EI 1VA-70VA Transformer

About the EI 1VA-70VA Transformer

The EI 1VA-70VA Transformer is part of the ELEHPD Power Transformer range. Technique parameter Iron core specification Power External size a b c d e EI-28 1VA 30 14 26 25 EI-35 1.5VA 37 17 31 48 32 2VA 38 20 32 48 33 EI-41 3VA 43 19 35 53 35 5VA 44 23 35 54 40 EI-48 8VA 51 22 42 61 39 10VA 51 28 42 65 48 EI-57 15VA 60 27 50 71 49 20VA 60 33 50 73 53 EI-66 25VA 69 34 58 82 56 30VA 69 37 58 82 58 EI-76 40VA 79 35 66 93 64 50VA 80 39 66 96 66 70VA 80 43 68 98 73 Characteristics: 1. The framework adopts the character, gong character or drawer model framework which are made with nylon and anti fire plastics. 2. Standard EI silicon steel piece circuit board component ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

Typical applications

Industrial control panels and PLC power rails
LED drivers, signage and display power
Battery charging and DC backup systems
Motor drives, welding sets and rectifier assemblies
Instrumentation and test equipment

How to specify the right Power Transformer

Size the output current with at least 20-30 % headroom over the load
Check the input range covers the local supply, including brown-outs
Confirm the enclosure and cooling method for the panel temperature
Verify the protection set: over-current, over-voltage, thermal and short circuit

Specifications

EI model small power transformer (1VA-70VA)

Technique parameter

Iron core specification	Power	External size
a	b	c	d	e
EI-28	1VA	30	14	26		25
EI-35	1.5VA	37	17	31	48	32
2VA	38	20	32	48	33
EI-41	3VA	43	19	35	53	35
5VA	44	23	35	54	40
EI-48	8VA	51	22	42	61	39
10VA	51	28	42	65	48
EI-57	15VA	60	27	50	71	49
20VA	60	33	50	73	53
EI-66	25VA	69	34	58	82	56
30VA	69	37	58	82	58
EI-76	40VA	79	35	66	93	64
50VA	80	39	66	96	66
70VA	80	43	68	98	73

Characteristics:
1. The framework adopts the character, gong character or drawer model framework which are made with nylon and anti fire plastics.
2. Standard EI silicon steel piece circuit board component

Frequently asked questions about the EI 1VA-70VA Transformer

How much headroom should I leave on the power rating?

For continuous industrial duty plan on 20-30 % headroom above the measured load. For loads with high inrush, such as motors or capacitive input, allow more and check the surge rating rather than only the average current.

Do these units accept 110 V and 230 V mains?

Input ranges are model-specific and shown in the specification table. Where a wide-range input is available it is stated; otherwise send your mains voltage and we will match the model.

What protection features are built in?

Typical protection covers short circuit, over-current, over-voltage and thermal shutdown. The exact set is listed per model in the specification table above.

Can you supply matching DIN-rail or enclosed versions?

Open-frame, enclosed and DIN-rail variants exist across this family. Send the model you are working from and we will confirm the equivalent mounting option.