Product Overview
Motorola MPS2222A 40V 600mA Small-Signal BJT Switching Transistor
Condition
Unused new old stock (NOS). Clean, straight through-hole leads with legible body markings: MPS2 222A M538. Visual inspection confirmed complete leads and intact plastic encapsulation.
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Product Overview
The Motorola MPS2222A is a classic silicon NPN small-signal bipolar junction transistor housed in a standard TO-92 through-hole package. Built for high-speed switching and general-purpose audio and RF amplification, it provides dependable driver performance with a 40V collector-emitter breakdown rating and up to 600mA continuous collector current.
Key Features
- NPN silicon bipolar junction transistor (BJT)
- TO-92 through-hole package with standard Style 1 pinout (Emitter, Base, Collector)
- 40Vdc collector-emitter breakdown voltage (VCEO)
- 75Vdc collector-base breakdown voltage (VCBO)
- 600mAdc continuous collector current (IC)
- 300MHz transition frequency (fT) with 625mW power dissipation
Applications
- Direct switching for 5V and 12V relays, solenoids, indicator lamps, and low-power DC motors
- Audio preamplification stages, sensor signal conditioning, and pulse-width modulation drivers
- Through-hole bench prototypes, microcontroller level shifting, and vintage synthesizer restoration
Frequently Asked Questions
What is the pinout configuration for this TO-92 transistor?
With the flat marked face pointed toward you and the leads directed downward, the pin arrangement from left to right is Pin 1 (Emitter), Pin 2 (Base), and Pin 3 (Collector).
What are the maximum voltage and current limits?
Maximum continuous collector current is 600mA, maximum collector-emitter voltage (VCEO) is 40Vdc, and maximum collector-base voltage (VCBO) is 75Vdc.
Why buy individual pieces instead of a bulk surplus lot?
Sourcing individual pieces allows you to purchase the exact count needed for breadboarding, circuit repairs, or low-volume builds without storing unused surplus. More pieces cost less each, and the price-break table on this page shows what each quantity costs. Orders ship for an $8 flat rate, ship free over $28, and depart our Idaho warehouse the same or next business day.
The 2222 has driven relays, bounced clock signals, and bailed out bench experiments across half a century of electronics. Pop it into the board, bias the base, and let a classic piece of silicon get back to work.
