Microchip Technology APT2X61DQ120J

Overview

APT2X61DQ120J from Microsemi is an ultrafast soft recovery rectifier diode in SOT-227 (ISOTOP®) package, rated for 1200 V blocking voltage and 60 A average forward current at TC = 85°C with 0.5 duty cycle. It delivers low forward voltage (VF = 3.07 V typ. at IF = 60 A), soft reverse recovery (trr = 60 ns typ. at IF = 60 A, diF/dt = −200 A/µs, VR = 800 V, TC = 25°C), and avalanche energy rating (EAVL = 20 mJ), enabling use in high-efficiency motor controllers and UPS systems.

For engineers reviewing the APT2X61DQ120J datasheet, APT2X61DQ120J pinout, APT2X61DQ120J application, or APT2X61DQ120J equivalent, key selection criteria include reverse recovery time, softness factor, thermal resistance (RθJC = 0.56 °C/W), junction capacitance (CT = 70 pF at VR = 200 V), and avalanche ruggedness - all critical for snubberless IGBT anti-parallel operation and high-frequency rectification.

Technical Context

The APT2X61DQ120J employs dual-die construction in a single ISOTOP® package, supporting both anti-parallel and parallel configurations for IGBT modules. Its soft recovery behavior minimizes voltage overshoot and EMI during commutation, with trr < 60 ns and Qrr = 265 nC (typ.) under standard test conditions.

Thermally, it features low junction-to-case resistance (0.56 °C/W) and operates across −55°C to +175°C, enabling high-power density designs in industrial inverters. The device is avalanche-rated (20 mJ at 1 A, 40 mH), confirming ruggedness against transient overvoltage events without external clamping.

Key Specifications

Pinout & Package

SOT-227 (ISOTOP®) package: 4-terminal, isolated copper base, dual-anode/dual-cathode configuration. Terminals are electrically isolated from mounting base; anode 1 and cathode 1 form one die, anode 2 and cathode 2 form second die. Mounting torque: 29.2 lb·in (4 N·m).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast soft recovery diode applications.

Compared with APT2X60DQ120J, the APT2X61DQ120J offers identical performance but with documented dual-die isolation for enhanced reliability in redundant topologies; versus STTH120R06DJF, it provides 2× voltage margin and integrated avalanche protection at the cost of higher VF and larger footprint.

Availability

APT2X61DQ120J is available at Aetrix Electronics and suitable for motor drive inverters, uninterruptible power supplies (UPS), induction heating systems, and industrial DC converters requiring stable component supply and long-term lifecycle assurance.

Supply support for APT2X61DQ120J 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability, high-voltage, and radiation-hardened components for aerospace, defense, and industrial power systems.

The APT2X61DQ120J belongs to Microsemi's Ultrafast Soft Recovery Diode product line, engineered specifically for high-efficiency, high-power-density IGBT-based inverters and converters operating above 10 kHz.

FAQ

What is the maximum junction temperature rating for the APT2X61DQ120J?

The APT2X61DQ120J has a maximum junction temperature (TJ) rating of +175°C and minimum storage temperature of −55°C. This wide range supports operation in harsh environments such as industrial motor drives and outdoor UPS enclosures. Thermal design must maintain TJ ≤ 175°C under worst-case conduction and switching loss conditions, using the specified RθJC = 0.56 °C/W and verified case temperature measurements. The APT2X61DQ120J datasheet confirms this rating applies across all operating modes including avalanche stress.

Does the APT2X61DQ120J support anti-parallel configuration with IGBTs?

Yes, the APT2X61DQ120J is explicitly designed for anti-parallel use with 1200 V IGBTs in inverter half-bridges. Its soft recovery (trr = 60 ns typ., Qrr = 265 nC) and low di/dt-induced overshoot minimize voltage stress on the paired IGBT. The dual-die SOT-227 package allows independent terminal routing for optimal layout symmetry. The APT2X61DQ120J datasheet Figure 9 and application notes confirm validated anti-parallel waveforms under 200 A/µs diF/dt conditions.

What is the reverse recovery charge (Qrr) of the APT2X61DQ120J at 125°C junction temperature?

The APT2X61DQ120J exhibits Qrr = 560 nC (max) at TJ = 125°C, IF = 60 A, diF/dt = −200 A/µs, and VR = 800 V - a 112% increase over its 25°C value of 265 nC. This temperature-dependent rise is documented in the "Dynamic Characteristics" table of the APT2X61DQ120J datasheet (Rev D). Designers must account for this degradation when sizing snubbers or verifying IGBT safe operating area at elevated temperatures.

Is the APT2X61DQ120J UL Recognized?

Yes, the APT2X61DQ120J is UL Recognized under file #E145592, with isolation voltage rating of 2500 V RMS (50–60 Hz sinusoidal waveform, 1 minute, terminals to mounting base). This certification validates its suitability for safety-critical AC/DC and DC/AC power conversion equipment requiring regulatory compliance. The UL mark appears on the APT2X61DQ120J package outline drawing and is referenced in the "Thermal and Mechanical Characteristics" section of the datasheet.

What is the mounting torque specification for the APT2X61DQ120J package?

The APT2X61DQ120J SOT-227 (ISOTOP®) package specifies a maximum mounting torque of 29.2 lb·in (4 N·m) for the four M4 hex nuts. Exceeding this torque risks deforming the copper base or compromising thermal interface integrity. The APT2X61DQ120J mechanical drawing (Rev D) defines torque tolerance as ±10%, and recommends using a calibrated torque wrench with lubricated threads to achieve uniform clamping force across all four points.