model No.	Fr(KHz)	Zr( Ω)	C(nF)	Dimension(mm)				Metal
				D	d	T	t
FT-9.9H-7.5A1	7.5±1.0	500	10nF±30%	9.9	7	0.12	0.05	A11oy
FT-10.5H-10.0A1	10.0±0.8	500	5.5nF±30%	10.5	8	0.17	0.05	A11oy
FF-11H-6.5A1	6.5±0.5	500	10nF±30%	11	8	0.12	0.05	A11oy
FT-11H-9.0A1	9.0±0.5	500	11nF±30%	11	8	0.17	0.1	A11oy
FT-11G-9.6A1	9.6±0.5	500	12nF±30%	11	8	0.17	0.1	S-steel
FT-11T-9.6A1	9.6±0.5	500	12nF±30%	11	8	0.17	0.1	Brass
FT-11T-10.0A1	10.0±0.9	300	9.5nF±30%	11	8	0.19	0.11	Brass
FT-12T-5.3A1	5.3±0.5	500	15nF±30%	12	9	0.12	0.05	Brass
FT-12H-5.5A1	5.5±0.5	500	13nF±30%	12	9	0.12	0.05	A11oy
FT-12H-6.0A1	6.0±0.5	500	13nF±30%	12	9	0.12	0.05	A11oy
FT-12T-6.0A1	6.0±0.5	500	17nF±30%	12	9	0.12	0.06	Brass
FT-12T-6.5A1	6.5±0.5	300	15nF±30%	12	9	0.15	0.09	Brass
FT-12T-8.0A1	8.0±0.5	300	15nF±30%	12	9	0.19	0.1	Brass
FT-12T-8.5A1	8.5±0.7	300	10nF_30%	12	9	0.2	0.08	Brass
FT-12T-9.0A1	9.0±0.5	300	12nF±30%	12	10	0.2	0.1	Brass
FT-12T-9.05A1	9.05±0.5	300	15nF±30%	12	9	0.22	0.1	Brass
FT-12.5T-8.5A1	8.5±0.5	300	11nF±30%	12.5	10	0.22	0.1	Brass
FT-13H-4.5A1	4.5±0.5	500	15nF±30%	13	9	0.12	0.05	A11oy
FT-13T-6.5A1	6.5±0.5	500	13nF±30%	13	9	0.18	0.1	Brass
FT-13.5T-7.0A1	7.0±0.5	300	12nF±30%	13.5	9	0.22	0.1	Brass
FT-14H-4.3A1	4.3±0.5	300	70nF±30%	14	12	0.12	0.05	A11oy
FT-15T-3.5A1	3.5±0.5	300	35nF±30%	15	12	0.12	0.05	Brass
FT-15H-4.2A1	4.2±0.5	500	34nF±30%	15	12	0.13	0.05	A11oy
FT-15H-4.6A1	4.6±0.5	500	20nF±30%	15	12	0.2	0.1	A11oy
FT-15T-4.5A1	4.5±0.5	300	12nF±30%	15	9	0.2	0.1	Brass
FT-15T-5.8A1	5.8±0.5	800	10nF±30%	15	9	0.21	0.09	Brass
FT-15T-6.0A1	6.0±0.5	300	15nF±30%	15	12	0.22	0.1	Brass
FF-15T-6.0A1	6.0±0.5	300	10nF±30%	15	11.3	0.22	0.1	Brass
FT-15T-6.0A1	6.0±0.5	300	11nF±30%	15	10	0.22	0.1	Brass
FT-15T-9.05A1	9.05±0.5	300	9nF±30%	15	10	0.32	0.12	Brass
FT-15T-10.0A1	10.0±0.5	300	9nF±30%	15	11.3	0.37	0.2	Brass
FT-17.2H-3.5A1	3.5±0.5	300	32nF±30%	17.2	13.4	0.18	0.1	A11oy
FT-18T-3.6A1	3.6±0.5	300	15nF±30%	18	12	0.2	0.08	Brass
FT-20H-2.0A1	2.0±0.5	300	70nF±30%	20	15	0.13	0.05	A11oy
FT-20T-2.5A1	2.5±0.5	300	70nF±30%	20	15	0.15	0.08	Brass
FT-20H-2.6A1	2.6±0.5	300	24nF±30%	20	15	0.15	0.05	A11oy
FF-20H-3.2A1	3.2±0.5	300	24nF±30%	20	15	0.2	0.1	A11oy
FT-20T-3.4A1	3.4±0.5	300	20nF±30%	20	15	0.22	0.1	Brass
FT-19.9T-3.6A1	3.6±0.5	300	20nF+30%	20	14	0.22	0.1	Brass
FT-20T-3.6A1	3.6±0.5	300	21nF±30%	20	15	0.22	0.1	Brass
