Microchip Technology JANTX1N5651A

Overview

JANTX1N5651A 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 50.4 V minimum breakdown voltage (V_BR), 45.4 V rated standoff voltage (V_WM), 80.5 V maximum clamping voltage (V_C) at 18.6 A peak pulse current (I_PP), and 1500 W peak pulse power rating per 10/1000 µs waveform - commonly deployed to protect avionics power rails and signal lines against secondary lightning surges per IEC61000-4-5 with 12 Ω source impedance (Class 2).

For engineers reviewing the JANTX1N5651A datasheet, JANTX1N5651A pinout, JANTX1N5651A application, or JANTX1N5651A equivalent, key selection criteria include its MIL-PRF-19500/500 JANTX qualification, hermetic DO-13 package, sub-100 ps response time, -55°C to +175°C operating range, and precise 5% V_BR tolerance ('A' suffix), critical for deterministic overvoltage protection in radiation-hardened systems.

Technical Context

The JANTX1N5651A operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds V_WM = 45.4 V, clamping transients to ≤80.5 V within <100 ps. Its DO-13 metal-glass package provides hermetic sealing and low thermal resistance (50°C/W junction-to-lead), enabling reliable operation under extreme temperature cycling and high-humidity environments typical of airborne platforms.

It is rated for 1500 W non-repetitive peak pulse power (10/1000 µs), supports forward surge current up to 200 A (8.3 ms half-sine), and exhibits a temperature coefficient of V_BR of +0.103%/°C - ensuring predictable voltage drift across its full -55°C to +175°C operational range without derating penalties beyond 125°C lead temperature.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with JANTX1N5651A, JANTXV1N5651A adds radiation assurance and extended screening for space-grade use, while 1N5651A omits all military qualification - making JANTX1N5651A the optimal balance of proven reliability, cost, and certification readiness for airborne platforms.

Availability

JANTX1N5651A is available at Aetrix Electronics and suitable for aircraft power bus protection, avionics signal line hardening, and engine control unit (ECU) input safeguarding requiring stable component supply across extended production lifecycles and defense procurement cycles.

Supply support for JANTX1N5651A 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 analog and discrete product portfolio, including military-qualified TVS diodes, for aerospace, defense, and industrial markets.

The JANTX1N5651A belongs to Microchip's legacy Microsemi TVS family, engineered specifically for ruggedized electromagnetic protection in avionics, radar, and flight-critical systems where hermeticity, radiation tolerance, and MIL-spec compliance are non-negotiable.

FAQ

What is the clamping voltage of JANTX1N5651A at its rated peak pulse current?

The JANTX1N5651A has a maximum clamping voltage (V_C) of 80.5 V when subjected to its rated peak pulse current (I_PP) of 18.6 A under the standard 10/1000 µs waveform. This value is measured at T_A = 25°C and defines the upper voltage limit imposed on protected circuits during surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.

Is JANTX1N5651A qualified to MIL-PRF-19500/500?

Yes, JANTX1N5651A is fully qualified to MIL-PRF-19500/500 per the "JANTX" level, which includes rigorous screening for mechanical shock, vibration, temperature cycling, and hermeticity. The 'A' suffix denotes tighter 5% V_BR tolerance, and the JANTX prefix confirms compliance with military processing, traceability, and test documentation requirements - essential for DoD and FAA-approved hardware.

What package type does JANTX1N5651A use, and why is it significant?

JANTX1N5651A uses the DO-13 (DO-202AA) hermetically sealed metal-glass package. This construction prevents moisture ingress and oxidation, supports operation from -55°C to +175°C, and provides superior thermal dissipation (50°C/W junction-to-lead). Its cathode-connected case enables low-inductance grounding - a decisive advantage over plastic packages in high-energy surge environments like aircraft power systems.

Can JANTX1N5651A be used for ESD protection per IEC61000-4-2?

Yes, JANTX1N5651A is explicitly validated for ESD protection per IEC61000-4-2 due to its sub-100 ps response time and ability to clamp ±15 kV contact discharges. Its 45.4 V V_WM allows safe integration on 28 V or 36 V avionics buses without leakage concerns, and its hermetic DO-13 package ensures long-term stability in high-humidity flight environments where polymer-packaged alternatives may degrade.

How does JANTX1N5651A differ from commercial 1N5651A?

JANTX1N5651A differs from commercial 1N5651A through full MIL-PRF-19500/500 JANTX qualification - including lot traceability, extended environmental testing, and screening for defects. While both share identical electrical parameters (V_WM, V_BR, V_C), only JANTX1N5651A carries military certification required for flight hardware, making it unsuitable to substitute with 1N5651A in certified avionics or defense systems.