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Microchip Technology JANS1N4980CUS/TR
- Part No.:
- JANS1N4980CUS/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- SQ-MELF, E
- Datasheet:
-
JANS1N4980CUS/TR.pdf
- Description:
- DIODE ZENER 82V 5W E-MELF
- Quantity:
- Payment:
- Shipping:
Inventory:4,971
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Product details
Overview
JANS1N4980CUS/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 operating junction temperature range of −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 JANS1N4980CUS/TR datasheet, JANS1N4980CUS/TR pinout, JANS1N4980CUS/TR application, or JANS1N4980CUS/TR equivalent, this part is selected for mission-critical voltage regulation where radiation hardness, ESD immunity per MIL-STD-750 Method 1020, and voidless-glass hermeticity are mandatory design requirements.
Technical Context
This device belongs to the JANS-qualified 1N4954US–1N4996US family, featuring Category I internal metallurgical bonds and triple-layer passivation. Its Zener breakdown mechanism delivers stable regulation across 10%–50% of maximum Zener current (IZM = 1.8 A), with voltage change ΔVZ ≤ 6.6 V under that load variation.
The "CUS" suffix denotes surface-mount glass package with copper end caps and Sn/Pb finish; "TR" indicates tape-and-reel packaging per EIA-481-B. Polarity is marked by cathode band; no marking appears on the case itself per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 82 V ±5% at IZT = 15 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 5 W @ TEC = 140 °C - sets thermal derating baseline for PCB layout and heatsinking |
| Dynamic Impedance (ZZ) | 80 Ω @ IZT = 15 mA - determines output voltage stability under load transients |
| Max Reverse Leakage (IR) | 2 μA @ VR = 62.2 V - ensures minimal standby current in high-impedance bias networks |
| Surge Current (IZSM) | 1.8 A @ 8.3 ms square wave - supports transient overvoltage clamping without failure |
| Temp Coefficient (αVZ) | +0.100 %/°C @ IZT - quantifies voltage drift over full −65 °C to +175 °C operating range |
| Forward Voltage (VF) | 1.50 V @ 1.0 A - enables use as polarity-sensitive protection element in series configurations |
Pinout & Package
Package: Hermetically sealed voidless hard glass case ("E" or "D-5B") with tungsten slugs and copper end caps (Sn/Pb finish). Cathode indicated by band. Weight: 539 mg. Tape-and-reel compliant per EIA-481-B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; referenced ground node in reverse-bias regulation | Connected to lower-potential side of regulated rail; must withstand 1.5 V forward drop at 1 A |
| Cathode | Current exit terminal in forward bias; regulated output node in reverse-bias operation | Provides stable 82 V reference when reverse-biased above knee; marked by visible band |
Key Features
| Feature | Design Value |
|---|---|
| Voidless hermetic glass seal | Prevents moisture ingress and internal corrosion over 20+ year field life in vacuum or humid environments |
| Category I metallurgical bond | Ensures mechanical integrity under shock/vibration up to 100 g and thermal cycling from −65 °C to +175 °C |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Eliminates need for external ESD protection circuitry in handling and assembly |
| Inherent radiation hardness | Validated per Microsemi MicroNote 050 for total ionizing dose (TID) > 100 krad(Si) - suitable for LEO/MEO orbits |
| Triple-layer passivation | Blocks surface conduction paths and suppresses leakage current drift during long-term bias stress |
Applications
| Avionics Power Bus Regulation | Satellite Payload Reference Supply |
|---|---|
Use Scenario: Regulating auxiliary 28 V DC bus in flight control computers where single-point failure must be avoided. IC Role / Device Role / Timing Role: Primary voltage reference and overvoltage clamp in redundant linear regulator feedback loop. Use Value: Maintains ±5% output accuracy across −55 °C to +125 °C ambient while surviving 100 krad(Si) TID exposure. |
Use Scenario: Providing stable bias for RF front-end LNAs in low-earth-orbit communication payloads. IC Role / Device Role / Timing Role: Precision Zener reference in ultra-low-noise voltage reference chain feeding ADC drivers. Use Value: Delivers <2 μA leakage at 62.2 V and <80 Ω dynamic impedance to minimize reference noise coupling into analog signal path. |
| Nuclear Instrumentation Signal Conditioning | Tactical Radios High-Voltage Protection |
Use Scenario: Biasing photomultiplier tube (PMT) anode chains in radiation detection systems deployed in reactor containment zones. IC Role / Device Role / Timing Role: High-stability Zener source establishing graded HV ladder for PMT dynode chain. Use Value: Operates continuously at 175 °C junction temperature with zero parametric shift after 106 thermal cycles. |
Use Scenario: Clamping induced surges on 13.8 V vehicle-mounted radio power inputs exposed to EMP and lightning-induced transients. IC Role / Device Role / Timing Role: Fast-response overvoltage protector placed directly at connector entry point. Use Value: Absorbs 1.8 A surge (8.3 ms) without degradation, verified per MIL-STD-461G CS115. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| JANTXV1N4980US | Same electrical specs and hermetic glass package, but qualified to JANTXV level (not JANS); lacks radiation hardness documentation | Approved for high-reliability ground-based military systems but not spaceflight or nuclear environments | Select when radiation tolerance is not required and cost sensitivity favors non-JANS qualification |
| 1N4980US | Commercial-grade version; identical Zener voltage and package, but no MIL-PRF-19500/356 qualification or radiation data | Limited to industrial or commercial avionics where extended temperature and reliability testing are optional | Choose only for prototyping or non-mission-critical subsystems with relaxed assurance requirements |
Compared with JANS1N4980CUS/TR, JANTXV1N4980US offers identical performance in thermal and electrical domains but omits radiation validation, while 1N4980US removes all military qualification-making the JANS variant the sole choice for space, nuclear, or strategic defense applications demanding full MIL-spec compliance.
