TIP121G The On Semiconductor TIP121G is an NPN Darlington transistor designed for general-purpose amplifier and low-speed switching applications. It features an 80V collector-emitter voltage and a 5A continuous current rating.
Mfr Part #:

TIP121G

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The On Semiconductor TIP121G is an NPN Darlington transistor designed for general-purpose amplifier and low-speed switching applications. It features an 80V collector-emitter voltage and a 5A continuous current rating.
Total Stock: 8,750 pcs
$ Price Range: $0.51

TIP121G Available from 1 distributor

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Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
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8,750 pcs
8750 pcs On Request 1 On Request On Request On Request On Request On Request

TIP121G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Current (Maximum)
DC Current Gain (hFE) (Min) @ Ic, Vce
Mounting Type
Operating Temperature
Operating Temperature (Minimum/Maximum)
Power
Power Dissipation (Maximum @ TC=25 °C)
Power Dissipation (Maximum) @ TA=25°C
Supplier Device Package
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage
Voltage - Maximum
current (Maximum @ Peak)
gain (Typical @ IC = 4.0 Adc)
voltage (Maximum @ IC = 3.0 Adc)
voltage (Maximum @ IC = 5.0 Adc)
voltage (Maximum @ Ib = 20 mA, Ic = 5 A)

TIP121G Description

Short technical summary and product information.

The TIP121G from On Semiconductor is a complementary silicon power transistor featuring a monolithic construction with built-in base-emitter shunt resistors. This NPN Darlington transistor is designed for general-purpose amplifier and low-speed switching applications.

 

Key electrical specifications include a collector-emitter sustaining voltage (VCEO(sus)) of 80V, a continuous collector current of 5A, and a peak collector current of 8A. It offers a high DC current gain (hFE) typically 2500 at 4.0 Adc, and a minimum gain of 1000 at 3A, 3V. The collector-emitter saturation voltage (VCE(sat)) is a maximum of 2.0V at 3.0 Adc and 4.0V at 5.0 Adc.

 

This device is housed in a TO-220-3 package and is suitable for through-hole mounting. It operates within a junction temperature range of -65°C to 150°C. The datasheet indicates Pb-Free packages are available.

TIP121G Quick Information

Product Type: NPN Darlington Transistor
Canonical Name: TIP121G NPN Darlington Power Transistor
Subcategory: Bipolar (BJT) - Single

TIP121G Compliance

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

TIP121G Estimated Pricing

Qty Low High
1+ $0.51 $0.51

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

TIP121G Features

  • NPN Darlington transistor for power applications.
  • 80V collector-emitter voltage rating.
  • 5A continuous collector current capability.
  • High DC current gain up to 2500.
  • TO-220 package for through-hole mounting.

TIP121G Applications

  • Medium-power switching circuits.
  • General purpose amplification stages.
  • Motor and relay driver circuits.
  • Power supply output stages.

TIP121G FAQs

6 frequently asked questions generated from this part’s specifications.
What is the maximum collector-emitter voltage for the TIP121G?

The collector-emitter sustaining voltage (VCEO(sus)) is 80 Vdc minimum.

What is the continuous collector current rating of the TIP121G?

The continuous collector current is 5 Adc.

What package does the TIP121G come in?

The TIP121G is available in a TO-220-3 through-hole package.

What is the operating temperature range of the TIP121G?

The operating junction temperature range is -65°C to 150°C.

What is the typical DC current gain of the TIP121G?

The typical DC current gain (hFE) is 2500 at IC = 4.0 Adc.

What is the maximum power dissipation of the TIP121G?

The maximum power dissipation is 65 W at case temperature 25°C and 2 W at ambient temperature 25°C.

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