In the market for industrial power supplies transformers, you're comparing two jobs as much as two boxes. The Hammond PT50MLI is a 50VA industrial control transformer that steps down to 115V AC, while the 12V 3A Access Control Power Supply is a compact DC source for electric locks and access control systems. Prices sit far apart at $15.22 versus $44.99, and so do their outputs. The right pick depends on what you're wiring.
Quick Verdict
If you need 115V AC control power from a traditional-style control transformer, the Hammond PT50MLI is your match. If you're powering 12V door access hardware, the 12V 3A Power Supply wins on price and purpose.
Price and Spec Snapshot
| Product | Price | Output | Condition | Best fit |
|---|---|---|---|---|
| Hammond PT50MLI - BULK Industrial Control Transformer 50VA | USD 44.99 | 115V AC secondary | Used | Industrial control circuits needing 50VA |
| 12V 3A Power Supply Control for Door Access Control | USD 15.22 | 12V DC at 3A | New | Access control and electric locks |
Where the Hammond PT50MLI Wins
The Hammond is a real control transformer, not a DC supply. Its 50VA rating and 115V AC secondary are well-suited for industrial control circuits. The listed 1:15 turns ratio gives you a concrete spec to match in transformer applications. It's listed as used, so condition is a consideration, but for a dedicated 115V AC transformer role, it's the one that fits.
Where the 12V 3A Access Control Power Supply Wins
The 12V unit is new, includes short-circuit protection, and has a compact metal housing. It's purpose-built for access control, delivering stable 12V DC to electric locks and electromagnetic locks. If your system runs on 12V DC, this is the more purpose-built option.
Product Notes
Hammond PT50MLI - BULK Industrial Control Transformer 50VA 208/230/460V to 115V
With a 50VA rating and a 115V AC secondary, this Hammond transformer is built for control circuits that need traditional AC power. The 1:15 turns ratio is a concrete spec that helps you match it to your transformer application. It's listed as used, so you'll want to confirm it suits your installation before committing. At USD 44.99, it's the higher-priced unit in this pair, but that price points to a specific industrial transformer role rather than a general-purpose DC supply. If your project centers on a 115V AC control transformer, this is the one to choose.
12V 3A Power Supply Control for Door Access Control, Access Control Power Supply
For USD 15.22, this access control power supply delivers stable 12V DC at 3A to electric locks and electromagnetic locks. It's new, and its compact metal housing, finished with a spray-painting process, resists rust and deformation. Short-circuit protection improves safety for the attached mechanism, and the compact structure makes installation easy in tight spaces. That makes it a strong pick for access control installations. The limitation is that it's not a substitute for a 115V AC transformer; it's a DC supply for 12V access control systems. Choose it when your door hardware runs on 12V and you want a low-cost, dedicated power source.
Final Choice by Use Case
Go with the Hammond PT50MLI if you need a 50VA control transformer with a 115V AC secondary for an industrial control circuit. Go with the 12V 3A Access Control Power Supply if you're wiring 12V door access hardware and want a new, low-cost power source with short-circuit protection.
