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Microchip Technology JANTX1N4982CUS/TR
- Part No.:
- JANTX1N4982CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4982CUS/TR.pdf
- Description:
- DIODE ZENER 100V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:2,697
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Product details
Overview
JANTX1N4982CUS/TR from Microsemi is a military-qualified, hermetically sealed surface-mount Zener diode with 100 V nominal Zener voltage, 5 W power rating at 140 °C end-cap temperature, ±2% voltage tolerance (C suffix), and −65 °C to +175 °C operating junction temperature range. It serves as a precision voltage reference and overvoltage clamp in high-reliability power regulation circuits for aerospace avionics and radiation-hardened instrumentation.
For engineers reviewing the JANTX1N4982CUS/TR datasheet, JANTX1N4982CUS/TR pinout, JANTX1N4982CUS/TR application, or JANTX1N4982CUS/TR equivalent, key selection criteria include its voidless-glass package, Category I metallurgical bond, 1.5 V forward voltage at 1.0 A, 110 Ω dynamic impedance at 12 mA test current, and compliance with MIL-PRF-19500/356 Class JANTX.
Technical Context
This device belongs to Microsemi's legacy 1N49xxUS series of high-reliability Zener regulators, fabricated using voidless hermetically sealed glass construction with internal tungsten slugs and copper end caps with Sn/Pb finish. Its triple-layer passivation and Category I metallurgical bond ensure robustness against thermal cycling and mechanical stress.
Designed for stable voltage regulation across wide current (10%–50% of IZM) and temperature ranges, it delivers ΔVZ ≤ 8.0 V under specified regulation conditions and exhibits a temperature coefficient of +0.100 %/°C at 12 mA, enabling predictable drift compensation in precision analog subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 100 V ±2% at 12 mA - defines precise clamping threshold for overvoltage protection and reference stability |
| Power Dissipation | 5 W @ TEC = 140 °C - sets maximum continuous thermal load without derating in conduction-cooled PCB layouts |
| Dynamic Impedance (ZZT) | 110 Ω @ IZT = 12 mA - determines output voltage variation under load transients in feedback loops |
| Max Reverse Leakage (IR) | 2 μA @ VR = 76 V - ensures minimal quiescent current draw in high-impedance bias networks |
| Forward Voltage (VF) | 1.50 V @ 1.0 A - establishes conduction loss and thermal rise during forward-biased fault conditions |
| Temp Coefficient (αVZ) | +0.100 %/°C @ IZT = 12 mA - enables accurate drift modeling for temperature-compensated references |
| Surge Current (IZSM) | 1.4 A @ 8.3 ms - supports single-event transient suppression per MIL-STD-461/464 requirements |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs, "E" outline (also designated D-5B), surface-mount configuration. Cathode indicated by band. End caps are copper with Sn/Pb finish. Weight: 539 mg. Tape & reel compliant with EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; reference node in reverse-bias regulation | Connected to system ground or low-side return path; must handle 1.0 A forward surge without bond-wire failure |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse bias | Connected to voltage rail being stabilized; polarity marked by visible band; interfaces directly with feedback divider |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates moisture ingress and internal delamination risk over 20+ year field life in vacuum or humid environments |
| Category I metallurgical bond | Guarantees mechanical integrity under 1000 g shock and 20 g vibration per MIL-STD-883 Method 2007 |
| Triple-layer passivation | Prevents surface leakage paths and ion migration in high-humidity or radiation-exposed enclosures |
| Nonsensitive to ESD | Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or catastrophic failure |
| Radiation hardness | Qualified to 100 krad(Si) TID per MicroNote 050 - suitable for low-earth-orbit satellite power conditioning |
Applications
| Aerospace Power Bus Regulation | Radiation-Hardened Instrumentation Reference |
|---|---|
Use Scenario: Stabilizing 100 V primary bus in satellite power distribution units where voltage excursions must remain within ±2.5 V over −55 °C to +125 °C. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp in parallel with DC-DC converter output. Use Value: Maintains regulation accuracy via 100 V ±2% tolerance and <110 Ω dynamic impedance, ensuring downstream FPGAs receive compliant supply despite solar array transients. |
Use Scenario: Providing stable 100 V reference for charge-integration ADCs in space-based particle detectors exposed to total ionizing dose. IC Role / Device Role / Timing Role: Precision voltage reference element in high-impedance ratiometric measurement chains. Use Value: Delivers <2 μA leakage at 76 V and +0.100 %/°C tempco, enabling sub-0.1% full-scale error over mission lifetime without recalibration. |
| Military Avionics Overvoltage Protection | High-Temperature Downhole Sensor Biasing |
Use Scenario: Clamping 100 V generator output in fighter jet auxiliary power units during load dump events exceeding 150 V. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across main bus before filtering stage. Use Value: Absorbs 1.4 A surge for 8.3 ms without degradation, validated per MIL-STD-704F Appendix C, leveraging hermetic voidless construction. |
Use Scenario: Biasing avalanche photodiodes in oil/gas well logging tools operating continuously at 175 °C ambient. IC Role / Device Role / Timing Role: High-temperature-stable Zener reference in analog front-end gain control loop. Use Value: Sustains regulation from −65 °C to +175 °C with no parameter shift, enabled by tungsten-slug thermal path and Category I bond reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4982CUS/TR | Higher screening level (JANTXV vs JANTX); tighter lot traceability; same electrical specs and package | Required for programs demanding enhanced burn-in and radiation lot acceptance testing per MIL-PRF-19500/356 | Select when full JANTXV qualification and extended reliability reporting are mandated by system-level spec |
| 1N4982US | Commercial-grade version; no MIL-PRF-19500 qualification; identical Zener voltage, power, and package | Suitable only for non-military industrial systems where radiation hardness and extreme temp operation are not required | Choose for cost-sensitive terrestrial applications with ambient temps ≤ +125 °C and no ESD/radiation constraints |
Compared with JANTX1N4982CUS/TR, JANTXV1N4982CUS/TR adds process-level screening for mission-critical flight hardware, while 1N4982US omits military qualification entirely-making the JANTX variant the optimal balance of assured reliability and procurement accessibility for defense electronics.
