TIP121 STMicroelectronics Transistor BJT NPN (Transistor Outline, Vertical) In Stock
The TIP121 is an NPN Darlington power transistor from STMicroelectronics rated for 5 A collector current and 80 V collector-emitter voltage, with a minimum DC current gain of 1000. It integrates a built-in diode and resistor and ships in a 3-pin TO-220 package for high-current switching and driver applications.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- TIP121 Datasheet PDF
- Category
- Transistor BJT NPN
- Price
- From $0.1789(MOQ 5)
- Temp Range
- ?°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TIP121?
- 5 A maximum collector current (IC)
- 80 V maximum collector-emitter voltage
- 1000 minimum DC current gain (hFE)
- Built-in base-emitter diode and resistor
- Single NPN Darlington transistor element
- 3-pin TO-220 through-hole power package
What is TIP121 used for?
The TIP121 is well suited for high-current switching applications such as relay and solenoid drivers, DC motor control, and power amplifier output stages that require high current gain from a single low-cost device. Its integrated base resistor and diode simplify driver circuit design in industrial control and general-purpose power switching applications.
What are the specifications of TIP121?
| Factory Lead Time | 14Weeks |
| YTEOL | 9 |
| Collector Current-Max (IC) | 5A |
| Collector-Emitter Voltage-Max | 80V |
| Configuration | DARLINGTON WITH BUILT-IN DIODE AND RESISTOR |
| DC Current Gain-Min (hFE) | 1000 |
| JEDEC-95 Code | TO-220AB |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Polarity/Channel Type | NPN |
| Power Dissipation Ambient-Max | 65W |
| Power Dissipation-Max (Abs) | 65W |
| Qualification Status | Not Qualified |
| Surface Mount | NO |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Transistor Application | SWITCHING |
| Transistor Element Material | SILICON |
| VCEsat-Max | 4V |
| ## TIP121 Alternates Showing results | Image |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.29.00.95 |
| Country of Origin | Mainland China |
Where can I find the TIP121 datasheet?
TIP121 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for TIP121?
Compatible alternatives and drop-in replacements for TIP121:
Frequently Asked Questions
What current gain does the TIP121 Darlington transistor provide?
The TIP121 delivers a minimum DC current gain (hFE) of 1000, allowing it to switch up to 5 A of collector current with a small base drive signal.
How is the TIP121 packaged for power dissipation?
The TIP121 ships in a 3-pin TO-220 through-hole package rated for a maximum collector-emitter voltage of 80 V, supporting heatsink mounting for high-power switching designs.
What lead time applies when sourcing the TIP121?
The TIP121 carries a standard factory lead time of 14 weeks and a 9-year YTEOL rating, with a rated 5 A collector current for continued design-in availability.
Which circuits commonly use the TIP121 for driving inductive loads?
The TIP121's built-in diode and resistor and 1000 minimum hFE make it a common choice for relay, solenoid, and DC motor drivers switching up to 5 A at up to 80 V.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 5+ | $0.6100 | $3.05 |
| 10+ | $0.4700 | $4.70 |
| 100+ | $0.4200 | $42.00 |
| 500+ | $0.3200 | $160.00 |
| 526+ | $0.1911 | $100.52 |
| 1000+ | $0.1789 | $178.90 |
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