous reverse bias in DC-coupled signal conditioning networks. |
| Average Forward Current | 200 mA @ TA = 75 °C - sets usable current capacity in thermally constrained PCB layouts. |
Pinout & Package
Ceramic UB surface-mount package: two-terminal, unidirectional configuration, gold-plated nickel terminals, hermetically sealed, weight <0.04 g. Dimensions per MIL-PRF-19500/116: BL = 0.115–0.128 in, BW = 0.085–0.108 in, BH = 0.046–0.056 in.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential signal node during conduction; polarity-marked on top surface. |
| Cathode | Forward current exit point | Connected to lower-potential reference (e.g., ground or return line); marked with band or dot. |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/116 JAN qualification | Meets screening, testing, and traceability requirements for Class S space and defense systems. |
| Ceramic hermetic packaging | Eliminates moisture ingress and long-term parameter drift in humid or corrosive operational environments. |
| Low 4.0 pF junction capacitance | Minimizes capacitive loading on >10 MHz clock and data signals, preserving edge rate and eye diagram integrity. |
| 5 ns reverse recovery time | Reduces switching-induced ringing and cross-talk in bidirectional bus termination and level-shifting networks. |
| RoHS-compliant by design | Contains no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE - compliant with EU Directive 2011/65/EU. |
Applications
| RS-232 Interface Protection | Ethernet 10 Base-T Signal Clamping |
|---|---|
Use Scenario: Protecting UART transceivers against ESD and line transients in ruggedized serial communication ports. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between TX/RX lines and chassis ground. Use Value: Leverages 100 V breakdown and 5 ns recovery to suppress ±15 kV HBM ESD events without latch-up or degradation. | Use Scenario: Limiting differential signal swing on twisted-pair Ethernet PHY outputs to prevent receiver saturation. IC Role / Device Role / Timing Role: Fast-switching signal limiter in 10 Mbps Manchester-encoded baseband channels. Use Value: 4.0 pF capacitance avoids bandwidth reduction; 0.8 V forward drop enables precise voltage thresholding. |
| Avionics Data Bus Termination | Downhole Sensor Signal Conditioning |
Use Scenario: Providing controlled termination impedance and transient suppression on ARINC 429 or MIL-STD-1553B stubs. IC Role / Device Role / Timing Role: High-reliability switching element in dual-diode termination networks. Use Value: –65 °C to +200 °C rating ensures functionality across aircraft cabin-to-engine bay temperature gradients. | Use Scenario: Isolating analog sensor outputs in oil/gas wellhead monitoring systems exposed to high ambient heat. IC Role / Device Role / Timing Role: Reverse-biased blocking diode in 4–20 mA loop protection circuitry. Use Value: Ceramic package withstands thermal shock during rapid pressure/temperature cycling; 75 V VRWM matches industrial loop supply headroom. |
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 life testing. | Required for mission-critical flight control subsystems where failure probability must be <10−9/hour. | Select when full JANTXV qualification per MIL-PRF-19500/116 is mandated by system specification. |
| 1N4148UR-1 (MELF) | Same die in DO-213AA glass MELF package; RθJA = 400 °C/W vs 325 °C/W; no hermetic seal. | Suitable for commercial/industrial boards where cost and solderability outweigh hermeticity needs. | Choose for automated optical inspection compatibility and lower assembly cost - not for vacuum or high-humidity deployment. |
Compared with JAN1N4148UB/TR, JANTXV1N4148UB offers enhanced reliability screening for safety-critical functions, while 1N4148UR-1 trades hermeticity and thermal resistance for lower cost and MELF handling advantages in non-military production.
Availability
JAN1N4148UB/TR is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T signal clamping, and avionics data bus termination requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for JAN1N4148UB/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 JAN1N4148UB/TR belongs to Microsemi's military-grade discrete diode product line, engineered specifically for signal integrity and survivability in harsh-environment electronic systems.
FAQ
What does the "JAN" prefix signify for JAN1N4148UB/TR?
The "JAN" prefix indicates compliance with MIL-PRF-19500/116 Level S requirements, including rigorous environmental stress screening, lot traceability, and extended temperature validation. JAN1N4148UB/TR is fully qualified for use in defense and space applications where commercial-grade components are prohibited. Each JAN1N4148UB/TR unit carries full test documentation and manufacturer certification per military specification.
Is JAN1N4148UB/TR RoHS compliant?
Yes, JAN1N4148UB/TR is RoHS-compliant by design per EU Directive 2011/65/EU, containing no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE. This compliance is maintained without compromising MIL-PRF-19500/116 qualification - verified through material analysis and process control records documented in Microsemi's T4-LDS-0281-2 datasheet revision.
What is the thermal resistance of JAN1N4148UB/TR, and how does it affect layout?
JAN1N4148UB/TR has a junction-to-ambient thermal resistance (RθJA) of 325 °C/W and junction-to-solder-pad resistance (RθJSP) of 120 °C/W. These values require direct thermal connection to copper pour or thermal vias beneath the ceramic package to sustain 200 mA average current at 75 °C ambient. Layouts must avoid isolation rings and maximize pad copper area per Figure 2 in the official datasheet.
Can JAN1N4148UB/TR replace standard 1N4148 in commercial designs?
JAN1N4148UB/TR is electrically compatible with JEDEC 1N4148 but exceeds its specifications in temperature range (–65 °C to +200 °C vs –65 °C to +175 °C), screening rigor, and hermeticity. It may be substituted in commercial designs where enhanced reliability or extended temperature margin is needed - though cost and availability differ. Always verify mechanical fit and solder profile compatibility with the ceramic UB footprint.
What polarity configuration does JAN1N4148UB/TR use?
JAN1N4148UB/TR is supplied in the unidirectional polarity configuration, as indicated by the blank suffix in its nomenclature (per T4-LDS-0281-2 part numbering table). It features one anode and one cathode terminal, with cathode identified by marking on the ceramic body. Common anode (CA), common cathode (CC), and doubler variants exist but are distinct orderable parts - not interchangeable with JAN1N4148UB/TR.
JAN1N4148UB/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 3-SMD, No Lead
- Packaging:
- Tape & Reel (TR)
- 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):
- 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:
- UB
- Operating Temperature - Junction:
- -65°C ~ 200°C
JAN1N4148UB/TR FAQ
1.How can I place an order for JAN1N4148UB/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JAN1N4148UB/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 JAN1N4148UB/TR reliable?
The price and inventory of JAN1N4148UB/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JAN1N4148UB/TR is usually 5 days.
3.What payment methods are accepted for JAN1N4148UB/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JAN1N4148UB/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JAN1N4148UB/TR?
JAN1N4148UB/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JAN1N4148UB/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 JAN1N4148UB/TR?
For technical support, including JAN1N4148UB/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JAN1N4148UB/TR requirements.
6.How does Aetrix verify that JAN1N4148UB/TR is sourced from the original manufacturer or authorized distributors?
All JAN1N4148UB/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 JAN1N4148UB/TR meets industry standards.
7.What is the process for return or replacement of JAN1N4148UB/TR?
All JAN1N4148UB/TR units undergo pre-shipment inspection (PSI). If there is an issue with JAN1N4148UB/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 JAN1N4148UB/TR part is unused and in its original packaging.
Return procedure for JAN1N4148UB/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JAN1N4148UB/TR Tags
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