Availability
JANS1N4980CUS/TR is available at Aetrix Electronics and suitable for avionics power regulation, satellite payload reference supplies, and nuclear instrumentation requiring stable component supply with guaranteed traceability and long-term obsolescence management.
Supply support for JANS1N4980CUS/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 hermetically sealed components.
The JANS1N4980CUS/TR belongs to Microsemi's legacy MIL-PRF-19500/356 qualified Zener diode product line, engineered specifically for voltage reference and overvoltage protection in safety-critical systems operating under extreme environmental stress.
FAQ
What is the Zener voltage tolerance for JANS1N4980CUS/TR?
JANS1N4980CUS/TR has a nominal Zener voltage of 82 V with a standard tolerance of ±5%, as defined in the Microsemi SD44A datasheet. This tolerance applies at the specified test current of 15 mA and ambient temperature of 25 °C. No tighter tolerance (e.g., ±1% or ±2%) is assigned to this specific suffix configuration.
Is JANS1N4980CUS/TR compatible with lead-free solder reflow profiles?
JANS1N4980CUS/TR features copper end caps with Sn/Pb finish, making it incompatible with Pb-free reflow processes. Its construction is optimized for traditional 63Sn/37Pb soldering at peak temperatures ≤ 235 °C. Use of lead-free profiles may compromise hermetic seal integrity and metallurgical bond reliability.
Does JANS1N4980CUS/TR require derating above 140 °C end-cap temperature?
Yes - JANS1N4980CUS/TR must be linearly derated from 5 W at TEC = 140 °C to 0 W at TEC = 175 °C. This derating slope is 0.143 W/°C, meaning power capability drops to 4.29 W at 145 °C and 3.57 W at 150 °C. Thermal design must ensure end-cap temperature remains within this limit under worst-case ambient and power dissipation conditions.
What is the maximum continuous Zener current (IZM) for JANS1N4980CUS/TR?
The maximum continuous Zener current for JANS1N4980CUS/TR is 1.8 A, calculated from its 5 W power rating and 82 V Zener voltage (IZM = PD/VZ). This value assumes operation at TEC = 140 °C and accounts for thermal resistance of 7 °C/W junction-to-end-cap.
How is polarity identified on JANS1N4980CUS/TR?
JANS1N4980CUS/TR uses a visible cathode band to indicate polarity - the banded end is the cathode. The device has no alphanumeric marking on the glass body. During PCB layout, the cathode pad must connect to the higher-potential node when used in reverse-bias regulation mode.
JANS1N4980CUS/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:
- ±2%
- 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
JANS1N4980CUS/TR FAQ
1.How can I place an order for JANS1N4980CUS/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for JANS1N4980CUS/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 JANS1N4980CUS/TR reliable?
The price and inventory of JANS1N4980CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANS1N4980CUS/TR is usually 5 days.
3.What payment methods are accepted for JANS1N4980CUS/TR?
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JANS1N4980CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JANS1N4980CUS/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 JANS1N4980CUS/TR?
For technical support, including JANS1N4980CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANS1N4980CUS/TR requirements.
6.How does Aetrix verify that JANS1N4980CUS/TR is sourced from the original manufacturer or authorized distributors?
All JANS1N4980CUS/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 JANS1N4980CUS/TR meets industry standards.
7.What is the process for return or replacement of JANS1N4980CUS/TR?
All JANS1N4980CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANS1N4980CUS/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 JANS1N4980CUS/TR part is unused and in its original packaging.
Return procedure for JANS1N4980CUS/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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