Microchip Technology JANTX1N4980DUS/TR

Overview

JANTX1N4980DUS/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 ±1% (D suffix), dynamic impedance of 720 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 JANTX1N4980DUS/TR datasheet, JANTX1N4980DUS/TR pinout, JANTX1N4980DUS/TR application, or JANTX1N4980DUS/TR equivalent, this part is selected for mission-critical voltage regulation where long-term stability, radiation tolerance, and zero voids in glass sealing are mandatory design requirements.

Technical Context

This device belongs to the MIL-PRF-19500/356 qualified 1N4954US–1N4996US family and uses voidless hard-glass construction with internal Category I metallurgical bonds. Its Zener breakdown mechanism delivers stable regulation across 10%–50% of maximum Zener current (IZM = 1.8 A), with temperature coefficient αVZ = +0.100 %/°C at 15 mA.

It features triple-layer passivation, nonsensitivity to ESD per MIL-STD-750 Method 1020, and inherent radiation hardness documented in MicroNote 050. The "D" suffix confirms ±1% voltage tolerance, and "TR" denotes tape-and-reel packaging per EIA-481-B.

Key Specifications

Pinout & Package

Package: Hermetically sealed voidless hard-glass case with tungsten slugs, "E" package (also designated D-5B), cathode indicated by band, copper end caps with Sn/Pb finish, weight 539 mg.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Compared with JANTX1N4980DUS/TR, the JANTXV variant adds screening rigor without altering Zener performance, while the commercial 1N4980DUS/TR retains identical electrical behavior but omits military test documentation and extended high-temperature validation.

Availability

JANTX1N4980DUS/TR is available at Aetrix Electronics and suitable for aerospace power bus protection, satellite voltage reference, and downhole instrumentation requiring stable component supply with full traceability and long-lifecycle support.

Supply support for JANTX1N4980DUS/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 JANTX1N4980DUS/TR belongs to Microsemi's MIL-PRF-19500/356 qualified Zener diode product line, engineered for voltage regulation in extreme-environment electronics where failure is not an option.

FAQ

What is the Zener voltage tolerance of JANTX1N4980DUS/TR?

JANTX1N4980DUS/TR has a Zener voltage tolerance of ±1%, indicated by the "D" suffix in its part number. This means its nominal 82 V Zener voltage is guaranteed between 81.18 V and 82.82 V at 15 mA test current and 25 °C ambient. The tolerance remains valid across its full operating temperature range per MIL-PRF-19500/356 screening.

Does JANTX1N4980DUS/TR require derating above 140 °C end-cap temperature?

Yes, JANTX1N4980DUS/TR must be linearly derated above 140 °C end-cap temperature, reaching zero power dissipation at 175 °C. Derating follows a slope of –35.7 mW/°C above 140 °C. This requirement is defined in the MAXIMUM RATINGS table of the SD44A datasheet and applies regardless of ambient or board layout conditions.

Is JANTX1N4980DUS/TR compatible with lead-free reflow processes?

JANTX1N4980DUS/TR features Sn/Pb-finished copper end caps and is not qualified for lead-free reflow. Its maximum peak reflow temperature is limited to 235 °C per MIL-STD-202 Method 210. Lead-free profiles exceeding 260 °C may compromise the hermetic glass-to-metal seal integrity and voidless construction of the JANTX1N4980DUS/TR.

What is the meaning of "US" in JANTX1N4980DUS/TR?

The "US" suffix in JANTX1N4980DUS/TR denotes the surface-mount glass package configuration, distinguishing it from axial-leaded equivalents (e.g., JANTX1N4980D). This suffix is standardized across Microsemi's 1N49xxUS series and confirms the "E" package (D-5B) outline, voidless hermetic construction, and tape-and-reel delivery format indicated by "TR".

How does the temperature coefficient of JANTX1N4980DUS/TR affect regulation accuracy?

JANTX1N4980DUS/TR has a positive temperature coefficient of +0.100 %/°C at 15 mA, meaning its Zener voltage increases by approximately 82 mV per °C rise in junction temperature. Over a –65 °C to +175 °C range, this yields a total shift of ~24.6 V - a key factor in high-precision reference designs where active compensation or tight thermal management is required to maintain regulation accuracy.