70021 ACME ELECTRIC, 70021 Datasheet - Page 3

• Manufacturer Part Number: 70021
• Description: Toroidal Transformer
• Manufacturer: ACME ELECTRIC

Specifications of 70021

• Power Rating: 5VA
• Secondary Voltages: 2 X 9V
• Secondary Current Nom: 2mA
• Transformer Mounting: PC Board
• Weight: 144g
• Transformer Type: Toroidal
• Secondary Current Aac: 278mA
• Output Current, Secondary Series: 278mA
• Frequency: 60Hz
• Output Current: 278mA
• Rohs Compliant: Yes
• Primary Voltages: 2 X 115V
• Mounting Type: PC Board
• Features: Low Profile
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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toroid’s compact dimensions. They are particularly well suited where
low height is a consideration.
low radiated magnetic fields. This makes the toroid ideal for applications
involving high sensitivity circuitry.
copper wire is wound over polyester film, forming a silent, stable unit
without the use of environmentally unfriendly glues or varnishes.
diameter of our toroids may be economically varied to accommodate
equipment design requirements.
form of a clock spring with the ends spot-welded in place. The
High Performance Products For Your High Performance Applications.
tied down to core caps or lamination sizes, the height and
FLEXIBLE DIMENSIONS
parts. Electrical and mechanical designers appreciate a
oriented electrical grade silicon steel tightly wound in the
uniformly around the entire core. As a result, toroids emit very
the flexibility to vary dimensions. Because AMVECO is not
Most toroids are smaller than their E-I transformer counter-
Toroids have no airgaps: primaries and secondaries are wound
The core of a toroid is formed from a single strip of grain-
Compounding the benefits of low weight and small size is
SMALL SIZE
LOW STRAY MAGNETIC FIELD
LOW MECHANICAL HUM
toroidal transformers. Of special importance are the following points:
On this page you can learn about the benefits of using AMVECO
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THE ADVANTAGES AND BENEFITS OF USING AMVECO TOROIDAL TRANSFORMERS
AMVECO’s transformers use only flame-retardent material (UL 94-V2)
AMVECO’s transformers are recognized to several UL standards and
certified by CSA as well as TUV for medical applications.
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AMVECO offers lifetime warranty for its products
AMVECO is an ISO 9001 registered company
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laminated transformers. Low weight simplifies end product design by
reducing mounting hardware and supporting enclosure requirements.
is in a “stand-by” mode for long periods, the potential cost reduction for
power can be significant, sometimes 80-90%.
about 30% of what it is at full load.
ated with conventional E-I-laminated transformers... and three screws are
eliminated at assembly!
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rule; the larger the transformer, the more efficient it becomes.
more iron. At half the load, the toroid’s temperature rise is only
avoiding costly mechanical design and practical problems associ-
15 and 30% more efficient than the conventional type. As a
the toroid cools off quicker than the conventional E-I type with
lighter, (depending on power rating), than conventional
extremely low no-load losses. In applications where a circuit
A single-center screw easily and quickly mounts the toroid,
Because they are more efficient, toroids can be up to 50%
LOW OPERATING TEMPERATURE
Compared to conventional E-I transformers, toroids exhibit
Due to its unique construction, toroids are typically between
Since most of the losses in a toroid are in the copperwire,
LOW WEIGHT
EASY TO MOUNT
LOW NO-LOAD LOSSES
HIGH EFFICIENCY