TIP121 The On Semiconductor TIP121 is an NPN Epitaxial Darlington Transistor designed for medium power linear switching applications. It features a 80V collector-emitter voltage and a 5A collector current.
Mfr Part #:

TIP121

Available from 4 distributors
Mfr Name: On Semiconductor
On Semiconductor
The On Semiconductor TIP121 is an NPN Epitaxial Darlington Transistor designed for medium power linear switching applications. It features a 80V collector-emitter voltage and a 5A collector current.
Total Stock: 4,054 pcs
$ Price Range: $0.51

TIP121 Available from 4 distributors

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Non-Authorised

TIP121 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Automotive Grade
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
Industrial Grade
Lead Style
Military Grade
Mounting Type
Operating Temperature
Power
Power Dissipation (@ TC = 25 °C)
SVHC Present
Storage Temperature
Supplier Device Package
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage

TIP121 Description

Short technical summary and product information.

The TIP121 from On Semiconductor is an NPN Epitaxial Darlington Transistor suitable for medium power linear switching applications. This component offers a collector-emitter voltage (VCEO) of 80V and a continuous collector current (IC) of 5A.

 

Key electrical characteristics include a DC current gain (hFE) of 1000 at 3A and a collector-emitter saturation voltage (Vce(sat)) of 4V at 5A. The transistor is designed to operate within a junction temperature range of -65°C to 150°C.

 

Packaged in a TO-220-3 configuration, the TIP121 is designed for through-hole mounting. It has a power dissipation rating of 65W at 25°C case temperature and 2W at 25°C ambient temperature.

 

This transistor is complementary to the TIP125, TIP126, and TIP127 series.

TIP121 Quick Information

Product Type: NPN Darlington Transistor
Canonical Name: TIP121 NPN Epitaxial Darlington Transistor
Subcategory: Bipolar (BJT) - Single

TIP121 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

TIP121 Estimated Pricing

Qty Low High
1+ $0.51 $0.51

Estimated market price range - modelled values for guidance only, not live distributor offers.

TIP121 Features

  • NPN Epitaxial Darlington Transistor
  • 80V Collector-Emitter Voltage
  • 5A Continuous Collector Current
  • 1000 DC Current Gain (Min)
  • TO-220 Package for Through-Hole Mounting

TIP121 Applications

  • Ideal for relay and solenoid driver circuits.
  • Used in power switching and linear amplification.
  • Suitable for motor control and actuator applications.

TIP121 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the maximum collector-emitter voltage for the TIP121?

The maximum collector-emitter voltage (VCEO) for the TIP121 is 80V.

What is the continuous collector current rating of the TIP121?

The TIP121 has a continuous collector current (IC) rating of 5A.

What is the power dissipation of the TIP121 at 25°C case temperature?

The power dissipation of the TIP121 is 65W at a case temperature of 25°C.

What is the DC current gain (hFE) of the TIP121?

The DC current gain (hFE) of the TIP121 is a minimum of 1000 at 3A collector current and 3V collector-emitter voltage.

What is the operating temperature range for the TIP121?

The TIP121 can operate within a junction temperature range of -65°C to 150°C.

What package type is the TIP121 supplied in?

The TIP121 is supplied in a TO-220-3 package.

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