Microchip Technology JANTX1N5659A

Overview

JANTX1N5659A from Microchip (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 108 V minimum breakdown voltage (V_BR), 97.2 V rated standoff voltage (V_WM), and clamps transients to ≤173 V at 165 A peak pulse current (I_PP) under 10/1000 µs waveform - delivering 1500 W peak pulse power for secondary lightning and ESD protection in avionics power rails.

For engineers reviewing the JANTX1N5659A datasheet, JANTX1N5659A pinout, JANTX1N5659A application, or JANTX1N5659A equivalent, this part serves as a MIL-PRF-19500/500 qualified, radiation-hardened TVS for critical DC power line protection where fast response (<100 ps), hermetic sealing, and operation from –55°C to +175°C are mandatory.

Technical Context

The JANTX1N5659A operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds its 108–114 V V_BR range at 1 mA test current. Its clamping action limits surge-induced voltage to ≤173 V during 10/1000 µs transients, enabling robust protection of downstream 100 V-class power converters and sensor interfaces.

Designed for through-hole mounting in DO-13 (DO-202AA) hermetic metal-glass package, it exhibits 50°C/W junction-to-lead thermal resistance and supports forward surge current up to 200 A (8.3 ms half-sine). Polarity is marked with cathode connected to case, ensuring correct orientation in high-voltage rail protection circuits.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with JANTX1N5659A, JANTXV1N5659A offers enhanced screening and tighter parametric control for space-grade use, while 1N5659A provides commercial-grade performance at lower cost and broader availability - all sharing identical DO-13 footprint and core clamping behavior.

Availability

JANTX1N5659A is available at Aetrix Electronics and suitable for aerospace power distribution, avionics sensor interface protection, and military vehicle power systems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for JANTX1N5659A 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 legacy military product lines including high-reliability discrete semiconductors and radiation-hardened components.

The JANTX1N5659A belongs to Microchip's legacy TVS diode family originally developed by Microsemi for defense and aerospace applications, emphasizing hermetic packaging, MIL-qualified reliability, and transient suppression in extreme environmental conditions.

FAQ

What is the maximum clamping voltage of JANTX1N5659A under standard surge conditions?

The JANTX1N5659A clamps to a maximum of 173 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 165 A. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream components like DC-DC controllers remain within absolute maximum ratings.

Is JANTX1N5659A suitable for ESD protection per IEC 61000-4-2?

Yes, JANTX1N5659A is explicitly validated for ESD protection per IEC 61000-4-2 due to its sub-100 ps response time and low dynamic impedance. The device clamps human-body-model (HBM) and contact-discharge transients before sensitive analog or digital inputs experience overstress - making it appropriate for protecting RS-422 transceivers, CAN interfaces, and FPGA configuration pins in ruggedized systems.

Does JANTX1N5659A require heatsinking in typical applications?

No additional heatsink is required for JANTX1N5659A in standard surge-protection applications because it operates in pulsed mode, not continuous conduction. Its 50°C/W junction-to-lead thermal resistance is sufficient for transient dissipation when mounted with ≥10 mm lead length from PCB body. Continuous DC power dissipation is limited to 1 W at ≤125°C lead temperature - a condition rarely encountered in TVS use cases.

How does the DO-13 package of JANTX1N5659A differ from plastic-packaged TVS diodes?

The DO-13 package of JANTX1N5659A uses a welded metal-glass hermetic seal, unlike plastic axial-leaded equivalents (e.g., 1N6267 series). This eliminates moisture permeation, prevents internal corrosion under thermal cycling, and ensures long-term parameter stability in high-humidity or vacuum environments - essential for airborne and spaceborne deployments where field failure is unacceptable.

What is the polarity marking convention for JANTX1N5659A?

JANTX1N5659A uses cathode-to-case polarity: the metal case and lead marked with the diode symbol (cathode band) are electrically connected. During PCB layout, the case must be soldered to a low-inductance ground plane, and the unmarked lead (anode) connects to the protected line. This configuration ensures lowest possible clamping impedance and optimal thermal path for surge energy dissipation.