The TL Series consists of two models, 251TL and 351TL, both using linear technology. These units are ideal sources for special purpose AC power applications that require variable voltage and frequency at high frequencies and low noise and distortion levels. Both units provide single-phase output. With simple knobs used to set voltage, frequency and current limit, the TL Series provides an inexpensive source of low AC power. All TL Series power source models can be used in table-top mode or rack-mounted. Output Power The 351TL AC power source is rated for 350 VA with an output voltage between 90 % and 100 % of range and a load power factor of 0.7 to reflect typical operating conditions. Maximum RMS current is 2.8 A in the 135 V range. The 251TL is rated for 250 VA with an output voltage between 78 % and 100 % of range and a load power factor of 0.7. It's maximum current is 2.0 A in the 135 V range.