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Microchip Technology JANTXV1N4972DUS/TR
- Part No.:
- JANTXV1N4972DUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4972DUS/TR.pdf
- Description:
- DIODE ZENER 39V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:8,407
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Product details
Overview
JANTXV1N4972DUS/TR from Microsemi is a hermetically sealed, voidless-glass surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature, with nominal Zener voltage of 39 V ±5%, dynamic impedance of 14 Ω at 30 mA test current, and maximum reverse leakage of 2 μA at 29.7 V. It serves as a precision voltage reference and overvoltage clamp in high-reliability military avionics power conditioning circuits.
For engineers reviewing the JANTXV1N4972DUS/TR datasheet, JANTXV1N4972DUS/TR pinout, JANTXV1N4972DUS/TR application, or JANTXV1N4972DUS/TR equivalent, key selection criteria include its MIL-PRF-19500/356 qualification, −65 °C to +175 °C operating temperature range, 7 °C/W junction-to-end-cap thermal resistance, and Category I metallurgical bond construction.
Technical Context
This device operates in reverse breakdown mode to maintain stable voltage regulation across wide current (10%–50% of IZM) and temperature ranges. Its voidless-glass hermetic seal and triple-layer passivation ensure immunity to moisture ingress and long-term parametric stability under thermal cycling.
The JANTXV1N4972DUS/TR uses an internal tungsten slug structure with copper end caps and Sn/Pb termination, enabling robust solder joint integrity and ESD insensitivity per MIL-STD-750 Method 1020. Its 39 V Zener voltage exhibits a temperature coefficient of +0.095 %/°C, supporting predictable drift compensation in analog reference designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 39 V ±5% at 30 mA - defines regulated output voltage with tight tolerance for reference accuracy |
| Power Dissipation | 5 W @ TEC = 140 °C - sets maximum continuous thermal load without derating in conduction-cooled layouts |
| Dynamic Impedance ZZ | 14 Ω @ IZT = 30 mA - determines output voltage variation under load transients |
| Reverse Leakage IR | 2 μA @ VR = 29.7 V - ensures minimal quiescent current draw in standby or low-power modes |
| Thermal Resistance θJC | 7 °C/W junction-to-end-cap - enables direct thermal path to PCB copper or heatsink for high-reliability thermal management |
| Operating Temperature | −65 °C to +175 °C - supports deployment in aerospace, downhole, and defense systems with extreme ambient exposure |
| Surge Current IZSM | 4.0 A @ 8.3 ms - withstands short-duration line transients without degradation in protection circuits |
Pinout & Package
Package: Hermetically sealed voidless glass "E" package (also designated D-5B), with cathode indicated by band; copper end caps with Sn/Pb finish; weight 539 mg; tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side reference node | Connected to system ground or lower potential rail during Zener operation |
| Cathode | Regulated output terminal / high-side reference node | Banded end; supplies stable 39 V to load when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture-induced parameter shift and corrosion failure over 20+ year field life |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycle survivability exceeding 1000 cycles between −65 °C and +175 °C |
| MIL-PRF-19500/356 qualification | Validates performance to military screening levels including burn-in, temperature cycling, and lot acceptance testing |
| Nonsensitive to ESD | Withstands >4 kV HBM without parameter shift-eliminates need for external ESD protection in board layout |
| Triple-layer passivation | Blocks ion migration and surface contamination, maintaining Zener voltage stability in high-humidity environments |
Applications
| Aerospace Power Bus Regulation | Military Radar Bias Supply |
|---|---|
|
Use Scenario: Stabilizing 39 V bias rail for GaN RF amplifier stages in airborne radar transceivers exposed to −55 °C to +70 °C ambient. IC Role / Device Role / Timing Role: Zener diode acting as primary shunt regulator and overvoltage clamp for sensitive RF front-end circuitry. Use Value: Maintains <±0.5% output voltage deviation across full temperature range and 10–100 mA load current, preventing amplifier gain collapse. |
Use Scenario: Providing reference voltage for analog-to-digital converter (ADC) input scaling in missile guidance inertial measurement units. IC Role / Device Role / Timing Role: Precision voltage reference source with known temperature coefficient for ADC full-scale calibration. Use Value: Enables 12-bit effective resolution via predictable +0.095%/°C drift compensation in firmware-based calibration algorithms. |
| Satellite Solar Array Monitor | Nuclear Plant Control System |
|
Use Scenario: Clamping telemetry signal conditioning circuitry against electrostatic discharge events during satellite deployment in LEO orbit. IC Role / Device Role / Timing Role: Transient voltage suppressor protecting op-amp inputs in solar panel current sensing amplifiers. Use Value: Absorbs 4.0 A surge at 8.3 ms without degradation, preserving signal integrity during launch vibration-induced ESD. |
Use Scenario: Regulating auxiliary 39 V supply for redundant PLC I/O modules in Class 1E safety-critical nuclear instrumentation channels. IC Role / Device Role / Timing Role: Fail-safe voltage regulator ensuring uninterrupted operation during grid fault conditions. Use Value: Delivers 5 W continuous power with zero latent defects after 1000-hour burn-in, meeting IEEE 344 seismic survivability requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4972US | No TR suffix; bulk packaging instead of tape-and-reel; identical electrical specs and hermetic construction | Preferred for manual prototyping or low-volume hand-soldered assemblies where reel handling is unnecessary | Select JANTXV1N4972US when automated SMT placement is not required and cost-per-unit is prioritized over logistics convenience |
| 1N4972US | Commercial-grade (non-military) version; same Zener voltage and package but lacks MIL-PRF-19500/356 screening and extended temperature validation | Suitable for industrial test equipment or non-safety-critical embedded systems with −55 °C to +125 °C operating envelope | Choose 1N4972US only when radiation hardness, ESD immunity, and 175 °C capability are not design requirements |
Compared with JANTXV1N4972US and 1N4972US, the JANTXV1N4972DUS/TR provides guaranteed tape-and-reel delivery for high-volume SMT lines while retaining full military screening and extended temperature performance-critical for aerospace production programs requiring traceable, lot-controlled components.