FT-20T-3.8A1	3.8±0.5	300	19nF±30%	20	15	0.26	0.13	Brass
FT-20T-4.0A1	4.0±0.5	300	20nF±30%	20	15	0.22	0.14	Brass
FT-20T-4.0A1	4.0±0.5	300	26nF±30%	20	15	0.26	0.14	Brass
FT-20T-4.8A1	4.8±0.5	300	16nF±30%	20	15	0.3	0.15	Brass
FT-20T-5.5A1	5.5±0.5	300	15nF±30%	20	15	0.37	0.2	Brass
FT-20T-6.0A1	6.0±0.5	300	13nF±30%	20	15	0.42	0.2	Brass
FT-20T-6.5A1	6.5±0.5	300	15nF±30%	20	15	0.42	0.25	Brass
FT-20T-7.2A1	7.2±0.5	300	12nF±30%	20	15	0.47	0.25	Brass
FT-20G-7.5A1	7.5±0.5	300	12nF±30%	20	15	0.45	0.23	S-steel
FT-21T-4.5A1	4.5±0.5	300	18nF+30%	21	15	0.3	0.15	Brass
FT-22T-4.8A1	4.8±0.5	300	12nF±30%	22	16.8	0.37	0.15	Brass
FT-27T-2.0A1	2.0±0.5	300	50nF±30%	27	20	0.2	0.1	Brass
FT-27T-2.3A1	2.3±0.5	300	45nF±30%	27	20	0.22	0.1	Brass
FT-27T-2.5A1	2.5±0.5	300	45nF±30%	27	20	0.26	0.14	Brass
FT-27T-2.8A1	2.8±0.5	300	20nF±30%	27	20	0.32	0.1	Brass
FT-27T-3.5A1	3.5±0.5	300	30nF±30%	27	20	0.37	0.2	Brass
FT-27T-3.6A1	3.6±0.5	300	20nF±30%	27	20	0.42	0.2	Brass
FT-27G-3.6A1	3.6±0.5	300	20nF±30%	27	20	0.42	0.2	S-steel
FT-27T-4.0A1	4.0±0.5	300	23nF±30%	27	20	0.52	0.3	Brass
FT-27T-4.0A1	4.0±0.5	300	20nF±30%	27	20	0.47	0.25	Brass
FT-27T-4.6A1	4.6±0.5	300	20nF±30%	27	20	0.52	0.3	Brass
FT-27T-6.0A1	6.0±0.5	800	15nF±30%	27	25	0.65	0.2	Brass
FT-30T-0.9A1	0.9±0.5	300	49nF±30%	30	20	0.16	0.05	Brass
FT-31T-1.4A1	1.4±0.5	300	45nF±30%	31	20	0.22	0.1	Brass
FT-31T-1.4A1	1.4±0.5	300	70nFT30%	31	20	0.22	0.1	Brass
FT-31H-1.4A1	1.4±0.5	300	45nF±30%	31	20	0.22	0.1	A11oy
FT-31G-1.6A1	1.6±0.5	300	45nF±30%	31	20	0.22	0.1	S-steel
FT-32T-2.9A1	2.9±0.5	300	30nF±30%	32	25	0.42	0.2	Brass
FT-35T-1.8A1	1.8±0.5	300	70nF±30%	35	25	0.32	0.2	Brass
FT-35T-2.3A1	2.3±0.5	300	28nF±30%	35	25	0.42	0.2	Brass
FT-35T-2.6A1	2.6±0.5	300	28nF±30%	35	25	0.52	0.3	Brass
FT-41H-0.7A1	0.7±0.5	800	80nF±30%	41	25	0.22	0.1	A11oy
FT-41T-1.0A1	1.0±0.5	800	80nF±30%	41	25	0.22	0.1	Brass
FT-41T-1.2A1	1.2±0.5	800	75nF±30%	41	25	0.27	0.15	Brass
FT-43T-0.8A1	0.8±0.5	800	75nF±30%	43	25	0.22	0.1	Brass
FT-45T-0.7A1	0.7±0.5	300	80nF±30%	45	25	0.22	0.1	Brass
FT-50T-1.8Al	1.8±0.5	300	75nF±30%	50	25	0.22	0.1	Brass
FT-50T-2.1A1	2.1±0.5	300	75nF±30%	50	25	0.27	0.15	Brass
FT-50T-2.7A1	2.7±0.5	300	35nF±30%	50	25	0.42	0.2	Brass
FT-50T-3.0A1	3.0±0.5	300	28nF±30%	50	25	0.42	0.2	Brass
FT-55G-3.2A1	3.2±0.5	300	30nF±30%	55	25	0.42	0.2	S-steel
FT-70T-3.0A1	3.0±0.5	300	60nF±30%	70	50	0.63	0.2	Brass

