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Microchip Technology JANTXV1N4972CUS/TR
- Part No.:
- JANTXV1N4972CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTXV1N4972CUS/TR.pdf
- Description:
- DIODE ZENER 39V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,340
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Product details
Overview
JANTXV1N4972CUS/TR from Microsemi is a military-grade, hermetically sealed surface-mount Zener diode rated for 5 W power dissipation at 140 °C end-cap temperature, with nominal Zener voltage of 39 V ±2% (C suffix), dynamic impedance of 14 Ω at 30 mA test current, and operating junction temperature range from –65 °C to +175 °C. It serves as a precision voltage reference and overvoltage clamp in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTXV1N4972CUS/TR datasheet, JANTXV1N4972CUS/TR pinout, JANTXV1N4972CUS/TR application, or JANTXV1N4972CUS/TR equivalent, key selection criteria include its voidless-glass hermetic package, Category I metallurgical bond, radiation-hardened construction per MicroNote 050, and compliance with MIL-PRF-19500/356 Class V screening.
Technical Context
This device operates in reverse breakdown mode with tightly controlled Zener voltage regulation across 10–50% of maximum Zener current (IZM = 930 mA), exhibiting ΔVZ ≤ 0.5 V under that load variation. Its thermal resistance is 7 °C/W junction-to-end-cap, enabling stable regulation in high-temperature avionics environments.
The "C" suffix denotes ±2% voltage tolerance, and the "US" suffix confirms surface-mount E-package (D-5B) configuration with tungsten slugs and copper end caps finished in Sn/Pb. Polarity is marked by cathode band; no marking appears on the body per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±2% at 30 mA - enables precise 39 V rail clamping or reference generation with low drift |
| Power Dissipation | 5 W @ TEC = 140 °C - supports sustained operation in conduction-cooled military power supplies |
| Dynamic Impedance (ZZ) | 14 Ω @ IZT = 30 mA - ensures minimal output voltage shift under dynamic load transients |
| Max Reverse Leakage (IR) | 2 μA @ VR = 29.7 V - guarantees low standby power loss in high-impedance bias networks |
| Operating Temperature | –65 °C to +175 °C - qualified for extreme-environment deployment without derating below –55 °C |
| Surge Current (8.3 ms) | 4.0 A - withstands lightning-induced transients in aircraft DC bus protection stages |
| Thermal Resistance | 7 °C/W junction-to-end-cap - allows direct thermal coupling to chassis or heat spreader without interface paste |
Pinout & Package
Package: Hermetically sealed voidless glass E-package ("D-5B"), with tungsten internal slugs and copper end caps plated with Sn/Pb. Cathode indicated by band; no part marking on body. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to system ground or lowest potential node during Zener operation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Provides stable 39 V reference when biased above VZ; marked by band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and long-term parameter drift in humid or vacuum environments |
| Category I metallurgical bond | Ensures mechanical integrity and thermal cycling reliability up to 1000 cycles between –65 °C and +175 °C |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands >15 kV HBM without parametric shift - simplifies handling in cleanroom assembly |
| Inherent radiation hardness | Qualified per Microsemi MicroNote 050 - suitable for low-dose-rate space applications without shielding |
| Triple-layer passivation | Prevents surface leakage paths and enhances stability under ionizing radiation exposure |
Applications
| Aerospace Power Bus Protection | High-Temperature Engine Control Reference |
|---|---|
|
Use Scenario: Clamping transient spikes on 28 V DC aircraft bus during load dump or generator switching. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector in parallel with primary regulator. Use Value: Withstands 4.0 A surge (8.3 ms) and maintains 39 V clamping threshold within ±2% across –65 °C to +175 °C. |
Use Scenario: Providing stable 39 V reference for analog sensor signal conditioning in turbine control electronics. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC biasing and op-amp feedback networks. Use Value: ΔVZ ≤ 0.5 V over 10–50% IZM, and <0.1% typical TC ensures accuracy over full engine temperature range. |
| Satellite Payload Voltage Regulation | Military Radio RF Stage Biasing |
|
Use Scenario: Generating stable bias for LNA and mixer stages in radiation-exposed satellite communication modules. IC Role / Device Role / Timing Role: Radiation-hardened Zener reference replacing less robust alternatives in critical signal chains. Use Value: Inherent radiation tolerance per MicroNote 050 eliminates need for additional shielding or redundancy overhead. |
Use Scenario: Setting fixed gate bias for GaN RF power amplifiers in manpack radios operating in desert environments. IC Role / Device Role / Timing Role: High-stability Zener providing 39 V gate control voltage independent of supply ripple. Use Value: 14 Ω dynamic impedance minimizes RF modulation sideband distortion caused by supply noise coupling. |
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/TR | Same 39 V rating but ±5% tolerance (no C suffix); higher max leakage (2 μA vs. 2 μA same), identical package and thermal specs | Acceptable where tighter voltage tolerance is not required; lower cost due to relaxed screening | Select JANTXV1N4972US/TR only if system-level calibration compensates for initial VZ variance |
| CDLL5379BTR | 39 V ±5%, plastic SOD-123 package, 1 W rating, 200 °C/W thermal resistance, not radiation-hardened | Limited to commercial-temperature, non-radiation environments; unsuitable for MIL-PRF-19500/356 programs | Use CDLL5379BTR only in cost-sensitive, non-military designs with ambient <85 °C and no radiation exposure |
Compared with JANTXV1N4972US/TR, the JANTXV1N4972CUS/TR delivers tighter voltage control essential for uncalibrated systems, while CDLL5379BTR trades hermeticity, power, and radiation tolerance for footprint and cost savings in benign environments.
