Your control panel needs 120W on a DIN rail, but the two single-output units you're choosing between speak different voltages. One is a 24-volt supply with a MEAN WELL name; the other is a 12-volt unit with a lower listed price. The decision is not just about wattage: pick the wrong voltage and the supply will not power anything in your panel.
Quick verdict
For a 24 VDC control bus, the MEAN WELL NDR-120-24 is the direct fit. For a 12 VDC bus, the 120W 12VDC 10A DIN supply is the lower-priced option. Match the voltage to the output and the choice follows.
At a glance
| Product | Listed price | Output | Price bar |
|---|---|---|---|
| MEAN WELL NDR-120-24 | $31.64 | 24 VDC, 5 A, 120 W | |
| 120W 12VDC 10A DIN supply | $19.99 | 12 VDC, 10 A, 120 W |
Where each wins
The MEAN WELL NDR-120-24 wins for 24-volt loads. Its listed specs include a 24 VDC output at 5 A, a 90-264 VAC input range, 88% efficiency, and a set of listed protections for short circuit, overvoltage, overload, and overtemperature. It also lists UL, CUL, TUV, CB, CE, EN, and EAC approvals, and the screw-terminal connector is a standard way to land DIN rail wiring.
The 120W 12VDC 10A supply wins for 12-volt loads and for anyone who wants the lower listed price. It lists a 100-240 VAC input range, efficiency of at least 85%, and a 10 A output at 12 VDC. The title provides panel planners with a physical size: 1.7 x 4.8 x 5.1 inches.
Product notes
MEAN WELL NDR-120-24
At $31.64, this is the higher-priced unit, but it is the only one built for a 24-volt bus. The description lists 24 VDC at 5 A, 120W, a universal 90-264 VAC input, and protections for short circuit, overvoltage, overload, and overtemperature. Its 88% efficiency and screw-terminal output connector are also listed, and the connector style is a straightforward match for DIN rail wiring. Choose it when your panel expects 24 VDC and you want the listed protection suite. The limitation is the output voltage: this supply cannot deliver the 12 VDC that a 12-volt rail needs, so the decision should start with your bus voltage.
120W 12VDC 10Amp DIN Rail Power Supply
At $19.99, this unit is the lower-priced one. It outputs 12 VDC at 10 A for 120W, with an input range of 100-240 VAC at 50/60 Hz and efficiency rated at least 85%. The title includes dimensions of 1.7 x 4.8 x 5.1 inches, which gives panel planners a concrete size to work with. If your bus runs at 12 VDC, the 10A output covers 120W without needing a second supply. The limitation is that it is a 12-volt-only supply; if you need 24 VDC, this unit will not work.
Final call by use case
The final call is a bus-voltage decision. If your panel runs at 24 VDC, choose the MEAN WELL NDR-120-24 and use the 120W output with the listed protection suite. If your panel runs at 12 VDC, the 120W 12VDC 10A DIN supply carries a listed price $11.65 lower while still providing the full 120W.
