Are the 2n2907 transistors from this kit pnp or npn? i believe 2907 are pnp, yet the online product description and the label from the kit say npn.

You're correct, the 2n2907s in this kit test as high-gain PNP, although the kit mislabels them as NPN.

For the 2n3904 npn 60v 0.2a - this would be 12 watts, why does the spec say 0.625 watts? i need to power a circuit drawing 5volts but at 0.3a

The listings on of 60V and 0.2A are maximums that you do not exceed and must be ratio'd so as not to exceed 0.625W (also a maximum). Bottom line, 0.3A exceeds the collector max; therefore, this transistor should not be used for a continuous 0.3A current. Find another transistor that meets you specs.

What is the amplifier factor or current gain?

This is a transistor assortment, lots of different gains and current handling properties. Try looking at the spec sheet for each transistor listed for their specifications - it is out there, just gotta look.

Why is 2n2907 labeled on the box, and described intermittently here, as an npn transistor when it's pnp by industry standard?

Purely and simply, this is a mis-label (a mistake) by the company labeling these transistor. When I got my box of transistors I re-labeled them with the correct data.

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BOJACK 10 Values 250 Pcs A1015 BC327 BC337 C1815 S8050 S8550 2N2222 2N2907 2N3904 2N3906 PNP NPN Power General Purpose Transistors Assortment Kit

Product ID: 145333358

🔄10 versatile transistor models included

🔋250 pcs total for extensive projects

🗃️Re-sealable rugged storage case

€ 22.91

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your projects with the ultimate transistor arsenal!

MASSIVE 250 PIECE KIT - Stock up with 25 pieces per model—never run out mid-project.
DURABLE RE SEALABLE CASE - Keep your components organized and protected on the go.
TOP RATED QUALITY RELIABILITY - 4.7-star rating from 786+ engineers and makers worldwide.
COMPREHENSIVE 10 VALUE ASSORTMENT - Cover all your PNP & NPN transistor needs with 10 essential models.
PERFECT FOR PROTOTYPING REPAIRS - Ideal for professional managers and makers who demand versatility and performance.

The BOJACK 10 Values 250 Pcs Transistor Assortment Kit offers a professional-grade selection of PNP and NPN power transistors, featuring 10 popular models with 25 pieces each. Packaged in a rugged, re-sealable plastic case, this kit is designed for engineers, makers, and tech managers who need reliable, versatile components for prototyping, repairs, and production. Highly rated and trusted, it’s a must-have for anyone serious about electronics.

Specifications

ASIN	B07T61SY9Y
Best Sellers Rank	#8,731 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in BJT Transistors
Brand Name	BOJACK
Customer Reviews	4.7 4.7 out of 5 stars (786)
Manufacturer	BOJACK
Material Type	Plastic
Model	BJ-TR10
Part Number	BJ-TR10
UPC	768894138925

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