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Description
OPTEK TECHNOLOGY OP550A Phototransistor, 935 nm, 100 mW, 2 Pins, Side LookingThe OP550A is a NPN Silicon Phototransistor with wide receiving angle. The OP550 series devices consist of NPN silicon phototransistors moulded in clear epoxy packages. The wide receiving angle provides relatively even reception over a large area. The side looking package is designed for easy PCB mounting of slotted optical switches or optical interrupt detectors. This series is mechanically and spectrally matched to the OP140 and OP240 series of
The OP550A is a NPN Silicon Phototransistor with wide receiving angle. The OP550 series devices consist of NPN silicon phototransistors moulded in clear epoxy packages. The wide receiving angle provides relatively even reception over a large area. The side-looking package is designed for easy PCB mounting of slotted optical switches or optical interrupt detectors. This series is mechanically and spectrally matched to the OP140 and OP240 series of infrared emitting diodes.
- 30V Collector to emitter voltage
- 5V Emitter to collector voltage
Applications
Industrial
Product details
| Transistor Case Style | Side Looking |
| Automotive Qualification Standard | - |
| Packaging | Each |
| Product Range | - |
| Wavelength Typ | 935nm |
| Viewing Angle | - |
| No. of Pins | 2Pins |
| Power Consumption | 100mW |
| MSL | - |
Other details
| Brand | OPTEK TECHNOLOGY |
| Part Number | OP550A |
| Quantity | Each |
| Technical Data Sheet EN |
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4.2 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 4
I'd recommend it, especially at this give-away-price
As a sociologist, I was always interested as to how the USSR could morph what Marx considered communalism networked by a shallow, weak, centralized and supposedly representative government into what I would considered an extremest left-wing oligarchy (most fashionably consider it right-wing despite how it was sold and supported by the people that allowed it- so much for cultural relativity and in context social analysis!). If Stalin actually wrote these pieces (or more commonly among dictators farmed it out to a frightened academic ghostwriter) then it could help explain why Marx disassociated himself with much of the Marxist movement toward the end of his life. It is a logically written and well informed book - worth the read if you are into the sociology of politics, philosophy of politics or the history of politics. I'd recommend it, especially at this give-away-price!
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Reviewed in the United States on August 9, 2017
★★★★★ 3
Good book, mediocre edition
Format: Paperback
This review pertains to the quality of this edition's editing and construction, rather than the content of the book itself. Rest assured that the text itself remains a valuable piece of introductory theory.
The book is fairly well constructed, with paper and a binding that is sturdy enough for general use. However, my copy had several manufacturing errors including folded over pages being stuck into the binding. In addition, there are several misspelled words throughout the text and some obvious typos (missing letters, incorrect capitalization and punctuation) that did not majorly impact the readability of the text, but were, nevertheless, annoying.
Considering the low price of this edition the manufacturing errors are hardly a big deal, but I would have preferred the text itself to have been treated with more care and respect while being prepared for printing.
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Reviewed in the United States on September 13, 2025
★★★★★ 5
thoughts on Xi Jinping
Format: Kindle
This book was highly organized and very easy to comprehend. I have formed a much better understanding of Xi Jinping and where he is taking China. Although I feel he has been thoughtful and successful in some areas such as improving China economically, I don’t feel his autocratic approach will succeed in the long run when more Chinese people will demand to be heard. Just as Mao thought didn’t outlast Mao, Xi thought will not outlast Xi.
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Reviewed in the United States on February 1, 2025
★★★★★ 5
The Book I Meant to Write
Format: Kindle
While doing my master’s degree in international relations, I completed a master’s thesis on Xi Jinping Thought (which, like the authors, I shortened to Xi Thought). I considered writing a book on the subject since there wasn’t a lot in English, but I no longer feel the need. This book fills every gap that was present. Well written and informative, it is the quintessential English source in Xi Thought.
The authors put Xi’s political thought in a consultative Leninist paradigm and define that context clearly. Each chapter elucidates a little more and puts Xi thought front and center in China’s current transformation. I consider it a must read.
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Reviewed in the United States on March 19, 2024
★★★★★ 5
Great read and most importantly very topical
Format: Audiobook
The writers use published work of Xi and Chinese government official statements to describe the true nature of this most important Chinese leader who will have profound impact on the total world.Like it or not it is essential for all of us to really what he is preparing his nation for the vision he has.Americans are naive and totally ignorant.
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Reviewed in the United States on July 19, 2025