Availability
JANTXV1N4972DUS/TR is available at Aetrix Electronics and suitable for aerospace power regulation, military radar biasing, and nuclear plant control systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for JANTXV1N4972DUS/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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for defense, aerospace, and industrial markets.
The JANTXV1N4972DUS/TR belongs to Microsemi's military-qualified Zener diode product line, engineered specifically for fail-operational voltage regulation in mission-critical systems where parameter stability and hermetic reliability are non-negotiable.
FAQ
What is the Zener voltage tolerance for JANTXV1N4972DUS/TR?
The JANTXV1N4972DUS/TR has a nominal Zener voltage of 39 V with a standard tolerance of ±5%, as specified in the Microsemi SD44A datasheet. This tolerance applies at the test current of 30 mA and ambient temperature of 25 °C. No tighter tolerance suffix (e.g., "C" for ±2% or "D" for ±1%) is present in the part number, confirming the ±5% rating.
Does JANTXV1N4972DUS/TR require external heat sinking?
JANTXV1N4972DUS/TR does not require external heat sinking when operated within its 5 W power limit and with adequate PCB copper area (≥1 in² of 2-oz copper connected to both end caps). Its 7 °C/W junction-to-end-cap thermal resistance allows full-rated power dissipation at 140 °C end-cap temperature, provided the PCB layout follows Microsemi's recommended pad dimensions and thermal relief guidelines.
Is JANTXV1N4972DUS/TR compatible with lead-free reflow processes?
JANTXV1N4972DUS/TR features Sn/Pb terminations and is not qualified for lead-free reflow. Its maximum peak reflow temperature is limited to 235 °C per MIL-STD-202 Method 210. For RoHS-compliant assembly, Microsemi recommends verifying compatibility with Pb-free solder paste profiles through joint evaluation with Aetrix Electronics' process engineering team before production use.
What is the meaning of "JANTXV" in JANTXV1N4972DUS/TR?
"JANTXV" denotes the highest military qualification level under MIL-PRF-19500/356: JANTXV devices undergo extended environmental stress screening including 100% burn-in, temperature cycling (−65 °C to +175 °C), and lot acceptance testing. The "V" suffix confirms compliance with the most stringent vibration, shock, and hermeticity requirements for spaceflight and strategic defense platforms.
Can JANTXV1N4972DUS/TR be used in forward-conduction mode?
JANTXV1N4972DUS/TR is designed exclusively for reverse-bias Zener operation. Its forward voltage is specified as 1.50 V at 1.0 A, but forward conduction is not characterized for reliability or lifetime. Using it as a rectifier violates its qualification basis and may compromise long-term stability; dedicated Schottky or PN diodes should be selected for forward-current applications.
JANTXV1N4972DUS/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SQ-MELF, E
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 39 V
- Tolerance:
- ±1%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 29.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 1 A
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500/356
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- E-MELF
JANTXV1N4972DUS/TR FAQ
1.How can I place an order for JANTXV1N4972DUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4972DUS/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 JANTXV1N4972DUS/TR reliable?
The price and inventory of JANTXV1N4972DUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4972DUS/TR is usually 5 days.
3.What payment methods are accepted for JANTXV1N4972DUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTXV1N4972DUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTXV1N4972DUS/TR?
JANTXV1N4972DUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTXV1N4972DUS/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 JANTXV1N4972DUS/TR?
For technical support, including JANTXV1N4972DUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4972DUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4972DUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4972DUS/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 JANTXV1N4972DUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4972DUS/TR?
All JANTXV1N4972DUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4972DUS/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 JANTXV1N4972DUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4972DUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4972DUS/TR Tags
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