What are Audio Transformers ?
Audio Transformers are specialized components designed to transfer audio signals between different circuits while minimizing signal loss and distortion. They are commonly used in applications such as production electronics assembly and maintenance. Important specifications for selection include Frequency Range, which affects the audio quality; Impedance, which ensures compatibility with other components; and DC Resistance (DCR), which influences power efficiency. Validating these specifications is crucial for ensuring optimal performance in audio applications.
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| Part & Mfr | Approval Agency | DC Resistance (DCR) | Frequency Range | Frequency Response | Height | Impedance | Insertion Loss | Mounting Type | Operating Temperature | Power Level | Return Loss | Size | Termination Style | Transformer Type | Turns Ratio | Voltage | |||
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CSA-C22.2 No. 66-M1988, UL1459 | 95Ohm | 300Hz ~ 3.5kHz | ±0.5dB | 0.626" (15.90mm) | 600 | 2.2dB Max @ 1kHz | Through Hole | - | -45dB ~ 7dB | 14dB Typ | 1.272" L x 1.299" W (32.30mm x 33.00mm) | PC Pin | - | 1:1 | 1500VRMS @ 1 Minute | |
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- | - | - | - | - | 600 | 2.5dB Typ | Through Hole | - | - | - | - | - | Data/Voice Coupling | - | - | |
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- | 74Ohm | 300Hz ~ 3.5kHz | ±0.7dB | 0.657" (16.70mm) | 600 | 1.1dB Typ @ 1kHz | Through Hole | - | -45dB ~ 7dB | 18dB Typ | 1.650" L x 1.370" W (41.90mm x 34.80mm) | PC Pin | - | 1:0.5 | 1500VRMS @ 1 Minute | |
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- | 33Ohm | 300Hz ~ 3.5kHz | ±0.5dB | - | 600 | 1.4dB Max @ 1kHz | - | - | -45dB ~ 7dB | 26dB Min | - | - | - | 1:1 | 4000VRMS @ 1 Minute | |
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UL1950 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1:1 | 1500VRMS @ 1 Minute | |
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- | - | - | - | - | - | - | - | - | - | - | - | - | - | 1:1 | 500VRMS @ 1 Minute | |
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- | - | - | - | - | - | -3.5dB Max @ 6-9MHz | - | -40°C ~ 85°C | - | -12dB Min @ 6-9MHz | - | - | - | - | 1500VRMS @ 1 Minute | |
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- | 75Ohm | 300Hz ~ 3.5kHz | ±0.5dB | - | 600 | 1.7dB Max @ 1kHz | - | - | -45dB ~ 10dB | 14dB Min @ 1kHz | - | - | - | 0.659:1 | 1500VRMS @ 1 Minute | |
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UL1950, UL60950, EN60950 | 150Ohm | 200Hz ~ 4kHz | ±0.25dB | 0.543" (13.80mm) | 600 | 3.25dB Max @ 1kHz | Through Hole | - | - | 20dB Min @ 1kHz | 0.886" L x 0.909" W (22.50mm x 23.10mm) | PC Pin | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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- | - | - | - | 0.543" (13.80mm) | 600 | 2.5dB | Through Hole | - | - | - | 0.929" L x 0.976" W (23.60mm x 24.80mm) | PC Pin | - | - | - | |
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- | - | - | - | 0.543" (13.80mm) | 600 | 1dB Typ | Through Hole | - | - | - | 0.929" L x 0.976" W (23.60mm x 24.80mm) | PC Pin | - | - | - | |
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UL1950, UL60950, EN60950 | 108Ohm | 200Hz ~ 4kHz | ±0.2dB | 0.543" (13.80mm) | 600 | 2.5dB Max @ 1kHz | Through Hole | - | - | 25dB Min @ 1kHz | 0.886" L x 0.909" W (22.50mm x 23.10mm) | PC Pin | - | 1:1 | 1875VRMS @ 1 Second | |
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UL1950, UL60950, EN60950 | 46Ohm | 200Hz ~ 4kHz | ±0.25dB | 0.543" (13.80mm) | 600 | 1dB Max @ 1kHz | Through Hole | - | - | 20dB Min @ 1kHz | 0.886" L x 0.909" W (22.50mm x 23.10mm) | PC Pin | - | 1:1 | 1875VRMS @ 1 Second | |
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- | - | - | - | 0.543" (13.80mm) | 600 | 1dB Typ | Through Hole | - | - | - | 0.929" L x 0.976" W (23.60mm x 24.80mm) | PC Pin | - | - | - | |
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UL1950, UL60950, EN60950 | 25Ohm | 200Hz ~ 4kHz | ±0.5dB | 0.543" (13.80mm) | 600 | 0.75dB Max @ 1kHz | Through Hole | - | - | 20dB Min @ 1kHz | 0.886" L x 0.909" W (22.50mm x 23.10mm) | PC Pin | - | 1:1 | 1875VRMS @ 1 Second | |
