Elecsound Blog

Elecsound is a manufacturer of trimming potentiometers, pcbs, capacitors, leds and resistors

0402 SMD Resistors

Elecsound can offer types of resistors. both SMD and axial and also dipped. we offer bulk pack.ammo pack and tape/reel.
Type: Axial, chip, radial and network
Series: Carbon film, fusible, metal film, metal oxide, wire wound, wire wound cement, etc.
Watt: 1/16W, 1/8W, 1/4W, 1/2W, 1W to 10W
Size: 0402, 0603, 0805, 1206, 1210, 2010, 2512, 4x2MM, 6x2MM, 9x3MM, etc.
Resistance range: 1 ohm to 10M ohm
Tolerance: +/-1% to +/-5%

Zinc Oxide Varistor

Do you need Varistors ? Now our varistors are selling well with the very competitive price,fast lead time and good quality, for some items we even have stock,if you are interested in,please contact with me.
Below sizes for your information. Welcome to inquire.
There are 5mm, 7mm, 10mm, 14mm and 20mm dipped varist as below.And we  can make lead free and with many approvals.
zinc oxide varistor
5mm zinc oxide varistor
7mm zinc oxide varistor
10mm zinc oxide varistor
14mm zinc oxide varistor
20mm zinc oxide varistor

Metal Film Fixed Resistors

We are very strong in ZINC OXIDE VARISTOR, we can offer below size with good price. We can make lead free and with many approvals.
5mm Dipped ZINC OXIDE VARISTOR
7mm Dipped ZINC OXIDE VARISTOR
10mm Dipped ZINC OXIDE VARISTOR
14mm Dipped ZINC OXIDE VARISTOR
20mm Dipped ZINC OXIDE VARISTOR
I.E.: Application of 7mm Dipped ZINC OXIDE VARISTOR:
Transistor, Diode, IC, Thyristor or diac semiconductor protection
Surge protection in consumer electronics
Surge protection in industrial electronics
Surge protection in electronic home appliance, gas and petroleum.
Relay and electromangnetic valve surge absorption

SMD Resistor

We are strong in electronic component field. Concentrating on SMD resistor/diode/transistor etc. Which belong to Lead-free environmental products. Our factory have advanced production and inspection equipments and facilities, perfect quality management system. Here are our chip resistors as below.
Special Features:
Type: Axial, chip, radial and network
Series: Carbon film, fusible, metal film, metal oxide, wire wound, wire wound cement, etc.
Watt: 1/16W, 1/8W, 1/4W, 1/2W, 1W to 10W
Size: 0402, 0603, 0805, 1206, 1210, 2010, 2512, 4x2MM, 6x2MM, 9x3MM, etc.
Resistance range: 1 ohm to 10M ohm
Tolerance: +/-1% to +/-5%

0402 SMD Resistors

Elecsound can offer types of resistors. both SMD and axial and also dipped. we offer bulk pack.ammo pack and tape/reel.
Type: Axial, chip, radial and network
Series: Carbon film, fusible, metal film, metal oxide, wire wound, wire wound cement, etc.
Watt: 1/16W, 1/8W, 1/4W, 1/2W, 1W to 10W
Size: 0402, 0603, 0805, 1206, 1210, 2010, 2512, 4x2MM, 6x2MM, 9x3MM, etc.
Resistance range: 1 ohm to 10M ohm
Tolerance: +/-1% to +/-5%

SMD Chip Resistor 0603

Our SMD Chip Resistor 0603 are excellent in quality and price.
Feature:
Miniature and Light weight
Suit for reflow and wave flowsolder
Stable electrical capability. High reliability.
Low assembly cost, suit for automatic SMT equipment
Superior mechanical and frequency characteristics
RoHS compliant
Resistance 0~10M
Resistance Tolerance 1%, 5%, 10%
Rated Power 1/16W
Max. Working Voltage(V): 25V
Max. Overload Voltage: 50V
Risistance Range (1%): 100≤ R≤ 2.2M
Risistance Range(5%): 100≤ R≤ 2.2M 1.0≤ R<10
Termal Coefficient(PPM): ± 100. ± 200; +500~-250
Zero Resistor Max Current: 0.63

Surface Insulation Resistance

Also known as insulation resistance (IR) or moisture and insulation resistance (M&IR) testing, Surface Insulation Resistance (SIR) testing is an industry-standard way of assessing the potential of a board to fail through corrosion and other processes associated with ionic contamination.We shall come across this test regularly throughout this module, for the reason that increases in leakage current can effect the operation of most circuitry, particularly as operating currents are generally moving downwards.
 
As described in Fluxes for soldering, SIR is used to evaluate fluxes and cleaning processes, but SIR is also used for evaluating board finishes. The mechanisms relating to the surface finish that can cause failure during the test reflect both the material choice and the process conditions, in particular any ionic contamination remaining after the plating process.
 
Traditionally, measurements are reported as insulation resistance (in ohms or Megohms) rather than as leakage current. This conversion is simple via Ohm’s Law, V = I x R, where V is the test voltage and I is the leakage current. The diagrams in Figure 9 show typical circuitry used to apply a 45–50VDC bias voltage and to measure the resistance with a reverse polarity 100VDC test voltage.
 
Although all these parameters will greatly influence the results, changes in SIR can be used validly to compare different processes by using repeatable settings which are representative of the application. Some tests may simulate equipment life, while other tests are carried out with a 100VDC test voltage and a 45–50VDC bias of reverse polarity, in an ambient with 90–98%RH (relative humidity), and at temperatures of 55ºC, 65ºC or 85ºC, to accelerate the ageing of samples. However, it is important to realise that an extreme environment may cause some surfaces to fail by mechanisms that do not apply under normal operating conditions.
 
Typical SIR test regimes will look for a minimum of 100MW insulation resistance, both at the outset and after a period of exposure to a defined combination of voltage, temperature and humidity. As with all humidity tests, accurate measurements in situ are difficult to make, and parts may be removed from the chamber for testing. Also, for higher levels of humidity, where water absorbed or condensed on the surface may affect the insulation resistance measurement, it is not uncommon to specify a defined period of ‘recovery’ after exposure and before retesting. Common cumulative exposure periods are one, four and 21 days, with specimens that have acceptable insulation resistances being returned to the chamber after each retest, if they have been removed for testing.

SMD Chip Resistor 0603


Our SMD Chip Resistor 0603 are excellent in quality and price.

Feature:

Metal-Film-Fixed-Resistors

 

We can offer below kinds of Resistors,if you are interested in,please email us for more details. I take our Metal Film Fixed Resistors as an example for your reference.
Metal Film Fixed Resistors
Low temperature coefficient, high precision, low noise and good frequency performance
Operating ambient temperature: -55 to +125′C
The resistor color is blue
We can according to the customers requirement to supply various tolerance(for example: ± 0.5%, ± 0.1%, ± 0.2%, ± 0.01%) and lower T. C. R (for example: 10, 15, 25ppm)

Carbon-Film-Fixed-Resistor-Elecsound

 

Are you in need of resistors? Now,our varistors are selling well with the very competitive price,fast lead time and good quality, for some items we even have stock,if you are interested in,please contact with me.
Below sizes for your information,more details,welcome to inquire.
 
ER1 – Carbon Film Fixed Resistor
Stable performance, extensive resistance, small size, high operating temperature and high ultimate voltage
Highly adaptive pulse load, good high frequency performance
Operating ambient temperature : -55℃ to +125℃
Rohs Compliant
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