Silicon Photodiode TO46

Product Overview-Silicon Photodiode TO46

Box Optronics offers high-performance Silicon PIN Photodiodes designed for visible and near-infrared light detection across the 400nm to 1000nm wavelength range. Featuring a 680×680μm active area with planar incident structure, these devices deliver high responsivity, fast response speed, low dark current, and low junction capacitance.

Available in two package configurations — hermetic TO46 flat-window metal can and fiber-coupled coaxial module — our silicon photodiodes provide flexible integration options for diverse application requirements. The TO46 package is ideal for free-space detection and PCB-level integration, while the fiber-coupled module offers convenient plug-and-play connectivity with a 50/125μm multimode fiber pigtail.

Both versions are RoHS-compliant and operate reliably over a wide temperature range from -40°C to +85°C. These attributes make the silicon photodiode series well-suited for optical power meters, optical sensors, space light detection equipment, and instrumentation applications requiring stable, high-sensitivity photodetection.

Key Features-Silicon Photodiode TO46

· Wide spectral response range: 400nm to 1000nm, covering visible and near-infrared bands

· High responsivity: 0.30A/W @ 650nm, 0.35A/W @ 800nm, 0.40A/W @ 900nm

· Fast response speed: rise/fall time ≤ 3.0ns, 100MHz 3dB bandwidth

· Low dark current: ≤ 1.0nA at 0V reverse bias

· Low junction capacitance: ≤ 5.0pF at 0V reverse bias

· Planar incident structure for uniform photoresponse

· Active area: 680×680μm square photosensitive region

· Two package options: TO46 flat-window hermetic can, fiber-coupled coaxial module

· Hermetic TO46 metal package for environmental protection

· Fiber-coupled version with 50/125μm multimode fiber pigtail

· RoHS compliant and lead-free construction

· Wide operating temperature range: -40°C to +85°C

Typical Applications-Silicon Photodiode TO46

· Optical power meters and optical power monitoring modules

· Laser power monitoring and feedback control systems

· Optical sensing and photoelectric detection systems

· Visible and NIR spectroscopyinstruments

· Medical and biomedical optical instruments

· Free-space optical detection and beam monitoring

· LiDAR and optical ranging systems

· Photonics research and laboratory instruments

Product Specifications-Silicon Photodiode TO46

Absolute Maximum Ratings (TC = 25°C)

Electro-Optical Characteristics (TC = 25°C)

Package Options and Pin Definition

TO46 Flat-Window Package (BSPD-680TO46A-FW)

Package Type: TO46 Hermetic Metal Can, Flat Window (3-pin TO-CAN)

Suitable for: Free-space optical detection, PCB-level integration, optical power meter heads, sensor applications

Fiber-Coupled Coaxial Module (BSPD-680P10-AFAM)

Package Type: Coaxial fiber-coupled module with laser welding

Fiber Type: 50/125μm multimode fiber

Connector:FC/APC (standard), other connector types available upon request

Suitable for: Fiber optic test equipment, integrated optical systems, in-line power monitoring, sensor applications

Ordering Information

Available Models

Why Choose Box Optronics Silicon Photodiodes?

· Proven silicon photodiode chip technology with consistent performance and reliability

· Competitive pricing with factory-direct supply from our Shenzhen facility

· Flexible order quantities — support for both small R&D batches and volume production

· Customization options for package, fiber type

· Long-term supply stability for production programs

· RoHS compliant and lead-free manufacturing

· International shipping via DHL/UPS/FedEx with full tracking

Frequently Asked Questions (FAQ)

Q: What is the difference between the TO46 and fiber-coupled module versions?

A: Both versions use the same 680×680μm silicon photodiode chip and share identical electro-optical specifications. The difference is in packaging: the TO46 flat-window version is designed for free-space optical detection and direct PCB mounting, while the fiber-coupled module comes with a pre-aligned 50/125μm multimode fiber pigtail for direct integration into fiber-optic systems. Choose based on your optical interface requirements.

Q: What wavelength range do these silicon photodiodes cover?

A: The silicon photodiodes have a spectral response range of 400nm to 1000nm, covering the visible spectrum and near-infrared band. Peak responsivity is in the 800–900nm range, with typical values of 0.35A/W at 800nm and 0.40A/W at 900nm. They are not suitable for wavelengths beyond 1000nm — for 1310nm/1550nm applications, consider our InGaAs PIN photodiode series.

Q: What is the saturation power of the photodiode?

A: The minimum saturation optical power is 2mW. For input powers above this level, the photodiode response will begin to deviate from linearity. For higher power measurements, consider using an attenuator or selecting a photodiode with a larger active area.

Q: What is the minimum order quantity (MOQ)?

A: The MOQ forsilicon photodiode is 1 unit. We support flexible order quantities. For standard models, we can supply from just a few pieces for R&D and prototyping up to thousands of units for volume production. Contact us for specific pricing at your required quantity.

Q: Do you offer custom versions of these silicon photodiodes?

A: Yes, we provide customization services including custom fiber types and lengths, alternative connector options, and modified package configurations. Contact us with your requirements and our engineering team will review feasibility and provide a quotation.

Q: Are the TO46 packages hermetically sealed?

A: Yes, the TO46 flat-window package is hermetically sealed in a metal can with a glass window, providing protection against moisture, dust, and environmental contaminants. This ensures reliable long-term operation in various industrial and laboratory environments.

Datasheet

Silicon Photodiode Module

Silicon Photodiode TO-CAN

Lead Time

· Standard units (in-stock models): 3~5 working days

· Standard production: 10~15 working days

· Volume orders: Please contact for production schedule

· Custom orders: 3~4 weeks (depending on customization scope)

· International shipping: ~5 working days (DHL/UPS/FedEx express)

· Expedited service: Available upon request

Operation Notes and Handling

· Photodiodes are electrostatic discharge (ESD) sensitive devices — always use proper ESD protection when handling

· Avoid touching the leads and window directly with bare fingers to prevent contamination and ESD damage

· Store unused devices in ESD-safe packaging or conductive trays to prevent electrostatic discharge damage

· Do not exceed the absolute maximum ratings specified in the datasheet

· Clean the optical window with isopropyl alcohol and a lint-free swab if contamination occurs

· Soldering: Recommended soldering temperature ≤260°C for ≤10 seconds, at least 1.5mm from the case

· Observe proper polarity — reverse connection may cause permanent damage