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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology JANTX1N4980CUS/TR

Name: JANTX1N4980CUS/TR
Brand: Microchip Technology
SKU: JANTX1N4980CUS/TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: JANTX1N4980CUS/TR

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: SQ-MELF, E

Datasheet:: JANTX1N4980CUS/TR.pdf

Description:: DIODE ZENER 82V 5W E-MELF

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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 mission-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 belongs to the MIL-PRF-19500/356 qualified 1N4954US–1N4996US family, featuring triple-layer passivation and Category I internal metallurgical bonds. Its Zener breakdown mechanism delivers stable regulation across 10%–50% of IZM (1.8 A), with voltage change ΔVZ ≤ 6.6 V under that current range.

The "E" package (D-5B) uses tungsten slugs and copper end caps with Sn/Pb finish, enabling direct solder attachment without adhesive. Thermal resistance is 7 °C/W junction-to-end-cap, supporting sustained 5 W operation only when end-cap temperature is maintained ≤140 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	82 V ±5% at 15 mA - defines regulated output voltage under nominal bias; tolerance impacts reference accuracy in feedback loops.
Power Dissipation	5 W @ T_EC = 140 °C - maximum continuous power before thermal derating begins; zero at 175 °C junction.
Dynamic Impedance Z_Z	80 Ω @ I_ZT = 15 mA - low impedance ensures minimal output voltage shift under load transients.
Reverse Leakage I_R	2 μA @ V_R = 62.2 V - ultra-low leakage preserves signal integrity in high-impedance bias networks.
Operating Temperature	–65 °C to +175 °C - enables deployment in satellite power systems and jet engine controllers without derating.
Forward Voltage V_F	1.50 V @ 1.0 A - specifies forward conduction drop during transient clamping or polarity protection use.
Surge Current I_ZSM	1.8 A @ 8.3 ms - supports single-event transient suppression per MIL-STD-461 CS115 without failure.

Pinout & Package

Package: Hermetically sealed voidless glass "E" package (JEDEC D-5B), with tungsten slugs and copper end caps finished in Sn/Pb. Cathode indicated by band. No marking on body. Weight: 539 mg.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal in forward bias; connected to ground or low-side reference in shunt regulator topology.	Must be routed to lowest-impedance ground plane to minimize noise coupling into regulation node.
Cathode	Current exit terminal in forward bias; connected to regulated rail or input in shunt regulator configuration.	Banded end - polarity must be verified during automated placement; misorientation causes open-circuit failure.

Key Features

Feature	Design Value
Voidless hermetic glass seal	Eliminates moisture ingress and internal delamination - critical for >20-year life in vacuum or humid environments.
Category I metallurgical bond	Ensures mechanical integrity under shock/vibration up to 100 g - validated per MIL-STD-883 Method 2002.
Nonsensitive to ESD	Withstands ≥4 kV HBM per MIL-STD-750 Method 1020 - no handling precautions needed beyond standard ESD controls.
Inherent radiation hardness	Qualified to 100 krad(Si) TID per MicroNote 050 - suitable for low-earth orbit avionics without shielding.
Tape & reel packaging	EIA-481-B compliant - enables direct use in high-speed SMT pick-and-place machines without repackaging.

Applications

Aerospace Power Bus Regulation	Satellite Solar Array Monitor
Use Scenario: Regulating 28 V DC bus in launch vehicle telemetry modules exposed to wide thermal cycling and vibration. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 28 V reference for ADCs and comparators in power management ICs. Use Value: Maintains ±0.5% regulation across –55 °C to +125 °C ambient due to low αV_Z (±0.100%/°C) and robust thermal path.	Use Scenario: Monitoring solar array string voltage in LEO satellites where radiation-induced parameter drift must be minimized. IC Role / Device Role / Timing Role: Precision voltage clamp protecting downstream analog front-ends from overvoltage during panel reconfiguration events. Use Value: Radiation-hardened construction prevents parametric shift after 100 krad(Si), ensuring long-term measurement fidelity.
Jet Engine FADEC Reference	Military Radar Pulse Generator
Use Scenario: Providing stable reference for fuel control loop DACs in full-authority digital engine controllers operating at 175 °C junction. IC Role / Device Role / Timing Role: Primary Zener reference in closed-loop voltage regulation circuit feeding analog sensor signal chains. Use Value: Operates continuously at 175 °C junction with no degradation - validated per MIL-PRF-19500/356 screening.	Use Scenario: Clamping pulse amplitude in high-voltage modulator stages of airborne fire-control radar transmitters. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 8.3 ms surge pulses up to 1.8 A without parametric shift. Use Value: 5 W steady-state + 1.8 A surge rating meets MIL-STD-461 CS115 pulse requirements without external snubbers.

Aerospace Power Bus Regulation

Satellite Solar Array Monitor

Use Scenario: Regulating 28 V DC bus in launch vehicle telemetry modules exposed to wide thermal cycling and vibration.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 28 V reference for ADCs and comparators in power management ICs.

Use Value: Maintains ±0.5% regulation across –55 °C to +125 °C ambient due to low αV_Z (±0.100%/°C) and robust thermal path.

Use Scenario: Monitoring solar array string voltage in LEO satellites where radiation-induced parameter drift must be minimized.

IC Role / Device Role / Timing Role: Precision voltage clamp protecting downstream analog front-ends from overvoltage during panel reconfiguration events.

Use Value: Radiation-hardened construction prevents parametric shift after 100 krad(Si), ensuring long-term measurement fidelity.

