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AVAILABLE IN PEAK WAVELENGTHS FROM 250 NM TO 280 NM > INDUSTRY LEADING LIGHT OUTPUT AVAILABLE IN BINS FROM 0.5 mW TO 4 mW > EXCELLENT SPECTRAL QUALITY > TYPICAL LIFETIME OF 3000 HOURS AT MAXIMUM DRIVE CURRENT > EXCEPTIONAL RELIABILITY > VIEWING ANGLE OF 15 ° > MAXIMUM DRIVE CURRENT OF 100 mA IN CONTINUOUS MODE > HERMETICALLY SEALED LEDS > RoHS-COMPLIANT

Optan is binned by emission wavelength, between 250 nm and 280 nm, and by optical power from 0.5 mW to 4 mW. Part Number1 Peak Wavelength Optical Output at 100 mA2 Min Typical Max Min Max OPTAN250H 245 nm 250 nm 255 nm 0.5 mW 1.0 mW OPTAN250J 245 nm 250 nm 255 nm 1.0 mW OPTAN255H 250 nm 255 nm 260 nm 0.5 mW 1.0 mW OPTAN255J 250 nm 255 nm 260 nm 1.0 mW OPTAN260H 255 nm 260 nm 265 nm 0.5 mW 1.0 mW OPTAN260J 255 nm 260 nm 265 nm 1.0 mW OPTAN275H 270 nm 285 nm 0.5 mW 1.0 mW OPTAN275J 270 nm 275 nm 280 nm 1.0 mW 2.0 mW OPTAN275K 270 nm 275 nm 280 nm 2.0 mW 3.0 mW OPTAN275L 270 nm 275 nm 280 nm 3.0 mW OPTAN280J 275 nm 280 nm 285 nm 1.0 mW 2.0 mW OPTAN280K 275 nm 280 nm 285 nm 2.0 mW 3.0 mW OPTAN280L 275 nm 280 nm 285 nm 3.0 mW Notes: 1. LEDs are produced with semiconductor technology that is subject to process variation, yielding a range of flux performance that is approximately Gaussian in nature. To provide customers with fine granularity within the overall flux distribution, Crystal IS separates LEDs into optical power bins. 2. Output power is measured using a 100 mA current pulse of < 1s duration at an ambient temperature of 25°C +/- 5°C with the diode inserted into an integrating sphere. LED Characteristics1 Characteristic Unit Min. Typical Max. Viewing angle2 degrees 15 Full width at half maximum nm 12 Forward voltage at 100 mA3 V 10 Lifetime, L50 at 100 mA4 hours 3000 Lifetime, L50 at 20 mA4 hours 8000 Thermal resistance, junction-to-case °C/W 37 Power dissipation W 1.0 Forward current (Continuous) mA 100 Reverse voltage V -5 Operating temperature range °C -5 55 Storage temperature °C -40 100 Junction temperature °C 85 Notes: 1. All measurements completed at an ambient temperature of 25°C wherever applicable. 2. Viewing angle is the off axis angle from the center of the beam where the light output is 1/2 of the peak value. 3. Voltage tolerance is +/-5%. 4. L50 is the time at which light output drops to 50% of original value during continuous operation at 25°C.

DATA SHEET: OPTAN WWW.CISUVC.COM Typical Radiation Pattern Optan LEDs with a ball lens have a nominal viewing angle of 15°. Typical Electrical Characteristics The typical forward voltage is less than 10 V at an operating current of 100 mA. 180 165 150 135 120 105 90 75 1.0 0.8 0.6 0.4 0.2 0.0 NORMALIZED INENSITY, A.U. RADIATION PATTERN Test Conditions: I(CW) = 100 mA 100 CURRENT, mA 0 1 2 3 4 5 6 7 8 9 10 VOLTAGE, V TYPICAL ELECTRICAL CHARACTERISTICS Test Conditions: I (Pulsed mode) = 1 to 100 mA; Case Temperature (TC ) = 25°C

