初級	100V、115V、120V、230V、240V/50/60Hz 等常規電壓
次級	按顧客要求
製造標準	UL506，UL1411，EN61558，EN6060-1，UL2601，UL544
絕緣等級	B級、F級、H級
安裝方法	金屬上蓋1塊，橡膠墊2塊，螺杆螺栓一套，澆環氧

HengDa was established in 1994, specializing in designing and manufacturing Toroidal power transformers. We simplify the production process, improve quality, and achieve better aesthetics and performance, while keeping costs low. To improve production capacity, in 2002 we set up a new branch. We occupy 6000 square meters, and employ around 400 staff . We have various Torodial power transformers available, from 5VA to 20kVA. We accept both OEM and ODM business, with no minimum order quantity required. Delivery schedule is 7-28 days, depending on quantity, and design time is included. The size (outer diameter) of our power transformers range from 50mm to 360mm, with height from 40mm to 215mm. Our products have obtained the certificates including ISO9001, CESI, CE and ROHS. And we are trying to get the certification of UL. Please don't hesitate to contact us for further information. We always welcome you at any time.