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You are here: Home / Buzzer / Passive SMD Magnetic Buzzer Series / KLJ-4020 SMD Magnetic Buzzer

KLJ-4020 SMD Magnetic Buzzer

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Mini type smart electronic devices, such as wearable smart devices, artificial intelligence devices and more.
  • KLJ-4020

Product Description


Technical Parameters KLJ-4020 SMD   Magnetic Buzzer
Oscillation   Frequency(Hz) 4000
Operating   Voltage(Vp-p) 2.0-4.0
Rated   Voltage(Vp-p) 3
Current   Consumption(mA/max) 110 at Rated Voltage
Sound   Pressure Level(dB/min) 73 at 10cm at Rated Voltage
Coil   Resistance(Ω) 12±2
Operating Temperature(℃ -20~ +85
Storage   Temperature(℃ -30 ~ +85
Environment   Compulsory Standard ROHS
PS:   Vp-p=1/2duty, square wave
Audible   distance at rated vol. 0.5-1m
Application Mini type smart   electronic devices, such as wearable smart devices, artificial intelligence   devices and more. 


指尖4020 (2)_750x.jpg

Product Introduction


Main Products: 

Integrated precision electroacoustic devices, including electronic buzzer, as a warning function for different electronic devices. 


Small and thin, with exquisite workmanship and high production efficiency. We try to meet the trend of making electronic products ultimate small and thin.


It can be widely used for cell phone accessories, tablet personal computer accessories, Bluetooth system devices, bank payment system, terminal device of Internet of things, wearable smart devices, GPS system, medical devices, etc.

1. Our products meet the standard of ROHS,REACH,IOS:9001-2008,etc.

2. The item that sound pressure level value and Audible distance  is just for reference.It depends on your using environment. In general,smaller the buzzer is,shorter the valid hearing distance is.

3. Pin feet can be plated with gold or brass.

4. We can provide more detailed information if you need certain type's specification.For example,picture of structure of product.

5. We can offer solution and advice according to your operating requirement.Helping you choose the type you need.


tape and reel 1包装图1包装图2

Housing Material LCP plastic   resin (Color : Black)
Terminal SMD Type
Dimension L4.0×W4.0×H2mm
Weight 0.07g
Packing 2.5k PCS /   Carrier Reel 2.5k
Inner Box 330*330*30mm
1 roll carrier   reel  
Carton 370*350*350(MM)
10 Inner Box
25k PCS Buzzer 
Storage Life 6 months   preservation at room temp(25±3℃)Humidity   30%


ChangZhou Keliking Electronics Co., Ltd. is the full set solution supplier for micro SMT electroacoustics. We mainly deal with the designing, production and sales for micro SMT electroacoustic devices, we can offer the complete full set solution. 

Registered Capital is RMB 10,000,000. Business Scope:  designing, producing and sales for electronics; Import & export for different types of commodity and technology. 

The turnover in 2015 is RMB 50,000,000. In 2016, we started to strengthen upstream and downstream production chain and enlarge our range. This will further increase the sales volume in the future.

Factory Overview


R & D Stuff


Cooperation Company

Through seven years effort, we have established long term cooperation with Haier, OPPO, Lenovo, Philips, TCL, BYD, etc. famous brand. Product quality, delivery time and service have received good reputation.


Further contact with us!

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Call us

Changzhou Keliking Electronics Co., Ltd.
Contact:Mr. Yao
Tel:86 +519-88671999-801
Fax:86 +519-88671999-808
Add:1-1301 Hang Seng Science Park, Tianning District, Changzhou, Jiangsu, China

Copyright  Changzhou Keliking Electronics Co., LTD. All rights reserved.