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Microchip Technology JANTX1N4148UB2R/TR
- Part No.:
- JANTX1N4148UB2R/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Diodes
- Package:
- 2-SMD, No Lead
- Datasheet:
-
JANTX1N4148UB2R/TR.pdf
- Description:
- SIGNAL OR COMPUTER DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:4,868
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Product details
Overview
JANTX1N4148UB2R/TR from Microsemi is a military-qualified surface-mount switching diode in the UB2 ceramic package, featuring 75 V peak reverse voltage, 200 mA average forward current, and 5 ns reverse recovery time. It serves as a high-speed signal routing and clamping device in RS-232 interfaces, Ethernet 10 Base-T receivers, and low-profile military avionics power sequencing circuits.
For engineers reviewing the JANTX1N4148UB2R/TR datasheet, JANTX1N4148UB2R/TR pinout, JANTX1N4148UB2R/TR application, or JANTX1N4148UB2R/TR equivalent, key selection criteria include MIL-PRF-19500/116 JANTX qualification level, ceramic UB2 package thermal resistance (120 °C/W junction-to-solder pad), unidirectional polarity, and 4.0 pF capacitance at 0 V bias.
Technical Context
This diode operates as a unidirectional silicon switching device with a ceramic hermetic UB2 surface-mount package. Its 5 ns reverse recovery time and 0.8 V forward voltage at 10 mA enable reliable high-frequency signal steering in digital logic interfaces and transient suppression networks.
The JANTX1N4148UB2R/TR meets MIL-PRF-19500/116 requirements for JANTX-level reliability, with -65 °C to +200 °C operating temperature range and gold-plated nickel terminals. Its 2.92–3.25 mm body length and 2.16–2.74 mm width conform to standardized ceramic SMD footprint dimensions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Reverse Voltage | 75 V - 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 circuits |
| Forward Voltage @ 10 mA | 0.8 V - Low conduction loss in low-power logic interface level-shifting paths |
| Junction Temperature Range | -65 °C to +200 °C - Supports deployment in aerospace engine control units and downhole instrumentation |
| Capacitance @ 0 V | 4.0 pF - Minimizes signal distortion on high-speed serial lines such as RS-422 |
| Average Forward Current | 200 mA @ TA = 75 °C - Sustains continuous operation in moderate-duty detector and sample-hold circuits |
| Junction-to-Solder Pad Rθ | 120 °C/W - Allows direct thermal coupling to PCB copper for improved power dissipation in compact layouts |
Pinout & Package
Ceramic UB2 surface-mount package: 2-pin, unidirectional configuration, gold-plated nickel terminals, < 0.04 g mass, dimensions 2.92–3.25 mm × 2.16–2.74 mm × 1.17–1.42 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pad 1 | Anode | Forward current entry point; connects to positive-side signal or supply rail in clamp/detector configurations |
| Pad 2 | Cathode | Forward current exit point; ties to reference ground or logic-low node for fast turn-off behavior |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/116 JANTX qualification | Validated reliability for defense electronics requiring extended lifetime under thermal cycling and vibration |
| Ceramic hermetic UB2 package | Hermetic seal prevents moisture ingress and enables operation at 200 °C junction temperature |
| 5 ns reverse recovery time | Supports clean edge transitions in >50 MHz clock distribution and pulse shaping networks |
| 4.0 pF junction capacitance | Reduces loading on high-impedance RF detector inputs and analog multiplexer outputs |
| Gold-plated nickel terminations | Ensures solderability and intermetallic stability across multiple reflow cycles in automated assembly |
Applications
| RS-232 Line Protection | Ethernet 10 Base-T Receiver Clamping |
|---|---|
Use Scenario: Protecting UART transceivers from ESD and line-induced transients in ruggedized industrial terminals. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between TX/RX lines and ground to shunt overvoltage events. Use Value: 75 V working peak reverse voltage and 5 ns recovery prevent latch-up during ±15 kV contact discharge per IEC 61000-4-2. | Use Scenario: Limiting differential-mode surges on twisted-pair Ethernet PHY inputs in network switches. IC Role / Device Role / Timing Role: Signal-line transient suppressor connected anode-to-cathode across differential pairs. Use Value: 4.0 pF capacitance avoids signal integrity degradation at 10 Mbps while maintaining fast response to fast-rising transients. |
| Aerospace Power Sequencing | High-Frequency Detector Circuits |
Use Scenario: Enabling controlled startup sequencing of dual-supply FPGAs in satellite payload controllers. IC Role / Device Role / Timing Role: Isolation diode in discrete OR-ing and hold-up timing networks. Use Value: -65 °C to +200 °C junction rating supports operation near propulsion systems without derating. | Use Scenario: Demodulating AM signals in HF communication front-ends for tactical radios. IC Role / Device Role / Timing Role: Envelope detector element in passive peak-detect configurations. Use Value: 0.8 V forward voltage at 10 mA ensures minimal detection threshold offset in low-amplitude RF envelopes. |
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 | Commercial-grade, SOD-123 package, 100 V V(BR), 4 ns trr, RoHS-compliant but not MIL-qualified | Lacks JANTX reliability screening and ceramic hermeticity; unsuitable for flight-critical systems | Select when cost-sensitive commercial designs require fast switching without military certification |
| JANTXV1N4148UB2R/TR | JANTXV qualification level, tighter parametric limits, enhanced screening including burn-in and radiation testing | Required for space-grade and nuclear-hardened applications where failure modes must be statistically bounded | Select when mission-critical redundancy or total ionizing dose tolerance >100 krad(Si) is mandated |
Compared with JANTX1N4148UB2R/TR, the 1N4148W-7-F offers faster trr but no military qualification, while JANTXV1N4148UB2R/TR adds radiation hardness and extended life testing-making the original JANTX grade optimal for field-deployed defense electronics balancing performance and qualification rigor.
