Quick Take
Choosing a DIN rail power supply starts with the voltage your control circuit needs and the current your load draws. These four industrial power supplies cover the common voltages found in control panels: 12 VDC, 24 VDC, and 36 VDC. They also show why listed price alone is not enough to pick one: the least expensive unit is a 12V model, while the highest-priced unit is a used 36V model. The 24V group includes two NDR-120-24 options, one from Mean Well and one from MW, so the real decision for many shoppers is whether either 24V unit fits the panel better than a 12V or 36V option.
Listed-Price Comparison
The table below lines up the four units by listed price, output, and condition.
| Product | Listed Price | Price Bar | Output | Condition |
|---|---|---|---|---|
| Mean Well NDR-120-24 | USD 31.64 | 24 VDC, 5 A | New | |
| 120W 12VDC DIN Rail PSU | USD 19.99 | 12 VDC | New | |
| MW NDR-120-24 5A Blue | USD 44.99 | 24 VDC, 5 A | New | |
| PULS QS20.361 | USD 49.00 | 36 VDC | Used |
The listed prices span USD 19.99 to USD 49.00, a USD 29.01 spread. The lowest-priced unit is also the only 12V option, while the highest-priced unit is the only used option.
Decision Matrix
Use this matrix to narrow the field quickly.
- Need 24 VDC at 5 A from a new unit? The Mean Well NDR-120-24 is the direct match.
- Need 12 VDC at 120 W and want the lowest listed price? The 120W 12VDC DIN Rail PSU fits.
- Want a blue 24V unit with an indoor/outdoor installation area? The MW NDR-120-24 5A Blue matches.
- Need 36 VDC and are willing to consider used hardware? The PULS QS20.361 is the only 36V unit here.
Product Notes
Mean Well NDR-120-24
The Mean Well NDR-120-24 is a new 24 VDC DIN rail supply rated at 5 A and 120 W. Its description lists universal AC input from 90 to 264 VAC, free-air convection cooling, and protections for short circuit, overvoltage, overload, and overtemperature. The screw terminal block output is a simple way to land a fixed 24V load. The reason to choose it is the straightforward set of specifications for a control-panel 24V bus. The limitation is that the output is capped at 5 A, so a heavier 24V load would need a supply with a higher current rating. At USD 31.64 it sits in the middle of the listed price range.
120W 12VDC DIN Rail PSU
The 120W 12VDC DIN Rail Power Supply provides 120 W for 12 VDC loads in a compact 1.7 x 4.8 x 5.1-inch case. The description mentions an input range of 100-240 VAC and efficiency rated at no less than 85 percent. This is the reason to reach for it when your control circuit runs on 12 VDC and you want to keep the initial spend down. The limitation is the fixed 12 VDC output, so it cannot serve a 24V or 36V rail. At USD 19.99 it carries the lowest listed price in the comparison.
MW NDR-120-24 5A Blue
The MW NDR-120-24 5A Blue is a new 24 VDC DIN rail supply rated at 5 A, with a blue housing and an indoor/outdoor installation area. The model number matches the Mean Well unit in this lineup, so the output profile is similar. The reason to choose it is the blue finish and the stated indoor/outdoor placement, which can help when the supply sits in a less protected enclosure. The limitation is the listed price: USD 44.99 is higher than the other 24V NDR-120-24 while delivering the same 24 VDC at 5 A.
PULS QS20.361
The PULS QS20.361 is the only 36 VDC option in this comparison and is sold in used condition. The product description says it has been confirmed to be in proper working order and may show light wear from previous use, such as light scratches or scuff marks. Choose it when your control circuit runs on a 36V rail and you are comfortable with a pre-owned unit. The limitation is tied to that used state and to the price: USD 49.00 is the highest listed price in the group, so the used condition does not come with a lower price tag.
Final Recommendation
Match the rail voltage first, then use listed price as a tiebreaker.
- For a new 5 A DIN rail supply from Mean Well, the Mean Well NDR-120-24 is the straightforward 24V pick.
- For a 12 VDC control circuit, the 120W 12VDC DIN Rail PSU gives you the lowest listed price in this group.
- For a blue 24V unit with an indoor/outdoor area, the MW NDR-120-24 5A Blue works, but you pay more for the same output.
- For a 36V rail, the PULS QS20.361 is the only 36V unit here, and it is used.
