Technical Parameters Basic Information Brand: ALSTOM / Converteam Part Number: MVAX31S1DD5754A Form Factor: Standard 3U slide-in rack pluggable power module Matching System: MVTP series master traction CPU, KCEG/KVFG gate drive PCBs, M5A/M57 analog sampling boards, MCAA/MCTI/TM7105 TCMS communication boards, MMLB01 digital I/O expansion board Application: European urban metro & light rail traction converter, centralized isolated auxiliary power supply for full rack control electronics High Voltage Input Specifications Input source: Vehicle main traction DC link Input voltage range: 400 VDC ~ 900 VDC wide fluctuation range Max rated input power: 325 W Input protection: Overvoltage lockout, undervoltage shutdown, reverse polarity blocking diode, HV surge absorption circuit, built-in input overcurrent fuse Galvanically Isolated Multi Output Channels DC24V / 5.9A: Power for MMLB digital I/O modules, control relays, temperature/current signal sensors ±15V / 2.8A: Analog signal conditioning circuits for all sampling boards ±5V / 3.8A: DSP traction master CPU, internal rack backplane communication logic circuits Dual isolated ±18V: Dedicated isolated power rail for all IGBT gate drive monitoring PCBs All secondary outputs complete galvanic isolation from high-voltage primary DC-link side Per-channel independent hardware protection: Short-circuit hardware lockout, overcurrent limiting, overtemperature auto shutdown & automatic self-recovery after fault clearance 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 indicators: HV Input Ready, 24V Aux Output Normal, Gate Drive Power Fault, Overheat Alarm Fastening structure: Anti-looseness lock buckle, guarantees stable electrical contact under long-term vehicle running vibration and shock 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