Choosing between two industrial control transformers usually comes down to two questions: Does the VA rating cover the combined load of your contactors and relays, and does the voltage configuration match the power feeding the cabinet? The HPS PH250MQMJ and the Emerson SolaHD E150 answer those questions in very different ways.
Quick verdict
If your control circuit needs extra capacity and you're working with a 480V feed, the HPS PH250MQMJ is the higher-VA choice. If you want multi-voltage wiring flexibility at a lower price and 150VA is enough, the Emerson SolaHD E150 is the practical pick.
At a glance
| Product | Capacity / Configuration | List Price | Price Bar |
|---|---|---|---|
| HPS PH250MQMJ | 250VA, 480V, 2.08A | USD 149.99 | |
| NEW Emerson SolaHD E150 | 150VA, 240x480V primary / 120-115-110V secondary | USD 79.95 |
Where each product wins
- HPS PH250MQMJ wins for capacity. With a 250VA rating and a 480V, 2.08A configuration, it gives you more headroom for circuits with multiple control devices.
- Emerson SolaHD E150 wins for voltage flexibility. Its description lists a 240x480V primary that can also be wired for 230x460V or 220x440V, with secondary outputs of 120V, 115V, or 110V.
Product notes
HPS PH250MQMJ Industrial Control Transformer 250VA 480V 2.08A
If your control circuit includes several contactors, relays, and indicator lights, the HPS PH250MQMJ gives you the largest capacity in this head-to-head. The 250VA rating provides noticeably more reserve than the Emerson's 150VA, which can help keep voltages stable when several loads energize at once. The listed 480V, 2.08A configuration aligns with common 480V distribution systems, making it a straightforward choice for that kind of panel. The main limitation is that the listing describes a focused 480V setup, while the Emerson details multiple primary and secondary taps. If your cabinet needs the kind of multi-voltage adaptability found on the Emerson, the HPS may be narrower in scope. For a direct 480V application where capacity matters, this is the stronger option.
NEW Emerson SolaHD E150 Industrial Control Transformer 150VA 240x480V to 120V
The Emerson SolaHD E150 is the smaller transformer here, but it's also the more adaptable one. The description spells out a 240x480V primary with alternate hookups for 230x460V and 220x440V, plus secondary outputs of 120V, 115V, or 110V. That makes it useful for panels that may be fed from different line voltages or that need a specific control voltage. It's a 150VA unit, so it suits small control trays with modest loads rather than high-current multi-device panels. It also includes a mounting hardware kit, shorting clips, and a fusing instruction sheet, which can simplify installation. The main limitation is its 150VA ceiling; if your load is larger, you'll need to move up to a bigger transformer.
Final choice by use case
If the extra 100VA of the $149.99 HPS PH250MQMJ fits a load you're expecting, that capacity is the reason to choose it. If the $79.95 Emerson SolaHD E150 covers your current draw and you want the freedom to switch between 240x480V and 120/115/110V secondary wiring, it's the better buy for your cabinet.
