Microchip Technology JANTXV1N5646A

Overview

JANTXV1N5646A from Microchip Technology (formerly Microsemi) is a hermetically sealed, unidirectional transient voltage suppressor (TVS) diode in DO-13 metal package, designed for high-reliability military and aerospace applications. It features a 29.1 V rated standoff voltage (VWM), 32.4–34.2 V breakdown voltage (V(BR)) at 1 mA, clamps transients to ≤52.0 V at 29 A peak pulse current, and delivers 1500 W peak pulse power (10/1000 µs). It is widely deployed in avionics power rail protection against ESD, EFT, and secondary lightning surges.

For engineers reviewing the JANTXV1N5646A datasheet, JANTXV1N5646A pinout, JANTXV1N5646A application, or JANTXV1N5646A equivalent, this page provides verified electrical specifications, military-grade qualification context, DO-13 package mechanical details, IEC61000-4-2/4-4/4-5 compliance mapping, and validated alternative part options for ruggedized system design.

Technical Context

This device operates as a unidirectional avalanche diode, entering controlled breakdown above its VWM to clamp transient energy into the cathode-to-case path. Its hermetic DO-13 metal-glass construction ensures stable performance across -55°C to +175°C and inherent radiation hardness per MicroNote 050.

It meets MIL-PRF-19500/500 Class V requirements under JANTXV qualification, with tight parameter tolerances (e.g., ±5% V(BR) for "A" suffix), 100 ps response time, and thermal resistance of 50°C/W junction-to-lead - enabling robust surge handling without derating in leaded through-hole layouts.

Key Specifications

Pinout & Package

Hermetically sealed DO-13 (DO-202AA) metal-glass package with axial leads; cathode terminal electrically bonded to case and marked by diode symbol on body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional TVS applications.

Compared with JANTXV1N5646A, 1N5646A offers identical electrical performance at lower cost but lacks military screening, while JANTXV1N5645A provides lower clamping voltage for 24 V systems - making the original optimal for 28 V aerospace rails requiring full Class V assurance.

Availability

JANTXV1N5646A is available at Aetrix Electronics and suitable for aerospace power distribution, avionics sensor interface, and military vehicle electronics requiring stable component supply across extended temperature and radiation environments.

Supply support for JANTXV1N5646A 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

Microchip Technology acquired Microsemi in 2018 and maintains its high-reliability discrete portfolio, including radiation-hardened and military-qualified components for defense, aerospace, and industrial markets.

JANTXV1N5646A belongs to Microchip's legacy Microsemi TVS diode family, engineered specifically for mission-critical transient suppression in avionics, satellite power systems, and tactical electronics where hermeticity and MIL-spec compliance are mandatory.

FAQ

What is the standoff voltage (VWM) specification for JANTXV1N5646A?

The JANTXV1N5646A has a rated standoff voltage (VWM) of 29.1 V, meaning it remains nonconductive up to this reverse voltage level under normal operation. This value is selected to safely exceed typical 28 V aircraft bus nominal voltages while providing sufficient margin before avalanche conduction begins at its specified V(BR) range of 32.4–34.2 V. The JANTXV1N5646A datasheet confirms this parameter is guaranteed across temperature and lifetime under MIL-PRF-19500 screening.

Is JANTXV1N5646A suitable for IEC61000-4-5 secondary lightning protection?

Yes, JANTXV1N5646A is certified for IEC61000-4-5 secondary lightning protection up to Class 4 with 42 Ω source impedance, supporting peak pulse currents of 29 A and clamping to 52.0 V. Its 1500 W peak pulse power rating and sub-100 ps response ensure effective energy diversion during standardized surge waveforms. The JANTXV1N5646A qualification documentation explicitly lists compliance with this standard for low-voltage distribution systems in avionics and military platforms.

What package type does JANTXV1N5646A use, and how is polarity indicated?

JANTXV1N5646A uses the DO-13 (DO-202AA) hermetically sealed metal-glass package. Polarity is indicated by a molded diode symbol on the case body, with the cathode (marked terminal) internally connected to the metal case - requiring direct soldering to a grounded copper plane. Lead 1 is cathode/case; Lead 2 is anode. This configuration is confirmed in the mechanical drawings on page 6 of the JANTXV1N5646A datasheet and aligns with JEDEC DO-13 standards.

How does JANTXV1N5646A differ from commercial 1N5646A in terms of qualification?

JANTXV1N5646A undergoes full MIL-PRF-19500/500 Class V screening - including temperature cycling, burn-in, and lot traceability - whereas 1N5646A is commercial-grade with identical electrical specs but no military qualification. The JANTXV1N5646A prefix denotes verification to military environmental and reliability standards, making it mandatory for DoD contracts and space-qualified hardware where long-term parametric stability and failure rate modeling are required.

What is the maximum clamping voltage (VC) of JANTXV1N5646A under surge conditions?

The JANTXV1N5646A has a maximum clamping voltage (VC) of 52.0 V when subjected to its rated 29 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value represents the worst-case voltage imposed on protected circuitry during transient events and is measured at 25°C per the official JANTXV1N5646A datasheet. Designers use this parameter to verify that downstream ICs remain within their absolute maximum voltage ratings during surge conditions.