When you're building or repairing machine tool controls, the control transformer has to supply enough power for contactors, relays, and pilot lights without browning out under inrush. The decision usually boils down to VA rating and listed price. Here, the HPS PH250MQMJ and HPS PH100MQMJ represent two ends of that tradeoff: more capacity in the 250VA unit, a lower listed price in the 100VA unit.
Quick Verdict
Pick the HPS PH250MQMJ (USD 149.99) when your load calculation calls for 250VA and a 2.08A secondary at 480V. Pick the HPS PH100MQMJ (USD 76.82) when 100VA covers your control circuit and you want the lower listed price.
At a Glance
| Product | Listed Price | Price Bar | Key Specs |
|---|---|---|---|
| HPS PH250MQMJ 250VA 480V | USD 149.99 | 250VA, 480V, 2.08A secondary | |
| HPS PH100MQMJ 100VA 240x480V | USD 76.82 | 100VA, 240x480V model |
Where Each Product Wins
- HPS PH250MQMJ wins on capacity: If your control panel needs more than 100VA, the 250VA rating provides significant headroom for higher-inrush loads.
- HPS PH100MQMJ wins on listed price: At USD 76.82, it offers the lower upfront cost for applications that stay within 100VA.
Product Notes
HPS PH250MQMJ 250VA Industrial Control Transformer
The HPS PH250MQMJ is a 250VA industrial control transformer with a 480V primary and a 2.08A secondary, listed at USD 149.99 by KR Automation. If your machine tool panel has multiple contactors or a control circuit with meaningful inrush current, the extra VA capacity is the main reason to choose this unit. The listing describes it as a good part in good condition, and notes it may represent an older version or date code than what authorized dealers carry. Since the price is higher than the 100VA option, the deciding factor is whether your load actually needs the extra 150VA of headroom.
HPS PH100MQMJ 100VA Industrial Control Transformer
The HPS PH100MQMJ is a 100VA control transformer with a 240x480V model designation, listed at USD 76.82 by D&B Surplus. It's described as a machine tool control transformer with screw terminals and panel mounting, and is listed in new open-box condition. The low listed price is the headline here, making it a cost-conscious pick for smaller control panels. The limitation is the VA rating: 100VA won't cover loads that demand the capacity of the 250VA unit. Also keep in mind that the listing shows a 105°C insulation class and a 55°C temperature rise, which can matter if your enclosure runs warm.
Final Choice by Use Case
Choose the HPS PH250MQMJ if your control circuit needs 250VA at 480V with a 2.08A secondary and you want the capacity to handle inrush without under-sizing. Choose the HPS PH100MQMJ if your panel draws within 100VA and the lower listed price is your priority.
