EI-8X18 1.5VA Blue transformer

EI-8X18 1.5VA Blue transformer Utilizes a standard EI-type core (e.g., size EI-8X18 refers to the length and thickness of the silicon steel sheets). The magnetic circuit is formed by the central protrusion of the E sheet and the closed I sheet. The windings are wound with copper wire and protected by an external shell (the blue shell may indicate a specific safety level or application type). It supports pin-type (PCB soldering) or lead clip-type installation, resulting in a compact structure and moderate cost.

Product Details

Main Features

Performance parameters: Capacity 1.5VA (micro range), low no-load loss (≤3W), input voltage compatible with 110V/220V AC; insulation grade is generally Class B (130°C), dry design does not require insulating oil, temperature rise limit ≤60K, protection grade IP20 prioritizes dust and touch protection.

Operating characteristics: Power frequency operation (50Hz/60Hz), low magnetic leakage, but there may be slight vibration noise; high efficiency and energy saving, energy transfer through magnetic coupling, low passive loss.

Applicable Scenarios

Industrial Control: Provides 24V/36V safe isolated power for machine tool PLC controllers and contactors, ensuring accurate command execution and reducing the risk of electric shock.

Power supply for small devices: used as a regulated power supply in instruments (such as sensors and detectors), or to provide impedance matching for audio signal processing equipment (such as amplifier auxiliary circuits).

Safety lighting system‌: Used for low-voltage LED lighting (such as indicator lights on mechanical operating tables). The blue housing may enhance the anti-touch identification and is suitable for indoor environments (temperature 5°C–40°C).

Model parameter

Item	Core type	Output power（w)	Item	Core type	Output power（w)
EI28	EI28/8x12	0.5-1	EI57	EI57/19x30	16-32
EI28	EI28/8x16	0.7-1	EI57	EI57/19x38	20-40
EI35	EI35/9.6x10	0.2-0.8	EI66	EI66/22x22	17-35
EI35	EI35/9.6x12.5	0.25-1	EI66	EI66/22x 28	24-45
EI35	EI35/9.6x16	0.4-1.7	EI66	EI66/22x35	36-58
EI35	EI35/9.6x20	0.6-2.5	EI66	EI66/22x45	55-77
EI41	EI4/13x13	0.6-2.3	EI76	EI76.2/25.4x25	65-88
EI41	EI41/13x16	1-36	EI76	EI76.2/25.4x31.5	71-95
EI41	EI41/13x21	1.6-5.5	EI76	EI76.2/25.4X40	70-97
EI41	EI41/13x26	2.3-7.7	EI76	EI76.2/25.4X50	86-123
EI48	EI48/16x16	2-5	EI85.8	EI85.8/28.6x29	70-95
EI48	EI48/16x20	2.8-7.2	EI85.8	EI85.8/28.6x36	84-120
EI48	EI48/16x25	4.6-11.1	EI85.8	EI85.8/28.6x46	105-154
EI48	EI48/16x32	7-10	EI85.8	EI85.8/28.6x58	130-200
EI54	EI54/18x18	5-12	EI96	EI96/32x40	100-150
EI54	EI54/18x22.5	8-17	EI96	EI96/32x45	110-160
EI54	EI54/18x29	11-25	EI105	EI105/35	500-700
EI54	EI54/18x36	17-34	EI114	EI114/38	700-1000
EI57	E157/19x19	7-16	All the output voltage and current are according to customers requirements
EI57	EI57/19x24	14-21

2.Model parameter.jpg

How it works

When input AC power (such as 220V/50Hz) passes through the primary winding, an alternating magnetic field is generated. This magnetic field forms a closed magnetic circuit through the iron core composed of laminated E-type and I-type silicon steel sheets. The iron core acts as a low-reluctance path and efficiently conducts magnetic flux, causing the secondary winding to induce an electromotive force and achieve voltage conversion (such as reducing the voltage to a safe voltage).

The voltage conversion ratio is determined by the winding turns ratio (N₂/N₁). For example, more turns on the primary side will increase the voltage, while fewer turns will decrease the voltage. This process relies on AC input and will not work with DC.

Energy is transferred through magnetic circuit coupling, and there is no direct electrical connection between the primary and secondary sides, ensuring electrical isolation.