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Waterproof Type Toroidal Tansformer

Basic Information
Place of Origin: CHINA
Brand Name: WINLEY
Certification: ISO,CE
Model Number: 300VA
Minimum Order Quantity: 100Units
Price: $20-$600
Packaging Details: Pallet
Delivery Time: 10-15days
Payment Terms: T/T
Supply Ability: 10000units/month
Detail Information
Usage: Pool Type: Waterproof
Primary Voltage: 220-240VAC Secondary Voltage: 12VAC/25A
Protection: 130℃ Thermal Fuse IP Class: IP67
Material Type: UL94-V0 Cooling Method: AN
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Waterproof Type Toroidal Tansformer


toroidal auto transformer 240VAC


300VA Toroidal Tansformer

Product Description

300VA Waterproof Type Toroidal Tansformer 220-240VAC 12VAC/25A


(1) Core from 0.23mm thick silicon steel Japanese materials 23Q115 edges are ground smooth
(2) Core protection from 4 layers polyester films (2 layers with 50% overlap)
(3) Primary winding wire ( polyesterimid enameled QZY 180) and temperature class 180°
(4) Primary leads from type UL1672 double insulation for 600V voltage and 105° temperature




Max. Temperature60℃
Temperature rise<60℃
Insulation classB/F
Voltage ratio220-240VAC-22VACx2
Winding materialCopper
Insulation ResistancePRI.-SEC.: 500V DC 100 MΩ/Primary to Secondary 500VDC 100MΩ Min.
Short-Circuit of winding turnPRI. Iput: 440V AC 150HZ/ Primary and Secondary Not break down)
Hi-Pot TestPRI.-SEC.: 4.2KV/5mA/2S / Primary and Secondary Not break down )
Mounting metal plateProvided
Rubber gasketProvided



VA Calculation


1. Read the transformer’s secondary winding rating (printed or tagged on the transformer case). This should give a rating such as 5V, 500mA.

Multiply the voltage times the current to receive the VA.

Example: 5V times 500mA (or 0.5A) equals 2.5VA

2.Convert the secondary winding VA value to the primary winding VA rating as the equation VA (Primary) equals VA (Secondary) or VA (p)=VA(s)

For example of a 2.5VA secondary, if the primary voltage is 120V the current will be A (p) = VA(s) / V(p). Giving A(p) = 2.5 / 120 = 0.020833(roughly 21mA).

This is the calculation for a single input winding/single output winding transformer.

3. Add the separate VA ratings for a transformer with multiple secondary windings.

For secondary winding 1 = 5VA at 500mA

Secondary winding 2 = 24V at 100mA

Total Secondary VA = ( 5 X 0.5 ) + ( 24 X 0.1 ) = 4.9VA

Primary VA will still equal the total secondary VA.


Waterproof Type Toroidal Tansformer 0




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