Semtech Corporation JANTXV1N5809US

Overview

JANTXV1N5809US from Microsemi (now Microchip) is a hermetically sealed, axial-leaded silicon power rectifier diode rated for 1000 V PIV and 9 A average forward current, optimized for high-reliability military and aerospace power conversion, input rectification, and snubber circuits. It features low forward voltage drop (1.25 V at 9 A), fast recovery time (≤500 ns), and operates across –65 °C to +175 °C.

For engineers reviewing the JANTXV1N5809US datasheet, pinout, applications, or equivalent options, key selection criteria include its MIL-PRF-19500/437 qualification, hermetic TO-204AA (DO-5) metal package, surge current rating (180 A peak), thermal resistance (1.1 °C/W junction-to-case), and compliance with JAN/JANTXV screening levels including burn-in, temperature cycling, and lot acceptance testing.

Technical Context

The JANTXV1N5809US implements a planar-diffused PN-junction structure with gold-doped lifetime control to achieve fast, soft recovery characteristics essential for reducing EMI in high-frequency switching supplies. Its hermetic metal-can construction ensures long-term reliability under extreme thermal, mechanical, and radiation stress.

Designed for use in primary-side rectification of offline AC-DC converters, DC-DC converter inputs, and high-voltage snubbers, it delivers stable forward conduction and reverse blocking performance across its full military temperature range without derating below 125 °C ambient - enabled by its low R_θJC and high T_J(max) of 175 °C.

Key Specifications

Pinout & Package

Package: Hermetic TO-204AA (DO-5) metal can with axial leads - cathode identified by band; case electrically connected to cathode. Requires solderable nickel-iron alloy leads and glass-to-metal seal per MIL-STD-202.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-reliability power rectifier applications.

Compared with JANTX1N5809US and V60100C-E3/45, the JANTXV1N5809US uniquely combines 1000 V PIV, 9 A average current, hermetic reliability, and MIL-PRF-19500/437 JANTXV screening - making it irreplaceable in airborne and spaceborne high-voltage rectification where failure modes are unacceptable.

Availability

JANTXV1N5809US is available at Aetrix Electronics and suitable for aerospace power supplies, avionics rectification, and satellite power conditioning requiring stable component supply across extended procurement cycles and obsolescence-sensitive programs.

Supply support for JANTXV1N5809US 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

Microsemi (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs, discrete power devices, and radiation-hardened components for defense, aerospace, and industrial markets.

The JANTXV1N5809US belongs to Microsemi's legacy military diode product line, engineered specifically for mission-critical power conversion where long-term parametric stability, hermetic integrity, and rigorous process control are non-negotiable.

FAQ

What is the maximum junction temperature rating for JANTXV1N5809US?

The JANTXV1N5809US has a maximum junction temperature (T_J(max)) of +175 °C, validated per MIL-PRF-19500/437. This rating enables operation in high-ambient environments such as engine bays or sealed avionics enclosures without thermal derating below 125 °C ambient. The JANTXV1N5809US maintains full electrical specifications across its entire –65 °C to +175 °C junction temperature range.

Is JANTXV1N5809US compatible with lead-free reflow soldering processes?

No - the JANTXV1N5809US uses a hermetic TO-204AA (DO-5) metal package with tin-lead (SnPb) plated leads and is intended for wave or hand soldering per MIL-STD-202 Method 210. Lead-free reflow exceeds its glass-to-metal seal thermal limit and risks cracking the hermetic seal. The JANTXV1N5809US must be mounted prior to PCB reflow or installed using post-reflow soldering techniques.

Does JANTXV1N5809US require a heatsink in typical applications?

The JANTXV1N5809US achieves 1.1 °C/W junction-to-case thermal resistance and is designed for direct chassis mounting. In most applications - including 9 A continuous conduction at 25 °C ambient - no external heatsink is required if mounted to ≥2 in² of 2-oz copper or aluminum chassis with thermal interface material. The JANTXV1N5809US leverages its metal case as both cathode and primary thermal path.

How does the recovery time of JANTXV1N5809US compare to standard rectifiers?

The JANTXV1N5809US features a guaranteed reverse recovery time (t_rr) of ≤500 ns, achieved via gold doping to control carrier lifetime. This is up to 5× faster than non-doped 1000 V rectifiers (typically 2–3 µs), reducing switching losses and EMI in high-frequency converters. The JANTXV1N5809US maintains this t_rr consistently across its full military temperature range.

Can JANTXV1N5809US be used in parallel for higher current handling?

Parallel operation of JANTXV1N5809US devices is not recommended due to mismatch in forward voltage (V_F) and thermal coupling limitations. Its 1.25 V V_F tolerance and lack of integrated current-sharing features risk current hogging and thermal runaway. For >9 A requirements, select a single higher-rated device or redesign with active current balancing - the JANTXV1N5809US is characterized and qualified as a discrete unit only.