# Transistors Handbook

> Comprehensive transistor database for electronics design and selection. (iPhone/iPad app by Centro Studi Informatica di Danilo Priore.)

- Source: https://appshunter.io/ios/app/transistors-handbook/id474379633 (this page in markdown: same URL + `.md`)
- Developer: [Centro Studi Informatica di Danilo Priore](https://appshunter.io/developer/409935887)
- Category: Education, Reference
- Price: $3.99
- Rating: 4.00/5 from 22 App Store ratings · 11 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.4 · 22 MB
- Languages: American English
- Released: 2011-10-26
- Data updated: 2026-06-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/transistors-handbook/id474379633/reviews.md

## What is Transistors Handbook?

Transistors Handbook - Your Transistor Guide.

This app will guide you to know, choose, select and design your next board masterpiece using that transistor you weren’t remembering.

With this app you can update the transistor informations and share it with other app users.

What is a transistor? (from Wikipedia): 
“A transistor is a semiconductor device used to amplify and switch electronic signals and power. It is composed of a semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be much more than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits.”

The transistor is the fundamental building block of modern electronic devices, and is ubiquitous in modern electronic systems. Following its release in the early 1950s the transistor revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, and computers, among other things.”

With Transistors Handbook you will se the design, the kind and all the aspects of more than 51.000 transistors, the application will provide the following info:
- Kind
- Graphical Schema
- Code
- Type
- Material
- Power
- VCB
- VCE
- VEB
- LC
- FT
- HFE
- Note of the Transistor
- Similar
- Online Datasheet

You can also use the embedded search engine to search a transistor for its name or power.

The coverage of the transistors is about the complete catalogue of the Silicon and Germanium. 

The series included are:, PNP and NPN, series 10 ~ 12, 14 ~ 19, 25 ~ 28, 2A ~ 2D, 2G, 2H, 2N, 2P, 2S, 2T, 30, 35, 37, 38, 3N, 3O, 3S, 3T, 40 ~ 43, 45, 4N, 50, 52, 55, 56, 5N, 60, 63, 6N, 71 ~ 74, 7N, 80, 81, 85, 90, 92, 94, A1, A5, A7, A8, AC, AD, AF, AJ ~ AM, AP, AR ~ AW, BC ~ BF, BJ, BL, BN, BP, BR ~ BV, C0 ~ C9, CA ~ CE, CG ~ CN, CP ~ CV, CX, D1 ~ D8, DA ~ DD, DH, DJ, DK, DM, DN, DP ~ DT, DW, DX, DZ, E1 ~ E3, E5 ~ E7, EA, EC, ED, EF, EJ, EL ~ EN, EQ ~ ET, EW, F1 ~ F5, FA ~ FH, FJ, FK, FM ~ FQ, FS, FT, FV, FX, FZ, G2, G6, GA ~ GF, GI, GM, GP, GS, GT, HA ~ HF, HK, HL, HN, HP, HS, HT, HV, HX, ID, IM, IN, IR, IT, J2, J4, J6, JA, JC, JE, JF, JO, K2, K4, K9, KD ~ KG, KM ~ KP, KR ~ KU, L4, L5, LB, LD, LI, LJ, LL ~ LP, LT, LX, M1, M2, MA ~ MH, MJ, MM ~ MU, MX, MZ, NA ~ NC, NJ, NK, NM, NP, NR ~ NT, NX, NZ, OC, OD, P2 ~ P4, P6, P7, P9, PB ~ PE, PH ~ PO, PR ~ PU, PX, PZ, Q, Q5, R3, R5, R7 ~ R9, RC, RE, RJ, RS, RT, RV, S0 ~ S2, S4 ~ S9, SA, SC ~ SH, SK, SM, SN, SP, SQ, SS, ST, SV, SX, SY, T0 ~ T3, TA, TB, TD ~ TF, TI, TK ~ TN, TP, TR, TS, TV, U2, UC, UM, UN, UP, V1, V2, V4, V7, W2, WT, XA ~ XC, XP, XQ, XS, ZB, ZD, ZG, ZH, ZT, ZU, ZX, with volts, frequencies, power, HFE (gain), similar transistors and pin design.

The list may not be exhaustive, if you find any transistor missing, let us know.

*** Don't forget to check also our Mosfet Handbook application. The perfect companion of Transistors Handbook.

## Key features

- Database of over 51,000 transistors
- Detailed transistor specifications
- Graphical schema and code information
- Search by name or power
- Online datasheet access
- Information on Silicon and Germanium transistors

## Recent user reviews (10 of 11)

All indexed reviews: https://appshunter.io/ios/app/transistors-handbook/id474379633/reviews.md

### 4/5 — Not perfect but very handy!

*2022-01-02*

Very handy when trying to identify substitutions for obsolete and hard-to-find BJTs.

