NEC IGBT PDMB200B17 or PDMB2OOB17

PDMB200B17 | NEC IGBT Module — 200A / 1700V / Discrete Semiconductor / Industrial Power Conversion

NEC IGBT Modules — Established Industrial Power Semiconductor

NEC Electronics (now part of Renesas Electronics following the 2010 merger of NEC Electronics and Renesas Technology) was a major manufacturer of power semiconductor modules, including IGBTs, thyristor modules, and intelligent power modules for industrial applications. The PDMB series represents NEC's dual IGBT module format designed for industrial drive and inverter applications.

The PDMB200B17 at 200A and 1700V occupies the mid-to-high power class for industrial drive IGBTs — capable of switching sufficient current for motor drives in the 55–90kW range at standard industrial supply voltages.

Key Specifications

IGBT Technology — Why IGBTs for Industrial Drives

The IGBT (Insulated Gate Bipolar Transistor) combines:

High input impedance (MOSFET gate): The gate requires virtually no drive current to switch — the gate drive circuit only charges and discharges the gate capacitance, dramatically simplifying gate drive electronics compared to bipolar transistors.

Low conduction loss (bipolar output): The bipolar output stage conducts with low saturation voltage (VCE(sat)) even at high currents — reducing conduction power loss compared to MOSFETs at the same current level.

Fast switching: IGBT turn-on and turn-off times in the microsecond range enable PWM frequencies of 2–20kHz — allowing smooth motor speed control without the acoustic noise that low switching frequencies produce in motor windings.

At 200A and 1700V, the PDMB200B17 delivers these IGBT advantages at the power levels required for industrial motor drives, UPS systems, and power conversion equipment in the mid-to-large industrial power class.

Application Scenarios

Industrial VFD repair: A variable frequency drive for an industrial fan or pump application requires an IGBT module replacement. The PDMB200B17 is identified from the drive's bill of materials as the appropriate NEC IGBT module for this drive's power stage.

Planned maintenance spare: A facility maintaining NEC-equipped industrial drives holds PDMB200B17 as a critical spare component — ensuring rapid restoration of a motor drive without extended downtime awaiting parts delivery.

FAQ

Q1: What industrial applications use PDMB200B17 class IGBT modules?

200A / 1700V IGBT modules serve: variable frequency drives for industrial motors in the 55–90kW range, UPS systems for data centres and industrial loads, traction inverters for rail vehicles and heavy industrial vehicles, medium-power welding systems, and induction heating converters. The specific application depends on the equipment in which PDMB200B17 is installed.

Q2: What thermal management is required for PDMB200B17 in service?

The module must be mounted on a heat sink or cold plate with adequate thermal resistance to keep junction temperature within rated limits under the application's duty cycle. Apply thermal interface compound uniformly to the module base plate before mounting. Follow NEC's specified mounting torque to maintain adequate contact pressure without mechanical over-stress. Inadequate cooling is the leading cause of IGBT module failure in service.

Q3: What precautions apply when handling PDMB200B17 for replacement?

Discharge the circuit's DC bus completely before handling the IGBT module — confirm bus voltage below 50V with a calibrated meter. Handle with anti-static precautions; the gate oxide of the IGBT transistors is sensitive to electrostatic discharge. Inspect the module's base plate and mounting surface for contamination or damage before fitting thermal compound and remounting.

Q4: What failure symptoms indicate a faulty PDMB200B17 in a drive system?

IGBT failure modes include: short circuit between collector and emitter (drive trips on overcurrent immediately at enable), open circuit failure (drive shows output current asymmetry — one phase missing), or degraded switching (increased thermal dissipation without obvious alarm, manifesting as premature overtemperature). Diagnose with DC bus discharged by measuring resistance between collector, emitter, and gate terminals — a shorted collector-emitter junction (near zero ohms) confirms hard failure.