Electronics

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Electronics Suppliers and Manufacturers

Parts, Components & Raw Materials

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Parts, Components & Raw Materials Suppliers and Manufacturers

Passive Components

elec

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Passive Components Suppliers and Manufacturers

Guangdong South HongMing (HK) Electronic Science & Technology Co Ltd

 	 Varistor is a sort of sensitive component which resistance value can vary with the applied voltage, it is widely used in the instantaneous overvoltage protection and surge absorption of Electronic-electrical equipment.      Features:     	 Great range of varistor voltage:  18V to 1.8KV  	 Fast response to transient voltage (ns) 	 High great withstanding surge current 	 Excellent non-linearity voltage 	 Symmetric V-I characteristics 	 No following-on current 	 Long life      Range of application:     	 Used in surge protection for IC, transistor, diode semiconductor switch circuit. 	 Used in communication, telemetering, electrical control and various electronic equipment. 	 Suppress the instantaneous overvoltage caused by electromagnetic valve and relay. 	 Supprss the instantaneous overvoltage caused by power supply. 	 Suppress the instantaneous overvoltage caused by electronic circuits 	 Lightning protection for various kind of electronic appliances.      Technical conditions:&nbsp;     	 Carry our standard of GB/T10193, GB/T10194, GB/T10195-1997 and SJ/T10348-10349. 	 Measurement conditions For varistors of 05D, 07D, 10D, 14D, 20D Series, voltage across the varistor measured under 1 m A DC. 	 Varistor voltage: The voltage between two terminals with the specified measuring current applied is expressed by letter V. 	 Maximum continuous operating voltage: The maximum sinusoidal RMS voltage or maximum DC voltage that can be applied continuously in the specified environmental temperature range. 	 Working ambient temperature: -40C ~ +85C&nbsp; 	 Storage temperature range: -40C ~ +125C  

 Displayed is a piezo buzzer that can emit a clear and penetrating sound. It is well designed and engineered with precision to ensure reliable performance. The buzzer is applicable in a range of electronic systems.    Low or multi frequency design.   Wide applications.   Available in various designs.  

Piezo Buzzer

 This varistor is a type of metal-oxide varistor (MOV). The boundary between the zinc oxide grains and the neighboring composition forms a diode junction that allows current to flow from one direction only. The diameter of the varistor is customizable upon requests.  	 Wide applications. 	 Available in various designs.  

Zinc Oxide Varistor

Presented here is a ceramic capacitor with a disc-shaped design. It is precisely engineered for excellent performance. This ceramic-disc capacitor is easy to assemble.   Suitable for various electronic devices.   Available in assorted models.  

Ceramic-Disc Capacitor

Metallized Polypropylene Film capacitor High-pressure tolerance, high insulation resistance and low-profile, is suitable for the direct current, impulse and low-power circuits with high temperature.Specification Reference standard : IEC 60384-16, GB 10190Climate category : 40/105/21Rated temperature : 85CelsiusOperation temperature range: -40 ~ 105CelsiusRated voltage : 100Vdc ~ 2000VdcCapacitance range : 0.00047uF ~ 6.8uFCapacitance tolerance : +-5%(J), +-10%(K), +-20%(M) (20Celsius, 1kHz)Voltage proof between terminations : U=1.6UR, 5s (20celsius)Insultation resistance : 100Vdc &lt;=UR&lt;500VdcCR&lt;=0.33uF, IR&gt;=60000MΩ, CR&gt;0.33uF,t&gt;=20000MΩ.uF(20celsius, 100Vdc, 1min)UR&gt;=500VdcCR&lt;=0.33uF , IR&gt;=60000MΩ, CR&gt;0.33uF , t&gt;=20000MΩ.uF(20celsius, 500Vdc, 1min)Dissipation factor:1kHz : &lt;=0.001010kHz : &lt;=0.0020(CR&lt;=1uF) (20celsius)

Metallized Polypropylene Capacitor

This is a ceramic disc capacitor with different series available for high or medium voltages. Some of the series has semiconductive materials on the surface layer or barrier layer 
   Electronic components for various kinds of electronic devices   Detailed specification available on the company website  

Ceramic Disc Capacitor

 The ceramic disc capacitor is constructed of alternating layers of metal and ceramic. The ceramic layers act as the dielectric. It can be used in various electronic designs.    Material: ceramic, metal.   Wide applications.   Available in various designs.  