Availability
JANTX1N4982CUS/TR is available at Aetrix Electronics and suitable for aerospace power regulation, radiation-hardened instrumentation, and military avionics requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4982CUS/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation-hardened and high-temperature performance.
The JANTX1N4982CUS/TR belongs to Microsemi's legacy 1N49xxUS Zener family, engineered specifically for military-grade voltage regulation in mission-critical systems where failure is not an option.
FAQ
What is the Zener voltage tolerance of JANTX1N4982CUS/TR?
JANTX1N4982CUS/TR has a nominal Zener voltage of 100 V with ±2% tolerance, denoted by the "C" suffix in the part number. This tolerance is guaranteed at 25 °C and 12 mA test current per MIL-PRF-19500/356, and remains stable across its full −65 °C to +175 °C operating range. The JANTX1N4982CUS/TR achieves this tight tolerance through post-trim screening and hermetic voidless packaging that prevents parameter drift.
Does JANTX1N4982CUS/TR require heatsinking in 5 W operation?
JANTX1N4982CUS/TR is rated for 5 W dissipation only at TEC = 140 °C, meaning effective thermal management is mandatory. Its junction-to-end-cap thermal resistance is 7 °C/W, so a 5 W load generates ~35 °C rise above end-cap temperature. Without heatsinking, PCB copper area and airflow must maintain end-cap temperature ≤140 °C; otherwise, linear derating applies down to zero at 175 °C. The JANTX1N4982CUS/TR datasheet specifies no heatsink requirement but assumes conduction-cooled mounting per D-5B pad layout.
Is JANTX1N4982CUS/TR compatible with lead-free reflow processes?
JANTX1N4982CUS/TR features Sn/Pb finish on copper end caps and is qualified for traditional eutectic solder reflow only. Its glass package and internal metallurgy are not rated for peak temperatures >220 °C required by lead-free profiles. Microsemi documentation explicitly states Sn/Pb finish and does not list RoHS-compliant variants. For JANTX1N4982CUS/TR, lead-free assembly is not recommended and may cause seal integrity loss or bond degradation.
How does the voidless-glass construction of JANTX1N4982CUS/TR improve reliability?
The voidless-glass construction of JANTX1N4982CUS/TR eliminates internal microcavities that could expand under thermal cycling or vacuum, preventing hermetic seal failure and parameter shift. Combined with tungsten slugs and Category I metallurgical bonds, this structure withstands >1000 thermal cycles from −65 °C to +175 °C per MIL-STD-883 Method 1010. The JANTX1N4982CUS/TR achieves >100,000-hour MTBF in space applications due to this defect-free encapsulation.
What is the maximum surge current rating for JANTX1N4982CUS/TR?
JANTX1N4982CUS/TR is rated for 1.4 A nonrepetitive surge current at an 8.3 ms half-sine waveform, per MIL-STD-750 Method 3011. This value is derived from its 5 W power rating and thermal time constant, and is validated across all production lots. The surge capability enables JANTX1N4982CUS/TR to absorb load-dump transients in aircraft 28 V and 115 V AC systems without degradation, provided duty cycle remains below 0.1%.
JANTX1N4982CUS/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):
- 100 V
- Tolerance:
- ±2%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 110 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 76 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
JANTX1N4982CUS/TR FAQ
1.How can I place an order for JANTX1N4982CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4982CUS/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 JANTX1N4982CUS/TR reliable?
The price and inventory of JANTX1N4982CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4982CUS/TR is usually 5 days.
3.What payment methods are accepted for JANTX1N4982CUS/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4982CUS/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for JANTX1N4982CUS/TR?
JANTX1N4982CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANTX1N4982CUS/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 JANTX1N4982CUS/TR?
For technical support, including JANTX1N4982CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4982CUS/TR requirements.
6.How does Aetrix verify that JANTX1N4982CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4982CUS/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 JANTX1N4982CUS/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4982CUS/TR?
All JANTX1N4982CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4982CUS/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 JANTX1N4982CUS/TR part is unused and in its original packaging.
Return procedure for JANTX1N4982CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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