(0) Shopping cart
You have no items in your shopping cart.
Shopping Categories

    70VA Toroidal Transformer, 110V AC to 12V/35-0-35V

    5 out of 5 based on 2 reviews | Write a review
    70VA toroidal transformer with all copper wire, higher temperature resistant, small size with low weight, easy to install and maintain. The standard input is single 110V AC windings, designed to step down 110V to 12V or 2x35V (35-0-35 volt).
    SKU: ATO-T-C70VA
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    ATO 1 phase 70VA toroidal transformer, a single primary winding tapped at 220VAC 50/60Hz and 30-0-35 volt dual secondary windings, 12V output is available, it has been widely used in household appliances and other electronic equipment with high technical requirements.

    Advantages of ATO Toroidal Transformer

    1. High Efficiency: Winding matches core perfectly, which makes the transformer more efficiency.

    2. Long Service Life: With high quality materials and manufacturing technology, the transformer can be used for 30 years.

    3. Less Noise: The core is seamlessly rolled and the winding is set evenly over it, which makes the transformer quiet when it is working.

    4. Less Radiation: Toroidal structure and winding technology reduce electromagnetic radiation.

    5. Low Temperature Rise: Even it is overloaded at 120%, temperature rise will be less than 70℃.

    70VA Toroidal Transformer Specifications

    Model ATO-C70VA
    Phase Single phase
    Power 70VA (70W)
    Primary Voltage 110V AC (Optional: 110V, 120V, 220V, 230V, 240V)
    Secondary Voltage 12V AC (Optional: 12V, 24V, 48V, 110V, 220V, 2x6V, 2x12V, 2x15V, 2x24V, 2x30V, 2x35V, 2x40V, 2x50V, can be customized)
    Secondary Current 5.83A
    No. of Inputs 1 input
    No. of Outputs

    1 output (4-wire 2 outputs are available)

    Note: For the transformer with 2 outputs 4-wire, each output provides the same voltage and current level, the sum of 2 output power capacities is equal to the total capacity.

    Frequency 50Hz/60Hz
    Winding Material Copper Wire
    Coil Structure Toroidal
    Efficiency 90%-96%
    No-load Loss <1.26W
    Input Wire UL1015-18#Red
    Output Wire UL1015-16#Blue
    Voltage Strength DC2500V
    Insulation Impedance ≥500MΩ
    Cooling Method Natural air cooling
    Temperature +40℃
    Certification CE, RoHS, ISO, UL
    Warranty 12 months
    External Diameter 100mm
    Height 45mm
    Pedestal 100*100mm
    Mounting Hole Distance 90*90mm
    Weight 1.2kg
    Package Included 1*Toroidal transformer + 1*Accesorries sets (Nut, Shim, Metal disk, Rubber gaske, Pedestal, Screw)

    Toroidal Transformer Accessories

    toroidal transformer accessories

    Toroidal Transformer Mounting Methods

    toroidal transformer mounting method

    Toroidal Transformer Internal Structure

    toroidal transformer internal structure


    Tips: Principle of toroidal transformer

    When U1,a sinusoidal alternating voltage, is added to both ends of the primary coil, there is alternating current I1 in the conductor and alternating flux ф1 is generated, which passes through the primary coil and the secondary coil along the core to form a closed magnetic circuit. In the secondary coil, mutual inductance potential U2 is induced, and a self-inductance potential E1 is also induced by ф1 in the primary coil, which has the opposite direction and similar amplitude to that of the applied voltage U1, thereby limiting the size of I1. In order to maintain the existence of flux ф1, a certain amount of power consumption is necessary, and the transformer itself also has a certain loss. At this time, although the secondary coil is not connected with load, there is still a certain current in the primary coil, which is called "no-load current".

    If the secondary coil is connected with load, the current I2 is generated in the secondary coil, and the flux ф2 is generated consequently, which is opposite to flux ф1 in the direction, playing a counteracting role, so that the total magnetic flux in the core is reduced, thus reducing the primary self-inductance voltage E1. As a result, the current I1 increases, which shows that the primary current is closely related to the secondary load. When the secondary load current increases, I1 and ф1 increase, and the increase of ф1 supplements the flux counteracted by flux ф2 to maintain the total flux in the core unchanged. If the loss of transformer is not taken into account, it can be considered that the power consumed by the secondary load of an ideal transformer is the power obtained from the power supply initially.

    Existing reviews of 70VA Toroidal Transformer, 110V AC to 12V/35-0-35V
    Toroidal transformers are pure copper
    Pure copper wire to build the toroidal transformer did a great job, my audio has been installed, the seller is very thoughtful to send a fixed accessories, I will buy again.
    From: Brian | Date: 14/06/2022
    Was this review helpful? Yes No (0/0)
    Do you provide a 70kVA isolation transformer?
    Can your provide 70kVA isolation transformer with 3 inputs (460V, 480V, 690V) and 1 output (440V)?
    From: Knitter | Date: 12/05/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, we can.
    Load more reviews...
    Write your review for 70VA Toroidal Transformer, 110V AC to 12V/35-0-35V
    • Only registered users can write reviews
    • Bad
    • Excellent