This electric buzzer emits a clear and penetrating sound. It can be driven directly by ICs. It boasts low frequency and multi-frequency capability. 	 Excellent workmanship. 	 Reliable performance.  

Electric Buzzer

These are film capacitors which are made of polyester or polypropylene. Some versions are metallized and/or has a miniature size.
   Polyester film capacitors: for DC and pulsing circuits of radio, TV and so on   Metallised polyester film capacitors: for filter, noise suppression and so on   Miniature-sized metallised polyester film capacitors: with epoxy resin powder coating  

Film Capacitors

These are piezo elements which include diaphragm, humidifier and ultrasonic transducers. The company also manufactures sound buzzers sensor and alarm components.
    Electronic components for various kinds of electronic devices  Detailed specification available on the company website  

Piezo Elements And Buzzers

This is an electromagnetic buzzer with a durable housing. It is finely engineered to ensure superior and dependable performance. The high-quality material promises an extended service life.
 
  Other designs are available. 
  Rugged structure. 
 

Electromagnetic Buzzer

This is a piezoelectric buzzer with a professional design. It is made under strict QC to promise quality you can rely on. This high-precision component is suitable for assorted electrical devices.
 
  Long service life. 
  Other designs are available. 
 

Piezoelectric Buzzer

 STANDARD ATMOSPHERIC CONDITIONS FOR MAKING MEASUREMENTS  	 AMBIENT TEMPERATURE : 15oC to 35oC(If there is any doubt on the results, the measurements shall be made at +20 +/- 5oC.) 	 RELATIVE HUMIDITY (R.H.) : 45% to 75% (If there is any doubt on the results, the measurements shall be made at 60% to 70%.) 	 AIR PRESSURE : &nbsp;86 kpa to 106 kpa. 	 OPERATING TEMPERATURE RANGE : -40oC to +105oC for which the capacitor can be operated continuously at rated voltage.    ELECTRICAL CHARACTERISTICS   	 Withstand Voltage (TV) :&nbsp;&nbsp;Between Terminals, Apply 150% of rated voltage for 60 sec., or 175% of rated voltage for 1~5 sec. at +20 +/- 5oC.The charging current must be &lt;= 1 Amp.&nbsp;Between Terminals &amp; Enclosure, Apply 200% of rated voltage for 2 to 5 sec. 	 Insulation Resistance (I.R.) : &gt;= 7,500 MOhm (C &lt;= 0.33 uF), &nbsp;&gt;= 2,500 MOhm*uF/C (C &gt; 0.33 uF) Apply Vt +/- 15% for 60 +/- 5 sec. at +20 +/- 5oC. Vt = 50 VDC if rated voltage &lt;= 100 VDC; Vt = 100 VDC if 100 VDC &lt; rated voltage &lt;= 500 VDC; Vt = 500 VDC if rated voltage &gt; 500 VDC. 	 Capacitance (CAP) : Within the tolerance specified. (at +20 +/- 5oC).&nbsp; 	 Measuring Frequency : 1 KHz +/- 10%.Measuring Voltage : &lt;= 1 Vrms.max. 	 Dissipation Factor (DF) : &lt;= 0.010 (1.0%) at 1 KHz. Measuring Frequency : 1KHz+/- 10% Measuring Voltage : &lt;= 1 Vrms.max. 	 Connection of Element : Shall be no open nor short-circuiting. The connection shall be stable. DF shall be &lt;= 0.010 (1.0%) at 1 KHz. Apply 200% of rated voltage for 10 times. 	 Solderability : More than 90% of circumferential surface of lead wire shall be covered with new solder. 	 Testing method per IEC 68-2-20 Ta. Soldering temperature : +260 +/- 5oC. 	 Immersion duration : 2 +/- 0.5 secs    

Metal Film Capacitor

Hunston Electronics Company

MEMS Microphone use for mobile phone, labtop, Intelligent voice products. 	 Size: 3.76*2.95*1.1mm / 4.72*3.76*1.25mm / 2.23*1.58*1.15mm / 4*3*1.06mm 	 Directional: Omnidirectional 	 Directivity of different 	 Terminal: SMD 	 RoHs &amp; reach 	 Please contact us to take more information.  

