Free Transistor Datasheets and Equivalents
7,500+ BJT and FET parts, each with a full spec table, manufacturer datasheet, and pinout diagram. Works on any device. No account needed.
Articles & Pinout Guides
Component Directories
Field-Effect Transistors (FETs)
Single FETs, MOSFETs
Browse our complete collection of standard single-channel MOSFETs.
Browse by Feature / Use-Case
MOSFET Arrays & Dual FETs
Compact multi-channel chips including Dual N/P-Channel packages.
Browse by Feature / Use-Case
Browse by Popular Package
- DFN N-Channel Array 111 Parts
- SOT-363 N-Channel Array 79 Parts
- SOIC N-Channel Array 52 Parts
- SOP-8 N-Channel Array 44 Parts
- DFN Dual N/P-Channel 41 Parts
- SOP-8 P-Channel Array 29 Parts
- SOP-8 Dual N/P-Channel 28 Parts
- DFN P-Channel Array 23 Parts
- SOT-363 Dual N/P-Channel 22 Parts
- SOT-363 P-Channel Array 22 Parts
- SOIC P-Channel Array 21 Parts
- SC-70 N-Channel Array 17 Parts
- SOT-23-6 Dual N/P-Channel 16 Parts
- SOIC Dual N/P-Channel 13 Parts
- SOT-23-6 N-Channel Array 12 Parts
- SC-70 P-Channel Array 10 Parts
- SOT-23-6 P-Channel Array 9 Parts
- SC-70 Dual N/P-Channel 8 Parts
Bipolar Junction Transistors (BJTs)
BJT Packages Directory
Browse our complete collection of NPN and PNP bipolar junction transistors.
Browse by Feature / Use-Case
- NPN Bipolar Transistors 2160 Parts
- High-Frequency NPN BJTs 1531 Parts
- PNP Bipolar Transistors 1345 Parts
- High-Frequency PNP BJTs 918 Parts
- High-Power NPN BJTs 728 Parts
- High-Power PNP BJTs 448 Parts
- High-Voltage NPN BJTs 248 Parts
- High-Voltage PNP BJTs 117 Parts
- NPN+PNP Dual Bipolar Transistors 47 Parts
Browse by Popular Package
- SOT-23 NPN BJTs 878 Parts
- SOT-23 PNP BJTs 571 Parts
- SOT-89 NPN BJTs 237 Parts
- SOT-89 PNP BJTs 178 Parts
- SOT-323 NPN BJTs 153 Parts
- SOT-223 NPN BJTs 150 Parts
- TO-92 NPN BJTs 138 Parts
- High-Voltage PNP BJTs 117 Parts
- SOT-223 PNP BJTs 109 Parts
- TO-220 NPN BJTs 106 Parts
- TO-252 NPN BJTs 96 Parts
- TO-92 PNP BJTs 84 Parts
- SOT-323 PNP BJTs 79 Parts
- SOT-363 PNP BJTs 37 Parts
- TO-252 PNP BJTs 58 Parts
- SOT-363 NPN BJTs 52 Parts
- TO-220 PNP BJTs 50 Parts
- TO-126 NPN BJTs 39 Parts
- TO-126 PNP BJTs 16 Parts
Frequently Asked Questions
Why did you build TransistorDatabase?
Most transistor lookup tools online are slow, cluttered with ads, or require an account just to view a datasheet. TransistorDatabase was built so engineers and hobbyists can look up parts, download datasheets, and find equivalent substitutes quickly, on any device, without any of that friction.
What does TransistorDatabase contain?
Over 7,500 BJT and FET transistor pages. Each part page includes a full specifications table, a direct link to the manufacturer datasheet PDF, and a buy link for convenience. There are no affiliate arrangements. The buy link is just there to save you a separate search.
Is TransistorDatabase free to use?
Yes, completely free. No account, no login, no paywalled specs, no premium tier.
Are the buy links affiliated?
No. TransistorDatabase has no affiliate relationships. The links are purely there for your convenience.
What is the Transistor Equivalent Finder?
Finding parts is easy. You can use the main search box at the top of the page to instantly look up any specific transistor's datasheet and specs. If you need a drop-in substitute, click here to use our Transistor Equivalent Finder Tool, which lets you filter compatible replacements by Vceo, Ic, and package type.
Does the site work on mobile?
Yes. The search, spec tables, and equivalent finder are all built to work on phones and tablets without any compromise.
How often is the database updated?
The database is refreshed every three months with new parts, updated specs, and verified content.