Description
The 2MBI600VX-120-50 is a 1200 V, 600 A dual (2-pack) IGBT module with anti-parallel free-wheeling diodes, manufactured by Fuji Electric and widely used as the primary power semiconductor in ABB ACS600 / ACS800 / ACS850 drives and PSTB Series soft starters. Housed in a rugged isolated-baseplate package with screw power terminals and press-fit signal pins, it forms the inverter leg of medium-to-high power drive power stacks, converting DC bus voltage into variable-frequency AC for motor control.
Application Scenarios
Consider a cement plant where a 1.2 MW ID fan is driven by an ABB ACS800-104 inverter. After 16 years of continuous duty, one phase of the inverter begins showing unbalanced DC bus ripple and occasional “Overcurrent Phase” trips—classic symptoms of a degrading IGBT in the u-phase leg. Removing the entire drive would require a multi-day shutdown. Instead, during a planned kiln cool-down, the drive technician isolates power, discharges the DC link, removes the clamps / pressure plate, extracts the suspect 2MBI600VX-120-50, and installs a verified replacement (matched VCE(sat)characteristic to remaining legs). After re-torquing the new module’s terminals and reinstalling the clamping plate to spec, the drive powers up, passes the built-in IGBT test, and the fan returns to service—total intervention under 90 minutes. The 2MBI600VX-120-50 directly solves the legacy-drive spares gap for plants extending the life of proven ABB drive assets, turning a potential drive-change project into a board/switch-level repair.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | 2MBI600VX-120-50 (Alt. Ref: 2MBI600VX120-50, 2MBI600VX-120-50) |
| Manufacturer | Fuji Electric (approved / cross-listed for ABB drive power sections) |
| Product Category | Dual (2-Pack) IGBT Module + Anti-Parallel FWD (Free-Wheeling Diode) |
| Collector-Emitter Voltage VCES | 1200 V |
| Collector Current IC(Tc=100°C) | 600 A |
| ICPulse (1 ms, Tc=100°C) | 1200 A |
| VCE(sat)typ. @ IC=600A | ≈ 2.1–2.4 V (VX series low saturation — verify datasheet rev.) |
| Gate-Emitter Voltage VGES | ±20 V |
| Isolation Voltage VISO(AC 1 min) | 4000 V AC (Baseplate ↔ Terminals) |
| Switching Frequency (Recommended) | ≤ 3 kHz typical for inverter apps; up to 20 kHz possible with derating |
| Package / Baseplate | Standard Fuji 2MBI footprint; AlSiC or Cu-base isolated baseplate (NTC not included on this variant) |
| Mounting / Connections | M8 power screw terminals; press-fit / solder signal pins; clamped via pressure plate to heat sink |
| Operating Junction Temp. Tj | -40 °C to +150 °C (Tj(max)= 150 °C) |
| Weight (Approx.) | 1.6–2.0 kg |
| Typical ABB Drive Fitment | ACS800-04/-07/-104 (frame sizes R8–R11 depending on power), PSTB soft starter thyristor/IGBT stages (selected ratings) |
Technical Principles and Innovative Values
- Innovation Point 1 — V-Series Low-VCE(sat)Chip Technology: The 2MBI600VX-120-50 uses Fuji’s 6th/7th-gen V-Series IGBT chips with optimized carrier lifetime, achieving typical VCE(sat)≈ 2.15 V at 600 A. This reduces conduction losses by 10–15 % vs. older U-Series equivalents, lowering heatsink delta-T and extending drive-component life in high-duty-cycle applications like fans, pumps, and conveyors.
- Innovation Point 2 — Isolated Baseplate with Low Thermal Resistance: The direct-bonded copper (DBC) substrate on an AlSiC/Cu baseplate provides Rth(j-c)≈ 0.065 K/W (typical for IGBT portion), ensuring efficient heat transfer into the drive’s liquid- or forced-air-cooled heatsink. The isolated baseplate (≥ 4 kV AC isolation) eliminates the need for additional insulating mica between module and grounded heatsink—simplifying installation and improving thermal contact.
- Innovation Point 3 — Drop-In Footprint for ABB Drive Power Stacks: The module follows the industry-standard 2MBI 600 A / 1200 V footprint. In ABB ACS800 power sections it drops directly onto the existing heatsink location, uses the same M8 power-terminal torque spec (typically 18–22 N·m), and seats under the original pressure-clamping arrangement—no machining, no adapter plates, no rewiring of the DC-link busbars.
Application Cases and Industry Value
A Middle Eastern petrochemical plant runs ABB ACS800-104 drives on its 50 Hz / 690 V extractor fans. One drive began logging sporadic “Phase U Overcurrent” and “DC Link Unbalanced” faults. Trend data showed gradual rise in IGBT junction-estimated temperature on one leg. The drive was taken out of service during a turnaround; the suspected u-phase 2MBI600VX-120-50 was removed and a new module static-tested (VCE(sat), gate-emitter leakage, diode VF) before installation.Post-replacement and torque verification per ABB manual, the drive passed the built-in IGBT self-test and was returned to service. The site instrumentation lead commented: “The 2MBI600VX-120-50 was a perfect form-fit. We kept the original busbars, clamps, and cooling. One module swap saved us a full drive change-out quoted at $45 K. It’s now on our critical-spares list.”The plant deferred a drive-modernization project by an estimated 6–8 years and avoided a multi-day shutdown.
