Product Overview
High-speed silicon switching and amplifier transistor - TO-92 through-hole package
Condition
Unused, NOS – New Old Stock. Excellent condition with nothing out of the ordinary noted. Visual inspection OK. Part of our ongoing recovery from legacy electronics supply chains.
Ships same business day. Online since 1999. Honest pricing, real humans.
Product Overview
Motorola MPS2222A is a silicon NPN bipolar junction transistor designed for high-speed switching and general-purpose amplification. Housed in a TO-92 plastic package, it became a standard choice in through-hole manufacturing for control, driver, and signal stages. The "A" suffix denotes the higher voltage-rated version within the 2222 family. Specifications referenced here are based on documented Motorola data for this part number.
Key Features
- Brand: Motorola
- Part number: MPS2222A
- Transistor type: NPN silicon BJT
- Package: TO-92 plastic
- Collector-Emitter Voltage (VCEO): 40V maximum
- Collector-Base Voltage (VCBO): 75V maximum
- Continuous Collector Current (IC): 600mA
- Total Device Dissipation (PD): 625mW at 25°C
- Transition Frequency (fT): 300MHz minimum
- Derating factor: 5.0 mW/°C above 25°C
Applications
- Relay, solenoid, and small motor switching
- LED arrays and lamp drivers within rated limits
- PWM control circuits and saturated switch designs
- General-purpose signal amplification stages
- VHF oscillators and low-power RF circuits
- Repair and restoration of vintage through-hole electronics
Frequently Asked Questions
Is this the higher-voltage "A" version?
Yes. The MPS2222A version carries a 40V collector-emitter rating, higher than earlier non-A variants in the 2222 family.
What package is it in?
This transistor is supplied in a TO-92 plastic package intended for through-hole PCB mounting.
What is the typical pinout?
For Motorola MPS2222A, the standard pin configuration when viewing the flat side with leads down is E-B-C (Emitter, Base, Collector). Always confirm orientation before installation.
Can it handle 600mA continuously?
The rated continuous collector current is 600mA. Designers should account for power dissipation and thermal derating above 25°C to stay within safe operating limits.
Is this suitable for low-noise preamp use?
It is designed as a general-purpose switching and amplifier transistor. For very low-level, low-noise signal stages, engineers often select dedicated low-noise transistors instead.
A familiar part number with the Motorola mark behind it. For builders keeping classic through-hole designs alive, this is one of the small pieces that keeps circuits honest.
