-5-

Nichia

STSE-CH2056C

<Cat.No.

040206>

(5) Soldering Conditions

· Solder the LED no closer than 3mm from the base of the lead.

· Recommended soldering conditions

Dip Soldering

Soldering

Pre-Heat

Pre-Heat Time

Solder Bath

Temperature

Dipping Time

Dipping Position

120°C Max.

60 seconds Max.

260°C Max.

10 seconds Max.

No lower than 3 mm from the

base of the lead.

Temperature

Soldering Time

Position

350°C Max.

3 seconds Max.

No closer than 3 mm from the

base of the lead.

· Do not apply any stress to the lead particularly when heated.

· The LEDs must not be repositioned after soldering.

· After soldering the LEDs, the lead should be protected from mechanical shock or vibration until

the LEDs return to room temperature.

· Direct soldering onto a PC board should be avoided.

Mechanical stress to the glass may be caused

from warping of the PC board or from the clinching and cutting of the leads.

When it is

absolutely necessary, the LEDs may be mounted in this fashion but the User will assume responsibility

for any problems.

such as wire bond failure or glass deterioration, will occur.

Nichia’s LEDs should not be soldered

directly to double sided PC boards because the heat will deteriorate the glass.

· When it is necessary to clamp the LEDs to prevent soldering failure, it is important to minimize

the mechanical stress on the LEDs.

· Cut the LED leads at room temperature.

Cutting the leads at high temperatures may

cause failure of the LEDs.

(6) Heat Generation

· Thermal design of the end product is of paramount importance.

Please consider the heat generation

of the LED when making the system design.

The coefficient of temperature increase per input

electric power is affected by the thermal resistance of the circuit board and density of LED placement

on the board, as well as other components. It is necessary to avoid intense heat generation and operate

within the maximum ratings given in this specification.

· The operating current should be decided after considering the ambient maximum temperature of LEDs.

(7) Cleaning

· It is recommended that isopropyl alcohol be used as a solvent for cleaning the LEDs.

When using

other solvents, it should be confirmed beforehand whether the solvents will dissolve the resin or not.

Freon solvents should not be used to clean the LEDs because of worldwide regulations.

· Do not clean the LEDs by the ultrasonic.

When it is absolutely necessary, the influence of ultrasonic

cleaning on the LEDs depends on factors such as ultrasonic power and the assembled condition.

Before cleaning, a pre-test should be done to confirm whether any damage to the LEDs will occur.