PNP Transistors and NPN/PNP Assortment Kits

Compare PNP bipolar junction transistors (BJTs) in through-hole and surface-mount packages, including single-model packs, complementary NPN/PNP pairs and multi-value assortments. This collection also contains shared listings with NPN transistors and other semiconductor choices. The selected model and variant determine what you receive; a PNP keyword in a shared title does not make every option a PNP BJT.

Choose the right type of PNP transistor

• Small-signal through-hole: options include 2N2907/2N2907A, 2N3906, 2N5401, BC327, BC557, BC560C, 2SA1015, S8550 and S9015 in listings that describe TO-92 packages. Gain suffixes such as BC557C or BC327B identify specific selections; do not assume that different suffixes are interchangeable.
• Surface-mount: listings include MMBT3906, MMBT4403, MMBT5401, BC807-25/BC807-40, BC856B, BC857A/B/C, 2SA1015 and S8550/SS8550 in SOT-23, plus PMBT2907A and other SOT-23 or SOT-323 models. PZT2907A is listed in SOT-223; other PNP choices include SOT-89 and TO-252. Match package dimensions, footprint and terminal assignment rather than selecting by polarity alone.
• Power and complementary pairs: listings include BD140 and 2SB772 in TO-126 or SOT-89, TIP32C/TIP36C, MJD44H11G, and MJ15025/MJ15024-family TO-3 choices. Pair options such as BC547/BC557, 2N5551/2N5401, BD139/BD140 and BC550C/BC560C mix NPN and PNP devices. Check whether a listing supplies one model, both models, or a specified number of each. A complementary pair is not automatically a matched pair for gain or thermal behavior.
• Assortment boxes: 24-value, 480-piece TO-92 kits, 10-value 100-piece packs and other mixed sets include multiple NPN and PNP part numbers. One 20-value, 400-piece kit description also lists 2N7000 MOSFETs. Confirm each kit's model breakdown and counts; a pack total is not a count of PNP transistors alone.

Important boundaries in this collection

Some included listings offer NPN-only variants such as 2N3055, 2SD882 or 2SD669A, or unrelated 2N7000 MOSFET, IGBT, BAV70 diode, LM317/78L05 regulator and light-sensitive GL-series element choices. A photodetector or photoresistor listing should not be treated as a general-purpose PNP switching transistor. TIP-series and TO-3 menus may also offer Darlington devices; their base-drive and voltage behavior differ from a conventional single BJT. Model numbers, component markings and claimed electrical ratings in seller titles can be inconsistent, so verify the exact chosen device against its own datasheet.

Selection checklist

1. Confirm whether the selected part is a PNP BJT, an NPN BJT, a Darlington, a MOSFET, an IGBT or another component. For a PNP design, match the full device number and gain group rather than relying on the collection name.
2. Compare manufacturer documentation for collector-emitter voltage, collector current, gain at the intended operating point, saturation behavior, power dissipation, thermal limits, safe operating area where applicable, pinout and package. Even similarly named TO-92 and SOT-23 versions may require a different board footprint and terminal order.
3. Read every option value and quantity. “Color” often selects a model or pack size; options such as 10, 30, 50, 100 or 3,000 pieces and paired packs represent different purchases. Where a seller headline disagrees with a model or type description, do not assume the headline is authoritative; check the selected listing and device documentation.

Frequently asked questions

Is a PNP transistor interchangeable with an NPN transistor?

No. They have opposite polarity and require an appropriate circuit design. A complementary listing offers separate part numbers, not interchangeable versions of the same transistor.

Are 2N3906 and MMBT3906 the same physical package?

No. Listings here describe 2N3906 as TO-92 and MMBT3906 as SOT-23. Verify the exact manufacturer's electrical specifications and pin assignments before adapting a design.

Does an NPN/PNP kit contain equal quantities of each polarity?

Not necessarily. Check the model-by-model contents: some listings are 25 plus 25 pairs, while multi-value boxes provide different part lists. A 480-piece total alone does not establish the NPN/PNP split.

Can I use a part marked as PNP in the product headline without checking the variant?

No. Shared product pages here include NPN-only options and non-BJT parts. Check the selected part number, package and datasheet before purchasing.