Microchip Technology JANTX1N4105D-1

Overview

JANTX1N4105D-1 from Microsemi is a 1% tolerance, 11.0 V, 500 mW metallurgically bonded glass Zener diode in DO-35 package, qualified to JANTX level per MIL-PRF-19500/435 for high-reliability voltage regulation in aerospace and defense power supplies.

For engineers reviewing the JANTX1N4105D-1 datasheet, JANTX1N4105D-1 pinout, JANTX1N4105D-1 application, or JANTX1N4105D-1 equivalent, key selection criteria include Zener voltage tolerance (±1%), temperature coefficient (+0.080 %/°C), dynamic impedance (200 Ω at 250 mA), noise density (1 µV/√Hz), and military-grade thermal derating behavior.

Technical Context

This device operates as a precision shunt voltage regulator with a nominal Zener voltage of 11.0 V at 250 mA test current, exhibiting +0.080 %/°C temperature coefficient and 200 Ω dynamic impedance at IZT. Its metallurgical bond construction ensures stable breakdown characteristics under thermal cycling and radiation exposure.

Designed for operation in the reverse-biased breakdown region, JANTX1N4105D-1 delivers regulated output with ≤0.05 µA reverse leakage at 8.5 V and supports continuous power dissipation up to 500 mW at 25 °C, linearly derated to zero at 175 °C junction temperature.

Key Specifications

Pinout & Package

DO-35 (DO-204AH) axial-leaded hermetically sealed 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 JANTX1N4105D-1, the 1N4105US-1 offers identical regulation performance in a smaller footprint but eliminates manual lead forming and axial mounting flexibility, while JANTXV1N4105D-1 adds cost and lead time for additional reliability validation without changing electrical behavior.

Availability

JANTX1N4105D-1 is available at Aetrix Electronics and suitable for aerospace power references, defense system voltage monitors, and avionics sensor biasing requiring stable component supply across extended temperature and radiation environments.

Supply support for JANTX1N4105D-1 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.

JANTX1N4105D-1 belongs to the MIL-qualified 1N4099–1N4135 Zener series engineered for precision voltage regulation in harsh-environment electronics where long-term parametric stability and radiation hardness are mandatory.

FAQ

What is the Zener voltage tolerance for JANTX1N4105D-1?

JANTX1N4105D-1 has a Zener voltage tolerance of ±1%, denoted by the "D" suffix in its part number per MIL-PRF-19500/435 nomenclature. This means its nominal 11.0 V Zener voltage is guaranteed between 10.89 V and 11.11 V at 250 mA test current and 25 °C ambient. The tighter tolerance supports high-accuracy reference applications where standard ±5% devices would require post-calibration trimming. JANTX1N4105D-1 maintains this specification across its qualified temperature range.

Is JANTX1N4105D-1 suitable for space-grade applications?

JANTX1N4105D-1 is qualified to JANTX level per MIL-PRF-19500/435 and exhibits inherent radiation hardness per Microsemi MicroNote 050, making it suitable for many space-qualified subsystems. However, full space-grade qualification typically requires JANS-level screening and additional radiation testing (e.g., TID, SEE). For missions demanding highest assurance, JANS1N4105D-1 or JANTXV1N4105D-1 may be specified. JANTX1N4105D-1 remains widely used in LEO satellite power regulation where its proven metallurgical bond and hermetic seal provide sufficient margin.

What is the maximum reverse leakage current for JANTX1N4105D-1?

The maximum reverse leakage current (I_R) for JANTX1N4105D-1 is 0.05 µA at 8.5 V reverse voltage and 25 °C, per the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This ultra-low leakage ensures minimal parasitic loading on sensitive reference nodes and contributes to low-power standby operation. The value is measured under standardized test conditions and remains valid across the full –65 to +175 °C junction temperature range, supporting reliable performance in wide-temperature applications. JANTX1N4105D-1 achieves this via optimized metallurgical bonding and hermetic glass encapsulation.

How does the temperature coefficient affect JANTX1N4105D-1's regulation accuracy?

JANTX1N4105D-1 has a temperature coefficient (α_VZ) of +0.080 %/°C, meaning its Zener voltage increases by approximately 8.8 mV per degree Celsius rise above 25 °C. Over a –55 to +125 °C operating range, this contributes up to ±12.8 mV drift relative to nominal 11.0 V. When combined with its ±1% initial tolerance, total regulation error remains within ±0.5% across the full range-critical for precision analog circuits. JANTX1N4105D-1's predictable TC allows accurate compensation in system-level calibration routines.

Can JANTX1N4105D-1 be used in surface-mount designs?

JANTX1N4105D-1 uses the axial-leaded DO-35 (DO-204AH) package and is not designed for direct surface-mount assembly. For SMT implementations, Microsemi offers the functionally identical 1N4105US-1 in DO-213AA package. While JANTX1N4105D-1 can be manually mounted on SMT boards using through-hole pads or adapter carriers, doing so violates JEDEC mechanical standards and risks mechanical stress-induced failure during thermal cycling. For new designs targeting automated assembly, 1N4105US-1 is the recommended alternative. JANTX1N4105D-1 remains optimal for legacy through-hole systems and prototyping where lead-forming flexibility is needed.