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Microchip Technology JANTX1N4980US/TR
- Part No.:
- JANTX1N4980US/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANTX1N4980US/TR.pdf
- Description:
- DIODE ZENER 82V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,463
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Product details
Overview
JANTX1N4980US/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 82 V ±5%, dynamic impedance of 80 Ω at 15 mA test current, and maximum reverse leakage of 2 μA at 62.2 V. It serves as a precision voltage reference and overvoltage clamp in high-reliability aerospace power conditioning circuits.
For engineers reviewing the JANTX1N4980US/TR datasheet, JANTX1N4980US/TR pinout, JANTX1N4980US/TR application, or JANTX1N4980US/TR equivalent, this part is selected for critical voltage regulation where extended temperature operation (–65 °C to +175 °C), radiation hardness, and voidless-glass reliability are mandatory design requirements.
Technical Context
This device operates in reverse breakdown mode with a specified Zener voltage of 82 V at IZT = 15 mA, exhibiting a temperature coefficient of +0.100 %/°C and dynamic impedance of 80 Ω under regulated conditions. Its construction uses internal Category I metallurgical bonds and triple-layer passivation for enhanced stability.
The JANTX1N4980US/TR delivers stable regulation across 10%–50% of IZM (1.8 A), with forward voltage limited to 1.5 V at 1.0 A and surge current rating of 1.8 A for 8.3 ms square-wave transients. Thermal resistance is 7 °C/W junction-to-end-cap.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 82 V ±5% at 15 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation | 5 W @ TEC = 140 °C - supports continuous operation in high-ambient environments |
| Dynamic Impedance (ZZ) | 80 Ω at IZT = 15 mA - ensures low output voltage variation under load changes |
| Reverse Leakage (IR) | 2 μA max at 62.2 V - guarantees minimal standby current in high-impedance bias networks |
| Operating Temperature | –65 °C to +175 °C - enables deployment in space-grade and jet-engine-mounted electronics |
| Thermal Resistance | 7 °C/W junction-to-end-cap - allows direct thermal coupling to heatsink or PCB copper |
| Surge Current (IZSM) | 1.8 A for 8.3 ms - withstands transient overloads without degradation |
Pinout & Package
Package: Hermetically sealed voidless hard glass case with tungsten slugs; "E" package (also designated D-5B); cathode indicated by band; end caps are copper 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 | Connected to lower-potential node during normal operation; carries full surge current in forward bias |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential node; establishes regulated reference voltage at this node |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Eliminates internal moisture and particle migration, ensuring >20-year operational life in vacuum or humid environments |
| Category I metallurgical bond | Provides mechanical integrity and thermal cycling endurance exceeding MIL-PRF-19500/356 requirements |
| Triple-layer passivation | Prevents surface leakage and ion contamination under high-humidity or radiation exposure |
| Nonsensitive to ESD | Rated per MIL-STD-750 Method 1020 - no handling precautions required beyond standard static-safe protocols |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 - suitable for low-earth orbit and nuclear instrumentation applications |
Applications
| Aerospace Power Bus Regulation | Satellite Payload Voltage Reference |
|---|---|
Use Scenario: Regulating unregulated 100 V bus in satellite power distribution unit under thermal cycling and radiation exposure. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp bus voltage at 82 V ±5%. Use Value: Maintains stable 82 V reference despite input variations up to ±15%, leveraging 7 °C/W thermal resistance and –65 °C to +175 °C operating range. |
Use Scenario: Providing precision bias voltage for analog front-end amplifiers in scientific instrument payloads. IC Role / Device Role / Timing Role: High-stability voltage reference source with <0.1%/°C TC and <2 μA leakage at 62.2 V. Use Value: Enables sub-millivolt measurement accuracy over orbital temperature swings, supported by radiation-hardened voidless-glass construction. |
| Military Avionics Overvoltage Protection | Ground-Based Radar Transmitter Clamp |
Use Scenario: Clamping transient spikes on 28 V DC aircraft power lines during generator switching events. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing 8.3 ms surges up to 1.8 A without degradation. Use Value: Prevents downstream damage using 1.8 A surge rating and 80 Ω dynamic impedance to limit overshoot within 5% of 82 V. |
Use Scenario: Protecting RF amplifier bias rails from flyback-induced voltage spikes in pulsed radar transmitters. IC Role / Device Role / Timing Role: High-energy Zener clamp dissipating 5 W continuously during pulse duty cycles. Use Value: Sustains 5 W dissipation at 140 °C end-cap temperature, enabling compact heatsink integration in confined transmitter enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4980US | Higher screening level (JANTXV vs JANTX); tighter lot traceability; same electrical specs and package | Required for Class V space-qualified designs with zero defect tolerance | Select JANTXV1N4980US when mission-critical radiation testing or extended burn-in is mandated |
| 1N4980US | Commercial-grade version; identical Zener voltage, impedance, and package; no MIL-PRF-19500 qualification | Suitable for non-military industrial systems where cost and lead time outweigh radiation/temperature demands | Choose 1N4980US for prototyping or commercial avionics derivatives lacking formal MIL-spec compliance |
Compared with JANTX1N4980US/TR, JANTXV1N4980US adds process-level radiation assurance and lot-level documentation for flight hardware, while 1N4980US removes military screening but retains identical electrical performance and footprint-enabling drop-in validation before final qualification.
