When you're shopping for industrial power supplies transformers, the first decision isn't about brand or volts; it's about the size of the load you need to run and the trade-offs you're willing to accept. The Hammond PT50MLI and the HPS PH100MQMJ are two control transformers with different specifications and practical trade-offs. This head-to-head lays out those trade-offs so you can pick the fitting option for your panel.
Quick verdict: For a simple, well-defined control circuit, the Hammond PT50MLI is the practical choice. For a panel that needs more room to grow, the HPS PH100MQMJ is the stronger pick.
Here's a quick look at the key numbers:
| Product | Listed Price | Power Rating | Condition | Price Indicator |
|---|---|---|---|---|
| Hammond PT50MLI - BULK Industrial Control Transformer 50VA 208/230/460V to 115V | $44.99 | 50 VA | Used | |
| HPS PH100MQMJ 100VA Industrial Control Transformer 240x480V | $76.82 | 100 VA | New - Open box |
Where the Hammond wins: The Hammond is the right call for replacement work where you already know the control load and don't expect to add much later. Its 208/230/460V primary and 115V secondary line up with standard 120V control circuits.
Where the HPS wins: The HPS is the better fit for control panels with several devices or plans to expand. The higher rating gives you more margin when the circuit is likely to draw more current.
Hammond PT50MLI - BULK Industrial Control Transformer 50VA 208/230/460V to 115V
At $44.99, this Hammond is the less expensive option in this comparison, and the 50VA rating covers many smaller control circuits. The 208/230/460V primary and 115V secondary make it a practical candidate when your panel uses a standard 120V control bus. The bulk designation also signals a no-frills unit focused on function rather than packaging. If your load is around 50VA or less, the price is the strongest reason to choose it. The limitation is the used condition: you're buying a pre-owned transformer, not a fresh open-box unit. The 50VA ceiling also means less spare capacity if you later add devices, so it's best suited to a known, stable load rather than a growing panel.
HPS PH100MQMJ 100VA Industrial Control Transformer 240x480V
This HPS costs $76.82, which is roughly $32 more than the Hammond, but you get a 100VA rating and new-open-box condition. The HPS PH100MQMJ is from the Imperator line of industrial control transformers and is offered as a single unit. The extra capacity gives the transformer room to handle more than one control device, and the newer condition means you're not starting with a unit that has already been in service. The strongest reason to choose it is that combination of higher power and new condition. The limitation is the price: for a very small circuit that draws little power, the extra $32 may not be justified. You'd be paying for capacity and condition you may not need, which is why the Hammond remains the cheaper pick for simple jobs.
Final choice by use case:
- For a modest, well-defined control circuit where staying under budget matters, take the Hammond.
- For a panel with multiple loads or room to grow, take the HPS.
- For a quick replacement where you already know the transformer size, the Hammond matches the lower-cost side of the spectrum.
- For a new installation, especially one that may gain components later, the HPS gives you more headroom.
