Microchip Technology 469-04

Overview

469-04 from Microsemi is a hermetically sealed, single-phase 10 A bridge rectifier qualified to MIL-PRF-19500/469 at JANTXV level, with 800 V working peak reverse voltage per leg, 100 A forward surge current capability, and 5 °C/W junction-to-case thermal resistance. It serves as the primary AC-to-DC conversion stage in high-reliability power supplies for aerospace and defense systems.

For engineers reviewing the 469-04 datasheet, 469-04 pinout, 469-04 application, or 469-04 equivalent, key selection criteria include its military qualification status, glass-encapsulated diode legs, aluminum case isolation, controlled avalanche behavior, and radiation-hardened construction per MicroNote 050.

Technical Context

This device implements a four-diode single-phase full-wave bridge topology with electrically isolated aluminum case and voidless glass encapsulation per leg. Each diode leg features Category 1 metallurgical bonds and triple-layer passivation, enabling operation from –65 °C to +150 °C with 2.5 µs reverse recovery time at IF = 0.5 A.

The 469-04 delivers 10 A average DC output current at TC = +55 °C (derating linearly to 6 A at +100 °C), supported by low thermal resistance (R_θJC = 5 °C/W) and 2800 V isolation voltage. Its RoHS-compliant variant uses matte tin terminations instead of Sn/Pb.

Key Specifications

Pinout & Package

Package: MD - hermetically sealed aluminum case with glass-encapsulated diode legs, 10 g mass, dimensions per RF01149 Rev. A page 6 (C1 = 0.367–0.375", W = 0.735–0.750", H1 ≤ 0.570"). Terminals are marked AC (input), + (cathode output), – (anode output); terminal 1 indexed mechanically.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VMI 469-04 and IXYS MDA100-16N1, the 469-04 uniquely combines JANTXV qualification, 10 A DC rating, 800 V VRWM, and inherent radiation hardness - making it irreplaceable in flight-critical and nuclear-grade systems where certification and TID tolerance are mandatory.

Availability

469-04 is available at Aetrix Electronics and suitable for avionics power supplies, radar transmitter modulators, spacecraft EPS, and nuclear instrumentation requiring stable component supply with full traceability and long-term obsolescence management.

Supply support for 469-04 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 Corporation (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.

The 469-04 belongs to Microsemi's MIL-PRF-19500/469 qualified rectifier bridge family, engineered specifically for mission-critical power conversion where failure is not an option.

FAQ

What is the maximum working peak reverse voltage per leg for the 469-04?

The 469-04 has a VRWM of 800 V per leg, verified per MIL-PRF-19500/469 test conditions. This value is measured excluding all transient voltages and defines the maximum continuous sinusoidal reverse voltage the device can block without breakdown. The 469-04 achieves this rating using voidless glass encapsulation and Category 1 metallurgical bonds, ensuring stability under thermal stress and vibration.

Is the 469-04 qualified to JANTXV level per MIL-PRF-19500/469?

Yes, the 469-04 is fully qualified to JANTXV level per MIL-PRF-19500/469, including screening for parametric limits, burn-in, thermal shock, and life testing. Its qualification documentation is covered under Microsemi's RF01149 Rev. A specification. The 469-04 also complies with MicroNote 050 for radiation hardness, distinguishing it from commercial-grade alternatives.

What is the thermal resistance junction-to-case (R_θJC) for the 469-04?

The 469-04 has an R_θJC of 5 °C/W, measured per MIL-STD-750 Method 1071. This low value results from direct copper-to-aluminum case bonding and optimized internal thermal paths. When mounted to a properly sized heatsink or chassis, the 469-04 sustains 10 A average current at TC = +55 °C - critical for compact, conduction-cooled military power supplies.

Does the 469-04 have RoHS-compliant packaging options?

Yes, RoHS-compliant versions of the 469-04 are available with matte tin terminations instead of Sn/Pb solder dip. These variants retain full JANTXV qualification and identical electrical performance, including VRWM, IO, and trr. The RoHS marking is indicated by "e3" suffix in the part nomenclature per RF01149 Rev. A.

What is the reverse recovery time (trr) of the 469-04 and under what conditions is it specified?

The 469-04 has a trr of 2.5 µs, measured at IF = 0.5 A, IRM = 1.0 A, and IR(REC) = 0.250 A per MIL-STD-750 Method 2050. This parameter reflects the diode leg's ability to transition from conduction to blocking state and directly impacts switching losses in phase-controlled rectifiers. The consistent 2.5 µs value across the 469-01–469-05 series confirms process uniformity in Microsemi's glass-encapsulated die fabrication.