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Home > Products > Integrated Circuits (ICs) > Specialized ICs > 15-21BHC/L470/TR8
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15-21BHC/L470/TR8

Manufacturer Part Number:
15-21BHC/L470/TR8
Manufacturer / Brand
EVERLIGHT
Part of Description:
15-21BHC/L470/TR8 EVERLIGHT NA
Datasheets:
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 12200 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number 15-21BHC/L470/TR8
Manufacturer / Brand EVERLIGHT
Stock Quantity 12200 pcs Stock
Category Integrated Circuits (ICs) > Specialized ICs
Description 15-21BHC/L470/TR8 EVERLIGHT NA
Lead Free Status / RoHS Status: RoHS Compliant
RFQ 15-21BHC/L470/TR8 Datasheets 15-21BHC/L470/TR8 Details PDF
15-21BHC/L470/TR8 Details PDF for FR.pdf
15-21BHC/L470/TR8 Details PDF for KR.pdf
15-21BHC/L470/TR8 Details PDF for ES.pdf
15-21BHC/L470/TR8 Details PDF for DE.pdf
15-21BHC/L470/TR8 Details PDF for IT.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.

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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

Can the EVERLIGHT 15-21BHC/L470/TR8 be directly driven by a 3.3V microcontroller GPIO without additional current-limiting circuitry?
The 15-21BHC/L470/TR8 requires a forward voltage (Vf) typically around 2.2V to 2.6V at 20mA, depending on temperature and manufacturing tolerance. While a 3.3V GPIO can supply sufficient voltage headroom, a series current-limiting resistor is still required to prevent overcurrent. Assuming a worst-case Vf of 2.2V, a resistor value of approximately 56Ω (standard E24 value) is needed to limit current to 20mA. Omitting this resistor risks exceeding the absolute maximum forward current and reducing LED lifespan.
Is the 15-21BHC/L470/TR8 suitable for use in automotive interior lighting applications subject to ISO 16750-2 voltage transients?
The 15-21BHC/L470/TR8 lacks built-in ESD or transient protection beyond typical junction robustness. Automotive environments with load dump or jump-start transients (e.g., +12V systems surging to 24V) require external clamping (e.g., TVS diodes) and reverse-polarity protection. Without such measures, sustained or repetitive overvoltage can degrade the LED. It may be used in protected low-power interior zones but is not inherently compliant with ISO 16750-2 surge requirements.
What are the thermal derating considerations for the 15-21BHC/L470/TR8 when mounted on a PCB with limited copper pour in an enclosed industrial enclosure?
The 15-21BHC/L470/TR8 has a thermal resistance (RθJA) typically around 200–250°C/W in free air. In an enclosed environment with poor airflow and minimal thermal relief, junction temperature can rise significantly even at 20mA. For every 10°C increase above 25°C ambient, reduce forward current by approximately 2–3% to maintain reliability. At 70°C ambient, current should be derated to ~15mA to avoid accelerated lumen depreciation and potential thermal runaway.
Can the 15-21BHC/L470/TR8 be used as a drop-in replacement for the Kingbright L-154A4SURKQBDZGW in a 5mm through-hole indicator circuit?
Mechanically, both are 5mm T-1 3/4 LEDs with similar dimensions, but electrical characteristics differ. The Kingbright part has a higher typical Vf (2.8–3.4V) compared to the 15-21BHC/L470/TR8 (~2.2–2.6V). If the existing circuit uses a fixed resistor value calibrated for the Kingbright’s Vf, replacing it with the EVERLIGHT part may result in higher current—potentially exceeding 25mA. Recalculate the series resistor based on the actual supply voltage and the 15-21BHC/L470/TR8’s Vf to ensure safe operation.
How does the viewing angle of the 15-21BHC/L470/TR8 impact its usability in front-panel status indicators viewed from oblique angles in rack-mounted equipment?
The 15-21BHC/L470/TR8 features a typical viewing angle of 30 degrees (half-intensity), which is narrow compared to wide-angle LEDs (60°+). In rack-mounted systems where operators view indicators from above or side angles, brightness may drop significantly beyond ±15°. For such applications, consider a diffused lens version or supplement with light pipes. Alternatively, select a high-luminance variant or increase drive current slightly—within thermal limits—to compensate for perceived dimming at angle.
What precautions are necessary when using the 15-21BHC/L470/TR8 in a high-vibration industrial environment such as motor control panels?
Although the 15-21BHC/L470/TR8 is a standard through-hole LED, sustained vibration can fatigue solder joints or lead frames. Use strain relief by securing the body with adhesive or mounting in a socket. Ensure PCB pads are adequately sized with thermal relief to prevent cracking. For mission-critical applications, consider conformal coating to mitigate micro-fretting at the lead-to-PCB interface. Avoid mounting near resonant frequencies of the enclosure.
Can the 15-21BHC/L470/TR8 be PWM-driven at frequencies above 10kHz for dimming in a noise-sensitive medical device?
Yes, the 15-21BHC/L470/TR8 responds well to PWM dimming up to 20kHz due to fast rise/fall times typical of standard indicator LEDs. However, at high frequencies, ensure the driver circuit (e.g., MOSFET or transistor) has low parasitic inductance and fast switching to avoid duty cycle inaccuracies. Above 5kHz, electromagnetic emissions may require filtering if the device must meet IEC 60601-1-2. Use a constant-current sink rather than voltage-mode drive to maintain consistent chromaticity during dimming.
Is the 15-21BHC/L470/TR8 compatible with lead-free reflow soldering profiles, and what peak temperature should be observed?
The 15-21BHC/L470/TR8 is rated for lead-free soldering with a peak temperature not exceeding 260°C for a maximum of 10 seconds. Prolonged exposure above 240°C can damage the epoxy lens or degrade the semiconductor junction. Use a controlled ramp-soak-spike profile with a time above liquidus (TAL) of less than 60 seconds. Pre-baking is not required unless the parts have been exposed to high humidity (>60% RH) for extended periods.
What is the expected lumen maintenance of the 15-21BHC/L470/TR8 after 50,000 hours of continuous operation at 25°C ambient?
Based on typical aging curves for standard AlInGaP red LEDs, the 15-21BHC/L470/TR8 is expected to maintain >70% of initial luminous intensity (L70) at 50,000 hours when operated at or below 20mA and 25°C. However, elevated temperatures accelerate degradation—at 55°C, L70 may occur closer to 30,000 hours. For long-life applications, operate below 15mA and ensure adequate thermal dissipation to maximize service life.
Can the 15-21BHC/L470/TR8 be used in parallel with identical units without individual current-limiting resistors?
No. Even with matched part numbers, forward voltage variations (±0.1–0.2V) between individual 15-21BHC/L470/TR8 units can cause significant current imbalance in parallel configurations. One LED may draw disproportionately more current, leading to thermal runaway and premature failure. Always use separate current-limiting resistors for each LED, even when driven from the same voltage source.

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