Hammond 108H 600 Ohm CT 1:1 Line Isolation Transformer, 500 mW

The 108H is the 600 ohm 1:1 model of the 108 Series, with 600 ohm centre-tapped windings on the primary (pins 1-3) and secondary (pins 4-6). The matched windings make it a candidate for 600 ohm line isolation and line matching, alongside the audio input and output uses the series lists.

Typical output power is 0.500 Watts, while the part drawing states a power level of 150mw from 300 Hz. to 50 Khz. At +0, +10 and +20 dbm the frequency range is 300 Hz. to 50 Khz. +/- 1.5db with no D.C. saturation, and the frequency response is ±1.5db from 300Hz to 50KHz. Typical DCR is 50 ohms primary (20/30 ohms) and 50 ohms secondary (24/26 ohms); the ordering table gives 65 and 69 ohms (+/- 20%). Both windings measure 0.80 H and 3.90 K ohms at 1.0 kHz, 1.0 V, and leakage inductance is 3.00 mH. Unbalanced DC is 6mA max.; dielectric strength is 100 Vrms.

Like the rest of the 108 Series, it is epoxy potted in an attractive black molded case that forms a completely sealed unit able to withstand severe environmental conditions. It withstands soldering for 10 sec. at 260 degrees C with ambient temperature 85 degrees C max., and the casting epoxy is workable from -40°C to +105°C under a normal rate of change (thermal shock excluded). The drawing notes either winding may be used as the primary.

It mounts on a PC board with pin-type terminals of min. 0.187" length, is RoHS and REACH compliant, and has a shipping weight of 0.08 lbs (0.04 kg).