LED SMD PLCC 2 3528 Blue SMT LED

Size and package, wavelength, brightness, current, voltage, viewing angle, lifesan, applications, temperature tolerance, quality standards are all the key point for Blue SMD LED. SMD LED have kinds of size of package, such as 3528 SMD LED, 5730 SMD LED, 2835 SMD LED, 5050 SMD LED ect. The one that we discussed today is 3528 SMT LED, 3528 refers to the size of SMD LED packahe in millimeters, which is 3.5*2.8*1.9mm(thickness). This is important for understanding how it will fit into the devices or lighting proejct. There will have two pad in the bottom of SMD LED to conntect the circuit, in this case, we also name is as PLCC 2 3528 SMD LED. We produce this Blue SMD LED with 465nm LED inside for lighting source with common bright type.  For most of SMD LED, the viewing angle will be 120 degree as long as there have no dome lens on the top. Same as this 3825SBC, it also have the 120 degree viewing angle. People might wondering why it's not 180 degree since it's flat top. Because the LED frame like a bowl, when we put the LED chip inside the middle of bowl and pass the current. The LED frame will narrow the emitting beam like a bowl. 

PLCC-2 3528 SMD LED Size:

3528 SMD LED Features: 

* Dimension of SMD LED: 3.5*2.8*1.9mm;

* Forward voltage: 3V Compatible;

* Wavelength 455-475nm;

* Lens type: Clear Lens

* High reliability and high radiation intersity;

Electrical Parameters:

* Pulse forward current condition: Duty 1% and pulse width=10us.

* Soldering condition: Soldering condition must be completed with 3 secongds at 260℃

Electrucal Optical Characteristics(Tc=25℃)

*Luminous Intensity is measured by ZWL600.

*θ1/2 is off-sxis angle at which the luminous intenity is half the axia luminous intensity;

Main application:

* Ideal for backlight;

* Indicator light; 

* LED decorative lamp;

HANDLING PRECAUTIONS:

Compare to epoxy encapsulant that is hard and brittle, silicone is softer and flexible Althouth its characteristiec significantly reduces thermal stress, it is more susceptible to damage by extemal mechanical force. As a result, special handling precautions need to be observed during assembly using silicone encapsulated Led products. Failure to comply might lead to damage and premature failure of the led

1. Handle the component along the side surfaces by using forceps or appropriate tools.

2, Do not directly touch or handle the silicone lens surface. It may damage the internal circuitry.

3, Do not stack together assembled PCBS containing exposed LEDs. Impact may scratch the silicone lens or damage the internal circuitry.

4, 4-A The inner diameter of the SMD pickup nozzle should not exceed the size of the LED to prevent air leaks;

    4-B A plible material is suggested for the nozzle tip to avoid acratching or damaging the LED surface during pickup.

    4-C The dimension of the component must be accurately programmed in the pick-and-place machine to insure precise pickup and avoid damage during production;

    4-D As silicone encapsulation is permeable to gases, some corrosive substances such as H2S might corrode silver plationg of leadframe. Special care should be taken if an LED with silicone encapsulation is to used near such substances. 

5, Please aviod continued exposure to the condensing moisture environment and keep the product away from repid transitions in ambiemt temperature.

6, Product in the original sealed package is recommended to be assembled within 24 hours of opening.