Microchip Technology JANTX1N5655A

Overview

JANTX1N5655A from Microchip Technology (formerly Microsemi) is a hermetically sealed, unidirectional transient voltage suppressor (TVS) diode in DO-13 metal package, designed for high-reliability aerospace and military systems. It features 73.8 V minimum breakdown voltage (V_BR), 66.4 V rated standoff voltage (V_WM), 118 V maximum clamping voltage (V_C) at 12.7 A peak pulse current (I_PP), and 1500 W peak pulse power rating per 10/1000 µs waveform - used to protect avionics power rails and signal lines against ESD, EFT, and secondary lightning surges.

For engineers reviewing the JANTX1N5655A datasheet, JANTX1N5655A pinout, JANTX1N5655A application, or JANTX1N5655A equivalent, this part delivers radiation-hardened, MIL-PRF-19500/500 qualified surge suppression with sub-100 ps response time, hermetic DO-13 packaging, and verified IEC 61000-4-2/4-4/4-5 compliance for Class 3 secondary lightning protection (2 Ω and 42 Ω source impedances).

Technical Context

The JANTX1N5655A operates as a unidirectional avalanche diode, entering controlled breakdown above its 66.4 V standoff voltage to clamp transients while maintaining low leakage (<5 µA at V_WM). Its DO-13 metal-glass package provides hermetic sealing and junction-to-lead thermal resistance of 50 °C/W, enabling operation from –55 °C to +175 °C ambient.

It is rated for 1500 W non-repetitive peak pulse power (10/1000 µs), with clamping performance validated at 118 V @ 12.7 A and temperature coefficient of breakdown voltage αV_BR = 0.105 %/°C - critical for stable overvoltage protection across extended temperature ranges in airborne platforms.

Key Specifications

Pinout & Package

DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads; cathode terminal electrically connected 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 protection applications.

Compared with JANTX1N5655A, JANTXV1N5655A adds radiation assurance and tighter parametric control for spaceflight use, while 1N5655A offers identical clamping performance without military screening - enabling cost-optimized prototyping or non-mission-critical deployments.

Availability

JANTX1N5655A is available at Aetrix Electronics and suitable for aerospace power bus protection, avionics signal line hardening, and military vehicle electronics requiring stable component supply with full MIL-PRF-19500/500 traceability and long-term obsolescence management.

Supply support for JANTX1N5655A 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 the JANTX-series TVS diodes, with full qualification and manufacturing continuity.

The JANTX1N5655A belongs to Microchip's high-reliability discrete protection portfolio, engineered specifically for defense, aerospace, and industrial systems demanding hermetic packaging, extreme temperature operation, and MIL-STD compliance.

FAQ

What is the maximum clamping voltage of the JANTX1N5655A under standard test conditions?

The JANTX1N5655A has a maximum clamping voltage (V_C) of 118 V at 12.7 A peak pulse current (I_PP) using the 10/1000 µs waveform. This value is measured per JEDEC standards and ensures downstream components rated for ≤120 V are protected during surge events. The JANTX1N5655A achieves this clamping performance while maintaining sub-100 ps response time and hermetic DO-13 reliability.

Is the JANTX1N5655A suitable for IEC 61000-4-5 secondary lightning protection?

Yes, the JANTX1N5655A is certified for IEC 61000-4-5 Class 3 secondary lightning protection with both 42 Ω and 2 Ω source impedances. Its 1500 W peak pulse rating and 118 V clamping voltage meet DO-160 Section 22 requirements for airborne equipment. The JANTX1N5655A's military qualification and hermetic package further ensure consistent performance under repeated surge stress in flight-critical systems.

How does the JANTX1N5655A differ from the commercial 1N5655A variant?

The JANTX1N5655A differs from the commercial 1N5655A through full MIL-PRF-19500/500 qualification, including extended temperature screening (–55 °C to +175 °C), lot traceability, and tighter V_BR tolerance (±10%). Electrically, both share identical V_WM (66.4 V), V_C (118 V), and package (DO-13). The JANTX1N5655A is mandatory for defense contracts; the 1N5655A serves cost-sensitive commercial prototypes.

What is the thermal resistance specification for the JANTX1N5655A?

The JANTX1N5655A has a junction-to-lead thermal resistance (R_θJL) of 50 °C/W when measured at 0.375 inches (10 mm) from the case body. This enables efficient heat dissipation into chassis mounts or PCB copper pours, supporting continuous operation at +175 °C ambient. The JANTX1N5655A's hermetic metal package contributes to this low thermal resistance, unlike plastic-packaged alternatives.

Can the JANTX1N5655A be used for ESD protection per IEC 61000-4-2?

Yes, the JANTX1N5655A is explicitly rated for ESD protection per IEC 61000-4-2 due to its <100 ps response time and low clamping voltage. It suppresses 8 kV contact and 15 kV air discharge events by diverting current away from sensitive inputs before damage occurs. The JANTX1N5655A's military screening ensures consistent ESD performance across temperature extremes and lifetime cycling - critical for field-deployed avionics.