Microchip Technology JANTX1N5640A

Overview

JANTX1N5640A from Microchip Technology 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 17.1 V rated standoff voltage (VWM), 19.0 V minimum breakdown voltage (V(BR)), 27.7 V maximum clamping voltage (VC) at 54 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform - used to protect avionics power rails and signal lines from ESD, EFT, and secondary lightning surges.

For engineers reviewing the JANTX1N5640A datasheet, JANTX1N5640A pinout, JANTX1N5640A application, or JANTX1N5640A equivalent, key selection criteria include its MIL-PRF-19500/500 qualified JANTX-level screening, sub-100 ps response time, -55°C to +175°C operating temperature range, and DO-13 mechanical robustness for harsh-environment deployment.

Technical Context

The JANTX1N5640A operates as a unidirectional avalanche diode, entering controlled breakdown above its 19.0 V V(BR) threshold to clamp transients while maintaining <5 µA standby leakage at 17.1 V VWM. Its thermal resistance is 50°C/W junction-to-lead (0.375" from body), enabling reliable surge handling without thermal runaway under repetitive low-duty-cycle events.

Designed for through-hole mounting in safety-critical systems, it complies with IEC61000-4-2 (ESD), -4-4 (EFT), and -4-5 (secondary lightning) standards using 2 Ω, 12 Ω, and 42 Ω source impedances - specifically supporting Class 4 protection up to 1N5648A level per 42 Ω IEC61000-4-5 testing.

Key Specifications

Pinout & Package

DO-13 (DO-202AA) hermetically sealed metal-glass package with cathode connected to case; polarity indicated by diode symbol marking on body. Weight: 1.4 g. Tin-lead plated leads compliant with MIL-STD-750 Method 2026.

Key Features

Applications

Equivalent & Alternatives

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

Compared with JANTX1N5640A, JANTXV1N5640A adds enhanced screening for zero-defect assurance in manned flight systems, while 1N5640A offers identical electrical specs but lacks military traceability and environmental validation - making it unsuitable for deployed hardware.

Availability

JANTX1N5640A is available at Aetrix Electronics and suitable for aerospace power bus protection, avionics signal line hardening, and military vehicle electronics requiring stable component supply across extended production lifecycles.

Supply support for JANTX1N5640A 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 (formerly Microsemi) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.

The JANTX1N5640A belongs to Microchip's legacy TVS diode family engineered for extreme-environment transient suppression - targeting applications where failure is not an option, including flight-critical avionics and hardened military platforms.

FAQ

What is the standoff voltage (VWM) specification for JANTX1N5640A?

The JANTX1N5640A has a rated standoff voltage (VWM) of 17.1 V, meaning it remains nonconductive up to this reverse voltage level under normal operation. This value ensures compatibility with 15–18 V DC systems such as aircraft 28 V buses derated for ripple and transients. Exceeding VWM risks premature conduction and increased standby current, so system design must verify worst-case operating voltage stays at or below 17.1 V.

Does JANTX1N5640A meet IEC61000-4-5 secondary lightning standards?

Yes, JANTX1N5640A supports IEC61000-4-5 secondary lightning protection up to Class 4 when tested with a 42 Ω source impedance, as confirmed in the official datasheet. Its 27.7 V clamping voltage at 54 A enables compliance with the 42 Ω test profile for devices up to 1N5648A. For 12 Ω and 2 Ω configurations, it meets Class 1–3 levels depending on surge magnitude - critical for airborne avionics certification.

What is the thermal resistance of JANTX1N5640A and how does it affect surge handling?

JANTX1N5640A has a thermal resistance of 50°C/W junction-to-lead at 0.375 inches (10 mm) from the case body. This low RθJL allows rapid heat dissipation during short-duration 1500 W surges, preventing thermal runaway. When mounted per JEDEC guidelines, it sustains repeated 10/1000 µs pulses at ≤0.01% duty cycle without degradation - essential for systems exposed to frequent switching transients in engine control units.

Is JANTX1N5640A pin-compatible with other DO-13 TVS diodes?

JANTX1N5640A uses the standard DO-13 (DO-202AA) package with anode and cathode terminals arranged identically to all members of the 1N5629–1N5665A series. Its cathode is connected to the metal case, requiring mechanical grounding - a consistent layout across the family. No PCB redesign is needed when substituting within this series, provided VWM, VC, and IPP match system requirements.

How does the radiation hardness of JANTX1N5640A benefit satellite applications?

JANTX1N5640A exhibits inherent radiation tolerance per Microsemi MicroNote 050, enabling operation in low-earth orbit without shielding or derating. This characteristic reduces system mass and complexity in satellite power conditioning units, where total ionizing dose (TID) and single-event effects (SEE) could otherwise degrade conventional TVS devices. The JANTX1N5640A maintains full 1500 W surge capability after exposure, preserving fault protection integrity throughout mission life.