Microchip Technology APTDX450A120D16AG

Overview

APTDX450A120D16AG from Microchip Technology is a 1200V, 450A fast-recovery diode phase-leg power module with aluminum nitride (AlN) substrate, M6 power connectors, and 4 kV RMS isolation voltage. It delivers soft-recovery characteristics, low junction-to-case thermal resistance (0.116°C/W), and operates up to 175°C junction temperature - designed for high-power industrial rectification in UPS, induction heating, and welding systems.

For engineers reviewing the APTDX450A120D16AG datasheet, APTDX450A120D16AG pinout, APTDX450A120D16AG application, or APTDX450A120D16AG equivalent, key selection criteria include peak repetitive reverse voltage (1200 V), forward current rating at TC = 95°C (450 A), reverse recovery charge (85.8 µC at TJ = 175°C), thermal isolation capability, and direct heatsink-mounting compatibility.

Technical Context

This device integrates two ultra-fast, soft-recovery diodes in a phase-leg configuration within a single isolated package. Its AlN substrate enables low R_thJC (0.116°C/W) and supports high-power density operation without external insulation layers.

The module features M6 screw terminals rated for 3–5 N·m torque and provides 4000 V RMS isolation between any terminal and case - enabling safe integration into grounded high-voltage systems such as three-phase rectifier bridges and IGBT-based inverters.

Key Specifications

Pinout & Package

APTDX450A120D16AG uses a dual-diode phase-leg configuration in an isolated, baseplate-mounted power module package with M6 screw terminals. The package includes three main terminals: Anode 1 (A1), Cathode (K), and Anode 2 (A2), arranged per Figure 1 (Electrical Diagram) and Figure 2 (Pinout Location) in DS00005279A.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast diode phase-leg module applications.

Compared with IXDN450A120D16AG, APTDX450A120D16AG offers superior thermal performance via AlN; versus FF450R12ME4_B11, it provides dedicated rectification with isolation and simpler thermal management - making it optimal for high-efficiency, high-reliability AC/DC conversion stages.

Availability

APTDX450A120D16AG is available at Aetrix Electronics and suitable for uninterruptible power supply (UPS), induction heating, and welding equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant high-voltage power modules.

Supply support for APTDX450A120D16AG 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 Inc. is a global provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, communications, and computing markets with vertically integrated silicon and software offerings.

APTDX450A120D16AG belongs to Microchip's high-power discrete module portfolio, engineered specifically for ruggedized, high-efficiency AC/DC and DC/AC conversion in mission-critical industrial power systems.

FAQ

What is the maximum continuous forward current rating for APTDX450A120D16AG at case temperature?

The APTDX450A120D16AG is rated for 450 A DC forward current at TC = 95°C, as specified in Table 1-1 of DS00005279A. This rating reflects real-world thermal limits imposed by M6 terminal current-carrying capacity and package thermal design - not just semiconductor capability. At TC = 25°C, the rating rises to 700 A, but practical system design must respect the 95°C derated value.

Does APTDX450A120D16AG require external insulation when mounted to a heatsink?

No - APTDX450A120D16AG features an electrically isolated baseplate with 4000 V RMS isolation rating (VISOL), enabling direct mounting to grounded heatsinks without insulating pads or sleeves. This eliminates thermal interface resistance from isolators and simplifies mechanical assembly while maintaining safety compliance.

What is the reverse recovery charge (Qrr) of APTDX450A120D16AG at elevated temperature?

The APTDX450A120D16AG exhibits Qrr = 85.8 µC at TJ = 175°C (Table 1-3), which directly impacts switching loss and snubber sizing in high-frequency rectifier applications. This value increases significantly from 30.9 µC at TJ = 25°C, confirming strong temperature dependence - a critical factor for thermal-aware circuit design.

Can APTDX450A120D16AG be used in parallel configurations?

Yes - APTDX450A120D16AG supports paralleling due to its positive temperature coefficient of forward voltage (VF decreases with rising TJ, as shown in Figure 3-2), promoting current sharing. However, matched layout symmetry, equal busbar inductance, and individual gate/base drive (if used with companion switches) are essential to ensure balanced dynamic loading.

What mounting torque is specified for the M6 terminals of APTDX450A120D16AG?

The APTDX450A120D16AG specifies a mounting torque of 3–5 N·m for M6 terminals (Table 1-4), ensuring reliable mechanical contact and current-carrying integrity without damaging threads or deforming terminal plating. Torque outside this range risks connection failure or accelerated wear under thermal cycling.