Typical Spectral Characteristics Over Current The plot below shows the stability of the peak wavelength with various applied currents. No shift is typically observed in the peak wavelength with change in drive current from 100 mA to 20 mA. Typical Spectral Characteristics Over Temperature The plot below illustrates the stability of the spectral characteristics with change in temperature. No shift is typically observed in the peak wavelength with change in case temperature from 20°C to 60°C. 100 INTENSTIY, a.u. 240 260 280 300 WAVELENGTH, nm 100 mA 60 mA 20 mA I (Pulsed Mode) SPECTRUM VS. CURRENT Test Conditions: Case Temperature (TC ) = 25°C INTENSTIY, a.u. 240 260 280 300 WAVELENGTH, nm 20º C 40º C 60º C Case Temperature (T C) SPECTRUM VS. TEMPERATURE Test Conditions: I (Pulsed Mode) = 100 mA

Typical Light Output Characteristics Over Current The plot below shows the typical variation in light output with forward current. The light output data is normalized to the light output at 100 mA. Typical Light Output Characteristics Over Temperature Output power is very sensitive to junction temperature, so proper thermal management techniques are suggested to control junction temperature. Lower junction temperatures will ensure the optimal performance and lifetime of the LED. The plot below shows the change in optical power with increase in junction temperature. A typical drop of 5% in light output is noticed for a 10°C rise in temperature. 100 RELATIVE LIGHT OUTPUT, % 0 20 40 60 80 100 FORWARD CURRENT (PULSE), mA LIGHT OUTPUT OVER CURRENT Test Conditions: Case Temperature (TC ) = 25°C 100 RELATIVE LIGHT OUTPUT, % 20 30 40 50 60 70 80 90 JUNCTION TEMPERATURE (T J ), ºC LIGHT OUTPUT OVER TEMPERATURE Test Conditions: I (Pulsed Mode) = 100 mA DATA SHEET: OPTAN WWW.CISUVC.COM

All dimensions are in millimeters. Unless noted otherwise, all dimensions have a tolerance of +/- 0.05 mm. Reliability Prior to releasing Optan LEDs to production, Crystal IS submitted a representative product sample set through pre-release qualification tests. Our pre-release qualification test suite, shown below, is based on standard semiconductor pre-release qualification test conditions and methods defined by the Joint Electron Device Engineering Council (JEDEC). Test Test Conditions Test Duration Room temperature operating life (RTOL) 25°C, 100 mA 1000 hours High temperature operating life (HTOL) 85°C, 100 mA 1000 hours Low temperature operating life (LTOL) -40°C, 100 mA 1000 hours High temperature high humidity operating life 55°C, 85% RH, 100 mA 1000 hours High temperature storage 100°C 1000 hours Low temperature storage -40°C 1000 hours Temperature cycle -40°C (30 min), 100°C (30 min) 100 cycles Vibration 200m/sec 2, 100-2000-100Hz, 48 minutes 4 cycles, 4 minutes, each X, Y, Z Mechanical Dimensions The Optan package is comprised of a header with a copper slug and a Kovar cap that is welded to the header to provide hermetic sealing. The cap contains a fused silica ball lens which provides the nominal viewing angle of 15°. OPTAN TO-39 PACKAGE WITH BALL LENS anode cathode case Ø 5.4 ±0.005 Ø 9.15 13.46 ± 0.75 2.4 5.8 nom. Ø 0.43 +0.050 -0.025 Ø 8.4 +0.05 -0.07 R2.54 45° Ø 3.5 45° -0.01

