In the industrial power supplies transformers aisle, you're often choosing between two different jobs: delivering regulated DC power to electronic controls, or stepping down AC line voltage for electro-mechanical devices. The 120W 24VDC DIN Rail Power Supply and the HPS PH100MQMJ 100VA Industrial Control Transformer reflect that split. Picking the right one saves time, money, and cabinet space.
Quick Verdict
If your system needs a steady 24V DC bus, get the 120W 24VDC DIN Rail Power Supply for $22.99. If your controls run on 120V or 240V AC and need a hard-working transformer, the HPS PH100MQMJ 100VA at $76.82 is the better fit.
Comparison Table
| Feature | 120W 24VDC DIN Rail Power Supply | HPS PH100MQMJ 100VA Control Transformer |
|---|---|---|
| Price | $22.99 | $76.82 |
| Output | 24V DC, 5A | 100VA AC, 120/240V secondary |
| Input | 100-240V AC | 240/480V AC primary |
| Mounting | DIN rail | Panel mount, screw terminals |
| Condition | New | New - open box |
Where Each Product Wins
The DIN rail supply wins on price, size, and the convenience of a regulated DC output. It takes any input from 100 to 240V AC and delivers 24V DC at up to 5A, with at least 85% efficiency in a compact 1.7 x 4.8 x 5.1in package. The HPS transformer wins when you need to power AC controls from a 240 or 480V line. It offers 100VA capacity, screw terminals, and a panel-mount design that fits machine-tool control panels.
Product Notes
120W 24VDC DIN Rail Power Supply
The 120W supply steps a broad AC input range down to a regulation-grade 24V DC output at 5A. That makes it a natural fit for PLCs, sensors, and indicators that expect a stable DC voltage. The unit's 1.7 x 4.8 x 5.1 inch footprint slides onto a DIN rail, so installation in a crowded cabinet is straightforward. Its 85% efficiency also means less waste heat. The main thing to keep in mind: it outputs DC only. If your panel is built around 120V or 240V AC contactors and control circuits, this supply won't step down AC line voltage for them.
HPS PH100MQMJ 100VA Industrial Control Transformer
This 100VA transformer from HPS is built for machine tool and industrial control panels. It can be wired to accept a 240V or 480V primary and provide a 120V or 240V secondary, giving you flexibility across different plant voltages. The screw terminals make wiring secure, and the panel-mount form factor fits typical control enclosures. One thing to expect: the output is unregulated AC, not a clean DC bus. So it's ideal for relays, contactors, and transformer-rated loads, but electronics that need stable DC will require an additional power supply. Also, the unit arrives in new open-box condition, ready to mount.
Final Choice by Use Case
Choose the 120W 24VDC DIN Rail Power Supply when you need a reliable DC source for automation components. Choose the HPS PH100MQMJ when your control circuit operates on stepped-down AC and you want a simple, transformer-based solution.
