600:1500 Ohm Epoxy Potted PCB Input Transformer

The 102D is a miniature input audio transformer from the 102 Series that matches a 600 ohm primary to a 1500 ohm secondary. Board designers use it to bring a standard 600 ohm line into a higher-impedance input on a printed circuit board.

It is sealed in rugged black epoxy, giving a completely sealed unit, and mounts on the board with square pins that are 0.025 in square typical. Where a connection is not used, no pin exists. The 102D corresponds to drawing figure 1, the same outline as the 102B.

Performance ratings for the 102D:

• Output: 20 mW
• Insertion loss: 1.5 dB
• Low frequency roll-off: 310 Hz at -1 dB
• DC resistance: 43 ohms primary, 85 ohms secondary, +/- 15%
• Maximum primary DC: 0 mA
• Peak working voltage: 100 V

The maximum primary DC rating is 0 mA, so the primary is not rated to carry DC. This part is RoHS and REACH compliant and has a shipping weight of 0.02 lbs (0.01 kg). The series literature refers buyers wanting a more economical open-type P.C. mount part to the 148 and 149 series.