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PART NO. NCSU434D(T)

PART NO. NCSU434D(T)

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PART NO. NCSU434D(T)

Product catalog summary

Specifications for UV LED

Part Number: NCSU434D(T)
Features: Pb-free reflow soldering, built-in ESD protection, RoHS compliant.

Absolute Maximum Ratings

Forward Current: 700 mA (IF1), 500 mA (IF2)
Pulse Forward Current: 700 mA
Allowable Reverse Current: 85 mA
Power Dissipation: 5.14 W
Operating Temperature: -40 to 100°C
Storage Temperature: -40 to 100°C
Junction Temperature: 110°C

Initial Electrical/Optical Characteristics

Forward Voltage: 5.2 V at 350 mA
Radiant Flux: 135 mW at 350 mA
Peak Wavelength: 280 nm at 350 mA
Spectrum Half Width: 10 nm at 350 mA
Thermal Resistance: 10.2°C/W

Ranks

Forward Voltage Ranks: B55 (5.5-6.0 V), B50 (5.0-5.5 V), B45 (4.5-5.0 V)
Radiant Flux Ranks: P17d21 (152-180 mW), P16d22 (128-152 mW), P16d21 (108-128 mW)
Peak Wavelength Ranks: U280ge (280-285 nm), U280eg (275-280 nm)

Soldering

Recommended reflow soldering conditions: Pre-heat 180-200°C, peak 260°C, max 10 sec above 220°C.
Reflow soldering should not be performed more than twice.
Use nitrogen atmosphere to prevent optical degradation.

Packaging

Products are shipped in moisture-proof bags with desiccants.
Warning labels for UV exposure are included.

Reliability Tests

Resistance to soldering heat, thermal shock, high/low temperature storage, operating life, vibration, and ESD tests conducted with no failures reported.

Cautions

Storage conditions: ≤30°C, ≤90% RH before opening; ≤30°C, ≤70% RH after opening for up to 168 hours.

Moisture Sensitivity and Storage
The LED is rated with a Moisture Sensitivity Level (MSL) of 3, using IPC/JEDEC STD-020 as a reference. The package can absorb moisture, which may cause internal damage during soldering. To prevent this, LEDs are stored in moisture-proof bags with silica gel. Once opened, LEDs should be soldered promptly or stored in a sealed container with desiccants. If storage time is exceeded, baking is required before use.

Usage Directions
Ensure the circuit design does not exceed the Absolute Maximum Ratings. Operate LEDs at a constant current and avoid reverse voltages. For outdoor applications, protect LEDs from environmental damage. Verify emission spectrum suitability for sensor applications.

Handling Precautions
Avoid handling LEDs with bare hands to prevent contamination and damage. Use care when using tweezers and avoid dropping or stacking PCBs to prevent physical damage.

Design Considerations
Use copper-core PCBs to manage thermal stress. Design PCB layouts to minimize mechanical stress during assembly. Avoid volatile organic compounds that may adhere to LED surfaces and reduce light output.

Electrostatic Discharge (ESD)
LEDs are sensitive to ESD and transient voltages. Use grounded equipment and ESD protection measures to prevent damage. Inspect LEDs for ESD damage by measuring forward voltage.

Thermal Management
Properly manage heat generated by LEDs to avoid exceeding the Maximum Junction Temperature. Use equations provided to calculate junction temperature and ensure adequate heat dissipation.

Cleaning
Avoid cleaning LEDs unless necessary, and verify cleaning conditions to prevent damage. Do not use ultrasonic cleaners without prior testing.

Eye Safety
Follow international safety specifications for photobiological safety. Provide appropriate warnings and protection against UV light exposure, which can be harmful to eyes.

Miscellaneous
Nichia provides a warranty for LEDs meeting specified reliability criteria. Deviations from specified conditions may void the warranty.

Warranty and Remedies
In the event of a warranty breach, customers must notify the local Nichia sales representative without disassembling or removing the LED from the PCB. If a breach is confirmed, Nichia will replace the non-conforming LED or provide an equivalent item at their discretion. These are the exclusive remedies available, and Nichia is not liable for indirect, incidental, or consequential losses, including profit loss.

