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MITSUBISHI Power Supply
Brand: MITSUBISHI -
Cat: Power Supply
Code:SF-PWH
| Combination name | Availability | Price |
|---|---|---|
CNC Power Supply Unit – MITSUBISHI SF-PWH
The SF-PWH (internal part number SFPWH) is a switching power supply module for CNC control systems (“CNC Power Supply Unit”) manufactured by Mitsubishi Electric. The unit belongs to the family of power supply modules designed for the control boards of MELDAS-series and related Mitsubishi numerical control systems. It delivers the regulated DC voltages required by the control logic, axis modules, and operator panel interfaces; the PWH suffix identifies the specific power rating and mechanical form factor variant. Verify the installed hardware revision before replacement, as connector configurations may differ between variants.
The power supply unit is the energy core of the CNC rack: it converts mains voltage (or DC bus) into multiple stabilised outputs that are essential for the operation of the CPU, I/O boards, axis drives, and display. Even a partial failure on a single output rail can trigger unpredictable system faults, undiagnosable errors, or secondary damage to downstream boards; its condition directly determines the overall availability of the machine tool.
Mitsubishi Electric is one of the world’s leading manufacturers of industrial automation systems, motion control, and numerical controllers. The FA (Factory Automation) division has produced the MELDAS, MELDASMAGIC, and more recent M70/M80 CNC series for decades. Components in the SF-PWH series belong to earlier generations of CNC controls and are to be considered legacy / discontinued: availability is limited to the used, surplus, and specialist repair channels.
Main Technical Specifications
| Type | Switching power supply module for CNC control (CNC Power Supply Unit) |
| Part number | SF-PWH (SFPWH) |
| Brand | Mitsubishi Electric |
| Known application | Mitsubishi CNC MELDAS series and related numerical control systems |
| Function | Regulated DC voltage supply for CPU, I/O boards, axis drives and operator panel |
| Input voltage | ~100–240 V AC 50/60 Hz or internal DC bus |
| Main outputs | +5 V, ±15 V, +24 V DC (typical for MELDAS PSU family; verify in manual) |
| Technology | Switch-mode (SMPS) with linear post-regulation on logic outputs |
| Interfaces / connectors | Edge / comb connectors on Mitsubishi CNC rack backplane |
| Protections | Overvoltage, overcurrent, short-circuit (typical for the family) |
| Weight | ~0.8–2.0 kg |
| Dimensions | ~150–300 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
