Broadband UV Photodiode – SG01D-18S
The SG01D-18S is a Silicon Carbide (SiC) broadband UV photodiode packaged in a dual-lead configuration, designed for high stability and reliable long-term performance in demanding...
Broadband UV Photodiode – SG01D-18S
Stable Dual-Lead UV Photodiode with High Accuracy, Robust Design, and Long-Term Performance for Industrial Applications
The SG01D-18S is a Silicon Carbide (SiC) broadband UV photodiode packaged in a dual-lead configuration, designed for high stability and reliable long-term performance in demanding environments. With a responsivity peak of 0.160 A/W at 280 nm and a detection range spanning 221–358 nm, it delivers precise ultraviolet detection while ensuring excellent visible blindness. Its compact 0.06 mm² active area allows easy integration into both compact and large-scale systems. The device’s ultra-low dark current of 0.2 fA and capacitance of 15 pF enable low-noise, high signal-to-noise operation, ensuring accuracy even under weak UV intensities. Built to withstand operating temperatures from −55 °C to +170 °C, the SG01D-18S is rugged enough for industrial, aerospace, medical, and environmental monitoring applications. Its dual-lead package design enhances mechanical strength, making it suitable for flame detection, UV curing, sterilisation monitoring, ozone studies, and photonics R&D. The SG01D-18S is a dependable UV detector for critical use cases.
Understanding Broadband UV Photodiode - SG01D-18S
The SG01D-18S is a dual-lead SiC UV photodiode designed for selective ultraviolet detection with outstanding visible blindness. Delivering a responsivity of 0.160 A/W at 280 nm and covering the 221–358 nm range, it ensures precise UV monitoring without ambient light interference. Its compact 0.06 mm² active area makes it easy to integrate, while its ultra-low dark current of 0.2 fA provides low-noise performance. With 15 pF capacitance, it achieves fast response, critical for real-time monitoring tasks such as flame detection and UV curing control. Its rugged design and wide temperature tolerance (−55 °C to +170 °C) ensure long-term reliability.
Technical Specifications
| Feature | Specification |
| Typical Responsivity at Peak Wavelength | 0.160 A/W |
| Wavelength of Max. Responsivity | 280 nm |
| Responsivity Range (S = 0.1 × Smax) | 221 … 358 nm |
| Visible Blindness (Smax / S>405 nm) | > 10¹⁰ |
| Active Area | 0.06 mm² |
| Dark Current (1 V reverse bias) | 0.2 fA |
| Capacitance | 15 pF |
| Short Circuit (10 mW/cm² at peak) | 960 nA |
| 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
Selective UV Detection with SiC Technology
The SG01D-18S uses Silicon Carbide as the semiconductor material, delivering broadband UV sensitivity while naturally blocking visible and infrared light. This guarantees accurate ultraviolet-only detection, even in complex environments.
High Sensitivity and Stability
The device achieves a peak responsivity of 0.160 A/W at 280 nm, enabling precise UV intensity measurement. With ultra-low dark current of 0.2 fA, it ensures high-quality, noise-free signals across both low- and high-intensity UV conditions.
Rugged Dual-Lead Package
The dual-lead design improves stability during mounting and enhances mechanical durability. This makes the photodiode more robust in applications with mechanical vibrations or long-term outdoor exposure.
Fast Response with Low Capacitance
A capacitance of 15 pF ensures quick signal response, critical for real-time monitoring applications such as flame detection, UV curing control, and industrial process automation.
Thermal Resilience
With a working temperature range of −55 °C to +170 °C, the SG01D-18S can withstand extreme industrial and aerospace conditions without compromising accuracy.
Long-Term Reliability
The photodiode is resistant to UV degradation, ensuring that its responsivity remains consistent across years of use. This lowers replacement frequency and supports mission-critical applications.
Overall, the SG01D-18S provides compact design, enhanced stability, low-noise performance, and rugged reliability, making it an essential UV detector for demanding industrial, scientific, and defence applications.
Applications Across Industries
Environmental Monitoring
The SG01D-18S is widely used in solar UV radiation tracking, ozone analysis, and atmospheric science. Its excellent visible blindness ensures accurate datasets for research and climate monitoring.
Industrial Flame Detection
It is a preferred choice for flame detection systems in petrochemical plants, refineries, and energy stations. Its fast response enables early hazard detection, enhancing workplace safety.
Medical and Laboratory Applications
In healthcare and laboratories, it is employed for UV dosimetry, sterilisation monitoring, and calibration of phototherapy systems. Its accuracy ensures compliance with medical safety standards.
UV Curing in Manufacturing
Manufacturers use the SG01D-18S to monitor UV curing processes for adhesives, inks, and coatings. The photodiode ensures curing consistency, optimising quality and efficiency.
Photonics and Semiconductor Research
In R&D environments, it is utilised for characterising UV-sensitive semiconductors and testing photonic devices. Its stability and compact footprint make it highly practical for laboratories.
Aerospace and Defence
Thanks to its rugged dual-lead packaging and thermal resilience, the SG01D-18S is ideal for aerospace UV monitoring, arc detection, and defence-grade sensing applications.
The SG01D-18S demonstrates versatility and reliability across environmental, industrial, medical, research, and aerospace sectors, establishing itself as a trusted broadband UV photodiode.
Why Choose United Spectrum Instruments?
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Authorised distributor of SGLUX UV photodiodes in India
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Reliable local stock with fast delivery and reduced lead times
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Application-specific consultation and integration expertise
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Comprehensive after-sales support, training, and pan-India service
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Trusted by leading universities, industries, and defence organisations
FAQs
What is the peak responsivity of the SG01D-18S?
It achieves 0.160 A/W at 280 nm.
What is the advantage of the dual-lead package?
It provides extra mounting stability and robustness against mechanical stress.
Can it withstand extreme temperatures?
Yes, it operates between −55 °C and +170 °C.
What industries typically use this photodiode?
It is used in flame detection, UV curing, environmental monitoring, medical sterilisation, and aerospace sensing.
How does United Spectrum support customers in India?
United Spectrum provides quick delivery, expert technical consultation, and nationwide after-sales service.
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FAQs
What is the peak responsivity of the SG01D-18S?
It achieves 0.160 A/W at 280 nm.
What is the advantage of the dual-lead package?
It provides extra mounting stability and robustness against mechanical stress.
Can it withstand extreme temperatures?
Yes, it operates between −55 °C and +170 °C.
What industries typically use this photodiode?
It is used in flame detection, UV curing, environmental monitoring, medical sterilisation, and aerospace sensing.
How does United Spectrum support customers in India?
United Spectrum provides quick delivery, expert technical consultation, and nationwide after-sales service.
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