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Quick Details

  • Place of Origin: Guangdong, China (Mainland)
  • Brand Name: DERNFU
  • Model Number: Annual transformr
  • Usage: Electronic
  • Phase: single phase or three phases
  • Coil Structure: Toroidal
  • Coil Number: Autotransformer
  • Web: www.dernfu.cn
  • Email: david@)dernfu.com;sale(@dernfu.com
  • Export quantity: 40000-70000PCS
  • Export country: The United States, southeast Asia, Europe, Middle East, Africa

Packaging & Delivery

Packaging Details Export package or client's demand
Delivery Time 10-30days



1. Universal Purpose small size, easy to install
2. Reliable Safety Approvals
3. Twin primaries / twin secondaries
4. Low profile & Low Weight
5. Low No-load Losses
6. Low Mechanical Hum
7. Low Stray Magnetic Field
8. Low Operating Temperature
9. High Efficiency
10. Good Static Insulation between Primary and Secondary
11. Punily Leakage Current
12. Easy to mount
13. Competitive price and customerized
14. Cost saving prices
a. 115/230 Primary &120/240 Primary Toroida32l Transforme30r Series 100VA~3000VA
b. Primary 100V, 115V, 120V, 230V, 240V / 50 Hz
c. Secondary Customized Power range: 20VA to 25KVA
d. Standard UL506, UL1411, EN61558, EN6060-1, UL2601, UL544
e. Insulation Class B, Class F, Class H
f. Mounting One Metal plate, Two Rubber pads, One set of bolt & nut with washer, centre-potting
g.130 Deg C Thermal Cutoff and Thermal Switch from 105 Deg C to 150 Deg C can be fitted when required.
h. All data are subject to modification without prior notice
i. Certificates: CE and RoHS.
1. Production Management Procedure:
a. Adapt international ISO9001 standard in factory and workshop, use modern scientific management system.
b. Imported advanced production facility, trained best skillful engineer and worker, organized a full quality control and R&D team.
c. Use refined material, such as core, wire, and copper, magnetic. Connecter ect. All raw materials have passed UL, CE, ROHS test.
d. Guaranty for the quality, ensure to provide the all-time technical and after sale service.
2. Quality Control:
1) No-load test (Included no-load voltage, no-load current and no-load loss)
2) Load test (Included load voltage and temperature rise)
3) Inductive voltage test
4) DC resistance test
5) Short circle protection
6) Insulation resistance
7) Hi-POT test
8) Outlook inspection and Packing inspection
3. Usage Application:
1) Audio amplifier equipment;High-end audio, multimedia audio, card Charter, civil power amplifier, mixer;
2) Communication equipment;Public broadcast system
3) Medical equipment;Medical beauty equipment
4) Electric control equipment;Mechanical NC equipment;Mahjong machine
5) Household appliances
6) Power control equipment
7) Lighting equipment;Stage lamps;Outdoor of LED bright lighting;Professional stage amplifier machine
8) Industrial control
Toroidal transformer input provides single windings, double-winding and three-winding, output can be provided ranging from single-winding to winding. Power from the smallest 20VA Max 5000VA. Overall dimensions minimum can reach H30x70mm, a minimum weight is 0.5kg.
For almost 20 years experience, we have a stronger design and research team, and can provide best service for OEM/ODM , with superior quality, accuracy usage function. Any inquiry please provide product usage, detail specification, datasheet ,engineering drawing, parameter demand or samples, also provide your purchasing quantity per order, order quantity in one year, delivery address , target price,etc.
Contact: More my company information, please visit website: www,dernfu.cn ; my email: david-dernfu.com; sales-dernfu.com, 86-0-13825752157. expect your more news.


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