Content last revised on February 5, 2026
Product Description: Mitsubishi J2-Q02A-F Power Hybrid IC
Product Overview
The Mitsubishi J2-Q02A-F (also identified as J2-Q02A) is an Intelligent Power Module (IPM) engineered specifically for the Mitsubishi Electric MELSERVO-J2 and J2S series servo amplifiers. As a hybrid integrated circuit, this component functions as the main power switching stage, utilizing IGBT technology to drive servo motors with precision. It is the critical repair component for 400W class servo drives operating on 200V AC systems.
Technical Parameters & Specifications
| Category | Specification |
| Part Number | J2-Q02A-F |
| Manufacturer | Mitsubishi Electric |
| Component Type | Power Hybrid IC / IGBT Module |
| Application Class | 400W Servo Amplifiers (0.4kW) |
| Rated Voltage Class | 200V - 230V AC |
| Module Technology | Insulated Gate Bipolar Transistor (IGBT) |
| Package Type | SIP (Single Inline Package) with metal backplate |
| Mounting Style | Through-Hole (Solder) / Screw mount to heatsink |
| Pin Configuration | Multi-pin proprietary interface |
| Operating Temperature | -20°C to +85°C (Case Temperature) |
| Country of Origin | Japan |
Compatibility List
This module is the OEM internal power stage for the following Mitsubishi Servo Amplifiers:
-
MR-J2 Series: MR-J2-40A, MR-J2-40B, MR-J2-40C, MR-J2-40D
-
MR-J2S Series: MR-J2S-40A, MR-J2S-40B, MR-J2S-40CP
(Note: Please verify the specific markings on your original board, as higher wattage drives use different modules like J2-Q04A-B or J2-Q06B).
Frequently Asked Questions (FAQ)
Q1: What are the common signs that this module has failed?
A: Common symptoms of a failed J2-Q02A-F include the servo drive displaying alarm codes AL.32 (Overcurrent) or AL.30 (Regenerative Error) immediately upon power-up or motor enablement. In severe cases, there may be visible burn marks or cracks on the module's casing.
Q2: Is the J2-Q02A-F plug-and-play?
A: No. This is a board-level component. Replacing it requires disassembling the servo drive, desoldering the old module from the printed circuit board (PCB), and soldering the new unit in place.
Q3: Do I need to apply thermal paste during installation?
A: Yes, absolutely. The metal backplate of the module acts as a thermal interface. You must apply a thin, even layer of high-quality thermal compound (heatsink paste) between the module and the drive's aluminum chassis to ensure proper heat dissipation. Failure to do so will result in immediate overheating.
Q4: Can I use this module to replace a J2-Q04A-B?
A: No. The J2-Q04A is designed for 600W/750W drives and handles higher currents. The J2-Q02A-F is strictly for the 400W class drives. They are not interchangeable.
Q5: Is this a new component?
A: The MR-J2 series was discontinued by Mitsubishi Electric several years ago. While New Old Stock (NOS) is occasionally available, many units on the market are pulled from surplus equipment or are high-quality refurbished components. Please check the specific condition listing with the vendor.
Q6: Should I replace other components along with this module?
A: It is highly recommended to inspect the optocouplers and gate resistors on the drive board near the module. When an IGBT fails, high voltage often feeds back into the control circuit, damaging these driving components. Installing a new module without fixing the drive circuit may cause the new module to fail instantly.
