2N2222
Single Bipolar Transistors Manufacturer:
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2N2222
276-2N2222
TRANS NPN 30V 0.6A TO18
2N2222 Description
2N2222 Transistor Introduction
The 2N2222 is one of the most commonly used general-purpose NPN bipolar junction transistors (BJT). Known for its high-speed switching and amplification capabilities, the 2N2222 is a popular choice in hobbyist circuits, prototyping, and educational applications. Originally introduced in the metal TO-18 package, this transistor remains widely referenced in electronics tutorials and DIY projects.
2N2222 Datasheet Download
Key Features of 2N2222
- Transistor Type: NPN
- Maximum Collector Current: 600mA
- Collector-Emitter Voltage: 30V
- DC Current Gain (hFE): 100 min @ 150mA, 10V
- Transition Frequency: 250 MHz
- Low Collector Cutoff Current: 10nA
- Compact TO-18 metal can package
- Ideal for amplification and switching applications
2N2222 Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Series | - |
| Packaging | Tube |
| Part Status | Obsolete |
| Transistor Type | NPN |
| Collector Current (Ic) | 600 mA |
| Collector-Emitter Breakdown Voltage | 30 V |
| Vce Saturation | 1.6V @ 50mA, 500mA |
| Collector Cutoff Current | 10nA (ICBO) |
| DC Current Gain (hFE) | 100 @ 150mA, 10V |
| Power Dissipation | 500 mW |
| Transition Frequency | 250 MHz |
| Operating Temperature | -55°C ~ 175°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | TO-206AA (TO-18) |
| Supplier Device Package | TO-18 |
Typical Applications of 2N2222
- Switching Circuits: Ideal for controlling LEDs, relays, and logic level devices.
- Signal Amplification: Used in small signal audio and RF amplifiers.
- DIY Projects: Frequently used in Arduino and Raspberry Pi projects.
- Education: Widely adopted in electronics training kits and lab demonstrations.
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Frequently Asked Questions (FAQ)
Is 2N2222 NPN or PNP?
2N2222 is an NPN-type bipolar junction transistor.
What is a suitable replacement for 2N2222?
You can use PN2222A, BC337, or S8050 as equivalents based on your circuit requirements.
Can 2N2222 drive a relay?
Yes, it can drive small relays typically requiring < 500mA. Use a base resistor for proper operation.
Is 2N2222 still manufactured?
The original TO-18 version is obsolete, but equivalent versions (like PN2222A in TO-92) are still produced.
Conclusion
The 2N2222 transistor remains a classic and reliable component for many low-power switching and amplification tasks. Despite being marked as obsolete in some versions, its equivalents ensure continued use across educational, prototyping, and light-duty applications. Engineers and hobbyists continue to rely on it due to its availability and documented performance.
Technical specifications
| Operating Temperature | 175°C (TJ) | |
| Frequency - Transition | 250MHz | |
| Current - Collector (Ic) (Max) | 600 mA | |
| Vce Saturation (Max) @ Ib, Ic | 1.6V @ 50mA, 500mA | |
| ECCN | EAR99 | |
| Mounting Type | Through Hole | |
| Product Status | Obsolete | |
| Voltage - Collector Emitter Breakdown (Max) | 30 V | |
| Supplier Device Package | TO-18 | |
| Series | - | |
| Transistor Type | NPN | |
| Package / Case | TO-206AA, TO-18-3 Metal Can | |
| Power - Max | 500 mW | |
| REACH Status | REACH Unaffected | |
| Mfr | STMicroelectronics | |
| Current - Collector Cutoff (Max) | 10nA (ICBO) | |
| HTSUS | 8541.21.0075 | |
| Package | Tube | |
| RoHS Status | ROHS3 Compliant | |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 100 @ 150mA, 10V | |
| Base Product Number | 2N22 | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
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