CMM Series

Power NTC Thermistor has an excellent non-linearity characteristic for the resistance and temperature, its appliance is an easy and effective method to protect electronic device through surge current restrainning.

 Feature of Power Thermistor  	 Power NTC thermistors are in small size but with a high power that to restrain the
	Surge current. 	 Power NTC thermistors&nbsp; possess the electronic character of fast reflection, high reliability and long-life for use. 	 The material has a high constant as &ldquo;B value&rdquo; with small remained resistance. 	 Power NTC thermistors have a large application range integrate products&nbsp; series.   Rage of Application  	 Switch mode power supply,&nbsp; Adapter. 	 Transformer,&nbsp; LED driver circuit. 	 Electronic rectifier,&nbsp; electronic heater. 	 Electric&nbsp; motor. 	 It has a protected function for RT , display, lighting device and circuit of different electronic equipment.   Certificates  	 Safety Approval Certificate: UL / CUL 	 Quality management system Certificates: &nbsp;ISO9001:2008&nbsp; 	 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ISO14001:2004   Electrical Characteristics  	 Rated Zero-Power ResistanceRN (&Omega;) : 5&plusmn;20% Ambient temp. Range:25℃&plusmn;2℃(TA).
	Testing voltage: 1.5VDC
	After placing for 1~2 hours under TA, the resistance value shall be measured. 	 Thermal Dissipation Constant &delta;(mW/℃) : &ge;15 , The thermal dissipation constant(&delta;) could be calculated by the ratio of a change in power dissipation(&Delta;P) of the thermistor to a change in temperature(&Delta;T) of the thermistor at a specified ambient temperature 	 Thermal Time Constant &tau;(s) : &le;68, The time(&tau; shall be measured within which the temperature change of NTC thermistor is reached at 63.2% of the ambient temperature change under zero power condition 	 Material Constant B : 2700&plusmn;10% B=T1T2/( T2- T1) &times;Ln (R1/R2), R1 , R2 is zero-power resistance at T1 , T2
	T1 = 298.15 K(25℃)&nbsp; T2 = 323.15 K(50℃) 	 Max.Steady State Current (A) : visible mechanical damage.
	&Delta;RN&nbsp;/ RN&nbsp;&le;20% (&Delta;R =∣RN-RN&#39;∣), 25℃&plusmn;2℃Ambient temp. Range, 5.0A&nbsp; Testing Current  

Power NTC  

 	 Applications to small sized electronic products:&nbsp; 	 This series is designed for easy handling, available with variety of adjustments method 	 Wide mounting sizes and types of adjustments available 	 Capacity ranges from 1.5 to 120pF 	 Sturdy mechanical structure against vibration of shock  

Variable Capacitor

This is a buzzer chip in a round shape. It is professionally designed to ensure excellent performance. This component is manufactured through very strict QC to promise reliability. 	 Long service life. 	 Other designs are available.  

Piezoceramic Element

 	 Operating temperature: -25~125℃ 	 Capacitance and dissipation factor testing condition: 25℃, 1Vrms, 1KHz 	 Dissipation factor ≦2.5% 	 Subclass: X1, Y1, Y2 	 Rated Voltage: 250, 400VAC 	 Voltage proof: 1500VAC, 2500VAC, 4000VAC 	 Insulation resistance ≧10000M&Omega; (500VDC) 	 Temperature Characteristic: Y5P, Y5U, Z5U, Y5V 	 Flame retardant epoxy resin: UL94-0 	 Recognized standards: UL, CSA, VDE, SEMKO, KTC, NEMKO, DEMKO, FIMKO, SEV, CQC.  

