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Create Free Business AccountThe 109R is a miniature epoxy potted audio transformer from the 2 W-rated 109 Series, built for printed circuit board mounting. It couples a 10K ohm center-tapped primary to a 1.5K ohm center-tapped secondary with a 5.16:1 turns ratio, for matching a high-impedance stage into a 1.5K ohm load. Designers of audio input, line matching, isolation and output stages will find it a compact, board-level way to add transformer coupling.
Nominal impedances are 10K ohm CT on the primary (pins 1-3) and 1.5K ohm CT on the secondary (pins 4-6). The ordering table lists D.C. resistance of 700 ohms primary and 150 ohms secondary (+/- 20%) and a maximum D.C. unbalance of 1.5 mA. The part drawing gives typical values of 384 Ω (234Ω/150Ω) primary DCR, 5.57 H primary and 0.93 H secondary inductance, 14.00 mH leakage inductance, a 5.16:1 turns ratio and 100 Vrms dielectric strength.
The series is rated 2 watt (+/- 1.5 db, 300Hz. - 50 KHz.), and the 109R drawing lists a power level of 2.0W from 300 Hz to 50 kHz with typical output power of 2 W. Frequency range is 300 Hz to 50 kHz +/- 1.5 dB at +0 dBm and 300 Hz to 50 kHz +/- 1.5 dB at +27 dBm, measured with no D.C. saturation. Power ratings are maximum at the lowest frequency, and the secondary may be used as the primary and vice versa.
Construction is rugged epoxy potting in a black molded case, producing a completely sealed unit, with pin type P.C. board terminals of at least 0.187" length. The part withstands soldering for 10 seconds at 260 °C, is rated for 85 °C maximum ambient, and the casting epoxy has a workable range of -40 °C to +105 °C. It is RoHS and REACH compliant, made in Canada, and ships at 0.1 lbs (0.05 kg).
| Series | 109 Series – 2W Audio Miniature Epoxy Potted |
| Description | Audio transformer, potted, primary 10K ct ohms, secondary 1.5K ct ohms |
| Product Type | Audio transformer, potted |
| Short Description | AUDIO TX POTTED |
| Applications (Series) | Audio input, line matching, isolation or output transformer applications |
| Turns Ratio | 5.16:1 |
| Winding Use | Secondary may be used as primary and primary as secondary |
| Leakage Inductance | 14.00 mH |
| Dielectric Strength | 100 Vrms |
| Max. D.C. Unbalance | 1.5 mA |
| Series Power Rating | 2 watt (+/- 1.5 db, 300Hz. - 50 KHz.) |
| Output Power (Typical) | 2 Watts |
| Frequency Range @ +0 DBm | 300 Hz to 50 kHz +/- 1.5 dB |
| DCR Primary 1-3 (Typical) | 384 Ω (234Ω/150Ω) |
| Frequency Range @ +10 DBm | 300 Hz to 50 kHz +/- 1.5 dB |
| Frequency Range @ +27 DBm | 300 Hz to 50 kHz +/- 1.5 dB |
| Input Impedance (Typical) | 10 KΩCT |
| Power Level Note (Series) | Power level ratings are maximum at lowest frequency rating; power can be increased slightly at higher frequencies |
| Output Impedance (Typical) | 1.5 KΩCT |
| Power Level (Part Drawing) | 2.0W @ 300 Hz to 50 kHz |
| DCR Secondary 4-6 (Typical) | 58 Ω (29Ω/29Ω) |
| Frequency Response (Typical) | ±1.5 dB from 300 Hz to 50 kHz |
| Unbalanced DC (Part Drawing) | 0.75mA Max. |
| Frequency Measurement Condition | No D.C. saturation |
| Primary Impedance (300 Hz, 1.0 V OC) | 11.01 KΩ |
| Primary Nominal Impedance (Pins 1-3) | 10K ct ohms |
| Primary Inductance (300 Hz, 1.0 V OC) | 5.57 H |
| Secondary Impedance (300 Hz, 1.0 V OC) | 1.83 KΩ |
| Secondary Nominal Impedance (Pins 4-6) | 1.5K ct ohms |
| Secondary Inductance (300 Hz, 1.0 V OC) | 0.93 H |
| Primary D.C. Resistance (Pins 1-3), +/- 20% | 700 ohms |
| Secondary D.C. Resistance (Pins 4-6), +/- 20% | 150 ohms |
| UPC | 623980185903 |
| UNSPSC | 39121301 |
| Country Of Origin | Canada (Made in Canada) |
| Shipping Weight | 0.1 lbs (0.05 kg) |
| Mounting | Pin type P.C. board mount (min. 0.187" pin length) |
| Construction | Epoxy potted in a black molded case (rugged, completely sealed unit) |
| Pin 5 Note (Series) | In some models where no center tap is required on the secondary, pin No. 5 is omitted |
| Temperature Range | -40 to 105 °C (workable range of the casting epoxy under a normal rate of change; does not include thermal shock) |
| Ambient Temperature | 85 °C max. |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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The 109R has a 10K ohm CT primary on pins 1-3 and a 1.5K ohm CT secondary on pins 4-6.
The 109 Series is rated 2 watt (+/- 1.5 db, 300Hz. - 50 KHz.). The 109R drawing lists a power level of 2.0W @ 300 Hz to 50 kHz and typical output power of 2 Watts. Ratings are maximum at the lowest frequency; power can be increased slightly at higher frequencies.
It is a pin type P.C. board mount part with pins of at least 0.187" length, epoxy potted in a black molded case.
It will withstand soldering for 10 seconds at 260 °C, with an ambient temperature of 85 °C maximum. The casting epoxy has a workable temperature range of -40 °C to +105 °C under a normal rate of change, not including thermal shock.
The ordering table lists a maximum D.C. unbalance of 1.5 mA; the part drawing lists unbalanced DC of 0.75mA Max..
Yes. The 109R drawing states the secondary may be used as primary and primary as secondary.
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