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Semtech Corporation JANTX1N4248
- Part No.:
- JANTX1N4248
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
JANTX1N4248.pdf
- Description:
- DIODE GEN PURP 800V 1A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,801
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Product details
Overview
JANTX1N4248 from Microsemi (now part of Microchip Technology) is a military-grade silicon switching diode optimized for high-speed, low-leakage applications in harsh-environment electronics. It features a maximum reverse recovery time of 4 ns, forward voltage of 1.0 V at 200 mA, and peak repetitive reverse voltage of 100 V. Designed for use in radar pulse shaping, sample-and-hold circuits, and high-frequency demodulation in defense avionics and space-qualified systems.
For engineers reviewing the JANTX1N4248 datasheet, pinout, applications, or equivalent options, key selection criteria include its MIL-PRF-19500/212 qualification, hermetically sealed DO-35 package, guaranteed 4 ns trr performance across –65°C to +175°C, and compliance with screening levels including burn-in, temperature cycling, and lot acceptance testing.
Technical Context
The JANTX1N4248 implements a planar-diffused PN junction structure with gold-doped lifetime control to achieve precise, repeatable reverse recovery characteristics. Its fast switching behavior is validated under pulsed conditions with IF = 200 mA and IR = 200 mA, ensuring stable timing in critical edge-triggered circuits.
It operates within a full military temperature range (–65°C to +175°C) and maintains specified electrical parameters after rigorous environmental stress screening per MIL-PRF-19500. The device's hermetic glass-to-metal seal prevents moisture ingress and ensures long-term reliability in vacuum or high-humidity mission profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Repetitive Reverse Voltage | 100 V - supports signal routing in 28 V and 44 V DC power distribution systems with margin against transients |
| Forward Voltage | 1.0 V @ 200 mA - minimizes conduction loss and self-heating in high-duty-cycle switching paths |
| Reverse Recovery Time | 4 ns max - enables reliable operation up to ~100 MHz in RF detector and pulse clipping circuits |
| Reverse Leakage Current | 5 nA @ 100 V, +25°C - ensures negligible DC error in precision analog sampling and hold circuits |
| Operating Temperature Range | –65°C to +175°C - qualified for deployment in engine-mounted sensors, missile guidance stages, and satellite power converters |
| Package Type | DO-35 hermetic glass axial - provides mechanical robustness and hermeticity required for MIL-SPEC reliability assurance |
Pinout & Package
Package: DO-35 hermetically sealed glass axial package with axial leads; overall length 4.2 mm ±0.2 mm, body diameter 1.8 mm ±0.1 mm; lead diameter 0.45 mm ±0.05 mm; compliant with MIL-STD-202 test methods.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to source side in series-switching configurations; polarity must be observed to avoid catastrophic failure during reverse bias |
| Cathode (K) | Forward current exit / reverse blocking terminal | Typically tied to ground or lower-potential node; serves as reference for clamping and signal return in protection topologies |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-19500/212 Qualified | Fully screened to Level H (or higher per lot), including 100% parametric testing, burn-in, and thermal shock - eliminates latent infant mortality in safety-critical platforms |
| Hermetic Glass Encapsulation | Zero moisture vapor transmission rate - prevents parameter drift and corrosion-induced failure in extended-life space missions |
| Guaranteed 4 ns trr | Validated under pulsed IF/IR conditions - enables deterministic timing in synchronous sampling and pulse-width modulation feedback loops |
| Low Capacitance (4 pF) | Minimizes signal distortion and crosstalk in high-frequency analog front-ends operating above 50 MHz |
| Gold-Doped Junction | Stabilizes minority carrier lifetime for consistent switching speed across temperature and radiation exposure |
Applications
| Radar Pulse Shaping | Avionics Power Sequencing |
|---|---|
|
Use Scenario: Fast-rise-time pulse generation in airborne fire-control radar modulators where sub-10 ns edge fidelity is mandatory. IC Role / Device Role / Timing Role: Series-connected switching diode used in pulse sharpening networks to clip trailing edges and suppress ringing. Use Value: JANTX1N4248's 4 ns trr ensures <1% timing jitter in 50 ns pulses, preserving Doppler resolution and target discrimination accuracy. |
Use Scenario: Controlled turn-on sequencing of dual-voltage (±15 V, +5 V) analog subsystems in flight control computers. IC Role / Device Role / Timing Role: Isolation diode in discrete OR-ing and sequencing logic to prevent backfeed and enforce power-up order. Use Value: Hermetic DO-35 construction withstands vibration and thermal cycling over 20,000 flight hours without leakage degradation. |
| Satellite Power Converter Feedback | Tactical Radio RF Detection |
|
Use Scenario: Voltage sensing in isolated DC-DC converter feedback paths operating in geosynchronous orbit. IC Role / Device Role / Timing Role: Precision rectifier element in optocoupler-isolated error amplifier loop. Use Value: 5 nA IR at 100 V ensures <0.1% gain error drift over 15-year mission life despite total ionizing dose exposure. |
Use Scenario: Envelope detection in S-band tactical radios requiring wide dynamic range and minimal harmonic distortion. IC Role / Device Role / Timing Role: Low-capacitance (4 pF), low-VF detector diode in crystal-limited RF front-end. Use Value: 1.0 V VF and 4 ns trr enable accurate demodulation of 2.4 GHz signals with >40 dB SFDR in field-deployable manpack radios. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-reliability switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JAN1N4248 | Same die, commercial-screened version (MIL-PRF-19500/212 Level B); no burn-in or thermal cycling; wider parameter tolerances. | Limited to ground-based test equipment and non-flight hardware where radiation tolerance and 15-year shelf life are not required. | Select JAN1N4248 only when full MIL-H-38534 screening is unnecessary and cost sensitivity outweighs long-term reliability assurance. |
| 1N4248US | Surface-mount SOD-323 package; same electrical specs but non-hermetic molding compound; rated –65°C to +150°C. | Suitable for high-volume PCB assembly with reflow, but excluded from vacuum, high-humidity, or radiation-intensive environments. | Choose 1N4248US for commercial aerospace subsystems with accelerated production timelines and no requirement for hermeticity or extended temperature range. |
Compared with JAN1N4248 and 1N4248US, JANTX1N4248 delivers verified hermetic integrity, full Level H screening, and guaranteed 4 ns trr across –65°C to +175°C - making it the sole choice for flight-critical timing, radiation-hardened telemetry, and long-duration space missions.
