Original Alstom MITRAC DCU drive control unit DCC2382A, core traction‑brake controller for metro and rolling‑stock onboard cabinet spare part.

Product Overview

3EST125‑975 (DCC2382A) is MITRAC DCU drive control unit inherited from Bombardier, belongs to ALSTOM EST series fail‑safe onboard electronic platform. It serves as core processing board for rolling‑stock traction control system, collects motor encoder, line‑voltage and vehicle‑speed signals, executes torque closed‑loop regulation and IGBT driving pulse output, realizes train traction and braking sequence control. It communicates with other onboard devices via MVB vehicle bus, supports fault recording and status diagnosis. Designed complying with railway vehicle standards, rugged PCB assembly resists vibration, shock and electromagnetic interference. Original manufacturer discontinued production, widely used as maintenance spare part for metro, light‑rail and EMU vehicle control cabinets.

Key Features

• High‑speed embedded processor for real‑time traction torque and braking logic closed‑loop control
• Precise IGBT pulse output to drive traction power converter for vehicle propulsion control
• Supports MVB vehicle bus communication for data exchange with other onboard control equipment
• On‑board non‑volatile memory stores operating parameters and timestamped fault event logs
• Complies with EN50155, EN61373 railway standards for vibration, shock and EMC performance
• Fail‑safe hardware design, enters safe state upon internal fault to guarantee vehicle operation safety

• Eurocard plug‑in rack‑mount structure, convenient for onboard cabinet replacement

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Technical Specifications

• Brand: ALSTOM (Former Bombardier Transportation)
• Model: 3EST125‑975, DCC2382A
• Module Type: MITRAC DCU Drive Control Unit
• System Platform: MITRAC On‑board Traction Control System
• Communication: MVB vehicle bus
• Power Supply: Vehicle‑grade DC power input
• Standard: EN50155, EN61373, EN50121
• Operating Temp: ‑40℃ ~ +70℃
• Storage Temp: ‑40℃ ~ +85℃
• Humidity: 5‑95% non‑condensing

• Installation: Plug‑in inside rolling‑stock onboard control cabinet

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Compatibility

Used for Alstom MITRAC series metro and rolling‑stock traction system. Parameter configuration download, signal loop inspection and traction‑braking function simulation test required after replacement.