### 1/5 — Las versión don’t work on iOS 12.4.9

*2020-12-30*

Las versión don’t work on iOS 12.4.9

**Developer response:** sorry for the inconvenience, the latest version now also works on devices with iOS 12 and 13

### 1/5 — The annoying advertisements are back on it

*2020-12-26*

The annoying advertisements are back on it

### 2/5 — Not sure

*2017-09-01*

Bought this app and when I start the app I am notified that there are 9 updates. I select update and the app tells me I have no internet. Yet I am able to write a review with the same internet. Hmm...

### 5/5 — This app is a timesaver!

*2017-02-25, version 1.7*

This app is a time saver!  I was exactly what I needed- a one stop source of data on various transistors. Please note that I'm new to electronics and found myself looking for Russian GE transistors on eBay.  I new the HFE range I was looking for and this app gave me the data.  
I don't like the pop up adds which interfere once in a while.  Please know that I would gladly pay for this app because it is a great resource to any electronics enthusiast.

Thank you to the app builder for all the research time you must have put into this app.

### 1/5 — Junk

*2015-11-27*

Constant crashing in search mode. Website has no way to contact publisher. Forget Report a problem. No way to report.

### 3/5 — Transistor

*2015-06-16, version 1.3*

Nice app 
Is it possible to save your favourite transistor searches ?

### 3/5 — Good but...

*2013-03-14*

Good info but nowhere to correct wrong data - BC546B wrong pin out image. Caused me problems

### 3/5 — OK App.

*2012-08-30*

I repair amps and thought this would help. I tried to search for transistors, and it took me a while to figure out what information I needed to get a result. It really does bring up matching numbers if you know what to do. I emailed them through Facebook.

### 1/5 — This is a fake app

*2012-02-11*

I read the front page & buy but when I try to use it ( I am electronics technician  work in a electronics company ) I see there a few uncommon number  ,  when I search I don't  find any common or popular number / series such as 2sa ,2sb.2sc,2sd & in practically this app is use less for nothing I pay this now I think how come I complain to Apple . Apple should be stop this kind app selling  .

## Frequently asked questions about Transistors Handbook

### What kind of transistors does Transistors Handbook cover?

Transistors Handbook covers a vast range of transistors, including PNP and NPN types, across numerous series like 2N, BC, and others. It includes both Silicon and Germanium transistors, aiming for comprehensive catalog coverage.

### What specific information is provided for each transistor?

For each transistor, Transistors Handbook provides its kind, graphical schema, code, type, material, power rating, voltage ratings (VCB, VCE, VEB), current (LC), frequency (FT), gain (HFE), notes, similar transistors, and links to online datasheets.

### Can I search for transistors by their power rating in Transistors Handbook?

Yes, the embedded search engine in Transistors Handbook allows you to search for transistors not only by their name but also by their power rating, making it easier to find suitable components.

### How frequently is Transistors Handbook updated?

The latest version of Transistors Handbook is 1.10.6, which was last updated on December 22, 2021. While specific update frequency isn't detailed, this indicates it receives periodic maintenance.

### What devices is Transistors Handbook available on?

Transistors Handbook is available on iPhone, iPad, and iPod. It is designed for users who need quick access to transistor data on their mobile devices.

### What is the age rating for Transistors Handbook?

Transistors Handbook has an age rating of 4+. This suggests it is suitable for a wide audience, including younger learners interested in electronics.

### Does Transistors Handbook have ads?

No, Transistors Handbook does not contain advertisements. As a paid application, it offers an uninterrupted user experience focused on its educational content.

### What is the price of Transistors Handbook?

Transistors Handbook is a paid application priced at $3.99. This one-time purchase grants access to its extensive transistor database and features.

## Version history (last 5 releases)

### 1.10.6 — 2021-12-22

minor bug fix

### 1.10.5 — 2021-12-07

Minor bug fix

### 1.10.4 — 2021-12-01

* Privacy modification, no data is collected by this app.

### 1.10.3 — 2021-11-30

* Compatible with iOS 15
* Advertising removed

### 1.10.2 — 2021-01-28

fixes for crash on iOS 12 and iOS 13

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## Related topics

[transistors handbook](https://appshunter.io/ios/topics/transistors-handbook) · [transistor electronic](https://appshunter.io/ios/topics/transistor-electronic) · [transistor](https://appshunter.io/ios/topics/transistor)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*