Piezo Bender Actuators

The BA family of bender actuators are piezoelectric bimorph actuators 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.

  • Enquiry

    • This field is for validation purposes and should be left unchanged.

  • Obtain instant quote

    • Click Buy Now
    • Select desired options
    • Add to cart
    • Proceed to checkout
    • Enter details
    • Download instant quote
BA6020 Piezo Bimorph BA Series Bender Actuators


Deflection Force Dimensions Thickness Free
Voltage AC
Stiffness Res.
Mass $USD Buy
BA3502 0.7 mm 0.08 N 35 x 2.5 mm 0.8 mm 28 mm +150 V +/-90 V 20nF 220 N/m 230Hz 0.3 g $5 Buy Now
BA4902 1.3 mm 0.07 N 49 x 2.1 mm 0.8 mm 42 mm +150 V +/-90 V 28nF 100 N/m 140Hz 0.4 g $6 Buy Now
BA4010 1.1 mm 0.18 N 40 x 10 mm 0.8 mm 33 mm +150 V +/-90 V 100nF 327 N/m 250Hz 1.7 g $16 Buy Now
BA5010 1.5 mm 0.3 N 50 x 10 mm 0.8 mm 43 mm +150 V +/-90 V 125nF 400 N/m 200Hz 2.1 g $18 Buy Now
BA6020 2.6 mm 0.3 N 60 x 20 mm 0.8 mm 53 mm +150 V +/-90 V 300nF 230 N/m 60Hz 5 g $30 Buy Now


  1. Capacitance of both sides in parallel. This value should be used for calculating the required current in the three-wire or parallel configuration. Tolerance is +/-30%

Electrical Connection

The three wire configuration requires a +150V amplifier with a +150V bias supply.

The recommended driver is a BD150 Module. The +150V bias voltage is achieved by configuring channel 2 in inverting mode and grounding the input. A 0V to +3V input is applied to input 1 to control the bender.

A zero volt input results in +150V across the top piezo layer and maximum upward deflection. A +3V input results in +150V across the bottom piezo layer and maximum downward deflection. The deflection δ can be represented by
$$\delta = \frac{V_{in} – 1.5}{3}\delta_{pp}$$

where $\delta_{pp}$ is the peak-to-peak displacement of the bender, and $V_{in}$ has the range 0V to 3V.

Wires can be attached using conductive epoxy (Circuitworks CW2400) or standard solder and Rosin flux. After flux application, a one second contact with a 300C iron is recommended. The positive terminal is indicated by a red stripe.


Bimorph actuators can be mounted with a soft clamp or bonded to a base using an adhesive such as Araldite. The longest life time is achieved when soft materials such as rubber are used at the clamping surface. The recommended clamping length is 2mm for for the BA3502 and 5mm for other sizes.


The expected lifetime for a 10% failure rate is 500,000 cycles with full-range deflection. The load force and deflection must be kept within specifications.

Electrical Current Requirements

Power Bandwidth Calculator

The required current is \( I = C \frac{dV}{dt} \) 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: $$ I_p = \pi C f  V_{p-p} $$ where \( V_{p-p} \) is the peak-to-peak voltage. For a triangle wave, the required peak current is equal to: $$ I_p = 2 C f V_{p-p} $$.

Recommended Drivers

Other recommended drivers are listed below.

Amplifier Application Configuration Voltage
BD150 General purpose Three or two wire +150V
PD32-V0,140 Multi-channel Two or three wire +140V
PDu100B General purpose Two wire Up to +/-100V
PDu100 Miniature Two wire Up to +/-100V

Options / OEM Customization

  • Custom range and dimensions
  • Custom wiring arrangement / connectors