Transducer vs Buzzer

A SMD Magnetic transducer differs from a buzzer. The difference comes that a transducer needs external drive circuit, while a buzzer has internal drive circuit inside. Usually engineers drive transducer with external PWM signal. But for those who can't use PWM, click here to download an input signal generator circuit with multi-vibrator for proper drive of transducer .
(BST-1295C is the only buzzer in above chart)

In case of the transducer, frequency in this chart means "rated frequency" at which the transducer has its maximum sound output. If applied frequency is lower/higher than the rated frequency, its sound will be smaller than one at 4k input.

In case of the buzzer with the internal circuit, frequency in this chart means "fixed output frequency" when DC input signal is applied.

If additional technical supports are required, please contact us.

How to get free samples?(한글)

Samples will be provided via one between following methods at free of charge;
- EMS prepaid(air express) which takes about 2~3 business days.
- Regular mail which takes less than a couple of weeks

To get these free samples, please contact our sample provider.(email : sp@bosanhitech.com)
Attaching below contents in your message will help us to expedite samples. .

1. Company name
2. Contact person's name
3. phone/fax/email/ship to address including zip code(important!)
4. Part number of samples to be required
5. Quantity(max. 10 pcs per a model, total 20 pcs max.)
6. Application/role of a buzzer in device.
7. Dispatch mode(EMS / mail)
8. Expected time for arrival(ETA) for samples
9. Request for Quotation(optional) with estimated annual usage.