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CSA-C22.2 No. 950-95, UL1950 | 170Ohm | 200Hz ~ 4kHz | ±2.5dB | 0.543" (13.80mm) | 600 | 4dB Max @ 1kHz | Through Hole | - | - | 8dB Min @ 200Hz ~ 4kHz | 0.886" L x 0.909" W (22.50mm x 23.10mm) | PC Pin | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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UL1950, UL60950 | 115Ohm | 200Hz ~ 4kHz | ±0.25dB | 0.409" (10.40mm) | 600 | 3.2dB Max @ 1kHz | Surface Mount | - | - | 18dB Min @ 200Hz ~ 4kHz | 0.532" L x 0.551" W (13.50mm x 14.00mm) | Gull Wing | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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UL1950, UL60950 | 94Ohm | 200Hz ~ 4kHz | ±0.25dB | 0.409" (10.40mm) | 600 | 2.2dB Max @ 1kHz | Surface Mount | - | - | 20dB Min @ 200Hz ~ 4kHz | 0.532" L x 0.551" W (13.50mm x 14.00mm) | Gull Wing | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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UL1950, UL60950 | 63Ohm | 200Hz ~ 4kHz | ±0.25dB | 0.409" (10.40mm) | 600 | 1.6dB Max @ 1kHz | Surface Mount | - | - | 20dB Min @ 200Hz ~ 4kHz | 0.532" L x 0.551" W (13.50mm x 14.00mm) | Gull Wing | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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UL1950, UL60950 | 150Ohm | 300Hz ~ 3.5kHz | ±0.2dB | 0.193" (4.90mm) | 600 | 3.8dB Max @ 1kHz | Surface Mount | - | - | 25dB Min @ 300Hz ~ 3.5kHz | 0.390" L x 0.701" W (9.90mm x 17.80mm) | Gull Wing | - | 1:1 | 1875VRMS @ 1 Second | |
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UL1950, UL60950, EN60950 | 58Ohm | 300Hz ~ 3.5kHz | ±0.3dB ~ ±0.5dB | 0.181" (4.60mm) | 600 | 1.25dB @ 1kHz | Surface Mount | -10°C ~ 60°C | 3.5dB | 16dB Min @ 300Hz ~ 3.5kHz | 0.390" L x 0.665" W (9.90mm x 17.80mm) | Gull Wing | - | 1:1 | 1875VRMS @ 1 Second | |
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- | - | - | - | 0.543" (13.80mm) | 600 | 3.75dB | Through Hole | - | - | - | 0.929" L x 0.976" W (23.60mm x 24.80mm) | PC Pin | Data/Voice Coupling | - | - | |
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UL1950, UL60950, EN60950 | 155Ohm | 200Hz ~ 4kHz | ±0.25dB | 0.200" (5.08mm) | 600 | 3.85dB Max @ 1kHz | Surface Mount | - | - | 20dB Min @ 200Hz ~ 4kHz | 0.335" L x 0.642" W (8.50mm x 16.30mm) | Gull Wing | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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UL1950, UL60950 | 23.8Ohm | 300Hz ~ 3.5kHz | ±0.3dB | 0.409" (10.40mm) | 600 | 1.5dB Max @ 1kHz | Surface Mount | - | - | - | 0.532" L x 0.551" W (13.50mm x 14.00mm) | Gull Wing | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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UL60950, EN60950 | 485Ohm | - | - | 0.299" (7.60mm) | 10k | - | Surface Mount | -20°C ~ 85°C | - | - | 0.378" L x 0.492" W (9.60mm x 12.50mm) | Flat Lead | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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UL60950, EN60950 | 90Ohm | 200Hz ~ 4kHz | ±0.4dB | 0.299" (7.60mm) | 600 | 2dB Max @ 2kHz | Surface Mount | -20°C ~ 85°C | - | 18dB Min @ 200Hz ~ 4kHz | 0.378" L x 0.492" W (9.60mm x 12.50mm) | Flat Lead | Data/Voice Coupling | 1:1 | 1875VRMS @ 1 Second | |
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- | 55Ohm | - | - | 0.485" (12.32mm) | 600 | 1dB @ 200Hz, 1dB @ 1kHz, 1dB @ 20kHz, 1.9dB @ 100kHz | Surface Mount | - | - | 20dB @ 200Hz, 30dB @ 1kHz, 25dB @ 10kHz | 0.530" L x 0.516" W (13.46mm x 13.11mm) | Gull Wing | General Purpose | 1:1 | 1500Vrms | |
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- | 55Ohm | - | - | 0.485" (12.32mm) | 600 | 1.2dB @ 200Hz, 1dB @ 1kHz, 1dB @ 20kHz, 1.7dB @ 100kHz | Surface Mount | - | - | 18dB @ 200Hz, 18dB @ 1kHz, 18dB @ 10kHz | 0.530" L x 0.516" W (13.46mm x 13.11mm) | Gull Wing | Data/Voice Coupling | 1:2 | 1500Vrms | |
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- | 55Ohm | - | - | 0.485" (12.32mm) | 600 | 1.2dB @ 200Hz, 1dB @ 1kHz, 1dB @ 20kHz, 1.7dB @ 100kHz | Surface Mount | - | - | 18dB @ 200Hz, 18dB @ 1kHz, 18dB @ 10kHz | 0.530" L x 0.516" W (13.46mm x 13.11mm) | Gull Wing | Data/Voice Coupling | 1:2 | 1500Vrms | |
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CSA, UR | 47Ohm | 300Hz ~ 3.5kHz | ±0.5dB | - | 600 | - | Through Hole | - | -45dB ~ 7dB | 26dB | - | PC Pin | Data/Voice Coupling | - | - | |
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CSA, UR | 49Ohm | 660Hz ~ 3.5kHz | -1.8dB ~ 0.5dB | 0.350" (8.89mm) | 600 | - | Through Hole | - | -45dB ~ 7dB | - | - | PC Pin | Impedance Matching | 1:1 | - | |
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- | - | 300Hz ~ 3.4kHz | - | 0.490" (12.45mm) | 600 | - | Through Hole | - | -45dB ~ 10dB | - | - | PC Pin | Impedance Matching | 1:1.1 | - | |
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