High Active Stack (HAS) Piezo Actuators

TDK Corporation presents two piezo actuators made of RoHS-compatible lead zirconate titanate (PZT) with an internal copper electrode. The COM30S5 and COM45S5 are available as unhoused, passivated components. They are characterized by an extraordinary dynamic range, a high force-to-volume ratio, and precision in the nanometer range. TDK achieves this through its patented copper-based high active stack (HAS) technology. Compared to other technologies, HAS piezo actuators from TDK offer superior performance, robustness to moisture, and a longer lifetime.

The voltage range goes from -10 V to +180 V, their nominal stroke is reached at +160 V, and their allowed surface temperature ranges from -40°C to +160°C. With 30 mm and 45 mm heights, and with a cross-section of 5.2 mm x 5.2 mm, these actuators reach strokes of 55 µm and 83 µm correspondingly, at 160 V and 730 N of preload.

The COM10S5 features a 10 mm height and 16 µm of stroke. The COM27S3 (leaded) has a 27 mm height and 47 µm of stroke, and the COM30S7 has 30 mm of height and a 7 mm x 7 mm cross-section delivering 55 µm of stroke and 2,600 N of blocking force.