When you need to power a control circuit from an industrial panel, the first decision is electrical, not brand. Pick a VA rating that covers your load, then match the primary voltage to your incoming feed and the secondary voltage to your controls. The four industrial control transformers here spread across a wide price range, and each one balances capacity, voltage options, and condition differently.
Quick take
The Hammond PT50MLI is the lowest-priced entry. The Emerson SolaHD E150 sits in the middle of the price range. The HPS PH250MQMJ is the highest-capacity unit. The Square D 9070TF100D1 is the highest-priced option and is identified by its model number.
Listed price comparison
| Product | Listed Price | Price Bar | Capacity and Voltage |
|---|---|---|---|
| Hammond PT50MLI - BULK | USD 44.99 | 50VA, 208/230/460V primary, 115V secondary | |
| Emerson SolaHD E150 | USD 79.95 | 150VA, 240x480V primary, 120V secondary | |
| HPS PH250MQMJ | USD 149.99 | 250VA, 480V primary, 2.08A secondary | |
| Square D 9070TF100D1 | USD 175.00 | New Square D industrial control transformer |
Decision matrix
- Smallest budget: Hammond PT50MLI. The low price makes it the flexible starting point.
- Mid-size capacity: Emerson SolaHD E150. The capacity sits between the Hammond and the HPS.
- Highest capacity: HPS PH250MQMJ. The capacity gives you the most headroom.
- Part-number-specific: Square D 9070TF100D1. Choose this when you need this exact model.
Product notes
Hammond PT50MLI - BULK Industrial Control Transformer 50VA 208/230/460V to 115V
The Hammond PT50MLI is rated at 50VA with a 208/230/460V primary and a 115V secondary. At the lowest listed price in this group, it is an easy starting point for a small control circuit. The primary taps cover 208V, 230V, and 460V, which gives you flexibility if the feed side varies. The reason to be cautious is capacity: 50VA does not leave much headroom once you add a few relays or contactors, so it suits a small or lightly loaded control panel. The unit is also used, which explains the price position. For a modest load that fits within 50VA, the low price and the voltage flexibility are the main draws.
NEW Emerson SolaHD E150 Industrial Control Transformer 150VA 240x480V to 120V
The Emerson SolaHD E150 is a 150VA transformer with a 240x480V primary and a 120V secondary. It is new open-box and sits in the middle of the price spread, between the smaller Hammond and the higher-capacity HPS. That position makes it a balanced choice when you need more capacity than 50VA without going to the top of the price range. The 240x480V primary is a practical fit for many 240V or 480V control panels. The trade-off is that it costs more than the Hammond, so if your load is small, you may be paying for capacity you do not need. For a panel with several control devices, the 150VA rating and mid-level price make this a solid middle option.
Square D 9070TF100D1 Industrial Control Transformer New USA
The Square D 9070TF100D1 is a new unit and the highest-priced item in this comparison. The model number is the main identifier, so this is best treated as a part-number-specific purchase. If your control panel design already calls for this exact Square D model, the new condition and the direct model match make it a straightforward option. The practical limitation is that choosing it depends on knowing that this exact model fits your application. For buyers who need this particular part, the price is the cost of getting a new unit with the right model number.
HPS PH250MQMJ Industrial Control Transformer 250VA 480V 2.08A
The HPS PH250MQMJ gives you the most capacity in this group at 250VA, with a 480V primary and a 2.08A secondary. It is priced below the Square D unit, which makes it an attractive option when you need more capacity than the Emerson but do not need a specific part number. The 250VA rating is the main reason to consider it: there is room for contactors, relays, pilot lights, and other control loads on one transformer. The trade-off is that this unit centers on a 480V primary, so it belongs in an application where 480V is the available feed. If your panel uses 240V, the Emerson is the more direct comparison. For a 480V control panel with a substantial load, the HPS balances capacity and price.
Final recommendation by use case
- Lowest price with flexible primary taps: Hammond PT50MLI at USD 44.99.
- Mid-range capacity between the Hammond and the HPS: Emerson SolaHD E150 at USD 79.95.
- Highest capacity when you need more headroom: HPS PH250MQMJ at USD 149.99.
- Exact part-number replacement: Square D 9070TF100D1 at USD 175.00.
