The P2N2222 has a different order of pins than the metal case 2N2222 /a/NWzig8i, with its emitter and collector connections switched other plastic-case transistors also have different pinouts. – tlfong01 Nov 9 at 7:32
4I also googled Wikipedia for the pin order difference: 2N2222 Wikipedia en./wiki/2N2222 Note: Replacements for the 2N2222 are commonly available in the cheaper TO-92 packaging, where it is known as the PN2222 or P2N2222, which has similar specifications except for the lower maximum collector current. 2Before testing, I am googling a datasheet: P2N2222A Amplifier Transistors NPN Silicon datasheet – OnSemi 2003jan /pdf/datasheet/p2n2222a-d.pdf – tlfong01 Nov 9 at 6:29. Perhaps I would do some destructive testing. 2Just now I searched my junk box and found some 500 pieces of TaoBao no brand 2N2222. I usually buy from TaoBao (AliExpress), and sometimes from Element14 (Farnell) – tlfong01 Nov 9 at 6:07 Well, I very seldom buy from eBay, never from Digidkey. Don’t buy electronic components from Ebay, Aliexpress and similar scammer communities. – Lundin Nov 8 at 15:50 “from eBay or DigiKey?” Err, that’s like saying “only trust parts either found on some junkyard or by the well-known vendor Digikey”. 1Does the label list a manufacturer? – mkeith Nov 5 at 17:12. I just connected the Rb to the ground to ensure that the transistor is off. – John Jin Nov 4 at 4:06 
I bought my transistor from markets in Shenzhen. As I checked the transistor, it works fine up to 15 as VCC, but after that, the transistor gets turned on, and it starts burning at 22V. My transistor starts burning after turning on the power supply.
3(1) Are your 2N2222 actually 2N2222A, from eBay or DigiKey? (2) Why Rb connected to ground? (3) Do you have any project/testing spec? – tlfong01 Nov 3 at 11:35. 3Immediately fail, or fail after a specific period or number of operations? Is that a switch on the transistor base? – HandyHowie Nov 3 at 11:09. 
I just assembled them on the breadboard, and the power supply is a variable linear 0-30 volt 3A power supply(MEGATEK-MP-3003). – John Jin Nov 3 at 10:19
2You need to provide more details like PCB layout, full schematic, photographs, power supply type and surge resilience, anti-static precautions in place and used etc. – Andy aka Nov 3 at 9:49. I just connected the RBRB to the ground to ensure that the transistor is off. As I checked the transistor, it works fine up to 15 V15 V as VCC, but after that, the transistor gets turned on, and it starts burning at 22 V22 V. However, in the lab, I’ve seen different 2N2222s fail (get turned on) and burn with the below circuit. ( Leave a comment ) 2N2222 burning out in the lab at 22 VĪccording to the datasheet, a 2N2222 can handle VCE(max)VCE(max) up to 40 V40 V.
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