Microchip Technology JAN1N5644A

Overview

JAN1N5644A 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 24.3 V minimum breakdown voltage (V_BR), 25.6 V rated standoff voltage (V_WM), 41.4 V maximum clamping voltage (V_C) at 36 A peak pulse current, and 1500 W peak pulse power rating for 10/1000 µs waveform.

For engineers reviewing the JAN1N5644A datasheet, JAN1N5644A pinout, JAN1N5644A application, or JAN1N5644A equivalent, this device serves as a MIL-PRF-19500/500 qualified protection component for avionics power rails, radar interface lines, and flight control signal paths where sub-100 ps response, radiation hardness, and operation from –55 °C to +175 °C are required.

Technical Context

The JAN1N5644A operates as a unidirectional avalanche-clamping TVS diode with cathode connected to case, enabling direct mounting to chassis ground. Its 1500 W peak pulse power handling is specified at 25 °C lead temperature with ≤0.01% duty cycle, and thermal resistance is 50 °C/W junction-to-lead at 10 mm from body.

It meets IEC 61000-4-2 (ESD), -4-4 (EFT), and -4-5 (lightning surge) standards under multiple source impedances (2 Ω, 12 Ω, 42 Ω), supporting Class 2–4 secondary lightning protection depending on test configuration. Temperature coefficient of V_BR is +0.097 %/°C, confirming stable breakdown behavior across extended temperature ranges.

Key Specifications

Pinout & Package

DO-13 (DO-202AA) hermetically sealed metal-glass axial package with cathode connected to case and polarity marked by diode symbol. Case serves as cathode terminal; anode is lead 2. Weight: 1.4 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with JANTXV1N5644A, the JAN1N5644A offers reduced screening rigor but retains full hermeticity and temperature range; versus 1N5644A, it provides verified military reliability without sacrificing electrical performance-making it optimal for production avionics where qualification balance matters.

Availability

JAN1N5644A is available at Aetrix Electronics and suitable for avionics power bus protection, radar signal line hardening, and flight control actuator interface applications requiring stable component supply across long-lifecycle programs.

Supply support for JAN1N5644A 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 JAN1N5644A belongs to Microchip's legacy military TVS diode family, engineered specifically for survivability in extreme electromagnetic environments-including lightning-induced surges, ESD events, and RF interference in airborne and spaceborne platforms.

FAQ

What is the standoff voltage rating of the JAN1N5644A?

The JAN1N5644A has a rated standoff voltage (V_WM) of 25.6 V, meaning it remains nonconductive under continuous reverse bias up to this level. This value is selected to match standard 24 V aircraft and vehicle power systems while providing margin above nominal operating voltage. The device begins avalanche conduction only when transient voltages exceed its minimum breakdown voltage of 24.3 V, ensuring reliable protection without false triggering during normal operation.

Is the JAN1N5644A suitable for IEC 61000-4-5 lightning surge testing?

Yes, the JAN1N5644A is validated for IEC 61000-4-5 secondary lightning surge protection across multiple source impedances: it supports Class 4 with 42 Ω source impedance, Class 3 with 12 Ω, and Class 2 with 2 Ω. Its 1500 W peak pulse power rating and 41.4 V clamping voltage at 36 A ensure compliance when used with appropriate PCB layout-such as short traces to ground and adequate copper pour-making JAN1N5644A a proven choice for DO-160 Section 22 certification in avionics.

How does the hermetic DO-13 package benefit the JAN1N5644A in harsh environments?

The hermetically sealed DO-13 metal-glass package of the JAN1N5644A prevents moisture ingress, outgassing, and corrosion under thermal cycling, high humidity, and vacuum conditions. This construction enables operation from –55 °C to +175 °C and satisfies MIL-PRF-19500/500 mechanical and environmental requirements. Unlike plastic-packaged alternatives, the JAN1N5644A maintains stable leakage current (<5 µA at V_WM) and clamping performance over decades in sealed avionics enclosures or engine-mounted sensors.

What is the temperature coefficient of breakdown voltage for the JAN1N5644A?

The JAN1N5644A has a temperature coefficient of breakdown voltage (αV_BR) of +0.097 %/°C, indicating that V_BR increases linearly with junction temperature. This positive coefficient ensures predictable, monotonic rise in clamping threshold across its full –55 °C to +175 °C operating range-critical for deterministic surge protection in turbine engine monitoring or radar transmitter modules where thermal gradients are extreme and uncontrolled.

Can the JAN1N5644A be used as a direct replacement for the commercial 1N5644A?

No-while the JAN1N5644A shares identical electrical specifications (V_WM, V_BR, V_C, P_PP) with the 1N5644A, it is not a drop-in replacement due to mandatory military processing: JAN1N5644A undergoes MIL-PRF-19500/500 screening including burn-in, temperature cycling, and hermeticity verification. Substituting without requalification risks noncompliance in certified avionics programs. For new designs requiring qualification, JAN1N5644A must be sourced and tested as a distinct part number.