Light Emitting Diode
This document contains tentative information, Nichia may change the contents without notice.
3/12 SP-QR-C2-210575-1
Jul. 9, 2021
Assembly Precautions for the Nichia 144 Series LEDs
2. Handling Precautions Incorrect
Incorrect
Figure 1. Example of an Improper
Holding Position
Caution: Do not grab/hold the LEDs
with tweezers around the
encapsulating resin.
Figure 2. Example of Improper
Stacking
Caution: Do not stack assembled
PCBs on top of each other.
Handling with bare hands
Do not handle the LEDs with bare hands:
- this may contaminate the LED surface and have an effect on the optical characteristics,
- this may cause the LED to deform and/or the wire to break causing a catastrophic failure (i.e. the LED
not to illuminate),
- the lead frame may cause injuries when the LED is handled with bare hands.
Handling with tweezers
Ensure that when handling the LEDs with tweezers, excessive force is not applied to the LED. Otherwise, it
may cause damage to the resin (e.g. cut, scratch, chip, crack, delamination and deformation) and the
internal connection to fail causing a catastrophic failure (i.e. the LED not to illuminate).
ESD Precautions
LEDs are sensitive to transient excessive voltages (e.g. ESD, lightning surge). If this excessive voltage
occurs in the circuit, it may cause the LED to be damaged causing issues (e.g. the LED to have a reduction
in the radiant flux or not to illuminate [i.e. catastrophic failure]). When handling the LEDs, ensure that
necessary measures have been taken to protect them from transient excess voltages. Refer to the
applicable specification for more details.
Stacking assembled PCBs together
Do not stack assembled PCBs together. Otherwise, it may cause damage to the resin (e.g. cut, scratch,
chip, crack, delamination and deformation) and the internal connection to fail causing a catastrophic
failure (i.e. the LED not to illuminate).
Baking
The storage/packaging requirements for the Nichia 144 Series LEDs are comparable to JEDEC Moisture
Sensitivity Level (MSL) 3 or equivalent. Nichia used IPC/JEDEC STD-020 as a reference to rate the MSL of
this LED. If the “After Opening” storage time has been exceeded or any pink silica gel beads are found,
ensure that the LED are baked before use. Baking should only be done once.
Conditions Temperature Humidity Time
Storage
