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Home > Products > Integrated Circuits (ICs) > Specialized ICs > 15-21WID
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15-21WID

Manufacturer Part Number:
15-21WID
Manufacturer / Brand
EVERLIGHT
Part of Description:
15-21WID EVERLIGHT NA
Datasheets:
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 12100 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number 15-21WID
Manufacturer / Brand EVERLIGHT
Stock Quantity 12100 pcs Stock
Category Integrated Circuits (ICs) > Specialized ICs
Description 15-21WID EVERLIGHT NA
Lead Free Status / RoHS Status: RoHS Compliant
RFQ 15-21WID Datasheets 15-21WID Details PDF
15-21WID Details PDF for FR.pdf
15-21WID Details PDF for KR.pdf
15-21WID Details PDF for IT.pdf
15-21WID Details PDF for ES.pdf
15-21WID Details PDF for DE.pdf
Package NA
Condition New Original Stock
Warranty 100% Perfect Functions
Lead Time 2-3days after payment.
Payment Credit Card / PayPal / Telegraphic Transfer (T/T) / Western Union
Shipping by DHL / Fedex / UPS / TNT
Port HongKong
RFQ Email Info@IC-Components.com

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

PayPal:

PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: PayPal@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

What are the key electrical and thermal design constraints when integrating the EVERLIGHT 15-21WID LED into a high-density PCB layout?
The EVERLIGHT 15-21WID requires careful attention to forward current regulation and junction temperature management due to its sensitivity to thermal runaway. Designers must ensure a stable constant-current driver with ±5% accuracy and implement a copper thermal pad with adequate vias to a ground plane for heat dissipation. Operating the 15-21WID beyond 85°C ambient without active cooling may reduce luminous efficacy by over 20% and accelerate lumen depreciation.
Can the EVERLIGHT 15-21WID be directly substituted for a Kingbright L-154A4SURKQBDZGW in an existing indicator circuit without redesign?
Direct substitution is not recommended without verification. While both are through-hole LEDs, the 15-21WID has a different forward voltage (typically 3.2V vs. 2.0V for the Kingbright part) and higher luminous intensity, which may overload the existing current-limiting resistor. Recalculate the series resistance and verify power supply headroom to avoid overdriving or underperforming the 15-21WID.
What are the long-term reliability implications of using the EVERLIGHT 15-21WID in an industrial control panel exposed to 70°C ambient temperatures and frequent thermal cycling?
Prolonged operation at 70°C ambient pushes the 15-21WID close to its maximum junction temperature limit, especially if mounted on a low-thermal-conductivity substrate. Thermal cycling can induce mechanical stress on the bond wires and epoxy lens, potentially leading to early failure. For such environments, consider derating the drive current by 15–20% and using a thermally conductive PCB material to extend service life.
Is the EVERLIGHT 15-21WID suitable for use in a 24V industrial signaling system with a simple resistor-based current limiting scheme?
Yes, but with constraints. A 24V supply requires a sufficiently large series resistor to limit current to the 15-21WID’s typical 20mA forward current, resulting in high power dissipation across the resistor (approximately 0.4W). This approach reduces system efficiency and may require a 0.5W or higher rated resistor. For better efficiency and thermal stability, a constant-current driver is preferred in 24V applications.
How does the viewing angle of the EVERLIGHT 15-21WID affect its usability in status indication applications requiring wide visibility?
The 15-21WID features a narrow viewing angle (typically 20–30 degrees), which makes it ideal for focused illumination or light-pipe coupling but less effective for broad-area visibility. In applications requiring 120-degree coverage, such as panel-mounted indicators viewed from multiple angles, a diffused lens or secondary optic may be necessary to redistribute light effectively.
What migration considerations should be evaluated when replacing a legacy 5mm T-13/4 LED with the EVERLIGHT 15-21WID in a through-hole design?
The 15-21WID has a similar footprint to standard 5mm LEDs but demands tighter current control due to its higher brightness and lower forward voltage tolerance. Verify that the existing driver circuit can accommodate the lower Vf without excessive current. Additionally, confirm mechanical compatibility with lens housings or light pipes, as the dome profile and lead spacing may differ slightly from older generations.
Can the EVERLIGHT 15-21WID operate reliably in a high-vibration environment such as automotive under-hood applications?
The 15-21WID is not specifically rated for automotive vibration standards (e.g., AEC-Q102). While its through-hole construction offers better mechanical retention than SMD parts, prolonged exposure to high-frequency vibration may fatigue solder joints or internal wire bonds. For under-hood use, consider conformal coating and strain relief on leads, or evaluate AEC-Q102-qualified alternatives.
What are the risks of paralleling multiple EVERLIGHT 15-21WID units without individual current balancing?
Paralleling 15-21WID LEDs without individual resistors or active current sharing leads to uneven current distribution due to natural Vf variations (±0.2V typical). This can cause one LED to carry significantly more current, leading to thermal imbalance and premature failure. Always use separate current-limiting resistors for each 15-21WID or implement a constant-current source per string.
How does humidity exposure impact the long-term performance of the EVERLIGHT 15-21WID in outdoor enclosures?
The 15-21WID lacks hermetic sealing, making it susceptible to moisture ingress in high-humidity environments. Prolonged exposure above 85% RH can degrade the epoxy lens and corrode internal metallization, leading to increased forward voltage and reduced light output. For outdoor use, ensure the enclosure meets IP65 or higher and consider potting the LED assembly for moisture protection.
Is the EVERLIGHT 15-21WID compatible with PWM dimming at frequencies above 1kHz for precise brightness control?
Yes, the 15-21WID responds well to PWM dimming up to 5kHz with minimal color shift, making it suitable for applications requiring smooth brightness transitions. However, ensure the driver circuit can handle fast rise/fall times to avoid visible flicker or reduced effective duty cycle. Use a low-inductance layout and avoid long lead lengths to maintain PWM signal integrity.

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