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28VA Small Tele Communications Toroidal Isolation Transformer 280V To 22V/19.3V

Basic Information
Place of Origin: CHINA
Brand Name: WINLEY
Certification: ISO,CE
Model Number: 28VA
Minimum Order Quantity: 100Units
Price: $5-$1000
Packaging Details: Pallet
Delivery Time: 10-15days
Payment Terms: T/T
Supply Ability: 10000units/month
Detail Information
Usage: Tele-Communications Primary Voltage: 280V
Secondary Voltage: 22V/19.3V Terminal: Molex
Withstand Voltage: 4.5KV Material: 100% Copper
Frequency: 50/60Hz Type: AC Common Mode Coil
High Light:

28VA Toroidal Isolation Transformer


small step down transformer 280V To 19.3V


Toroidal Isolation Transformer 280V To 22V

Product Description

28VA Small Tele-Communications Toroidal Tansformer 280V To 22V/19.3V





1). Customized primary and secondary voltage

2). Variety of connection and harnessing options

3). Custom mounting and enclosures to meet customer requirements

4). Low height/easily configured into minimal space

5). Standard configuration of our Autotransformers provides a single winding with two end terminals, and one or more terminals at intermediate tap points. Secondary can be stepped up or stepped down. The exact voltage dependence on the Autotransformer configuration.

6). OEM/ODM is available.




Item Description
Capacity 28VA
Frequency 50/60Hz
Max. Temperature 60℃
Temperature rise <60℃
Insulation class B/F
Voltage ratio 280VAC-22V/19.3V
Winding material Copper
Insulation Resistance PRI.-SEC.: 500V DC 100 MΩ/Primary to Secondary 500VDC 100MΩ Min.
Short-Circuit of winding turn PRI. Iput: 440V AC 150HZ/ Primary and Secondary Not break down)
Hi-Pot Test PRI.-SEC.: 4.2KV/5mA/2S / Primary and Secondary Not break down )
Mounting metal plate Provided
Rubber gasket Provided
Standards VDE0550/IEC204-1/IEC61558/EC439
Warranty 24monthes





1). Green Power -- Coil core components for green energy market covering isolation transformers, drive inductors, line reactors, DC to AC conversion, etc.

2). Military -- Considering not only optimum cost, weight, size, but most important of reliability, our amorphous core transformers, 400Hz transformers, power chokes performance well to military industry.

3). Tele-communications -- Coilcore supply power chokes, filter chokes, common mode chokes, isolation transformers for ele-communication application.

4). Medical -- Coilcore focus on power solutions for the medical industry where reliability and performance are critical. Our toroidal medial power transormer with low stray field and low leakage current levels.

5). Industrial -- Our core compence magnetics including industrial control transformers, isolating safety transformers, high current inductors, and power inductors, with over 15 years long term project design experience.

6). Rail -- Safety and efficiency must come first, we obtain full experience of toroidal transformers, current transformers, high frequency transformers, power rail transformers, line filter chokes, emc filters, HF chokes for railway and train applications.


28VA Small Tele Communications Toroidal Isolation Transformer 280V To 22V/19.3V 0

28VA Small Tele Communications Toroidal Isolation Transformer 280V To 22V/19.3V 1

28VA Small Tele Communications Toroidal Isolation Transformer 280V To 22V/19.3V 2




1. Q: Can I have a sample order?

A: Yes, we welcome sample order to test and check quality.

2. Q: What is the lead time?

A: Sample time 3-7 days, we usually ship by DHL, UPS, FedEx,etc. Mass production time 7-25 days.

3. Q: How long is the warranty?

A: 24 monthes from B/L. If there are any accessory problems,just provide the photos of damaged accessory,then we will provide free service. According to the number of products,we will provide easily damaged accessories for free. we also can provide technical support if you need.

4. Q: Is OEM/ODM available?

A: Yes,it is! We are manufacturer with our own R&D team, we can customize products according to customer's drawing or requirements.

Customized services:

a. Customized color and special function.

b. Customized box.

c. Print customer's logo(MOQ:≥10pcs).

d. Your other ideas about product, we can help you design and put them into production. The above customized services must be confirmed before production.

5. Q: How to control the products quality?

A: Our company owns the core technology ,all kinds of products hold CE certificate. We have professional engineers. Workers are strictly required to make products according to the drawings. Each process has technical instructors.The QC supervisors will regularly inspect the production. We will do products performance tests during production, and comprehensive quality tests when the products is completed.

Contact Details

Phone Number : 86-18650108051

WhatsApp : +8618650108051