Product Overview
Motorola MPS2222A NPN Switching Transistor in a Three-Lead TO-92 Plastic Case
Condition
New. The piece photographed is a plastic TO-92 case with a flat marked face reading MPS2222A over the stylized Motorola M logo and the code 642. The three leads are straight, untrimmed, and evenly spaced, with bright plating and no solder, tinning, or bend marks visible on them. Another photo shows a TO-92 case against bubble wrap from the rounded back, where a small circular mold mark is visible and no part number is legible from that angle. Stock on hand is 86 pieces and only a few were photographed, so treat these images as representative of the lot: the exact piece you receive will not be the exact piece in the photos. The piece photographed carries the Motorola M logo, and with 86 on the shelf we have not put eyes on every one, so the marking may vary from piece to piece.
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Product Overview
The Motorola MPS2222A is a high speed NPN bipolar junction transistor rated 600 mA, 75 V, and 625 mW, with an operating temperature range of -55 C to 150 C. The MPS prefix marks the molded plastic TO-92 version of the long-running 2222A general purpose switching family, the part most benches reach for when a small load needs to be driven from logic level: relay and LED drivers, oscillator and timing stages, level shifters, and low power signal switching. The photographed piece carries its full part number screened directly on the flat face of the case, so the part identifies itself under a loupe long after the bag it came in is gone. Pinout and gain grouping vary across manufacturers within the 2222 family, so match the pinout to your board and verify against the datasheet before use.
Key Features
- Part number: MPS2222A, screened on the flat face of the case
- Type: NPN bipolar junction transistor, high speed switching
- Continuous current: 600 mA
- Voltage rating: 75 V
- Power dissipation: 625 mW
- Operating temperature range: -55 C to 150 C
- Package: three-lead TO-92 plastic case, through-hole, leads straight and untrimmed
- Case marking on the photographed piece: MPS2222A over the stylized Motorola M logo and the code 642
- Stock on hand: 86 pieces, sold in the exact count you order
- Pinout, gain group, and individual parameter limits: not confirmed - verify against the datasheet before use
Applications
- Bench technician driving a small relay or a bank of indicator LEDs from a 5 V logic output
- Restorer replacing a failed general purpose switching transistor on a 1980s control or audio board
- Instructor stocking a teaching lab where every student build needs a common NPN switch on hand
- Hobbyist breadboarding an oscillator, timer, or level shifter that expects a 2222-family part
Frequently Asked Questions
What exactly is printed on the transistor?
The flat face of the photographed piece reads MPS2222A on the first two lines, with the stylized Motorola M logo and the code 642 below it. That marking is legible to the naked eye and sharp under magnification, which matters if you are matching a part on a board against a service manual.
Will I receive the exact transistor shown in the photos?
No. There are 86 pieces in stock and only a few were photographed. The images show what the lot looks like, not the individual piece that goes in your envelope. The case style is consistent across the stock, but do not expect the same date code, the same case marking, or the same scuff pattern as the piece on screen.
Can I drop this in where a 2N2222A is called for?
Electrically the 2222A family covers the same general purpose switching ground, but pinouts differ between the metal-can and plastic versions and between manufacturers of the plastic part. Check the pinout of the board you are working on against the MPS2222A datasheet before you solder anything in.
What is not confirmed on this listing?
The confirmed figures are the ones above: NPN, high speed, 600 mA, 75 V, 625 mW, and -55 C to 150 C operating range. Gain group, individual breakdown voltage parameters, and pinout orientation are not confirmed here. If your design depends on any of those, verify against the datasheet before use.
Why buy four of these here instead of a bag of 100 from a bulk seller?
Because a repair needs the number of transistors the repair needs. With 86 pieces on the shelf you can order one to finish a board, four to keep a spares tin honest, or twenty for a class build, and pay for exactly that count instead of a forced lot that leaves 96 loose transistors rolling around your drawer for the next decade. Shipping is $8 flat rate and free once the order passes $28, and orders leave our Idaho warehouse the same or next business day.
The 2222 has been the default answer to "I just need to switch this thing on" since before most of the boards it now repairs were designed. Pick your count, and let it go back to doing the quiet work it was built for.
