Decision at a glance
Two DIN-rail power supplies are on the table, and they are not interchangeable. The MEAN WELL SDR-240-48 accepts 100-240V AC and produces 48V DC at 5A with a 240W rating. The Puls QT20.241 accepts 480V AC and produces 24V DC. Listed prices are USD 52.00 for the MEAN WELL and USD 225.00 for the Puls, so the choice starts with matching your supply voltage and load voltage.
Quick verdict
If your panel runs on standard 100-240V AC and needs 48V, the MEAN WELL is the straightforward, lower-priced option. If your incoming service is 480V AC and you need a 24V control rail, the Puls is the correct fit.
Price and key specs
| Product | Listed price | Price bar | Output | Input |
|---|---|---|---|---|
| MEAN WELL SDR-240-48 | USD 52.00 | 48V DC, 5A, 240W | 100-240V AC | |
| Puls QT20.241 | USD 225.00 | 24V DC | 480V AC |
Where each product wins
The MEAN WELL wins on listed price and on adjustability: its description includes adjustable output voltage from 48 to 55V and adjustable current from 0 to 5A, plus a claimed efficiency up to 94% and a -25 to +70°C operating range. That makes it a flexible 48V source for a modest outlay.
The Puls wins on input compatibility with 480V AC services. It steps that higher voltage down to a 24V DC rail without needing an external transformer, and it is listed as new open box with the QT20.241 MPN.
Product notes
MEAN WELL SDR-240-48 240W 48V 5A AC to DC DIN-Rail Power Supply 100-240v input
The MEAN WELL is the lower-priced unit and the one to choose when you need 48V DC. It delivers 240W at 5A, with adjustable voltage and current described, and its DIN-rail mount and slim 63mm width suit a compact panel. The limitation is its input: it expects 100-240V AC, so a 480V AC feed is out of range unless you install an additional transformer.
New Puls QT20.241 DIN Rail Power Supply 480VAC Input 24VDC Output
The Puls is the pricier unit, and the extra outlay buys a specific capability: it accepts 480V AC input and converts it to 24V DC output. That makes it a direct fit for industrial panels tied to higher-voltage services. It is listed as new open box. The limitation is that it outputs 24V DC, not 48V DC, so it is the right choice only when your load is 24V and your feed is 480V.
Final choice by use case
- For a 48V load on a standard 100-240V AC panel, the MEAN WELL SDR-240-48 offers 240W and adjustable output at the lower listed price.
- For a 24V control circuit supplied from 480V AC, the Puls QT20.241 matches that input voltage directly, despite the higher listed price.
Match the input voltage and output voltage first; the price difference ($173) then simply reflects the different role each unit plays.