Disclaimer of Other Warranties
Nichia disclaims all other express or implied warranties, including merchantability and fitness for a particular purpose.

Intended Use and Limitations
The LED is intended for general lighting and electronic devices but not for safety-critical applications like aircraft or life support systems. It does not comply with IATF 16949 and is not for automotive use. Nichia does not guarantee suitability for unintended applications and is not liable for resulting damages.

Intellectual Property and Specification Agreement
Customers must not reverse engineer the LED. All intellectual property rights are reserved by Nichia. Specifications must be agreed upon in writing before program launches, and changes may occur without notice unless a Customer Specific Specification is in place.

Catalog excerpts

NICHIA CORPORATION • Pb-free Reflow Soldering Application • Built-in ESD Protection Device • RoHS Compliant

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* Radiant Flux value as per CIE 127:2007 standard. * Rsjs is the thermal resistance from the junction to the Ts measurement point. (Test board: Al board thickness=1.5mm, copper layer thickness=0.105mm) * The Max value for the Rejs is for reference purposes only. * It is recommended to operate the LEDs at a current greater than 10% of the sorting current to stabilize the LED characteristics.

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* Forward Voltage Tolerance: ±0.07V * Radiant Flux Tolerance: ±8% * Peak Wavelength Tolerance: ±1.8nm * LEDs from the above ranks will be shipped. The rank combination ratio per shipment will be decided by Nichia.

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* *Snnnl£RoHSft^|c^£LTfcy£-fo This product complies with RoHS Directive. The dimension(s) in parentheses are for reference purposes.

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• Recommended Reflow Soldering Condition(Lead-free Solder) • Recommended Soldering Pad Pattern * This LED is designed to be reflow soldered to a PCB. If dip soldered or hand soldered, Nichia will not guarantee its reliability. * Reflow soldering must not be performed more than twice. * When the LEDs are cooled from the peak reflow temperature, ensure that the cooling is performed very gradually to avoid excessive stress on the LED (e.g. causing cracks in the solder joints). Ensure that sufficient preliminary verification is performed to ensure that there are no issues with the chosen reflow soldering...

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PACKAGING - BULK Part No. Nxxxxxxx No. STS-DA7-11842C Anti-static IC packs are shipped with desiccants in heat-sealed moisture-proof bags. シリカゲルとともにICパックをアルミ防湿袋に入れ、熱シールにより封をします。 anti-static IC Pack bag ICパック Desiccants シリカゲル Seal 熱シール NIC HIA CORPORATION 491 OKA, KAMINAKA, ANAN, TOKUSHIMA, JAPAN Warning and Explanatory Labels 警告ラベル UV LED Moisture-proof bags are packed in cardboard boxes with shock absorbing materials to fill empty spaces. アルミ防湿袋を並べて入れ、間隔にはクッション材を詰めます。・「UV LEDは紫外領域の光(UV光)を発します。」・「UV光は人間の目には見えませんが、光が見えていなくてもUV光により目を傷める可能性があります。」・「UV光を直接目にあてないでください。必ず適切な防具を着用してください。」...

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TAPE AND REEL DIMENSIONS Part No. Nxxx434x No. STS-DA7-21200 テーピング部 Tape エンボスキャリアテープ Embossed Carrier Tape トレーラ部/リーダ部 Trailer and Leader トップカバーテープ Top Cover Tape 引き出し方向 Feed Direction LED装着部 Loaded Pockets トレーラ部最小160mm（空部） Trailer 160mm MIN(Empty Pockets) 引き出し部最小100mm（空部） Leader with Top Cover Tape 100mm MIN(Empty Pocket) リーダ部最小400mm Leader without Top Cover Tape 400mm MIN * 数量は1リールにつき 1000個入りです。 Reel Size: 1000pcs * 実装作業の中断などでエンボスキャリアテープをリールに巻き取る場合、エンボスキャリアテープを強く(10N以上)締めないで下さい。 LED