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Company introduction and workshop photos

 

Changzhou Esuntech Co.,Ltd. is a commitment to high-quality locates in Jiangsu near Shanghai which is convenient for goods transportation and customer visiting. And we have Electromax Co as the agent  in Seoul Korea. Main Poducts: Buzzer: piezoelectric (piezo) vibration element, piezoelectric buzzer, magnetic buzzer, SMD buzzer Speaker: piezo tweeter, mylar speaker, loudspeaker, tweeter speaker, TV speaker, car speaker, multimedia speaker, woofer, sub-woofer, waterproof speaker etc Ultrasonic sensor: for car parking system or distance tester.

 

 

 

Company Advantages:

 

We have excellent engineer (including Korea engineer)and we are focus on product innovation , Management innovation.The quality of product was recognized by customer from all over the world.Our products are sold more than twenty countries and regions around the world.our products are widely recognized  by them.And we have long-team relationship with the client.

 

Marketing Countries:   

 

USA, Korea, Brazil, Canada, Russia, Turkey, Spain, Germany and so on.

 

Production Line

Inspection and quality control

Packgage,Warehouse & Delivery

 

Product introduction

Applications

 

· Medical

· Smart home

· Security

· consumer electronics, 

· household electronics

· industrial applications

 

Features:

•Piezo or eletro magnet

•Internally or external driven

•Terminals

        ○ Pins (red copper with tin plating)

        ○ Panel mount with lead wires

        ○ Screw terminals (brass with nickel plating)

Piezo Elements

The Piezo Element is the heart of a Piezo Buzzer. Also called Piezo Diaphragms and Piezo Benders, ceramic piezo plate essentially it is offered so that product manufacturers can produce sound within their own housing/enclosure designs. Esuntech has special expertise in piezo element production from very small units for sensors, to very large units for sirens. Specially formulated piezo ceramic discs are applied to a variety of base disc materials in order to suit most applications.

The basic element in all of these is a piezoelectric ceramic mounted on a metal diaphragm. When AC voltage is applied across the electrodes of the piezoelectric ceramic it expands and contracts at the frequency applied. This causes the piezo diaphragms to bend, producing sound waves. The metal diaphragm is usually brass, stainless steel or nickel alloy, thickness less than 0.5 mm. PZT ceramic material is used as the piezoelectric element. This element is designed so that the mechanical resonant frequency matches the frequency of the driving signal. By doping the PZT material, its piezoelectric characteristics can be modified: especially the hardness or softness of the material. The Esuntech piezo element provides performance in both sonic and ultrasonic applications and has found uses in applications beyond piezo buzzers for ultrasonic atomization, or as an impulser. Future directions include actuators and even piezo speakers.

Piezo Elements Sound Capabilities

The piezo disc is a low cost, low power consumption solution for creating good sound output at specific mid and high range frequencies. When combined with a plastic cone, or when layered in a bimorph configuration, the piezo disc can be a very powerful sound producer. We have additional information about the piezo element and piezo technology in our special Piezo Element Catalog, which can be found under the resources tab. 

