Micromechatronics, Inc. (MMech)

www.mmech.com - Ph: 814-861-5688

BA4902/BA3502/BA6020 Insulated Bender

Piezoelectric Insulated Bending Actuators


pdf-icon_sm BA4902/BA3502 Specifications


Part Number BA4902 BA3502 BA4010 BA6020
Dimensions 49 x 2.1 mm 35 x 2.5 mm 40 x 10 mm 60 x 20 mm
Deflection +/- 0.65 mm +/- 0.35 mm +/- 0.55 mm +/- 1.3 mm
Force 0.07N 0.08N 0.4N 0.3N
DC Voltage 0 to 150V 0 to 150V 0 to 150V 0 to 150V
AC Voltage +/- 37V +/- 37V +/- 37V +/- 37V
Thickness 0.80 mm 0.80 mm 0.80 mm 0.80 mm
Capacitance 20 nF 18 nF 110 nF 320 nF
Stiffness 100N/m 220N/m 720N/m 230N/m
Resonance Freq 140 Hz 230 Hz 250 Hz 60 Hz
Mass 0.4g 0.3g 1.7g 5.0g
Free Length 42 mm 28 mm 33 mm 53 mm


The BA4902 is a piezoelectric bimorph actuator poled in the parallel configuration. An insulated resin coating is applied to the external surfaces to protect the actuator and to eliminate electrical faults. The actuators can be wired in a three-wire or two-wire configuration as illustrated below.


Electrical Connections

The three wire configuration requires a single +200V supply; however, a bipolar configuration with a +/-100V supply is electrically equivalent. In the two-wire configuration, the maximum deflection and force is reduced by 30%.

Mounting Considerations

Bimorph actuators can be mounted with a clamp or bonded to a base using an adhesive such as Araldite. Wires are soldered to the electrodes with a one second contact at 300 degrees C. The use of a rosin flux will improve the bond. The positive terminal is indicated by a red stripe.

Electrical Current Requirements

The required current is I=C dV/dt, where I is the current, C is the effective capacitance, and dV/dt is the voltage rate-of-change. For a sine-wave, the required peak current is equal to:


Where Vp-p is the peak-to-peak voltage. For a triangle wave, the required peak current is:


Recommended Drivers

The recommended drivers and connection diagrams are listed below.

PDu100b General Purpose Two Wire +/-50V
PDu100 Miniature Two Wire +/-50V
PDm200B High Performance Two or Three Wire +200V or +/-50V



Options/OEM Customization

    • Custom range and dimensions
    • Custom wiring arrangement/connectors
    • Wires Attachment



More Information

101 Innovation Blvd. Suite 308
State College, PA 16803, USA
Ph: (814)-861-5688
Fax: (814)-861-1418