Through Hole Audio Transformer 1 + 1kΩ

  • RS Stock No. 123-7198
  • Mfr. Part No. A187A10C
  • Brand OEP
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): GB
Product Details

OEP A187A10C Audio Input Transformers

A187A10C audio input transformers from OEP have multiple electrostatic and magnetic shields and provide galvanic isolation. The A187A10C transformer is a high ratio step down transformer featuring Faraday shielding that reduces hum and stray magnetic interference.

+21.5dbu maximum input level at 20 Hz with >1% distortion
250 Vrms proof voltage from winding to winding and screens to winding
155 mH primary leakage inductance at 1 kHz
42 pF interwinding capacitance at 1 kHz for primary to secondary 1
63 pF interwinding capacitance at 1 kHz for primary to secondary 2
39 pF interwinding capacitance at 1 kHz for primary to shield

Product Application Information

These audio input transformers are suitable for long cable runs without HF loss. They can be used for coupling instrument pickups to low impedance microphone inputs and unbalanced line level to balanced microphone outputs.


Do not pass DC through the windings.

Attribute Value
Primary Impedance 140kΩ
Secondary Impedance 1 + 1kΩ
Primary DC Resistance 3.2kΩ
Secondary DC Resistance 314Ω
Dimensions 29.4 x 25 x 24.2mm
Mounting Type Through Hole
Termination Type PC Pin
Weight 56g
Depth 24.2mm
Length 29.4mm
Width 25mm
Turns Ratio 11.5:1+1
Minimum Operating Frequency 10Hz
Minimum Temperature 0°C
Isolation Voltage 250V
Maximum Temperature +70°C
Construction Enclosed
Maximum Operating Frequency 25kHz
Core Type Laminated
5 In stock - FREE next working day delivery available
Price Each
£ 27.80
(exc. VAT)
£ 33.36
(inc. VAT)
Per unit
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