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Marktech Introduces Next-Generation Silicon Photodiodes Pairing Spectral Selectivity with Speed and Sensitivity

New SiPDs with minimal-to-no visible-light sensitivity (MTD3910GC-F3 & MTD3910G-F3) and a blue-green-optimized device with 525 nm peak responsivity (MTD5052D3)

Image of o MTD3910GC-F3: No responsiveness below 675 nm and only minute sensitivity between 675–775 nm

Marktech’s new 25µm aperture 650nm peak wavelength red dot LEDs.
(Left)- 2.1mm square SMD and (Right) 1.6mm x 1.5mm super compact SMD

Latham, NY & Simi Valley, CA — November 21, 2025 — Marktech Optoelectronics, Inc. (“Marktech”) today announced a new family of silicon photodiodes (SiPDs) produced in the United States at Marktech’s Simi Valley, California facility and final-packaged in Japan in collaboration with Optrans Corporation. The devices combine fast response time, high photosensitivity, and low junction capacitance in cost-effective, molded-through-hole plastic packages—bringing precision spectral performance to compact, price-sensitive optical designs.

“Engineers need photodiodes that are tuned for their sensing band and still deliver speed, low noise, and value,” said Barry Jones, Silicon Detector Business Manager at Marktech. “Our latest SiPDs provide tightly targeted spectral behavior—either minimal to no visible response for clean NIR detection at 940 nm or a precise 525 nm peak for blue-green sensing—together with low junction capacitance and fast response that strengthen performance in demanding optical sensing applications.”

Product Highlights

MTD3910GC-F3 & MTD3910G-F3 — NIR 940 nm SiPDs with Minimal/No Visible Sensitivity

  • 940 nm spectral focus: Peak responsivity at 940 nm with strong suppression of visible light
  • Visible-light suppression options:
    • MTD3910G-F3: Enhanced filtering; virtually zero sensitivity below 775 nm
    • MTD3910GC-F3: No responsiveness below 675 nm and only minute sensitivity between 675–775 nm
  • Package: Molded through-hole plastic; small active area for fast response and low junction capacitance
  • Applications: Short-run plastic-fiber communications, security sensors, IR camera light sensing, oximetry/PPG, barcode scanners, rangefinders, and IR laser monitoring
  • Datasheets:
    MTD3910GC-F3 — https://specs.marktechopto.com/pdf/products/datasheet/MTD3910GC-F3.pdf
    MTD3910GC-F3 — https://specs.marktechopto.com/pdf/products/datasheet/MTD3910GC-F3.pdf

 

Image of MTD5052D3 — Blue-Green Optimized SiPD (Peak at 525 nm)
MTD5052D3 — Blue-Green Optimized SiPD (Peak at 525 nm)

MTD5052D3 — Blue-Green Optimized SiPD (Peak at 525 nm)

  • Spectral focus: Optimized for blue-green detection with 525 nm peak responsivity
  • Package: Cost-effective molded through-hole plastic; small active area for fast response and low capacitance
  • Applications: Light-barrier safety sensors, currency validation, optical switches, fluorescence, spectroscopy, and water-quality colorimetry
  • Datasheet: MTD5052D3 — https://specs.marktechopto.com/pdf/products/datasheet/MTD5052D3.pdf

Manufacturing & Quality

  • Production flow: Die fabrication and test in Simi Valley, California (U.S.A.) followed by final packaging in Japan with Optrans Corporation, a partner Marktech considers as the world’s leader in optoelectronic packaging and IR detector production.
  • Performance you can measure: Each device benefits from Marktech’s comprehensive optical and electrical characterization, ensuring consistent speed, sensitivity, and spectral fidelity across builds

Availability & Support:  
Contact us for technical questions or additional photodiodes customization (TIAs, TECs, optical filters, bespoke packages to OEM design specs)
Product Inquiries (U.S.): [email protected]
In Japan, Contact:
[email protected]

Samples of these new SiPDs are
available now through our distributors, Digi-Key and Mouser.
MTD5052D3                      Digikey                 Mouser
MTD3910GC-F3                Digikey                 Mouser
MTD3910G-F3                   Digikey                 Mouser

Visit Our Booth at Photonics West 2026 to Learn More About Our Photonics Silicon Photodiode Manufacturing Capabilities

Plan now to visit our booth (#259) at SPIE Photonics West, 17 – 22 January 2026 in San Francisco, California to help us celebrate 40 years of photonics innovation.
SPIE Photonics West is the optics and photonics industry’s flagship exhibition to meet the sector’s biggest names and learn about the latest innovations.

Learn more: https://spie.org/PW

See our PW26 company listing: (https://spie.org/ExhibitorDetail?ExpoID=5022&ExhibitorID=104424)

About Marktech Optoelectronics

Founded in 1985, Marktech Optoelectronics, Inc. (www.marktechopto.com) is a privately held joint venture of Optrans Corporation and Marktech International. Marktech is a top designer, low-volume packager, and fabless manufacturer of silicon photodiodes, as well as a value-added distributor of custom optoelectronics, including UV, visible, near-infrared (NIR), and short-wavelength infrared (SWIR) emitters, MWIR LEDs, detectors, InP epi wafers, and other compound semiconductors. Headquartered in Latham, NY, Marktech operates extensive optical and electrical testing laboratories for full characterization of detectors and emitters and pioneered tight sorting for LED peak wavelength and output power—still essential for many medical diagnostic applications.
https://marktechopto.com/

About Optrans Corporation

Optrans Corp. (https://optrans.com/) (Optrans), is a private, leading manufacturer of optoelectronic components, delivering high-performance solutions across the UV, visible, and infrared spectra. With fully integrated in-house manufacturing – from epiwafer growth to die fabrication to optical design, assembly, and advanced packaging – Optrans ensures precision, quality, and flexibility. The Optrans product lineup includes UV, visible, and IR LEDs (NIR, SWIR, MWIR), point-source LEDs, photodiodes, photo-reflectors, and phototransistors, all engineered for demanding applications that require spectral accuracy, thermal management, and long-term reliability. Headquartered in Kawasaki City, Optrans collaborates closely with manufacturing companies in Japan, Asia, Europe, and the United States and excels at providing consistent support from component development through module implementation and system integration.
https://optrans.com/

Media Contact
Gary Kardys
 
Chief Marketing Officer
[email protected]

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