Class, series, and where it sits in the cabinet
The MR-J4-100A is a MELSERVO-J4 series servo amplifier from Mitsubishi Electric, sized for a 200V class three-phase input at three-phase AC170 V and a motor rated output of 1 kW, which is the headline figure that sets the cabinet slot it occupies — the matching HG-series or JN-series motor must be sized at or below that 1 kW rating for the amplifier to deliver nameplate torque without tripping on overload.
What the input rating drives in practice
Three-phase AC170 V on a 200V class amplifier is the nominal three-phase 200 V supply at the rectifier input; allowable frequency fluctuation is held within ±5 %, so upstream conditioning is required only when the panel is fed from a generator or a long feeder with measurable drift — a normal transformer-fed three-phase 200 V utility feed sits well inside that window.
Production status and supply posture
Quoted against an RFQ with lead time confirmed at quote time, sized for the panel-builder's BOM quantity rather than a single spare — independent distribution holds independent-channel reach for units that fall outside the standard authorised stocking window, with availability and current pricing confirmed per RFQ.