Audio Transformers

Audio Transformers are transformers designed to be used in the amplifiers and high-frequency audio and voice circuits, for coupling ad impendence matching applications. The transformers allow an AC input signal to produce a related AC output signal without the input and the output being physically connected together. This is accomplished by having two or more coils of insulated wire wound around a magnetic metal core. When the AC signal passes through the input winding, a related AC signal appears on the output winding via the inductive coupling.
Audio Transformers perform several functions:
• They can step up (increase) or step down (decrease) a signal voltage
• They can increase or decrease the impedance of circuit
• Convert the circuit from unbalanced to balanced and from balanced to unbalanced
• Block DC current in a circuit while allowing the AC current flow
• They electrically isolate one audio device from another

There are two main types of transformers:
• Step-up / Step-down transformers – The primary and the secondary coils have a different number of windings, that means they have different impedances. Different impedances cause the signal level changed as it goes through the transformer.
• 1:1 transformers – Each coil has exactly the same number of windings which makes the impedance identical. This transformer doesn’t change the signal level but guarantees the physical electrical insulation between coils. These transformers are usually called Isolation Transformers.

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Description Price Primary Impedance Secondary Impedance Primary DC Resistance Power Rating Current Rating Secondary DC Resistance Dimensions Mounting Type Termination Type Weight Depth Diameter Length Width
RS Stock No. 210-6380
Mfr. Part No.R/Z1606
BrandOEP
€13.07
Each
units
800Ω 800Ω 109Ω 2mW - 134Ω 18 x 12.7 x 18mm Through Hole - - 18mm - 18mm 12.7mm
RS Stock No. 667-6088
Mfr. Part No.Z218A6E
BrandOEP
€11.00
Each
units
600Ω - 46Ω - - 60Ω 21.5 x 16.3 x 18mm Through Hole - - 18mm - 21.5mm 16.3mm
RS Stock No. 168-3111
Mfr. Part No.749196218
€5.172
Each (On a Reel of 400)
units
- - 200mΩ - 800mA - 16.3 x 12 x 7.4mm Surface Mount Solder - 7.4mm - 16.3mm 12mm
RS Stock No. 168-3206
Mfr. Part No.749196517
€9.81
Each
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- - 36mΩ - 2.3A - 21.5 x 21 x 12mm Surface Mount Solder - 12mm - 21.5mm 21mm
RS Stock No. 123-7219
Mfr. Part No.Z1671E
BrandOEP
€6.90
Each
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50Ω 100Ω 10.3Ω 2mW - 21.4Ω 18 x 18 x 15mm Through Hole PC Pin 14g 15mm - 18mm 18mm
RS Stock No. 210-6431
Mfr. Part No.A262A6E
BrandOEP
€11.96
Each
units
150Ω 150Ω 15Ω 1mW Hz @ 30, 100mW Hz @ 300 - 20Ω 28 x 22 x 23mm Through Hole Pin - 23mm - 28mm 22mm
RS Stock No. 667-5962
Mfr. Part No.CN006
BrandOEP
€11.70
Each
units
- - - - - - 34.7 x 15.5 x 28.2mm - - - 28.2mm - 34.7mm 15.5mm
RS Stock No. 168-3205
Mfr. Part No.749196218
€8.07
Each
units
- - 200mΩ - 800mA - 16.3 x 12 x 7.4mm Surface Mount Solder - 7.4mm - 16.3mm 12mm
RS Stock No. 168-3121
Mfr. Part No.749196507
€7.76
Each (On a Reel of 120)
units
- - 36mΩ - 2.3A - 21.5 x 21 x 12mm Surface Mount Solder - 12mm - 21.5mm 21mm
RS Stock No. 168-3127
Mfr. Part No.749196528
€5.696
Each (On a Reel of 120)
units
- - 102mΩ - 1.35A - 21.5 x 21 x 12mm Surface Mount Solder - 12mm - 21.5mm 21mm
RS Stock No. 2508295029
Mfr. Part No.145B
BrandHammond
€24.91
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508972739
Mfr. Part No.TY-145P
€5.16
Each
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- - - - - - - - - - - - - -
RS Stock No. 2508972672
Mfr. Part No.SP-66
€17.41
Each
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- - - - - - - - - - - - - -
RS Stock No. 2508972701
Mfr. Part No.SP-70
€18.80
Each
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- - - - - - - - - - - - - -
RS Stock No. 2508972688
Mfr. Part No.SP-67
€18.80
Each
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