Content last revised on October 25, 2025.
PM50CLS120 1200V / 50A Intelligent Power Module
Introduction to a Compact Power Core
The Mitsubishi PM50CLS120 is an L-Series Intelligent Power Module (IPM) designed to streamline the development of reliable and efficient three-phase inverter systems. It provides an integrated power solution rated for 1200V and 50A, featuring a low saturation voltage (VCE(sat)) of 2.2V (Typ.). This module combines six IGBTs, free-wheeling diodes, and a dedicated gate drive and protection circuit into a single compact package. Key benefits include significant reductions in conduction losses and a simplified design cycle due to its integrated protection features. It directly addresses the engineering challenge of balancing performance, reliability, and footprint in power conversion designs. For small to medium-power motor drives requiring high efficiency and built-in fault tolerance, the PM50CLS120's integrated approach offers a distinct advantage.
Key Parameter Overview
Decoding the Specs for Integrated Motor Drive Applications
The technical specifications of the PM50CLS120 are tailored for high-performance inverter applications. The parameters are functionally grouped below to highlight the module's capabilities in power switching, control, and self-protection, providing a clear basis for system design evaluation.
| Parameter | Test Conditions | Value |
|---|---|---|
| Inverter Part (Absolute Maximum Ratings, Tj=25°C unless otherwise noted) | ||
| Collector-Emitter Voltage (VCES) | VGE = 0V | 1200V |
| Collector Current (IC) | TC = 25°C | 50A |
| Collector Current (Pulsed) (ICP) | TC = 25°C | 100A |
| Collector Power Dissipation (PC) | TC = 25°C | 208W |
| Inverter Part (Electrical Characteristics, Tj=25°C unless otherwise noted) | ||
| Collector-Emitter Saturation Voltage (VCE(sat)) | IC = 50A, VGE = 15V | 2.2V (Typ.), 2.7V (Max.) |
| Short Circuit Withstand Time (tsc) | VCC=800V, IC=50A, Tj=125°C | >10µs |
| Control Part (at VCC=15V, VCIN=15V) | ||
| Control Supply Voltage (VD) | Applied between VUP1-VUPC, VVP1-VVPC, VWP1-VWPC, VN1-VNC | 15V (13.5V - 16.5V) |
| Control Supply Current (ID) | Per circuit | 20mA (Max.) |
| SC Protection Trip Level (IC(sc)) | - | 90A (Typ.) |
| Isolation Voltage (Viso) | AC, 1 minute | 2500 Vrms |
Application Scenarios & Value
Achieving System-Level Benefits in Variable Speed Drives
The PM50CLS120 is engineered for applications where efficiency and reliability are paramount. Its primary value is demonstrated in systems like small-to-mid-power Variable Frequency Drives (VFDs), servo drives, and general-purpose inverters. Consider the challenge of designing a compact servo drive for a robotic arm, where excess heat can degrade performance and component life. The PM50CLS120's low VCE(sat) of 2.2V directly tackles this problem. This low voltage drop during conduction is analogous to a water pipe with very little friction; it allows current to flow with minimal energy loss as heat. This reduction in thermal waste enables the use of smaller heatsinks, leading to a more compact and cost-effective overall system design. Furthermore, the integrated over-current (OC) and short-circuit (SC) protection simplifies the external monitoring circuitry, reducing the Bill of Materials (BOM) and accelerating the design-to-market timeline. For systems requiring lower current, the related 7MBR25SA120-50 offers a 25A alternative in the 1200V class, while for higher power requirements, the PM75CLS120 provides a 75A solution.
Frequently Asked Questions (FAQ)
How do the integrated undervoltage (UV) and short-circuit (SC) protections in the PM50CLS120 enhance system reliability?
The integrated UV and SC protection circuits act as a vigilant supervisor for the IGBTs. The UV protection ensures the gate drive voltage is sufficient for full saturation, preventing the IGBTs from operating in a high-dissipation linear mode which can lead to rapid failure. The SC protection detects dangerously high currents and initiates a soft shutdown, preventing catastrophic failure of the module and protecting downstream components. This built-in intelligence translates to higher operational reliability and a safer system.
What is the primary benefit of having the control terminals isolated within the PM50CLS120 module?
The isolation of control terminals from the high-voltage power stage, rated at 2500 Vrms, is a critical safety and design feature. It allows the low-voltage control logic (from a microcontroller) to interface with the high-power inverter without the need for complex and space-consuming external optocouplers or transformers for isolation. This simplifies PCB layout, reduces component count, and improves noise immunity, leading to a more robust and reliable control system.
Get Your Design Started
To evaluate the PM50CLS120 for your next power conversion project or to request more detailed information, please contact our technical sales team. We can provide further assistance to help you leverage the module's integrated features for a faster and more reliable design cycle.
