Vicor VI-MA3-03

The Vicor VI-MA3-03 is an AC-DC front-end converter module engineered for high-efficiency power conversion in modular power systems. Built on the FlatPAC form factor, it accepts single-phase AC input and delivers isolated DC output suitable for integration with Vicor DC-DC converter modules and MegaMods. The unit provides galvanic isolation, AC fail warning capability, and dual status signals for system monitoring.

– Technical Specifications

Input: 100-120/200-240 VAC, 2.4/1.2 A, 47-63 Hz

Output: 3 A nominal rating; voltage varies by sub-model configuration

Power Rating: Configuration-dependent; related VI-MA3 series modules span 100 W to 400 W

Isolation: Galvanic isolation between input and output

Efficiency: Vicor off-line front-ends typically achieve 96-98% efficiency

Holdup Time: 4 ms at low line (60 Hz) and 27 ms at nominal line (60 Hz) for 250 W units; 7 ms at low line and 29 ms at nominal line for 500-750 W units

AC Fail Warning Time: 5 ms min for 250 W units; 6 ms min for 500-750 W units

Output Regulation: ±0.5% typical no-load to full-load

Dielectric Withstand: 1.5 kVAC; 2121 Vdc (line to ground or case)

Transient Surge Immunity: IEC 61000-4-5 Level 3

Conducted EMI: VDE 0871/FCC Part 15, Class B (single-phase), Class A (three-phase)

– Key Features

• Compact FlatPAC package enables high power density integration
• AC OK and BUS OK status signals for system-level monitoring and control
• Multiple input voltage configurations support global mains standards
• Galvanic isolation protects downstream DC-DC converter stages
• Industrial EMI compliance across single and three-phase applications

– Compatibility & Integration

The VI-MA3-03 pairs directly with Vicor VI-260 and VI-J60 series DC-DC converters, as well as MegaMods. Supports both chassis-mount and PC-mount installation. Additional VI-MA3 series modules enable system scalability across power and voltage requirements.