Technical Parameters Basic Information Brand: ALSTOM / Converteam Part Number: MVAJ051JA1000A Form Factor: Standard 3U slide-in rack pluggable power module Matching peripheral boards: MVTU/MVTT traction master control CPU, KCEG/KVFG IGBT gate drive PCBs, MCGV/MCGG analog sampling & safety interlock boards, MCAA/TRVC/P127 TCMS communication boards, MMLB01/MMLG01 digital I/O expansion boards Application: European metro & light rail medium-large capacity traction converter, centralized isolated auxiliary power supply for all rack low-voltage control electronics High-Voltage Input Specifications Input source: Vehicle traction main DC link Input voltage range: 400 VDC ~ 900 VDC wide fluctuation range Max rated input power: 360 W Input protection functions: Overvoltage lockout, undervoltage automatic shutdown, reverse polarity blocking diode, multi-stage high-voltage surge absorption circuit, built-in input overcurrent fuse Galvanically Isolated Multi-Channel Outputs DC24V / 6.2A Power supply for MMLB/MMLG digital I/O modules, control relays, temperature & current analog sensors, cabinet anti-condensation heater ±15V / 3.0A Dedicated power for all analog signal conditioning and high-precision sampling circuit boards ±5V / 4.0A Power for DSP traction master CPU, rack backplane communication logic and fault non-volatile memory Dual isolated ±18V Independent isolated power rail specially for all IGBT gate drive monitoring PCBs All secondary outputs achieve complete galvanic isolation from high-voltage primary DC side Independent hardware protection for each output channel: short-circuit hardware latch-off, overcurrent limiting, overtemperature auto shutdown, automatic self-recovery after fault elimination Mechanical Specifications Overall dimension: H130 mm × W98 mm × D220 mm PCB protection: Full acrylic conformal coating, anti-moisture, anti-corrosion, anti-dust, anti-mold Front panel LED status indicators: HV Input Ready, 24V Aux Output Normal, Gate Drive Power Fault, Overheat Alarm Fastening structure: Anti-looseness lock buckle, stable electrical contact under long-term vehicle running vibration and shock Optimization feature: Enhanced heat sink layout, improved air convection for narrow traction cabinet installation Railway Environmental & EU EN Compliance Operating ambient temperature: -25 ℃ ~ +70 ℃ Storage & transport temperature: -40 ℃ ~ +85 ℃ Relative humidity: 5% ~ 95% non-condensing Vibration test standard: IEC 61373 railway rolling stock Shock resistance: 12g half-sine wave impact test EMC standard: EN 50121-3-2 railway vehicle electromagnetic compatibility Fire safety grade: EN 45545-2 HL2 low smoke, low toxicity flame retardant material