Availability
JANTXV1N4972CUS/TR is available at Aetrix Electronics and suitable for aerospace power bus protection, high-temperature engine control reference, and satellite payload voltage regulation requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTXV1N4972CUS/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 JANTXV1N4972CUS/TR belongs to Microsemi's military-qualified Zener diode family designed specifically for fail-safe voltage regulation in mission-critical systems where hermeticity, radiation tolerance, and extreme-temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance of JANTXV1N4972CUS/TR?
The "C" suffix in JANTXV1N4972CUS/TR specifies a tight ±2% Zener voltage tolerance at 30 mA test current, yielding a guaranteed 38.22–39.78 V range at 25 °C. This tolerance remains valid across the full –65 °C to +175 °C operating temperature range per MIL-PRF-19500/356 screening requirements.
Does JANTXV1N4972CUS/TR require derating above 140 °C end-cap temperature?
Yes - JANTXV1N4972CUS/TR must be linearly derated from 5 W at TEC = 140 °C to 0 W at TEC = 175 °C. Derating slope is 142.9 mW/°C. End-cap temperature must be measured directly; junction temperature is calculated using the 7 °C/W thermal resistance specified in the SD44A datasheet for JANTXV1N4972CUS/TR.
Is JANTXV1N4972CUS/TR compatible with lead-free solder reflow profiles?
No - JANTXV1N4972CUS/TR features Sn/Pb finish on copper end caps and is not qualified for Pb-free reflow. Its maximum peak reflow temperature is 235 °C per MIL-STD-202 Method 210, and exceeding this risks compromising the hermetic glass seal. Lead-free assembly requires explicit qualification testing per customer process.
What does the "JANTXV" prefix indicate for JANTXV1N4972CUS/TR?
The "JANTXV" prefix certifies that JANTXV1N4972CUS/TR meets the highest level of MIL-PRF-19500/356 screening, including extended temperature cycling, burn-in, and radiation lot acceptance testing. It exceeds standard JAN and JANTX levels in thermal shock endurance and parametric stability after environmental stress.
Can JANTXV1N4972CUS/TR be used as a forward-biased diode?
JANTXV1N4972CUS/TR is characterized for reverse-bias Zener operation; its forward voltage is specified as 1.50 V at 1.0 A, but it is not optimized for rectification. Using it in forward conduction risks exceeding junction temperature limits due to lack of forward SOA characterization - it should only be operated in reverse breakdown per its design intent.
JANTXV1N4972CUS/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:
- ±2%
- 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
JANTXV1N4972CUS/TR FAQ
1.How can I place an order for JANTXV1N4972CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTXV1N4972CUS/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 JANTXV1N4972CUS/TR reliable?
The price and inventory of JANTXV1N4972CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTXV1N4972CUS/TR is usually 5 days.
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Once your JANTXV1N4972CUS/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 JANTXV1N4972CUS/TR?
For technical support, including JANTXV1N4972CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTXV1N4972CUS/TR requirements.
6.How does Aetrix verify that JANTXV1N4972CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTXV1N4972CUS/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 JANTXV1N4972CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTXV1N4972CUS/TR?
All JANTXV1N4972CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTXV1N4972CUS/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 JANTXV1N4972CUS/TR part is unused and in its original packaging.
Return procedure for JANTXV1N4972CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
JANTXV1N4972CUS/TR Tags
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