BC337 Transistors and TO-92 Assortment Kits
Explore BC337 NPN through-hole transistors alongside BC327 PNP counterparts and TO-92 transistor assortments. This collection includes BC337-25 and BC337-40 model selections, single-model packs, and mixed kits containing multiple NPN and PNP part numbers. A product title mentioning BC337 does not mean every selectable option contains BC337. Check the exact selected model and kit contents before ordering.
What is in this collection?
- BC337 model packs: Selectable BC337, BC337-25 and BC337-40 options appear in TO-92 listings, with quantities varying by product, including 50-, 100- and 1,000-piece model choices. The -25 and -40 suffixes denote gain group selections, not package quantity. Confirm the exact manufacturer datasheet for the part supplied.
- BC327 and other single-model choices: The same menus can offer BC327 or BC327-40 (PNP), BC547/BC548/BC549/BC550 (NPN), BC556/BC557/BC558 (PNP), 2N3904, 2N3906, S8050 and other models. A menu labelled “Color” may actually select the model and quantity. BC327 is a complementary polarity choice, not an alternate spelling of BC337.
- True mixed assortments: Ten-value, 200-piece TO-92 boxes commonly list 20 pieces each of BC337, BC327, 2N2222, 2N2907, 2N3904, 2N3906, S8050, S8550, A1015 and C1815. Other listings offer 10, 15, 18 or 24 values with totals such as 100, 200, 400, 480, 600, 840 or 900 pieces. Contents vary: read the selected variant and its itemized packing list rather than assuming BC337 is included in every assortment.
- Different technologies in shared menus: BC517 is a Darlington transistor, 2N7000 is a MOSFET, TL431A is an adjustable shunt reference, and 78L/79L choices are regulators. They are not BC337 substitutes. Some seller descriptions contradict their own part lists on polarity or package type; use the actual part number and its datasheet to resolve such conflicts.
Choosing a suitable transistor
- Match the complete part number and polarity. BC337 is an NPN BJT, while BC327 is PNP; gain-bin suffixes such as -25 and -40 matter when selecting a replacement.
- Verify TO-92 lead order, body outline and board footprint against the specified manufacturer. A seller's “surface mount” package label on a TO-92 kit does not make it a surface-mount replacement.
- Check collector-emitter voltage, collector current, gain at your operating current, saturation behavior, power dissipation and thermal conditions against the specific datasheet. Do not infer ratings, authenticity or certification from generic marketplace wording.
- Confirm whether the selected option is a single-model pack or a mixed kit and check per-model piece counts. Options labelled “Voltage” may encode kit size, such as “24Values-480pcs,” rather than an electrical voltage rating.
Frequently asked questions
Is BC327 the same as BC337?
No. BC327 is PNP and BC337 is NPN. Compare polarity, pinout and the relevant ratings before designing a complementary pair or replacing a part.
Does a 200-piece kit contain 200 BC337 transistors?
Not when it is a ten-value assortment: a listed 200-piece configuration has 20 pieces of each of ten models, including BC337. A separate 200-piece listing may differ, so inspect the selected configuration.
Does “24Values-480pcs” specify a 24 V rating?
No. It denotes 24 model values and 480 total pieces in those listings. Electrical ratings depend on each component.
Can BC517, TL431A or 2N7000 replace BC337?
Not directly. BC517 is a Darlington BJT, TL431A a shunt reference and 2N7000 a MOSFET; their functions and drive requirements differ.
