Vicor MegaPAC MP4-76579 Power Supply Modules: 47-500 HZ, PX-008-TG001/1A, TSENTIBTC-03104, PCXT/RPC+ 0040-86514 —

Technical Dossier

Product Details And Specifications

Vicor MegaPAC Series: Comprehensive Module Range and Technical Overview

The Vicor MegaPAC series represents one of the most widely deployed high-density AC-DC power conversion platforms in global heavy industry. Installed across petrochemical refineries, nuclear power generation facilities, offshore platforms, and continuous-process chemical plants, MegaPAC systems are engineered for 24/7 mission-critical operation. The modular architecture — combining front-end AC input conditioning with field-replaceable DC-DC converter bricks — allows facilities to maintain uptime without full system replacement. The MP4-76579 chassis variant, operating across the 47–500 Hz frequency range, is specifically suited for both 50 Hz and 60 Hz grid environments as well as aviation-grade 400 Hz power infrastructure.

The Evolution of MegaPAC Architecture

Vicor introduced the MegaPAC platform as a scalable successor to discrete linear power supply designs prevalent in 1980s industrial control cabinets. The first-generation MegaPAC chassis used fixed-output DC-DC bricks with limited configurability. By the mid-1990s, Vicor introduced the PCXT and RPC+ backplane communication standards, enabling supervisory control, fault reporting, and remote enable/disable functions via RS-232 and later RS-485 interfaces. The TSENTIBTC (Thermal Sensing and Intelligent Battery/Trim Control) sub-module family was introduced to address thermal derating in high-ambient environments — a critical requirement for enclosed industrial enclosures in tropical and desert climates. The PX-008-TG001/1A front-end module standardized EMI filtering and inrush current limiting for compliance with IEC 61000-3-2 harmonic standards. As of the mid-2010s, the MegaPAC line entered its mature/sustaining phase; Vicor has transitioned new designs toward the ChiP and Picor families, making long-term MegaPAC spare parts sourcing a primary concern for maintenance engineers managing legacy installations.

MegaPAC Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed components within the Vicor MegaPAC ecosystem. Each entry reflects a distinct functional role within the power system architecture:

MP4-76579: 4-slot MegaPAC chassis, 47–500 Hz wide-frequency AC input, primary platform SKU for this listing.
PX-008-TG001/1A: Front-end AC input filter and inrush control module, IEC 61000-3-2 compliant.
TSENTIBTC-03104: Thermal sensing and intelligent battery/trim control sub-module, 3.3V/5V/12V trim range.
PCXT/RPC+ 0040-86514: Backplane communication controller, RS-232/RS-485 supervisory interface module.
MP6-76579: 6-slot MegaPAC chassis variant, same 47–500 Hz input spec, extended output capacity.
MP8-76579: 8-slot MegaPAC chassis, high-density configuration for multi-rail distribution panels.
VI-J00-CX: 50W DC-DC converter brick, 48V input / 5V output, standard MegaPAC slot-compatible.
VI-J10-CX: 50W DC-DC converter brick, 48V input / 12V output, MegaPAC slot-compatible.
VI-J20-CX: 50W DC-DC converter brick, 48V input / 15V output, MegaPAC slot-compatible.
VI-J30-CX: 50W DC-DC converter brick, 48V input / 24V output, MegaPAC slot-compatible.
VI-J40-CX: 50W DC-DC converter brick, 48V input / 28V output, MegaPAC slot-compatible.
VI-J50-CX: 50W DC-DC converter brick, 48V input / 48V output, pass-through/isolation configuration.
VI-200-CX: 200W DC-DC converter brick, high-current output for motor drive auxiliary rails.
FP-1-CX: Front panel display and fault indicator module for MegaPAC chassis.
RPCM-0040: Remote power control module, enables supervisory on/off and fault latch reset.
TSENTI-01: Standalone thermal sensing module, external thermocouple input, 0–85°C range.
PX-012-TG002: Enhanced front-end module with active PFC, successor to PX-008-TG001/1A for higher harmonic compliance.
MP4-76580: Narrow-frequency (47–63 Hz) variant of the MP4-76579 chassis for standard grid-only installations.

Sourcing Hard-to-Find & Obsolete MegaPAC Parts

Quality Control for the MegaPAC Range

MegaPAC modules present specific test challenges due to their multi-slot backplane architecture and mixed analog/digital communication buses. DriveKNMS applies the following test protocol to all MegaPAC units prior to shipment: (1) AC input sweep test across 47–500 Hz at rated voltage to verify front-end filter and rectifier integrity; (2) DC-DC brick load test at 25%, 50%, 75%, and 100% rated output current with thermal imaging to detect failing capacitors or bond wire degradation; (3) PCXT/RPC+ backplane communication verification using a dedicated RS-485 loopback fixture to confirm supervisory register read/write integrity; (4) TSENTIBTC trim range verification across the full 0–85°C thermal profile using a calibrated thermal chamber; (5) Hi-pot dielectric withstand test at 1500 VAC for 60 seconds per IEC 62368-1. Each unit ships with a serialized test record.