When you're shopping for industrial power supplies transformers, the first thing you'll notice is that "power supply" can mean very different things. One option is a compact 12V 3A unit for door access systems; the other is a high-power REXROTH control power supply built for industrial cabinets. The price gap mirrors that difference: roughly $12.69 versus $2,474.68. Which one actually solves your problem? Here's a grounded head-to-head to help you decide.
Quick verdict
Pick the REXROTH HMV01.1E if your equipment needs 400-480V input and multi-kilowatt output, and your priority is a tested unit with a warranty. Pick the 12V 3A door access power supply if you're wiring a single electric lock or electromagnetic lock and need an inexpensive, compact supply that operates from ordinary 110-240V mains.
Side-by-side comparison
| Feature | REXROTH HMV01.1E-W0030 | 12V 3A Door Access Supply |
|---|---|---|
| Price | USD 2,474.68 | USD 12.69 |
| Price bar | ||
| Condition | Used & Tested | New |
| Input voltage | 400-480V | AC 110-240V |
| Output | 30 kW | DC 12V at 3A |
| Common purpose | Control power supply | Access control power supply |
Where each product wins
REXROTH HMV01.1E wins when you need high input voltage and serious output power. It's a Used & Tested control power supply with a two-year warranty, 60-day money-back, and lifetime professional support. If your application is a large industrial control panel or motor drive, this is the type of unit that belongs on the rail.
12V 3A door access power supply wins for small, low-voltage jobs. At $12.69, it is far easier on the wallet. It includes an adjustable 0-15s delay, a pluggable green terminal block, and a metal case. The input range covers standard household and light-commercial AC, making it approachable for access control installations.
Product notes
Used & Tested REXROTH HMV01.1E-W0030-A-07-NNNN Control Power Supply
This REXROTH unit is not for someone looking for a run-of-the-mill wall adapter. It accepts 400-480V input and outputs 30 kW, putting it in a completely different class from the door access supply. The condition is explicit: Used & Tested, with a two-year warranty, 60-day money-back, and lifetime support. That's a meaningful safety net when buying pre-owned industrial electronics. The limitation is the scale: you're paying $2,474.68, and you need a real need for that input/output profile. If your equipment doesn't require 400-480V, you're carrying a lot of cost and size for nothing. This is a specialist component for substantial systems.
12V 3A Power Supply Control for Door Access Control Access Control Power Supply
The 12V 3A door access supply is a new unit designed for electric locks and electromagnetic locks. It operates from AC 110-240V, 50-60Hz, and outputs DC 12V at 3A. The adjustable 0-15s delay and pluggable green terminal block make it easy to wire into an entry system, and the metal, copper, and aluminium construction adds durability. The biggest draw is the price: $12.69 for a new, purpose-built supply. The limitation is its low power output: 12V at 3A is meant for small locks, not industrial machinery. The input voltage also caps at 240V, so it won't serve high-voltage three-phase setups.
Final choice by use case
If you're designing or maintaining an industrial control system that needs a 30kW supply fed from 400-480V, choose the REXROTH. If you need DC 12V at up to 3A for a small access control installation and want a new unit, choose the 12V 3A door access power supply. Both are legitimate tools, but they serve different jobs.
