# BA Series Bender Actuators

The BA Series 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.

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### Specifications

 Order Code Deflection Force Dimensions Thickness Free Length Voltage AC Voltage Cap. Stiffness Res. Freq. Mass $AU Buy Now BA3502 0.6 mm 0.07 N 35×2.1 mm 0.6 mm 28 mm 0-150V +/-37 V 18nF 233 N/m 230Hz 0.23 g$AU17 Buy Now BA4902 1.3 mm 0.1 N 49×2.1 mm 0.75 mm 38 mm 0-200 V +/-50 V 20nF 154 N/m 140Hz 0.41 g $AU17 Buy Now BA6020 2.6 mm 0.5 N 60×20 mm 0.8 mm 53 mm 0-150 V +/-37 V 320nF 380 N/m 60Hz 5 g$AU61 Buy Now

### Electrical Connection

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

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.

### Mounting

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 the BA4902 and BA6020.

BA4902 Piezo Bender

### Electrical Current Requirements

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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: $$I_p = 2 \pi f V_{p-p}$$ 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

The recommended drivers and connection diagrams are listed below.

 Amplifier Application Configuration Voltage 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