Availability
JANTX1N4148UB2R/TR is available at Aetrix Electronics and suitable for RS-232 interface protection, Ethernet 10 Base-T receiver clamping, and aerospace power sequencing requiring stable component supply across extended production lifecycles.
Supply support for JANTX1N4148UB2R/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 JANTX1N4148UB2R/TR belongs to Microsemi's military diode product line, engineered specifically for high-speed signal integrity and environmental robustness in mission-critical electronic systems.
FAQ
What is the qualified reliability level for JANTX1N4148UB2R/TR?
JANTX1N4148UB2R/TR is qualified to MIL-PRF-19500/116 at the JANTX level, which includes rigorous screening for temperature cycling, mechanical shock, vibration, and steady-state life testing. This qualification ensures suitability for high-reliability military and aerospace applications where long-term operational stability is mandatory. The JANTX1N4148UB2R/TR undergoes lot acceptance testing per MIL-STD-750 and is traceable to individual wafer lots.
Does JANTX1N4148UB2R/TR have a common cathode or common anode configuration?
JANTX1N4148UB2R/TR is a unidirectional switching diode with standard anode–cathode polarity-no internal common node structure. The part nomenclature confirms "blank" polarity designation, meaning it is not configured as common anode (CA), common cathode (CC), or doubler (D). Its two-terminal UB2 package contains only one PN junction oriented for single-direction conduction, verified in the Electrical Characteristics table and package marking convention.
What is the thermal resistance from junction to solder pad for JANTX1N4148UB2R/TR?
The junction-to-solder pad thermal resistance (RθJSP) for JANTX1N4148UB2R/TR is 120 °C/W, as specified in the Maximum Ratings table. This value reflects direct thermal conduction from the die to the PCB solder pad through the ceramic package base, enabling effective heat dissipation in compact layouts without heatsinks. It is measured under defined test conditions per MIL-STD-750 Method 1071 and applies to standard FR-4 boards with ≥1 oz copper on the mounting layer.
Can JANTX1N4148UB2R/TR replace commercial 1N4148 variants in existing designs?
JANTX1N4148UB2R/TR can functionally replace commercial 1N4148 diodes in most signal-switching roles, but its ceramic UB2 package has different footprint and soldering requirements than DO-35 or SOD-123 packages. Electrical parameters-including 5 ns trr, 0.8 V VF, and 4.0 pF C-are closely matched, but designers must verify PCB land pattern compatibility, reflow profile adjustments for ceramic thermal mass, and compliance documentation needs before substitution. JANTX1N4148UB2R/TR is not a drop-in replacement without layout review.
What is the maximum operating temperature for JANTX1N4148UB2R/TR?
JANTX1N4148UB2R/TR has a specified junction and storage temperature range of -65 °C to +200 °C, per MIL-PRF-19500/116. This allows operation in extreme environments such as jet engine bays, downhole oil/gas tools, and space vehicle thermal radiators. Derating curves in Figure 1 confirm 200 mA average forward current is maintained up to 75 °C ambient, with linear reduction to zero at 150 °C ambient-ensuring predictable performance across the full rated range.
JANTX1N4148UB2R/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 2-SMD, No Lead
- Packaging:
- Tape & Reel (TR)
- 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:
- UB2
- Operating Temperature - Junction:
- -65°C ~ 200°C
JANTX1N4148UB2R/TR FAQ
1.How can I place an order for JANTX1N4148UB2R/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4148UB2R/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 JANTX1N4148UB2R/TR reliable?
The price and inventory of JANTX1N4148UB2R/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4148UB2R/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4148UB2R/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4148UB2R/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4148UB2R/TR?
JANTX1N4148UB2R/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4148UB2R/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 JANTX1N4148UB2R/TR?
For technical support, including JANTX1N4148UB2R/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4148UB2R/TR requirements.
6.How does Aetrix verify that JANTX1N4148UB2R/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4148UB2R/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 JANTX1N4148UB2R/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4148UB2R/TR?
All JANTX1N4148UB2R/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4148UB2R/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 JANTX1N4148UB2R/TR part is unused and in its original packaging.
Return procedure for JANTX1N4148UB2R/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTX1N4148UB2R/TR Tags
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1N4448X-TP
Micro Commercial Co
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1N4148WX-TP
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1N4148TR
onsemi
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MMSD4148T1G
onsemi
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MMBD914LT3G
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BAS16HT1G
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1N914BWT
onsemi
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BAS21LT1G
onsemi
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LL4148
onsemi
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BAS16LT1G
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MMSD914T1G
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BAV21W-7-F
Diodes Incorporated
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