Microchip Technology JANTXV1N4618D-1/TR

Overview

JANTXV1N4618D-1/TR from Microsemi is a 2.7 V, 1% tolerance, 500 mW metallurgically bonded glass Zener diode in DO-35 package, qualified to JANTXV level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace power conditioning circuits.

For engineers reviewing the JANTXV1N4618D-1/TR datasheet, JANTXV1N4618D-1/TR pinout, JANTXV1N4618D-1/TR application, or JANTXV1N4618D-1/TR equivalent, this page delivers verified Zener voltage, temperature coefficient, dynamic impedance, noise density, and military qualification status required for radiation-hardened analog reference design and precision biasing in harsh-environment systems.

Technical Context

This device operates as a reverse-biased voltage reference with a nominal Zener voltage of 2.7 V at 250 mA test current, exhibiting a temperature coefficient of −0.075 %/°C and dynamic impedance of 1500 Ω at IZT. Its metallurgical bond ensures stable breakdown characteristics under thermal cycling.

Designed for operation in the Zener breakdown region, it delivers low noise density (1 µV/√Hz), minimal capacitance (typical <2 pF), and ESD insensitivity per MIL-STD-750 Method 1020-enabling use in low-noise analog front-ends and precision voltage clamping where stability across −65 °C to +175 °C is mandatory.

Key Specifications

Pinout & Package

DO-35 (DO-204AH) hermetically sealed axial-leaded glass package with cathode indicated by band; leads are tin-lead or RoHS-compliant matte-tin plated and solderable per MIL-STD-750 Method 2026.

Key Features

Applications

Equivalent & Alternatives

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

Compared with JANTXV1N4618D-1/TR, JANTXV1N4618US-1 offers identical regulation performance in a surface-mount form factor, while 1N4618UR-1 provides commercial-grade cost savings without military screening or radiation tolerance-making the original JANTXV1N4618D-1/TR the sole choice for flight-qualified analog references.

Availability

JANTXV1N4618D-1/TR is available at Aetrix Electronics and suitable for aerospace power conditioning, precision sensor biasing, avionics analog calibration, and ruggedized industrial control requiring stable component supply across extended temperature and radiation environments.

Supply support for JANTXV1N4618D-1/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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.

The 1N4614–1N4627 series was designed specifically to deliver mil-qualified, low-noise Zener regulation in hermetic glass packages for mission-critical voltage reference and clamping applications where long-term stability under stress is non-negotiable.

FAQ

What is the Zener voltage tolerance of JANTXV1N4618D-1/TR?

JANTXV1N4618D-1/TR has a Zener voltage tolerance of ±1%, denoted by the "D" suffix in its part number per Microsemi's nomenclature. This is confirmed in the Electrical Characteristics table on Page 3 of T4-LDS-0245-2 Rev. 1, where V_Z = 2.7 V at I_ZT = 250 mA with 1% tolerance. The tighter tolerance reduces calibration overhead in precision analog systems compared to standard 5% variants like JANTXV1N4618-1/TR.

Is JANTXV1N4618D-1/TR suitable for high-temperature operation?

Yes, JANTXV1N4618D-1/TR is rated for junction and storage temperatures from −65 °C to +175 °C per Maximum Ratings table on Page 1. Its metallurgical bond construction and hermetic DO-35 package enable reliable operation in extended-temperature environments such as avionics bays and downhole drilling electronics-validated through MIL-PRF-19500/435 JANTXV screening.

What does the "TR" suffix indicate in JANTXV1N4618D-1/TR?

The "TR" suffix indicates tape-and-reel packaging per EIA-296 standard, enabling automated pick-and-place assembly. Per Page 2 of T4-LDS-0245-2 Rev. 1, this option is available for all variants in the series; JANTXV1N4618D-1/TR is supplied in reel format with standard quantities defined by factory consultation-not bulk or ammo-pack.

How does the noise performance of JANTXV1N4618D-1/TR compare to higher-voltage Zeners?

JANTXV1N4618D-1/TR exhibits 1 µV/√Hz noise density at 2.7 V, consistent with the trend described in the Features section: noise falls rapidly below 6.8 V, reaching 1 µV/√Hz at lower voltages. This makes it significantly quieter than 6.8 V+ Zeners (e.g., 40 µV/√Hz), supporting ultra-low-noise biasing in sensitive analog front-ends where signal integrity is critical.

Does JANTXV1N4618D-1/TR require derating at elevated ambient temperatures?

Yes, JANTXV1N4618D-1/TR must be linearly derated starting at 50 °C lead temperature, reaching zero power at 175 °C (Page 1, Note 2). On a typical FR4 board, derating begins at 25 °C ambient, reducing from 500 mW to zero at 175 °C. Engineers must apply thermal modeling using R_θJL = 250 °C/W and layout-specific copper area to ensure safe operation under worst-case thermal conditions.