Through Hole Audio Transformer 1 + 1kΩ
- RS Stock No.:
- 123-7199
- Mfr. Part No.:
- A187A11C
- Brand:
- OEP
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Subtotal (1 unit)*
£52.86
(exc. VAT)
£63.43
(inc. VAT)
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In Stock
- 3 unit(s) ready to ship
- Plus 999,999,996 unit(s) shipping from 16 December 2025
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Units | Per unit |
|---|---|
| 1 - 9 | £52.86 |
| 10 + | £47.57 |
*price indicative
- RS Stock No.:
- 123-7199
- Mfr. Part No.:
- A187A11C
- Brand:
- OEP
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | OEP | |
| Primary Impedance | 577Ω | |
| Secondary Impedance | 1 + 1kΩ | |
| Primary DC Resistance | 49.8Ω | |
| Secondary DC Resistance | 48.5 (Secondary 1) Ω, 50 (Secondary 2) Ω | |
| 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 | |
| Minimum Operating Frequency | 15Hz | |
| Turns Ratio | 1:1:1 | |
| Maximum Temperature | +70°C | |
| Minimum Temperature | 0°C | |
| Maximum Operating Frequency | 50kHz | |
| Core Type | Laminated | |
| Construction | Enclosed | |
| Isolation Voltage | 250V | |
Select all | ||
|---|---|---|
Brand OEP | ||
Primary Impedance 577Ω | ||
Secondary Impedance 1 + 1kΩ | ||
Primary DC Resistance 49.8Ω | ||
Secondary DC Resistance 48.5 (Secondary 1) Ω, 50 (Secondary 2) Ω | ||
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 | ||
Minimum Operating Frequency 15Hz | ||
Turns Ratio 1:1:1 | ||
Maximum Temperature +70°C | ||
Minimum Temperature 0°C | ||
Maximum Operating Frequency 50kHz | ||
Core Type Laminated | ||
Construction Enclosed | ||
Isolation Voltage 250V | ||
- COO (Country of Origin):
- GB
OEP A187A11C Microphone Transformers
A187A11C microphone transformers from OEP are ideal for signal splitting and impedance matching. These audio transformers provide two isolated balance outputs when loaded with 1 kΩ. Constructed with multiple electrostatic screens, these dual output microphone transformers have excellent common mode rejection. They are encapsulated in a mumetal screening can.
Proof voltage of 250 Vrms from windings to screen and from primary to secondaries
2.85 H nominal inductance at 1 kHz, 0.1 V
Interwinding capacitance of 180 pF at 1 kHz for primary to screens
Interwinding capacitance of 71 pF for secondary 1 to screens
Interwinding capacitance of 113 pF for secondary 2 to screens
2.85 H nominal inductance at 1 kHz, 0.1 V
Interwinding capacitance of 180 pF at 1 kHz for primary to screens
Interwinding capacitance of 71 pF for secondary 1 to screens
Interwinding capacitance of 113 pF for secondary 2 to screens
Note
Do not pass DC through the windings