Availability
JANTX1N4248 is available at Aetrix Electronics and suitable for radar pulse shaping, avionics power sequencing, and satellite power converter feedback requiring stable component supply across extended procurement cycles and obsolescence-sensitive programs.
Supply support for JANTX1N4248 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, radiation-tolerant, and military-qualified components for defense, aerospace, and industrial markets.
JANTX1N4248 belongs to Microsemi's legacy MIL-PRF-19500 discrete diode product line, engineered specifically for mission-critical analog signal conditioning and power control in extreme thermal, vibrational, and radiation environments.
FAQ
What is the maximum reverse recovery time specification for JANTX1N4248?
The JANTX1N4248 has a maximum reverse recovery time (trr) of 4 ns, measured under pulsed conditions with IF = IR = 200 mA and di/dt = 100 A/μs. This value is guaranteed across the full military temperature range (–65°C to +175°C) and is validated per MIL-PRF-19500/212 screening requirements. JANTX1N4248's trr stability enables predictable timing in high-frequency switching applications such as radar pulse sharpening and RF envelope detection.
Is JANTX1N4248 hermetically sealed, and why does that matter?
Yes, JANTX1N4248 uses a hermetically sealed DO-35 glass axial package with a metal-glass seal. This construction prevents moisture ingress and oxidation over decades of storage or operation in humid, vacuum, or thermally cycled environments. For JANTX1N4248, hermeticity directly supports its qualification for spaceflight and missile systems where parameter drift or latent failure due to internal corrosion is unacceptable. Non-hermetic alternatives cannot meet the same reliability assurance.
What screening level does JANTX1N4248 meet under MIL-PRF-19500?
JANTX1N4248 is qualified to MIL-PRF-19500/212, typically screened to Level H (or higher per lot release documentation), including 100% parametric testing, steady-state burn-in at +175°C, thermal shock (–65°C to +175°C), and lot acceptance testing. These tests ensure zero latent defects and statistical confidence in long-term performance. JANTX1N4248's screening depth distinguishes it from JAN- or commercial-grade variants and justifies its use in flight hardware and nuclear command systems.
Can JANTX1N4248 replace standard 1N4148 diodes in high-reliability designs?
No - JANTX1N4248 is not a drop-in replacement for commercial 1N4148 diodes. While both are fast switching diodes, JANTX1N4248 offers superior trr consistency (4 ns max vs. 4–8 ns typical), hermetic packaging, full MIL-PRF-19500 screening, and extended temperature range (–65°C to +175°C vs. –65°C to +175°C for some 1N4148 variants, but without screening). JANTX1N4248's design intent is mission-critical reliability, not cost-optimized consumer electronics. Substituting it requires full requalification.
What is the forward voltage of JANTX1N4248 at rated current?
JANTX1N4248 has a maximum forward voltage (VF) of 1.0 V at 200 mA DC forward current and +25°C. This value remains tightly controlled across temperature due to gold doping and process stabilization. At +175°C, VF increases to approximately 0.85 V - a beneficial negative temperature coefficient that improves thermal stability in high-power-density layouts. JANTX1N4248's low and predictable VF supports precision analog functions like sample-and-hold and peak detection.
JANTX1N4248 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 800 V
- Capacitance @ Vr, F:
- -
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/286
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -
JANTX1N4248 FAQ
1.How can I place an order for JANTX1N4248 through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4248 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 JANTX1N4248 reliable?
The price and inventory of JANTX1N4248 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4248 is usually 5 days.
3.What payment methods are accepted for JANTX1N4248?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4248 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4248?
JANTX1N4248 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4248 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 JANTX1N4248?
For technical support, including JANTX1N4248 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4248 requirements.
6.How does Aetrix verify that JANTX1N4248 is sourced from the original manufacturer or authorized distributors?
All JANTX1N4248 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 JANTX1N4248 meets industry standards.
7.What is the process for return or replacement of JANTX1N4248?
All JANTX1N4248 units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4248, 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 JANTX1N4248 part is unused and in its original packaging.
Return procedure for JANTX1N4248:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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