Part Details for 2N4123 by Rochester Electronics LLC
Results Overview of 2N4123 by Rochester Electronics LLC
- Distributor Offerings: (0 listings)
- Number of FFF Equivalents: (8 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (10 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
Applications
Consumer Electronics
Audio and Video Systems
2N4123 Information
2N4123 by Rochester Electronics LLC is a Small Signal Bipolar Transistor.
Small Signal Bipolar Transistors are under the broader part category of Transistors.
A transistor is a small semiconductor device used to amplify, control, or create electrical signals. When selecting a transistor, factors such as voltage, current rating, gain, and power dissipation must be considered, with common types. Read more about Transistors on our Transistors part category page.
Part Details for 2N4123
2N4123 CAD Models
2N4123 Part Data Attributes
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2N4123
Rochester Electronics LLC
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Datasheet
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2N4123
Rochester Electronics LLC
Small Signal Bipolar Transistor, 0.2A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-92, PLASTIC, TO-226AA, 3 PIN
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| Pbfree Code | No | |
| Rohs Code | No | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | ROCHESTER ELECTRONICS LLC | |
| Part Package Code | TO-92 | |
| Package Description | PLASTIC, TO-226AA, 3 PIN | |
| Pin Count | 3 | |
| Reach Compliance Code | unknown | |
| ECCN Code | EAR99 | |
| Collector Current-Max (IC) | 0.2 A | |
| Collector-Emitter Voltage-Max | 30 V | |
| Configuration | SINGLE | |
| DC Current Gain-Min (hFE) | 25 | |
| JEDEC-95 Code | TO-92 | |
| JESD-30 Code | O-PBCY-T3 | |
| JESD-609 Code | e0 | |
| Number of Elements | 1 | |
| Number of Terminals | 3 | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Shape | ROUND | |
| Package Style | CYLINDRICAL | |
| Polarity/Channel Type | NPN | |
| Qualification Status | Not Qualified | |
| Surface Mount | NO | |
| Terminal Finish | TIN LEAD | |
| Terminal Form | THROUGH-HOLE | |
| Terminal Position | BOTTOM | |
| Transistor Application | SWITCHING | |
| Transistor Element Material | SILICON | |
| Transition Frequency-Nom (fT) | 250 MHz |
Alternate Parts for 2N4123
This table gives cross-reference parts and alternative options found for 2N4123. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of 2N4123, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
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| 2N4123D27Z | Fairchild Semiconductor Corporation | Check for Price | Small Signal Bipolar Transistor, 0.2A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-92, | 2N4123 vs 2N4123D27Z |
| 2N4123STZ | Zetex / Diodes Inc | Check for Price | Small Signal Bipolar Transistor, 0.2A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-92 STYLE, E-LINE PACKAGE-3 | 2N4123 vs 2N4123STZ |
| 2N4123-BP | Micro Commercial Components | Check for Price | Small Signal Bipolar Transistor, 0.2A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-92, ROHS COMPLIANT, PLASTIC PACKAGE-3 | 2N4123 vs 2N4123-BP |
| 2N4123 | Diodes Incorporated | Check for Price | Small Signal Bipolar Transistor, 0.2A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-92 STYLE, E-LINE PACKAGE-3 | 2N4123 vs 2N4123 |
| 2N4123RLRE | Motorola Mobility LLC | Check for Price | 200mA, 30V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92 | 2N4123 vs 2N4123RLRE |
| 2N4123J05Z | Fairchild Semiconductor Corporation | Check for Price | Small Signal Bipolar Transistor, 0.2A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-92, 3 PIN | 2N4123 vs 2N4123J05Z |
| 2N4123 | Loras Industries Inc | Check for Price | Small Signal Bipolar Transistor, 0.2A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-92, | 2N4123 vs 2N4123 |
| 2N4123STOA | Zetex / Diodes Inc | Check for Price | Small Signal Bipolar Transistor, 0.2A I(C), 30V V(BR)CEO, 1-Element, NPN, Silicon, TO-92 STYLE, E-LINE PACKAGE-3 | 2N4123 vs 2N4123STOA |
2N4123 Frequently Asked Questions (FAQ)
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The recommended operating temperature range for the 2N4123 is -55°C to 150°C, although the datasheet only specifies a range of -55°C to 125°C for certain parameters.
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To ensure the 2N4123 is properly biased for linear operation, you should follow the recommended biasing scheme in the datasheet, which typically involves setting the base-emitter voltage (VBE) to around 0.7V and the collector-emitter voltage (VCE) to around 1-2V. Additionally, you should ensure that the transistor is operated within its recommended current and power dissipation limits.
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The maximum safe operating area (SOA) for the 2N4123 is not explicitly stated in the datasheet, but it can be estimated based on the transistor's maximum ratings and thermal characteristics. As a general rule, the SOA is typically limited by the transistor's maximum collector-emitter voltage, collector current, and power dissipation.
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Yes, the 2N4123 can be used as a switch, but its switching characteristics are not explicitly stated in the datasheet. However, based on its transistor characteristics, the 2N4123 can switch on and off relatively quickly, with a typical rise and fall time of around 10-50 ns. The transistor's switching frequency is limited by its maximum collector-emitter voltage and collector current.
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To handle ESD protection when working with the 2N4123, you should follow standard ESD handling procedures, such as using an ESD wrist strap or mat, and ensuring that your workspace is ESD-safe. Additionally, you should consider adding ESD protection devices, such as diodes or resistors, to your circuit design to protect the transistor from electrostatic discharge.