Y2 Ceramic Disc Capacitor

  Metallized Polypropylene Film capacitor   	 High-pressure tolerance, high insulation resistance and low-profile, is suitable for the direct current, impulse and low-power circuits with high tmerperature. 	 SpecificationReference standard : IEC 60384-16, GB 10190 	 Climate category : 40/105/21 	 Rated temperature : 85Celsius 	 Operation temperature range&nbsp;: -40 ~ 105Celsius 	 Rated voltage : 100Vdc ~ 2000Vdc 	 Capacitance range : 0.00047uF ~ 6.8uF 	 Capacitance tolerance : +-5%(J), +-10%(K), +-20%(M) (20Celsius, 1kHz) 	 Voltage proof between terminations : U=1.6UR, 5s (20celsius) 	 Insultation resistance : 100Vdc &lt;=UR&lt;500Vdc&nbsp; 	 CR&lt;=0.33uF, IR&gt;=60000M&Omega;, CR&gt;0.33uF,t&gt;=20000M&Omega;.uF 	 (20celsius, 100Vdc, 1min) 	 UR&gt;=500Vdc 	 CR&lt;=0.33uF , IR&gt;=60000M&Omega;, CR&gt;0.33uF , t&gt;=20000M&Omega;.uF 	 (20celsius, 500Vdc, 1min) 	 Dissipation factor:1kHz : &lt;=0.0010 	 10kHz : &lt;=0.0020 	 (CR&lt;=1uF) (20celsius)  &nbsp;  

CBB21 Capacitor

 	 ECM (Electret condenser microphone) use for Telephone, Walkie talkie, Intelligent voice products. ECM Drives have Omnidirectional / Unidirectional / Noise cancelling type of directional useing on different product design. 	 Size: 3mm to 25mm 	 Directional: Omnidirectional / Unidirectional / Noise cancelling 	 Directivity of different 	 Terminal: Wire / SMD / Solder pad / Wire with connector / Pin 	 RoHs &amp; reach 	 OEM customization is welcome 	 Please contact us to take more information.  

Microphone Unit

Evergreen (H.K.) PCB Limited

The highlighted rigid printed circuit board has a green solder mask and is finished with immersion gold. It comes in a 2-layer design and flaunts a high glass transition temperature. This rigid printed circuit board is meticulously crafted to ensure stable and efficient operation. 	 Rigid printed circuit board (PCB). 	 Material: FR-4 / CEM-3. 	 Layer: 2 layers. 	 Board thickness: 0.2mm / 0.4mm. 	 High TG: TG150 / TG170. 	 Finishing: immersion gold. 	 Solder mask: green color. 	 Blind via / buried via. 	 Oval shape. 	 Meticulous workmanship. 	 Stable and efficient operation.  

Rigid Printed Circuit Board

The superior-quality PCB sports a 2-layer construction with 3 thicknesses available. Its surface has been finished with OSP Entek, guaranteeing stable electrical conductivity with a long service life. This is an ideal power supply PCB, heavy copper UPS PCB, and battery charger PCB.

&bull; Material: FR-4/ CEM-3.
&bull; Superior quality.
&bull; 2-layer construction.
&bull; Stable electrical conductivity.
&bull; Board thickness: 1.2mm/ 1.6mm/ 2.0mm.
&bull; High Tg: Tg150/ Tg170.
&bull; Finished with OSP Entek on the surface.
&bull; Green solder mask.
&bull; An ideal power supply PCB, heavy copper UPS PCB, and battery charger PCB.&nbsp;

Rigid PCB

This PCB is a must-have in your electronic devices that connects capacitors, resistors and other active components for effective use. Its robust multi-layer housing depicts several circular accents with etched current pathways and soldered parts of durable create.&nbsp;

Features:
&bull; Material: FR-4.
&bull; Slim housing.
&bull; Robust multi-layer construction.
&bull; Showcase several circular accents with etched current pathways and soldered parts.
&bull; Promise durable use.
&bull; A must-have component in machineries, electronic devices and more.
&bull; Layer: 4-layer.
&bull; Thickness: 0.4mm.
&bull; Finishing: flash gold plating.
&bull; Solder mask color: green.

Applications:
&bull; HDI PCB COB PCB.
&bull; Wire bonding PCB.
&bull; Smart watch PCB.
&bull; Wearable watch PCB.

This PCB is made of the FR-4 material for a robust and durable construction. Built with 4 copper layers, this board promises excellent conductivity and reliable long-term performance with its surface well protected with solder mask and immersion gold finish.

&bull; Material: FR-4.
&bull; Multilayer PCB with 4 copper layers.
&bull; Board thickness: 1.2mm/ 1.3mm/ 1.4mm.
&bull; Finishing: Immersion gold.
&bull; Promise excellent conductivity and reliable long-term performance.
&bull; Robust and durable construction.
&bull; Green solder mask.
&bull; HDI PCB.
&bull; Console PCB with impedance control.
&bull; Auto mobile PCB.

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