Piezoelectric Sounders / Buzzers

Piezoelectric Sounders / Buzzers are sound components prepared by incorporating a piezoelectric vibration plate in a plastic case (resonator). Conventional rated voltages are 3V, 5V, 12V, 24V.

Piezoelectric sounders are sound components which generate sound suitable for use as input signals (including multi-tone, melody and so on) without built-in oscillation circuits.

This characteristic allows them to be used in a wide range of applications. They come as the SMD type, which is optimal for small, high-density mounting, and the pin type which can be used for general purposes.

Piezoelectric buzzers are sound components which generate a monotone using a built-in oscillation circuit. 

Pin type Piezoelectric Sounders

 

These products are optimized for operation confirmation sounds and warning sounds in household appliances such as air conditioners, washers and refrigerators.

A larger size is capable of generating higher sound pressure (louder sound).

SMD Piezoelectric Sounders

 

Smaller size,low current consumption, sound press level around 75dB - 85dB.

Optimized for small devices such as blood glucose meters, clinical thermometers, photoflashes for cameras, and portable terminals.

Electromagnetic buzzer and electromagnetic transducer

 

The electromagnetic buzzer is composed of an oscillator, an electromagnetic coil, a magnet, a vibrating diaphragm and a shell. After the power is turned on, the audio signal current generated by the oscillator passes through the electromagnetic coil, causing the electromagnetic coil to generate a magnetic field. The vibrating diaphragm periodically vibrates and produces sound under the interaction of the electromagnetic coil and the magnet. The electromagnetic transducer has the same working principle as the electromagnetic buzzer, but one less oscillating circuit.

 

The mechanical buzzer:

 

The mechanical buzzer uses a magnet to move a reed up and down quickly to emit a lower-pitch buzz. The sound pressure is lower than that of a piezoelectric buzzer. The usual working voltage is 1.2V 3V 6V 9V 12V 24V and the working frequency is 400 Hz. Widely used in doorbells and solar mouse repellers.

 

Services provided.

1. Free samples.

2.Products can be customized according to customer needs, and we have a strong R&D team.

3.The delivery time is stable. We have nearly 200 employees and a factory building of more than 10,000 square meters.

4.We promise that the quality of all products is equivalent to samples. A complete process system and quality inspection system can ensure fewer after-sales problems and reliable product quality. 

 

FAQ

1. How to choose piezoelectric sounders / buzzer?

First of all, we need to know whether we need piezoelectric sounders or piezoelectric buzzers. This is very simple. If the driving voltage is DC, choose piezoelectric buzzer, and if the driving voltage is AC, choose piezoelectric sounders.

Secondly, we need to know their rated voltage, resonant frequency, SPL... The most important thing is the product size you need. With these parameters, our sales can recommend products that meet your requirements.

2. Is it necessary to distinguish the positive and negative poles when installing the buzzer / sounders?

 

Of course it is necessary. When installing the buzzer / sounders with the + sign, be sure to connect the positive pole. If it is not installed in accordance with the signs, the buzzer may be directly damaged or the sound emitted may not meet the requirements.

 

3. Are they compliant with RoHS directive?

All Sound Components (Piezoelectric / Electromagnetic Sounders, Piezoelectric Diaphragms, Piezoelectric / Electromagnetic Buzzers) on our Website are compliant with  RoHS directive. 

4. I would like to know procurement lead time

Please contact us when you need the latest lead time information because it will be changed depend on the market condition.

5. What about the Minimum Order Quantity?

Please confirm with the sales before placing the order. If there are raw materials in stock, 1,000 pieces of a single variety are acceptable.

6.Can you provide samples?

Of course, we can provide 5 free samples, and the sample delivery time is 7-10 days.

 

Notice

① The products must not be washed.

② Storage Condition:

The products should be stored in the room,where the temperature/humidity is stable.

And avoid such places where there are large temperature changes.

Please store the products at the following conditions:

Temperature:-10 to +40℃ Humidity: 15 to 85% R.H.

③  Expire Date on Storage:

Expire date (shelf life) of the products is six months after delivered under the conditions of a sealed and an unopened package.

Please use the products with  six months  after delivered.

④ Notice on product Storage:

   Please use the products immediately after the package is opened, because the characteristics may be reduced at quality.