Optical Sensors & Detector – UV Photodiodes
UVA+UVB+UVC+VUV Photodiode – SG03R20-5
Broadband UV Photodiode for UVA, UVB, UVC, and VUV Detection in Compact Industrial and Scientific Systems
The SG03R20-5 is a Silicon Carbide (SiC)-based broadband photodiode engineered to detect UVA, UVB, UVC, and vacuum ultraviolet (VUV) radiation with high precision. Covering a wide responsivity range from 200–400 nm with extended sensitivity into the VUV, it is ideal for applications requiring full-spectrum UV monitoring. With a compact 0.5 mm² active area, the SG03R20-5 balances sensitivity with low capacitance for fast response, making it suitable for real-time monitoring and embedded device integration. Offering peak responsivity of 0.10 A/W in the deep-UV range, ultra-low dark current (0.1 fA), and capacitance of 50 pF, it delivers noise-free, stable signals. Silicon Carbide technology ensures complete visible blindness, eliminating interference from IR and visible wavelengths. Designed for harsh environments, it operates reliably from −55 °C to +170 °C. The SG03R20-5 is widely applied in UV sterilisation validation, plasma monitoring, environmental safety, aerospace radiation studies, and advanced photonics research.
Understanding UVA+UVB+UVC+VUV Photodiode - SG03R20-5
The SG03R20-5 is a compact broadband photodiode designed for detection of UVA, UVB, UVC, and VUV radiation. With its 0.5 mm² active area, it is optimised for applications requiring fast responsiveness and reliable integration into portable or embedded UV monitoring systems. Its responsivity covers 200–400 nm, peaking in the deep-UV region, making it suitable for germicidal monitoring and VUV diagnostics. With ultra-low dark current (0.1 fA) and low capacitance (50 pF), it delivers clean, noise-free, and rapid signal responses. Rugged Silicon Carbide construction ensures complete visible blindness and reliable operation from −55 °C to +170 °C in demanding environments.
Technical Specifications
| Feature | Specification |
| Spectral Range |
UVA, UVB, UVC, VUV (200 – 400 nm, extended VUV)
|
| Peak Responsivity |
0.10 A/W (deep-UV region)
|
| Active Area | 0.5 mm² |
| Visible Blindness | > 10¹⁰ |
| Dark Current (1 V reverse bias) | 0.1 fA |
| Capacitance | 50 pF |
| Short Circuit (10 mW/cm² at peak) | 4.7 µA |
| Temperature Coefficient | < 0.1 %/K |
| Operating Temperature | −55 … +170 °C |
| Storage Temperature | −55 … +170 °C |
| Soldering Temperature (3 s) | 260 °C |
| Maximum Reverse Voltage | 20 V |
Key Features and Advantages
Broadband Responsivity Across UVA–VUV
The SG03R20-5 provides sensitivity across UVA, UVB, UVC, and VUV wavelengths, supporting diverse applications requiring full-spectrum UV detection.
Compact Active Area
With its 0.5 mm² active area, the device provides strong photocurrents while enabling integration into compact and portable systems.
Fast Responsiveness
Low capacitance of 50 pF ensures rapid response times, making it suitable for real-time monitoring and process control.
Noise-Free Signals
The device achieves ultra-low dark current (0.1 fA), guaranteeing stable and clean outputs even at low intensities.
Pure UV Detection
Constructed from SiC, the SG03R20-5 eliminates interference from visible and IR light, delivering pure UV-only measurements.
Rugged and Reliable Operation
Capable of operating from −55 °C to +170 °C, the photodiode is suitable for extreme environments, from aerospace to industrial safety.
Durability and Long-Term Stability
The SiC material resists UV-induced degradation, ensuring consistent calibration and long-term reliability.
By combining multi-band responsivity, compact design, and rugged durability, the SG03R20-5 is a versatile broadband UV photodiode for mission-critical monitoring.
Applications Across Industries
Medical and Healthcare
The SG03R20-5 is applied in portable UV sterilisation validation, dermatological monitoring, and medical UV safety devices.
Industrial Sterilisation
It validates broadband UV disinfection systems used in pharmaceutical production, food packaging, and cleanroom environments.
Environmental Monitoring
The photodiode supports atmospheric UV index monitoring, water disinfection systems, and air sterilisation applications for safety compliance.
Scientific Research
Researchers employ it for broadband UV source calibration, plasma diagnostics, and photonics experiments across UVA to VUV.
Aerospace and Defence
Its rugged design and wide thermal range make it suitable for aerospace radiation monitoring and defence safety equipment.
Portable and Embedded Systems
Compact form factor makes it ideal for handheld UV meters, IoT-enabled sensors, and embedded UV monitoring devices.
By offering broadband detection, compact size, and rugged stability, the SG03R20-5 is trusted for UVA, UVB, UVC, and VUV applications.
Why Choose United Spectrum Instruments?
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Authorised distributor of SGLUX broadband UV photodiodes in India
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Local stock for faster delivery and reduced lead times
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Competitive pricing across industrial, healthcare, and scientific markets
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Application-specific consultation for broadband UV system integration
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Nationwide after-sales service, technical training, and customer support
FAQs
What UV bands does the SG03R20-5 detect?
It covers UVA, UVB, UVC, and VUV radiation (200–400 nm, extended VUV).
What is the size of its active area?
It has a compact 0.5 mm² active area, ideal for integration into portable systems.
Does it block visible and infrared light?
Yes, its SiC design ensures complete visible blindness.
Can it operate in extreme environments?
Yes, it functions reliably across −55 °C to +170 °C.
How does United Spectrum support Indian customers?
By offering local stock, quick delivery, expert guidance, and nationwide after-sales service.
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FAQs
What UV bands does the SG03R20-5 detect?
It covers UVA, UVB, UVC, and VUV radiation (200–400 nm, extended VUV).
What is the size of its active area?
It has a compact 0.5 mm² active area, ideal for integration into portable systems.
Does it block visible and infrared light?
Yes, its SiC design ensures complete visible blindness.
Can it operate in extreme environments?
Yes, it functions reliably across −55 °C to +170 °C.
How does United Spectrum support Indian customers?
By offering local stock, quick delivery, expert guidance, and nationwide after-sales service.
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