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Description
STMICROELECTRONICS MJE340 Bipolar (BJT) Single Transistor, NPN, 300 V, 20.8 W, 500 mA, 240 hFEThe MJE340 is a 300V Silicon Planar NPN Complementary Power Transistor intended for use in medium power linear and switching applications. Fast switching times and very low saturation voltage resulting in reduced switching and conduction losses. Complementary to the MJE350 Well controlled hFE parameter for increased reliability Applications Industrial Product details Power Dissipation Pd 20. 8W DC Collector Current 500mA Collector Emitter Voltage
The MJE340 is a 300V Silicon Planar NPN Complementary Power Transistor intended for use in medium power linear and switching applications. Fast switching times and very low saturation voltage resulting in reduced switching and conduction losses.
- Complementary to the MJE350
- Well-controlled hFE parameter for increased reliability
Applications
Industrial
Product details
| Power Dissipation Pd | 20.8W |
| DC Collector Current | 500mA |
| Collector Emitter Voltage V(br)ceo | 300V |
| Transition Frequency ft | - |
| Operating Temperature Max | 150°C |
| Transistor Polarity | NPN |
| DC Current Gain hFE | 240hFE |
| No. of Pins | 3Pins |
| Product Range | - |
| Automotive Qualification Standard | - |
| Transistor Case Style | TO-225AA |
| MSL | - |
Other details
| Brand | STMICROELECTRONICS |
| Part Number | MJE340 |
| Quantity | Each |
| Technical Data Sheet EN |
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.
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4.5 ★★★★★
Based on 327 reviews
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Product Reviews
★★★★★ 5
Fun
Great product and works as advertised. My dog is small and was not that interested in it, but my black Labrador was all about it. Simple to use and easy to charge. It’s durable and has lasted against my lab so far.
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Reviewed in the United States on June 9, 2026
★★★★★ 2
No good
It’s not that great
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Reviewed in the United States on May 30, 2026
★★★★★ 4
My kitten loves this ball
I originally got this for my 14-year-old dog because he has always loved balls, and I thought it might be a fun way to provide a little extra stimulation and entertainment.
Unfortunately, he didn’t show much interest in it. However, I honestly think that may have had more to do with his age than the toy itself.
The surprise was my kitten. She absolutely loved it and spent quite a bit of time chasing, batting, and interacting with it. Once she figured out that touching it would make it move, it really seemed to hold her attention.
I mainly used the passive mode, where the toy only moves after being touched. I liked this setting because it felt less overwhelming and encouraged interaction without constantly running around on its own.
Based on my experience, I think this toy is best suited for younger, curious pets that enjoy investigating moving objects. While it wasn’t a hit with my senior dog, it was definitely a success with my kitten.
Overall, it seems well made, easy to use, and a fun option for playful pets.
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Reviewed in the United States on June 8, 2026
★★★★★ 5
Tough
Size: Large, Color: Bone-Blue
Somewhat large and a bit heavy. Best for a large dog. Very tough and durable.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Durable for big dogs
Size: Large, Color: Ball-Red
It has a squeaky inside very tough doors loved it.
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Reviewed in the United States on May 24, 2026
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