Jet Engine FADEC Reference

Military Radar Pulse Generator

Use Scenario: Providing stable reference for fuel control loop DACs in full-authority digital engine controllers operating at 175 °C junction.

IC Role / Device Role / Timing Role: Primary Zener reference in closed-loop voltage regulation circuit feeding analog sensor signal chains.

Use Value: Operates continuously at 175 °C junction with no degradation - validated per MIL-PRF-19500/356 screening.

Use Scenario: Clamping pulse amplitude in high-voltage modulator stages of airborne fire-control radar transmitters.

IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 8.3 ms surge pulses up to 1.8 A without parametric shift.

Use Value: 5 W steady-state + 1.8 A surge rating meets MIL-STD-461 CS115 pulse requirements without external snubbers.

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	Higher screening level: JANTXV per MIL-PRF-19500/356 includes burn-in and 100% parametric testing at extremes.	Required for Class H (spaceflight) and Class K (nuclear survivability) programs where zero defect probability is mandated.	Select JANTXV1N4980US when full MIL-PRF-19500/356 Class V screening is specified in the BOM.
1N4980US	Commercial-grade version: no military screening, no JAN/JANTX/JANTXV prefix, same electrical specs and package.	Suitable for industrial test equipment or non-mission-critical avionics where cost and lead time outweigh radiation/temperature margin needs.	Choose 1N4980US for prototyping or commercial derivatives where MIL-spec is not contractually required.

Compared with JANTX1N4980US/TR, JANTXV1N4980US adds burn-in and extreme-temperature testing for zero-defect assurance in spaceflight, while 1N4980US removes all military screening to reduce cost and delivery time - both share identical Zener voltage, power rating, and D-5B package.

Availability

JANTX1N4980US/TR is available at Aetrix Electronics and suitable for aerospace power regulation, satellite subsystem monitoring, and jet engine FADEC reference applications 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 manufacturer specializing in high-reliability analog and mixed-signal components for defense, aerospace, and industrial markets.

The JANTX1N4980US/TR belongs to Microsemi's legacy MIL-PRF-19500/356 Zener diode product line, engineered specifically for voltage reference and overvoltage protection in mission-critical systems where failure is not an option.

FAQ

What is the Zener voltage tolerance for JANTX1N4980US/TR?

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 25 °C with test current I_ZT = 15 mA. Tighter tolerances (e.g., ±2% or ±1%) require different suffixes (C or D) not present in the JANTX1N4980US/TR designation.

Does JANTX1N4980US/TR require heatsinking in 5 W operation?

JANTX1N4980US/TR does not require external heatsinking if the end-cap temperature (T_EC) is maintained at or below 140 °C. Its thermal resistance is 7 °C/W junction-to-end-cap. PCB copper area and solder joint thermal mass serve as the primary heat path - forced air or metal-core boards may be needed to sustain 5 W in enclosed, high-ambient environments.

Is JANTX1N4980US/TR compatible with lead-free reflow processes?

JANTX1N4980US/TR features Sn/Pb finish on copper end caps and is qualified for traditional eutectic solder reflow. It is not rated for Pb-free reflow profiles (e.g., SAC305 peak ≥245 °C), as the glass-to-metal seal and internal bonds were qualified under MIL-PRF-19500/356 using Sn/Pb assembly. Pb-free processing requires prior qualification per MIL-STD-750.

What is the maximum surge current rating for JANTX1N4980US/TR?

JANTX1N4980US/TR is rated for a nonrepetitive peak Zener surge current (I_ZSM) of 1.8 A at an 8.3 ms half-sine waveform, per MIL-STD-461 CS115. This rating assumes proper PCB layout with low-inductance traces and adequate copper pour to dissipate transient energy without exceeding junction temperature limits.

How is polarity identified on JANTX1N4980US/TR?

JANTX1N4980US/TR uses a cathode band to indicate polarity - the banded end is the cathode. The device has no alphanumeric marking on the glass body. During automated placement, vision systems must detect the band position to ensure correct orientation; reverse installation results in open-circuit behavior in shunt regulation configurations.

JANTX1N4980CUS/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

JANTX1N4980CUS/TR FAQ

1.How can I place an order for JANTX1N4980CUS/TR through Aetrix?

Please submit a Request for Quotation (RFQ) for JANTX1N4980CUS/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 JANTX1N4980CUS/TR reliable?

The price and inventory of JANTX1N4980CUS/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JANTX1N4980CUS/TR is usually 5 days.

3.What payment methods are accepted for JANTX1N4980CUS/TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for JANTX1N4980CUS/TR transactions.

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4.How is shipping managed for JANTX1N4980CUS/TR?

JANTX1N4980CUS/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your JANTX1N4980CUS/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 JANTX1N4980CUS/TR?

For technical support, including JANTX1N4980CUS/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JANTX1N4980CUS/TR requirements.

6.How does Aetrix verify that JANTX1N4980CUS/TR is sourced from the original manufacturer or authorized distributors?

All JANTX1N4980CUS/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 JANTX1N4980CUS/TR meets industry standards.

7.What is the process for return or replacement of JANTX1N4980CUS/TR?

All JANTX1N4980CUS/TR units undergo pre-shipment inspection (PSI). If there is an issue with JANTX1N4980CUS/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 JANTX1N4980CUS/TR part is unused and in its original packaging.

Return procedure for JANTX1N4980CUS/TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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