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. 168-3232
Mfr. Part No.749196548
MYR47.44
Each
units
- - 102mΩ - 1.35A - 21.5 x 21 x 12mm Surface Mount Solder - 12mm - 21.5mm 21mm
RS Stock No. 168-3109
Mfr. Part No.749196148
MYR23.80
Each (On a Reel of 500)
units
- - 344mΩ - 500mA - 12.9 x 9.2 x 6.2mm Surface Mount Solder - 6.2mm - 12.9mm 9.2mm
RS Stock No. 168-3329
Mfr. Part No.749196528
MYR47.44
Each
units
- - 102mΩ - 1.35A - 21.5 x 21 x 12mm Surface Mount Solder - 12mm - 21.5mm 21mm
RS Stock No. 168-3218
Mfr. Part No.749196228
MYR37.51
Each
units
- - 200mΩ - 800mA - 16.3 x 12 x 7.4mm Surface Mount Solder - 7.4mm - 16.3mm 12mm
RS Stock No. 168-3110
Mfr. Part No.749196208
MYR24.99
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. 168-3114
Mfr. Part No.749196248
MYR24.99
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. 168-3108
Mfr. Part No.749196138
MYR23.80
Each (On a Reel of 500)
units
- - 344mΩ - 500mA - 12.9 x 9.2 x 6.2mm Surface Mount Solder - 6.2mm - 12.9mm 9.2mm
RS Stock No. 168-3107
Mfr. Part No.749196128
MYR23.80
Each (On a Reel of 500)
units
- - 344mΩ - 500mA - 12.9 x 9.2 x 6.2mm Surface Mount Solder - 6.2mm - 12.9mm 9.2mm
RS Stock No. 168-3193
Mfr. Part No.749196508
MYR47.44
Each
units
- - 102mΩ - 1.35A - 21.5 x 21 x 12mm Surface Mount Solder - 12mm - 21.5mm 21mm
RS Stock No. 168-3257
Mfr. Part No.749196308
MYR37.01
Each
units
- - 145mΩ - 830mA - 17.5 x 16 x 9mm Surface Mount Solder - 9mm - 17.5mm 16mm
RS Stock No. 168-3211
Mfr. Part No.749196538
MYR47.44
Each
units
- - 102mΩ - 1.35A - 21.5 x 21 x 12mm Surface Mount Solder - 12mm - 21.5mm 21mm
RS Stock No. 168-3106
Mfr. Part No.749196118
MYR23.80
Each (On a Reel of 500)
units
- - 344mΩ - 500mA - 12.9 x 9.2 x 6.2mm Surface Mount Solder - 6.2mm - 12.9mm 9.2mm
RS Stock No. 168-3313
Mfr. Part No.749196348
MYR37.01
Each
units
- - 145mΩ - 830mA - 17.5 x 16 x 9mm Surface Mount Solder - 9mm - 17.5mm 16mm
RS Stock No. 168-3267
Mfr. Part No.749196318
MYR37.01
Each
units
- - 145mΩ - 830mA - 17.5 x 16 x 9mm Surface Mount Solder - 9mm - 17.5mm 16mm
RS Stock No. 168-3326
Mfr. Part No.749196507
MYR47.44
Each
units
- - 36mΩ - 2.3A - 21.5 x 21 x 12mm Surface Mount Solder - 12mm - 21.5mm 21mm
RS Stock No. 168-3131
Mfr. Part No.749196548
MYR34.925
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. 168-3310
Mfr. Part No.749196138
MYR35.71
Each
units
- - 344mΩ - 500mA - 12.9 x 9.2 x 6.2mm Surface Mount Solder - 6.2mm - 12.9mm 9.2mm
RS Stock No. 168-3128
Mfr. Part No.749196537
MYR34.925
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. 168-3125
Mfr. Part No.749196518
MYR34.925
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. 168-3104
Mfr. Part No.749010310
MYR12.43
Each (On a Reel of 800)
units
- - - - - - 12.7 x 8.67 x 4mm Surface Mount Solder - 4mm - 12.7mm 8.67mm