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Your cart is empty. BOJACK 10 Values TIP Series Assortment Kit
Specifications:
Product Name: Darlington transistors
Package type: TO-220
Transistor polarity: NPN/PNP
Number of pins: 3
Operating temperature：-65°C - +150°C
Surface mount device: Through hole mounting
Package Quantity:50 Pcs (Each model 5 pcs)
Package Included:
NPN:
5 Pcs-------TIP31C-----------3A/100V
5 Pcs-------TIP41C-----------6A/100V
5 Pcs-------TIP120-----------5A/60V
5 Pcs-------TIP121-----------5A/80V
5 Pcs-------TIP122-----------5A/100V
PNP:
5 Pcs-------TIP32C------------3A/100V
5 Pcs-------TIP42C------------6A/100V
5 Pcs-------TIP125------------5A/60V
5 Pcs-------TIP126------------5A/80V
5 Pcs-------TIP127------------5A/100V
Compliant with lead-free environmental protection
Jerry Davis
August 22, 2025
If you like designing, building, or working on medium power audio amplifiers or power supplies, this is a nice kit to have in your parts inventory.The product description and box label refers to these as "Darlington" types but the first four on the left are standard bipolar transistors. The six on the right are Darlington transistors.The plastic box they are stored in is a little bit larger than an Altoids tin. That keeps things organized in the shop without taking up a lot of space. Just be careful you don't lose them in the clutter :) A label in the lid contains a key for each part number on both the inside and outside. Nice touch!My kit came with three NPN-PNP complementary families:TIP31/32TIP41/42TIP120/121/122/125/126/127The big difference between these is max collector current and max CE voltage.The standard bipolar transistors (TIP31/32/41/42) were marked Fairchild Semiconductor as the manufacturer. All others were marked STMicroelectronics.A lot has been said recently regarding counterfeit semiconductors from China, particularly with respect to power transistors. Although I personally think that the risk is sometimes exaggerated, enough professionals have raised concern about the problem that I felt some testing on the parts I received was warranted.The voltages obtained from a simple diode check on all standard and Darlington transistors were consistent for each part number.I picked one sample from each family (one NPN and one PNP) and downloaded the data sheet from each manufacturer.* My transistor sample matched the mechanical specifications for each manufacturer.* hFE exceeded the manufacturers minimum specification for the indicated Ic and Vce. Darlington hFE was >2500 at Ic=1A and Vce=3V for all samples. This matched a TIP 120/121 pair manufactured by ST that I bought from Mouser a few years ago.* I could only test CE breakdown for the TIP120/125 due to power supply limitations but those fell in the mid 60s for the two I tested. The same with my Mouser pair from ST.* A DC SOA test for the Darlington samples mounted on a heat sink and Ic=1A and Vce=20V achieved thermal equilibrium just under the calculated 100 DegC operating temperature within 3 minutes and ran for 15 minutes without failure.If these parts are counterfeits then someone has gone to a lot of trouble to make these look and work exactly the same as the labeled manufacturer. I know that the counterfeit/clone/fake/whatever problem is far more complicated then I've discussed here. But I choose to trust the seller that these parts are what they claim to be.I think this kit is a great value and I'm looking forward to using them in some new designs for my own personal use.
SeaBass
August 3, 2025
As an Amateur Radio Operator and kit builder, I keep a stock of thousands of components of all varieties (IC's, Resistors, Diodes, Caps, inductors), not just the generic types but every sub-type from Zenor diodes to wire-wound and cement resistors. Except for a few specialized RF components, ALL came from Bojack parts kits.Why Bojack:1. There parts kits include the most commonly used components. Many other vendors stuff their boxes with lower-priced oddball components values that will NEVER be used. Bojack kits always seem to have all the parts values when building parts lists. Nothing is more frustrating than having a box of 1000 transistors, yet the ones you need are never included. Bojack saves me time and money2. Quality Parts -- Yes, I realize that many Amazon Vendors use the same parts suppliers. For resistors and diode, the suppliers are pretty equal, but things go south quick when it comes to logic circuits and MOSFET devices... The Bojack sourced IC's are good quality, I am yet to have a failure. The Bojack sourced ICs types I have used include 555 timers, Voltage regulators, and all types of Op-Amps. I can't vouch for the MTBF long-term, but some have been in continuous use for a year with zero problems.3. Good Packaging: Most components come in hard plastic sectioned cases. Tape-fed components like resistors come pre-bagged and in a non-sectioned case. All components, regardless of type are well-marked both on the interior packaging and on the outside of the case. Some sellers I have purchased from are missing the exterior marking, interior, or both. Does this matter, maybe not if you plan on using all the parts the same day, but have fun months later sorting tiny components with a magnifying glass while trying to read poorly made blurry component markings. Just to be transparent - I do move my components into my own bin with my own inventory system, with thousands of components it's necessary, but if you keep a small bench stock the Bojack cases and reference sheets provide a ready-made parts storage system.4. If you think that I am provided any "free samples" for this review think again. Feel free to check my other reviews, I am BRUTAL on products or services that are less than quality. Is Bojack really that good, try for yourself; I'm sure they have flaws like all sellers, but until I experience otherwise they have my continued business.
WLS
July 15, 2025
Good selection and quality of components.
1962dawn
July 12, 2025
The quantity and quality is great. I’m a hobbyist and use them on some of my projects.
P. Bradley
May 3, 2025
Covered all the bases in power transistors. New cars come with very frail drivers for things like turn signal lamps. So if you wish to add anything better use these to interface additional lamps.
Bill A.
April 29, 2025
Good quality parts, a mix of PNP and NPN Darlington transistors.Fixed a solenoid driver in a Williams pinball machine.
Gayla Peterson
March 10, 2025
My specific application was the circuit board on one of the nice ice makers that’s all the craze these days. Since the manufacturer does not even sell the oem parts, replacing the whole board was not an option. After some careful multimeter testing I found the one transistor that had gone bad and soldered one in from this set in its place. Now it works perfectly!! Saved me a lot of money
Reggie Terry Sr.
March 5, 2025
Nice selection
henri
February 20, 2025
Used a few of them. Operates as stated.
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