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PACKAGING - TAPE & REEL Part No. Nxxxxxxx No. STS-DA7-11776C Reels are shipped with desiccants in heat-sealed moisture-proof bags. シリカゲルとともにリールをアルミ防湿袋に入れ、熱シールにより封をします。 Label ラベル Desiccants シリカゲル Seal 熱シール NIC HIA CORPORATION 491 OKA, KAMINAKA, ANAN, TOKUSHIMA, JAPAN Warning and Explanatory Labels 警告ラベル UV LED ・「UV LEDは紫外領域の光(UV光)を発します。」・「UV光は人間の目には見えませんが、光が見えていなくてもUV光により目を傷める可能性があります。」・「UV光を直接目にあてないでください。必ず適切な防具を着用してください。」・「UV LEDを組み込んだ製品には、適切な警告表示をしてください。」 Moisture-proof bags are packed in cardboard boxes with corrugated partitions. アルミ防湿袋を並べて入れ、ダンボールで仕切ります。 UV LEDs emit light...

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Lot Number is presented by using the following alphanumeric code. xxxx-Nichia's Product Number RRR-Ranking by Wavelength, Ranking by Radiant Flux, Ranking by Forward Voltage

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DERATING CHARACTERISTICS Part No. NCSU434Dx No. STS-DA7-21201B Ambient Temperature vs Allowable Forward Current 周囲温度-許容順電流特性 Derating1 Allowable Forward Current(mA) Ambient Temperature(°C) 周囲温度 Solder Temperature(Anode Side) vs Allowable Forward Current はんだ接合部温度(アノード側)-許容順電流特性 Derating2 Allowable Forward Current(mA)

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OPTICAL CHARACTERISTICS Part No. NCSU434D No. STS-DA7-21202A * All characteristics shown are for reference only and are not guaranteed. 本特性は参考です。 * The following graphs show the characteristics measured in pulse mode. パルス駆動により測定しています。 Relative Emission Intensity(a.u.) (Normalized to peak spectral intensity) 相対発光強度(最大強度で正規化) Directivity 指向特性 Radiation Angle 放射角度

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FORWARD CURRENT CHARACTERISTICS / TEMPERATURE CHARACTERISTICS Part No. NCSU434Dx No. STS-DA7-21203B * All characteristics shown are for reference only and are not guaranteed. 本特性は参考です。 * The following graphs show the characteristics measured in pulse mode. パルス駆動により測定しています。 Forward Voltage vs Forward Current 順電圧-順電流特性 Junction Temperature vs Forward Voltage ジャンクション温度-順電圧特性 Forward Current vs Relative Radiant Flux 順電流-相対放射束特性 Junction Temperature vs Relative Radiant Flux ジャンクション温度-相対放射束特性 TJ =25°C Relative Radiant Flux(a.u.) (Normalized at TJ=25°C) 相対放射束(TJ=25°Cで正規化) Relative Radiant Flux(a.u.)...

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FORWARD CURRENT CHARACTERISTICS / TEMPERATURE CHARACTERISTICS Part No. NCSU434Dx No. STS-DA7-21204B * All characteristics shown are for reference only and are not guaranteed. 本特性は参考です。 * The following graphs show the characteristics measured in pulse mode. パルス駆動により測定しています。 Forward Current vs Peak Wavelength 順電流-ピーク波長特性 Peak Wavelength(nm) ピーク波長 Junction Temperature vs Peak Wavelength ジャンクション温度-ピーク波長特性 286 Peak Waveleng

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CAUTIONS(1) Storage • The storage/packaging requirements for this LED 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. • This LED uses a package that could absorb moisture; if the package absorbs moisture and is exposed to heat during soldering, it may cause the moisture to vaporize and the package to expand and the resulting pressure may cause internal delamination. This may cause the optical characteristics to degrade. To minimize moisture absorption in storage/transit, moisture-proof aluminum...

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• 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. • 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...

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