Manufacturer Single Phase 450VA 230v 36v Electric Toroidal Transformer for Audio Amplifiers

Item Capacity Static Current Efficiency Voltage Combination Case Qty. Model (VA) (mA) (%) Primary (V)/Secondary (V) (Pcs) DH-50 50 10 90 230/24; 220/24; 230/36; 220/36; 440/230; 230/12; 130-240/15-240; 115/24 24 DH-100 100 15 92 24 DH-150 150 20 93 24 DH-200 200 30 94 24 DH-250 250 35 94 18 DH-300 300 40 94 18 DH-350 350 45 95 18 DH-400 400 50 95 18 DH-450 450 55 95 18 DH-500 500 55 95 18 DH-550 550 55 95 18 DH-600 600 55 95 18 DH-700 700 60 95 12 DH-800 800 65 95 12 DH-1000 1000 75 95 12 Selection of Toroidal Transformer: Toroidal Transformers offer many advantages over standard laminated power transformers. Toroidals provide quiet, efficient operation with very low stray magnetic fields. Their small size and weight support a package that is easy to design into any application. * Capacity..............................................................................450VA * Frequency...........................................................................50/60Hz * Max. Temperature..............................................................60℃ * Temperature Class............................................................Class B (130℃) * Voltage Combination........................................................Pls. see selection form. * Winding Material................................................................100% Copper * Mounting Metal Disk.........................................................Provided * Rubber Gasket...................................................................Provided * Standards........................................VDE0550, IEC204-1, IEC61588, EC439 * Sample Service..................................................................Pay to Provide * Quality Assurance.............................................................24 months * Item Condition....................................................................Brand-New Advantages of Toroidal Transformer: 1. A toroidal transformer weighs about half as much as conventional transformer with the same capacity and heat rise. The main materials used in transformer are copper and steel, both of which are getting scarcer with cost increases as a consequence. 2. No impregnation is needed to keep the laminates quiet so this potential environmental hazard is avoided. 3. The toroidal transformer fits into a smaller space, which allows chassis plates and enclosures to be smaller with less material used. How to find VA for Transformers Volt amps (VA) is the effective power rating for a transformer. In the perfect transformer, the voltage and current (combined) applied at the primary will exactly equal the voltage and current (combined) on the secondary(s). Efficiency is measure of a transformer’s ability to delivery the input power to the load. Efficiency is expressed as a percent by: % = ( PO / PI ) X 100 (Where: PO = Output power, PI = Input power, % = Efficiency) 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. Yueqing Yomin Electric Co., Ltd (Before called Yueqing Yomin Electric Factory, found in 1996) is a manufacturer of electric appliances with well-equipped testing equipment and strong technical force. With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in electrical industry and other industries. Our products are widely recognized and trusted by users and can meet continuously developing economic and social needs. We welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success! 1. Who are we? We are based in Zhejiang, China, start from 2012,sell to South America(20.00%),Eastern Europe(20.00%),Mid East(20.00%),North America(15.00%),Domestic Market(15.00%),Africa(10.00%). There are total about 11-50 people in our office. 2. How can we guarantee quality? Always a pre-production sample before mass production; Always final Inspection before shipment; 3.What can you buy from us? Energy meter,Tile leveling system,Tile install pliers,Tile Level Regulator,Glass vacuum sucker 4. Why should you buy from us not from other suppliers? (1) Advanced equipment and technology (2) Excellent management and team (3) Fast response and shipment (4) Rich market and bidding experience (5) Efficient product development and customization 5. What services can we provide? Accepted Delivery Terms: FOB,CFR,CIF,EXW； Accepted Payment Currency: USD,EUR,CAD,AUD,GBP,CNY; Accepted Payment Type: T/T,L/C,Credit Card,PayPal,Western Union,Cash; Language Spoken: English,Chinese,Spanish,Japanese,Portuguese,German,Arabic, French,Russian, Korean,Hindi,Italian Why Work With Us? 23+ Years of Export Experience Full Certification Support (CE, ROHS, etc.) Fast Sampling & Mass Production Reliable Quality Control System Provide OEM/ODM Service