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PT550F
Sharp Microelectronics
SENSOR PHOTO 800NM TOP TO206AA
1645 Pcs New Original In Stock
Phototransistors 800nm Top View TO-206AA, TO-18-3 Metal Can
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Minimum 1
Minimum 1
5.0 / 5.0
- (434 Ratings)
PT550F
Product Overview
7927950
DiGi Electronics Part Number
PT550F-DGManufacturer
Sharp Microelectronics
PT550F
Description
SENSOR PHOTO 800NM TOP TO206AAInventory
1645 Pcs New Original In Stock
Phototransistors 800nm Top View TO-206AA, TO-18-3 Metal Can
Quantity
Minimum 1
Minimum 1
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PT550F Technical Specifications
Category
Optical Sensors, Phototransistors
Packaging
-
Series
-
Product Status
Obsolete
Voltage - Collector Emitter Breakdown (Max)
35 V
Current - Collector (Ic) (Max)
100 mA
Current - Dark (Id) (Max)
1 µA
Wavelength
800nm
Viewing Angle
100°
Power - Max
150 mW
Mounting Type
Through Hole
Orientation
Top View
Operating Temperature
-25°C ~ 125°C (TA)
Package / Case
TO-206AA, TO-18-3 Metal Can
Datasheet & Documents
Datasheets
Download PT550F Product Specification (PDF)
Design Resources
Development Tool Selector
HTML Datasheet
PT550F-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8541.49.7080
Additional Information
Other Names
425-1021-5
Standard Package
50
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
문의사항에 대한 응답이 항상 빠르고 친절해서 매우 만족스럽습니다.
December 02, 2025
웹사이트를 통해 쉽게 원하는 서비스를 찾을 수 있었습니다.
December 02, 2025
Chaque expérience avec DiGi Electronics renforce ma confiance en leur marque.
December 02, 2025
Shopping with DiGi Electronics always meets my expectations for quality and affordability.
December 02, 2025
I highly recommend DiGi Electronics for their unmatched product standards.
December 02, 2025
I appreciate how transparent DiGi Electronics is about pricing, making my purchasing decisions much easier.
December 02, 2025
I’ve had great experiences with DiGi Electronics' friendly staff.
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Frequently Asked Questions (FAQ)
Can the PT550F be used as a direct replacement for the TCRT1000 in a high-temperature industrial sensing application, and what design risks should I consider?
The PT550F can function similarly to the TCRT1000 in reflective object detection applications, but key design risks must be addressed. Unlike the TCRT1000, which integrates an IR LED and phototransistor, the PT550F is a standalone phototransistor requiring an external 800nm IR source. At high temperatures near 125°C, ensure the external emitter’s output doesn’t degrade disproportionately. Also, verify signal margin—the PT550F’s 100° viewing angle increases ambient light susceptibility compared to the TCRT1000’s narrow coupling. Use optical shielding and modulated carrier frequencies to reduce false triggering. Note: PT550F is obsolete, so long-term supply and lifecycle risk require mitigation.
How does the PT550F's metal can TO-206AA package affect EMI performance and thermal management in motor control encoder designs?
The PT550F’s metal can TO-206AA package provides inherent EMI shielding, beneficial in noisy motor control environments where electromagnetic interference could falsely trigger the phototransistor. However, the through-hole metal package limits PCB heat dissipation despite its 150 mW power rating—ensure average power remains well below max to avoid localized heating near sensitive analog components. Mount the PT550F away from heat-generating devices and consider potting or shielding cans for additional EMI protection. The metal case must also be electrically grounded or isolated depending on circuit topology to prevent leakage paths.
What are the reliability risks of using the obsolete PT550F in a new medical device design, and are there preferred drop-in alternatives?
Using the obsolete PT550F in a new medical device introduces significant supply chain and long-term reliability risks. Despite its robust TO-206AA metal can and MSL-1 rating, obsolescence increases the chance of counterfeit parts or microcracks from older inventory. For new designs, consider alternatives like the Everlight PT301-3C or Vishay TEFT4300, which offer similar 800–850nm sensitivity and TO-18 packages but with active production and better traceability. If using PT550F, secure extended inventory and perform incoming inspection for parametric drift and hermeticity.
How do I optimize the load resistor and amplifier stage when interfacing the PT550F with a microcontroller in low-light ambient conditions?
To optimize PT550F performance in low-light, select a load resistor that balances response speed and sensitivity—typically 10kΩ to 100kΩ. Higher values increase output voltage swing but slow rise/fall times due to junction capacitance. For very low-light conditions, follow the PT550F with a transimpedance amplifier using a low-input-bias-current op-amp (e.g., LMC662) to convert photocurrent efficiently. Use shielded cables and modulated IR signals to reject ambient light interference. Always include a 0.1 µF ceramic bypass capacitor near the PT550F’s supply to reduce noise coupling into the high-impedance node.
What thermal and optical design trade-offs arise when replacing the PT550F with a surface-mount phototransistor like the Vishay BPW77 in high-vibration environments?
Replacing the PT550F with the surface-mount BPW77 sacrifices the mechanical robustness of the TO-206AA metal can and through-hole mounting, increasing failure risk in high-vibration environments like industrial automation or automotive under-hood systems. The PT550F’s metal package offers superior hermeticity and stress resistance compared to BPW77’s plastic molding. If switching, reinforce the PCB with adhesive or gasket mounts and verify performance across -25°C to 125°C. Additionally, align the BPW77’s viewing angle (typically 20°) carefully—its narrower field reduces ambient light but may require tighter mechanical tolerances than the PT550F’s 100° angle.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
PT550F CAD Models
Sharp Microelectronics PT550F PCB symbols & footprints
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