When you're shopping for industrial power supplies transformers, the right pick comes down to the voltage your control circuit needs and the VA load it presents. The Emerson SolaHD E150 and the ACME TA-2-81321 are both new control transformers, but they're built for different jobs. One is a higher-capacity unit with flexible taps; the other is a straightforward transformer for a lighter circuit. The SolaHD is designed as a workhorse for panels with multiple loads, while the Acme goes after a single, focused task. This head-to-head helps you decide which one fits your cabinet.
Quick Verdict
The Emerson SolaHD E150 is the transformer to choose when your control panel needs substantial power headroom. The ACME TA-2-81321 is the pick when you want a simple, no-frills unit for a modest control circuit. If you're not sure yet, the comparison table below makes the technical differences clear.
Comparison Table
| Product | Price | VA Rating | Primary Voltage | Secondary Voltage |
|---|---|---|---|---|
| Emerson SolaHD E150 | $79.95 | 150VA | 240x480V (also 230/460, 220/440) | 120V (also 115, 110) |
| ACME TA-2-81321 | $44.99 | 50VA | 208/480V | 24V |
Where Each Product Wins
The SolaHD E150 is the better fit when your control panel is loaded with relays and contactors and you need spare capacity. It also gives you more wiring options, and its epoxy-encapsulated core stands up to demanding environments. It's the kind of transformer you install once and forget, even as you add more devices to the panel later.
The ACME TA-2-81321 is the better fit when you have a simple control loop and want a transformer that is easy to wire. It has no extra taps to think about, and it matches your existing supply directly. It's a fine choice for a dedicated machine with a fixed, known load.
Product Notes
Emerson SolaHD E150
The SolaHD E150 offers the power headroom to run several relays and contactors at once, along with multiple primary and secondary taps for supply flexibility. The included mounting hardware, shorting clips, and fusing instruction sheet simplify installation. The trade-off is that this amount of capacity is more than a simple low-voltage control loop needs, so you may be paying for headroom you don't use. The multi-tap flexibility is useful, but it adds a bit of complexity during wiring.
ACME TA-2-81321
If your supply is 208/480V and you need a low-voltage secondary, the ACME TA-2-81321 is a direct and uncomplicated match. It's sized for a single modest load-a small relay, a few pilot lights, or one compact controller. The absence of extra taps keeps wiring simple: land your primary and secondary leads and you're done. The limitation is capacity: it won't support a panel full of contactors or multiple control devices. If your load is larger, you'll want the heavier-duty SolaHD instead. For a basic low-voltage control loop, though, this unit gets the job done with less complexity.
Final Choice by Use Case
Choosing the right one comes down to your control voltage and the amount of load you expect. For a 120V control panel with a heavier load, spend $79.95 on the Emerson SolaHD E150. You get the power headroom, wiring flexibility, and robust construction. For a 24V control circuit with a light load, spend $44.99 on the ACME TA-2-81321. It's the direct option for a simple control loop.
