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Tianjin Grewin Technology Co., Ltd.

Toroidal Transformer Core, Copper Core Transformer 220V 12V, 240V 12V Transformer Price manufacturer / supplier in China, offering Silicon Steel Toroidal Transformer for Home Appliance, High Quality Toroidal Minature Current Transformer, Accuracy 0.1 0.2 Minature Current Transformer for Electrical Watthour Meter and so on.

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Silicon Steel Toroidal Transformer for Home Appliance

Purchase Qty.:
1-99 100-499 500-999 1,000+
FOB Unit Price: US $21.5 US $16.2 US $14.5 US $14.2
Purchase Qty. (Pieces) FOB Unit Price
1-99 US $21.5
100-499 US $16.2
500-999 US $14.5
1,000+ US $14.2
Get Latest Price
Production Capacity: 50000 PCS
Transport Package: Export Standard Carton or Customize Strong Pallet
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: 100va 250va 450va 1300va 2600va 4000va 6000va
  • Phase: Single
  • Cooling Method: Dry-type Transformer
  • Certification: ISO9001-2000, UL, ISO9001, CCC, CE
  • Frequency Characteristics: High Frequency
  • Brand: Grewin Toroidal Transformer
  • Coil Number: Autotransformer, High Flux Density Grain- Oriente
  • Toroida Step Down Transformer: Low Rise High Efficiency Toroidal Transformer
  • 95% Efficiency: Transformer Toroidal Price Design Manufacture
  • Short-Circuit-Proof Safety: Isolating Transformer
  • Test Process1: Iinductive Voltage Test, Temperature Rise Test
  • Specification: CE
  • HS Code: 85043190
  • Application: Power, Electronic, Lighting, Audio
  • Core: Toroid Core
  • Winding Type: Auto-transformer
  • Usage: Household Applicance, Houseld Audio, Household Light
  • Shape of Core: Ring
  • Coil Structure: CE UL Toroidal Transformer
  • Toroidal Transformer Type: 194va 25va Va 500va 3kVA 6000va Toroidal Transfor
  • Leads - Length and Insulation: Secondary Windings Connections
  • Toroidal Transformer: 500va 1000va 2500va 3000va 6000va
  • Application1: Home Appliance, Household Audio Device
  • Trademark: Grewin Toroidal Transformer
  • Origin: China
Product Description
Silicon Steel Toroidal Transformer for Home Appliance
1.  technical parameters.
Toroidal  Transformer 
PowerInput Voltage(V)Output Voltage(V)Dimension
Weight (kg)
GWB500VA220V (230V)12V145*655.5
GWB1000VA220V (230V)12V175*858.5
GWB2000VA220V (230V)12V210*9014.7
GWB2500VA220V (230V)12V210*10016.7
GWB3000VA220V (230V)12V215*10517.7
GWB3500VA220V (230V)12V230*11521.8
GWB5000VA220V (230V)12V290*11530
GWB7000VA220V (230V)12V330*11531.5

PowerInput Voltage(V)Output Voltage(V)Dimension
Weight (kg)
GWB50VA220V (230V)12V80*380.74
GWB100VA220V (230V)12V95*451.25
GWB200VA220V (230V)12V112*522.05
GWB250VA220V (230V)12V118*543.36
GWB500VA220V (230V)12V140*654.2
GWB1000VA220V (230V)12V170*757.2
GWB1500VA220V (230V)12V180*859.75
GWB2000VA220V (230V)12V185*10512
GWB3000VA220V (230V)12V200*12016.6
GWB5000VA220V (230V)12V230*13524

2.  We have abtained VDE,UL,CE,ISO9000 approval .we guarantee quality is the first.
Test process

1  .No-load test (included no-load voltage,no load current and no load loss)

 2.iInductive voltage test 

 3. Load test (load voltage and temperature rise

 4. Temperature rise test .

 5.Insulated resistance 

 6.Hi-pot test 

 7.Leakage indutance test 

 8.DC resistance test 

 9.Surface inspection.

3.customized audio toroidal transformer and solar energy transformer   Application:

Silicon Steel Toroidal Transformer for Home Appliance


Especially low-hum and low-dispersing construction
Low-level of induction
High-grade design casing possible
Statically shield winding and magnetical shield winding optional .

1). Application:

1. audio equipment 
2. electric control
3. computer
4. solar device
6.high-end and middle-end vedio etc

2).  Advantages:

1.High quality 100% copper core

2.a full range of toroidal transformer

3.Specially sales and technical services:5-10Years

4.With 14 years' producing history in transformer induatry

5.our company have cooperated with many customers around the world and gained good reputation at home and abroad.


The above-mentioned toroidal transformer is frequently-used, we can also manufacture the products by customer design. And the specification is for reference, if has the change further, please take the material object as the standard.

4).GREWIN'S Dimension :
External diameter: 40mm-300mm, height :13mm-130mm, Efficiency: 75-98%

we can design the appropriate products according to customers' requirments such as installation dimension, input and output voltage,power...etc.)


 4.product procedure 

The following picture showed you about all finished toroidal transformer production line and package with export standard carton and strong pallets:

Silicon Steel Toroidal Transformer for Home Appliance

 About us:

 1. Tianjin Grewin Technology Co.,ltd. has always laying great emphasis on our core business philosophy "Quality and Honesty First ". Due to continuous innovative research and development, our products have meet the technical standards and safety standards , which are efficient and environment-friendly. As a professional leading and a main exporter of a wide variety of electronic components in China for many years, we adhere to new products, quality to meet the needs of you and welcome all of you to negotiate

Silicon Steel Toroidal Transformer for Home Appliance
2.Flow chart of trading activities:




Days need


Request for quotation

1 day


Making quotations

1 day


Offer and counter offer

3 days


Sending and receiving samples

3-10 days


Sample confirmation

3 days


Placing a firm order

1 day


Paying and receiving the down payment

1-4 day


Factory production & Quality inspection

15-20 days


Paying and receiving the balance

4 days


Delivery of goods

1 days


Contact Information:                                                        


Tianjin Grewin Technology Co.,Ltd.



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