DATA SHEET: OPTAN WWW.CISUVC.COM Recommended Soldering Guidelines 1. The pitch of the LED lead should match the pitch of the mounting holes on the PCB during component placement. 2. The tip of the soldering iron should never touch the lens. 3. Recommended soldering pattern is illustrated in Figure 1. In addition, please ensure that the central copper slug in the header is thermally connected to the board with thermal paste or grease. A heat sink should be used to keep the case temperature of the LED below 55°C at a forward current of 100 mA. Please refer to the Crystal IS thermal management note HS01 for heat sink recommendations. 4. After soldering, avoid applying external force, stress, and excessive vibration until the product has returned to ambient temperature. Recommended Soldering Conditions Distance between melted solder sides to bottom of LED should be 3 mm or longer. Parameter Dip Soldering (Lead Free Solder) Hand Soldering (Lead Free Solder) Pre Heat 90°C max. (Backside of PCB) -- Pre Heat Time 60 seconds max. -- Temperature 260°C max. (Solder Bath) 300°C max. (Soldering Iron Tip) Soldering Time 5 seconds max. 3 seconds max. Recommended Cleaning > Cleaning with isopropyl alcohol is recommended. Propanol and ethyl alcohol may also be used. > DO NOT use ultrasonic cleaners with Crystal IS LEDs. > DO NOT use acetone or trichloroethylene to clean Crystal IS LEDs. Problems with LEDs such as reduction in light output, opens, or shorts can be prevented as long as the LEDs are soldered under these conditions. CIRCUIT BOARD THERMAL PASTE (MIDDLE) COPPER SLUG (TOP) THERMAL PAD (BOTTOM) Figure 1

70 Cohoes Avenue www.cisuvc.com Green Island, NY 12183 518.271.7375 U.S.A. sales@cisuvc.com ©2014 Crystal IS, Inc. All rights reserved. Crystal IS and the Crystal IS logo are trademarks of Crystal IS, Inc. and/or its affiliates. All other trademarks are the property of their respective owners. 1004-1410 Recommended Operation Crystal IS LEDs should be mounted on a heat sink to keep the case temperature below 55°C at a forward current of 100 mA during operation. Please refer to the Crystal IS thermal management note HS01 for heat sink recommendations. Circuits should be designed for constant current. Handling Precautions LEDs are sensitive to static electricity. When handling, proper ESD protection is required, including: > Eliminating static charge > Using grounded wriststrap, ESD footwear, clothes, and floors > Grounded workstation and tools Eye Safety Guidelines During operation, the LED emits high intensity ultraviolet (UV) light, which is harmful to skin and eyes. UV light is hazardous to skin and may cause cancer. Avoid exposure to UV light when LED is operational. Precautions must be taken to avoid looking directly at the UV light without the use of UV light protective glasses. Do not look directly at the front of the LED or at the LED’s lens when LED is operational. Attach the following warning labels on products/systems that use UV LEDs. RoHS Compliance The levels of environmentally sensitive, persistent biologically toxic (PBT), persistent organic pollutants (POP), or otherwise restricted materials in this product are below the maximum concentration values (also referred to as the threshold limits) permitted for such substances, or are used in an exempted application, in accordance with EU Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS), as amended through April 21, 2006. We invite you to learn more about our UVC LEDs. Disclaimer The information in this document has been compiled from reference materials and other sources believed to be reliable, and given in good faith. No warranty, either expressed or implied, is made, however , to the accuracy and completeness of the information, nor is any responsibility assumed or implied for any loss or damage resulting from inaccuracies or omissions. Each user bears full responsibility for making their own determination as to the suitability of Crystal IS products, recommendations or advice for its own particular use. Crystal IS makes no warranty or guarantee, express or implied, as to results obtained in end-use, nor of any design incorporating its Products, recommendation or advice. Each user must identify and perform all tests and analyses necessary to ensure that it’s finished application incorporating Crystal IS’ products will be safe and suitable for use under end-use conditions. Each user of devices assumes full responsibility to become educated in and to protect from harmful irradiation. Crystal IS specifically disclaims any and all liability for harm arising from buyer’s use or misuse of UVC devices either in development or end-use.