NICHIA STS-DA1-2745F <Cat.No.180611>

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CAUTIONS

(1) Lead Forming

● The lead frame should be bent at least 3mm from the bottom of the lens. Do not use the bottom of the lens as a fulcrum for

bending.

● Lead frame forming (i.e. shaping/trimming the lead frame) should be done before soldering the LED; if it is done after soldering,

Nichia will not guarantee its reliability.

● When shaping/trimming the lead frame, ensure that the resulting stress is not applied to the bottom of the lens. This may damage

the characteristics of the LED.

● If the LEDs are attached to a PCB or any other substrate (e.g. plastic plate), ensure that the hole on the substrate matches with

the lead frame dimensions (e.g. pitch). Otherwise, it may cause the lens to deform causing reliability issues (e.g. the LED to have

a reduction in the radiant flux or not to illuminate [i.e. catastrophic failure]).

(2) Storage

● Before opening the anti-electrostatic bag, ensure that LEDs are stored at <30°C and 70% RH and used within three months. To

store these LEDs after this period, use a hermetically-sealed container filled with nitrogen and place silica gel desiccants in this

container with the LEDs; the LEDs must not be stored for longer than one year from the date that the LED is delivered.

● This LED has a silver-plated lead frame. If the LEDs are exposed to a corrosive environment, it may cause the plated surface to

tarnish causing issues (i.e. solderability). Ensure that LEDs are stored under proper conditions/environment and soldered to a

PCB immediately.

● To avoid condensation, the products must not be stored in the areas where temperature and humidity fluctuate greatly.

● Do not store the LEDs in a dusty environment.

● Do not expose the LEDs to direct sunlight and/or an environment over a long period of time where the temperature is higher than

normal room temperature.

(3) Directions for Use

● The circuit must be designed to ensure that the Absolute Maximum Ratings are not exceeded for each LED. The LEDs should be

operated at a constant current per LED. In the case of operating at a constant voltage, Circuit B is recommended. If Circuit A is

used, it may cause the currents flowing through the LEDs to vary due to the variation in the forward voltage characteristics of the

LEDs on the circuit.

(A)

(B)

● This LED is designed to be operated at a forward current. Ensure that no voltage is applied to the LED in the forward/reverse

direction while the LED is off. If the LEDs are used in an environment where reverse voltages are applied to the LED continuously,

it may cause electrochemical migration to occur causing the LED to be damaged. When not in use for a long period of time, the

system’s power should be turned off to ensure that there are no issues/damage.

● To stabilize the LED characteristics while in use, Nichia recommends that the LEDs are operated at currents ≥ 10% of the sorting

current.

● Ensure that transient excessive voltages (e.g. lighting surge) are not applied to the LEDs.

● If the LEDs are used for outdoor applications, ensure that necessary measures are taken (e.g. protecting the LEDs from water/salt

damage and high humidity).

● Although this LED is specifically designed to emit invisible light, a small amount of light in the visible region exists in the emission

spectrum. Ensure that when using the LEDs for sensors, verification is performed to ensure that the emission spectrum is fit for

the intended use.

● If this LED is stored and/or used constantly under high temperature and high humidity conditions, it may accelerate the

deterioration of the die; this may cause the radiant flux to decrease. If the LEDs are stored and/or used under these conditions,

sufficient verification must be done prior to use to ensure that there are no issues for the chosen application.