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Switching Power Supply 25 W 12 V DC – MEAN WELL S-25-12
The S-25-12 is a single output switching power supply 25 W / 12 V DC (“Single Output Switching Power Supply”) manufactured by MEAN WELL. It belongs to the S-25 series, featuring a universal AC input of 85–264 V AC (or 120–370 V DC) and a regulated output of 12 V DC / 2.1 A. It is documented as a component in CNC control cabinets, industrial automation systems, and electronic equipment in general. The unit is fanless (natural convection cooling) and compliant with CE/UL standards. The output voltage is adjustable via an onboard trimmer in the 10–13 V range; no significant revision variants exist in the standard version.
The S-25-12 provides the regulated 12 V DC auxiliary supply required to power logic boards, relays, transducers, displays, and other subsystems inside the CNC control cabinet. A failure results in loss of voltage across all 12 V circuits: the machine stops, drives lose their auxiliary supply, and the CNC cannot complete the enable sequence. In many control cabinets it is a critical, non-redundant component.
MEAN WELL is a Taiwanese switching power supply manufacturer founded in 1982, now one of the world’s leading suppliers with over 10,000 catalog models and worldwide distribution. The S-25 series is actively produced and widely available from major global electronics distributors.
Main Technical Specifications
| Type | Single output switching power supply (Single Output SMPS) |
| Part number | S-25-12 (S2512) |
| Brand | MEAN WELL |
| Known application | CNC control cabinets, industrial automation, electronic equipment |
| Function | Regulated 12 V DC auxiliary supply for logic and control circuits |
| Input voltage | 85–264 V AC / 120–370 V DC (universal) |
| Output voltage | 12 V DC (adjustable 10–13 V via trimmer) |
| Output current | 2.1 A nominal |
| Output power | 25.2 W |
| Efficiency | ~78% (typical at full load) |
| Protections | Over-current, over-voltage, short-circuit |
| Cooling | Natural convection (fanless) |
| Interfaces / connectors | Screw terminal blocks on AC input and DC output side |
| Weight | ~0.2 kg |
| Dimensions | 99 × 82 × 30 mm |
| Production status | Active production — available from stock |
Switching Power Supply 25 W / 12 V DC – MEAN WELL PS-25-12
The PS-25-12 is a single-output enclosed switching power supply (“Single Output Switching Power Supply”) rated at 25 W, manufactured by MEAN WELL, with a regulated output of 12 V DC / 2.1 A and universal input 85–264 V AC. It belongs to MEAN WELL’s PS series, designed for industrial applications, CNC control panels, machine tools and automation systems. The internal part number is PS2512. There are no output-voltage variants under this part number: the trailing “12” uniquely identifies the 12 V output version.
The power supply delivers the regulated 12 V DC voltage to logic circuits, relays, sensors and control boards inside the CNC machine’s electrical cabinet. A power supply failure immediately disables all 12 V-powered subsystems: the machine loses control over I/O, safety interlocks and internal communications, making any machining operation impossible until the unit is replaced.
MEAN WELL is a Taiwanese manufacturer founded in 1982 and a world leader in standard switching power supplies. With over 10,000 models in its catalogue, its products are used in industrial automation, machine tools, LED lighting and distributed control systems. The PS series is legacy / discontinued: it has been superseded by newer series (RS, MDR, HDR), but remains widely available as used or surplus stock.
Main Technical Specifications
| Type | Single-output enclosed switching power supply |
| Part number | PS-25-12 (PS2512) |
| Brand | MEAN WELL |
| Known application | CNC panels, machine tools, industrial automation, electrical control cabinets |
| Function | Regulated 12 V DC supply for logic circuits, relays, sensors and control boards |
| Input voltage | 85–264 V AC / 120–373 V DC (universal input) |
| Output voltage | 12 V DC (±2%) |
| Output current | 2.1 A max |
| Output power | 25 W |
| Efficiency | ~77% |
| Protections | Short circuit, overload, overvoltage |
| Interfaces / connectors | Screw terminals (AC input, DC output); free-standing or panel mount |
| Weight | ~0.27 kg |
| Dimensions | 99 × 82 × 36 mm (L × W × H) |
| Production status | Legacy / discontinued — available as used, surplus or replacement with RS / MDR / HDR series |
DIN Rail Switching Power Supply – MEAN WELL SDR-480-24
The SDR-480-24 is a single-output DIN rail switching power supply (“Single Output DIN Rail Switching Power Supply”) manufactured by MEAN WELL, part of the SDR series. It delivers 480 W nominal output power at 24 V DC with a maximum current of 20 A. The input is universal (90–264 V AC, 47–63 Hz), featuring active power factor correction (active PFC) and an integrated fan for forced-air cooling. Output voltage is adjustable in the range 22–27 V DC via trimmer. Widely used as the primary power supply in CNC control cabinets, machine tools, industrial automation systems, and 24 V DC distribution applications.
The power supply is the component that converts AC mains voltage into stable DC voltage to power the CNC control logic, I/O modules, operator panels, and auxiliary components in the electrical cabinet. A power supply failure instantly halts the entire machine control chain: the CNC loses its reference, axes stop safely, and the machine cannot resume its cycle until the component is replaced or repaired. The stability of the DC supply voltage directly affects the reliability of inter-module communication and axis positioning accuracy.
MEAN WELL is a Taiwanese switching power supply manufacturer founded in 1982, one of the largest and most widely used producers of standard power supplies in industrial and automation applications worldwide. Its products carry UL, CE, and TÜV certifications and are extensively used in electrical cabinets, CNC machines, and embedded systems. The SDR series is currently in active production.
Main Technical Specifications
| Type | Single-output DIN rail switching power supply |
| Part number | SDR-480-24 (SDR48024) |
| Brand | MEAN WELL |
| Known application | CNC control cabinets, machine tools, industrial automation, 24 V DC distribution |
| Function | AC/DC conversion: power supply for CNC control logic and cabinet auxiliary components |
| Input voltage | 90–264 V AC, 47–63 Hz (universal input) |
| Output voltage | 24 V DC (adjustable 22–27 V via trimmer) |
| Output current | 20 A |
| Rated power | 480 W |
| PFC | Active (>0.95 at full load) |
| Typical efficiency | ~91 % |
| Cooling | Integrated fan, forced-air flow |
| Protections | OVP (over-voltage), OCP (over-current), SCP (short circuit), OTP (over-temperature) |
| Mounting | DIN rail TS-35 |
| Operating temperature | –20 °C to +70 °C |
| Certifications | UL, CE, TÜV |
| Weight | ~1.2–1.8 kg |
| Dimensions | ~85 × 125 × 130 mm W × H × D |
| Production status | Currently in active production |