Availability
JANTX1N4980US/TR is available at Aetrix Electronics and suitable for aerospace power regulation, satellite payload referencing, and military avionics overvoltage protection requiring stable component supply across extended temperature and radiation environments.
Supply support for JANTX1N4980US/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 JANTX1N4980US/TR belongs to Microsemi's military-qualified Zener diode family designed for voltage regulation and transient suppression in mission-critical systems operating under extreme thermal, mechanical, and radiation stress.
FAQ
What is the Zener voltage tolerance for JANTX1N4980US/TR?
The JANTX1N4980US/TR has a nominal Zener voltage of 82 V with a standard tolerance of ±5%, as defined in MIL-PRF-19500/356. This tolerance applies at the specified test current of 15 mA and ambient temperature of 25 °C. No tighter tolerance suffix (e.g., C or D) is present in the part number, confirming the ±5% specification for JANTX1N4980US/TR.
Does JANTX1N4980US/TR require derating above 140 °C?
Yes, JANTX1N4980US/TR must be derated linearly above an end-cap temperature (TEC) of 140 °C, reaching zero power dissipation at 175 °C. The derating slope is 5 W / 35 °C = 143 mW/°C. This requirement is explicitly stated in the Maximum Ratings table and applies regardless of mounting method or heatsinking.
Is JANTX1N4980US/TR compatible with lead-free reflow processes?
No, JANTX1N4980US/TR features tin/lead (Sn/Pb) terminations and is not qualified for lead-free reflow. Its end caps use Sn/Pb finish per the Mechanical and Packaging section, and the datasheet does not specify compatibility with peak temperatures exceeding 220 °C. Lead-free assembly requires explicit requalification per MIL-STD-202.
What is the maximum continuous Zener current for JANTX1N4980US/TR?
The maximum continuous Zener current (IZM) for JANTX1N4980US/TR is 1.8 A, calculated from its 5 W power rating and 82 V Zener voltage (P = V × I). This value is confirmed in the Electrical Characteristics table under "MAXIMUM CONTINUOUS CURRENT IZM" for the 1N4980US entry, which applies identically to JANTX1N4980US/TR.
How is polarity identified on JANTX1N4980US/TR?
Polarity on JANTX1N4980US/TR is indicated by a visible cathode band on the glass body. The banded end is the cathode terminal, and the opposite end is the anode. This marking is consistent across all parts in the 1N4954US–1N4996US series and is documented in the Mechanical and Packaging section of the datasheet.
JANTX1N4980US/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):
- 82 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 62.2 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
JANTX1N4980US/TR FAQ
1.How can I place an order for JANTX1N4980US/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANTX1N4980US/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 JANTX1N4980US/TR reliable?
The price and inventory of JANTX1N4980US/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4980US/TR is usually 5 days.
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Once your JANTX1N4980US/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 JANTX1N4980US/TR?
For technical support, including JANTX1N4980US/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4980US/TR requirements.
6.How does Aetrix verify that JANTX1N4980US/TR is sourced from the original manufacturer or authorized distributors?
All JANTX1N4980US/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 JANTX1N4980US/TR meets industry standards.
7.What is the process for return or replacement of JANTX1N4980US/TR?
All JANTX1N4980US/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4980US/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 JANTX1N4980US/TR part is unused and in its original packaging.
Return procedure for JANTX1N4980US/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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