MMBT6428 The MMBT6428 is an NPN bipolar junction transistor from ON Semiconductor designed for general purpose amplifier applications. It offers a 50V collector-emitter voltage and 500mA continuous collector current.
Mfr Part #:

MMBT6428

Available from 3 distributors
Mfr Name: On Semiconductor
On Semiconductor
The MMBT6428 is an NPN bipolar junction transistor from ON Semiconductor designed for general purpose amplifier applications. It offers a 50V collector-emitter voltage and 500mA continuous collector current.
Total Stock: 118,380 pcs
$ Price Range: $0.99

MMBT6428 Available from 3 distributors

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116,000 pcs
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1,400 pcs
1400 pcs On Request 1 On Request On Request On Request On Request 2026-05-08 07:15:31
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980 pcs
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MMBT6428 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Breakdown Voltage (Minimum @ IC=1.0 mA, IB=0)
Breakdown Voltage (Minimum @ IC=100 μA, IE=0)
Current
Current Gain (Minimum @ VCE = 5.0 V, IC = 1.0 mA)
Current Gain (Minimum @ VCE = 5.0 V, IC = 10 mA)
DC Current Gain (hFE) (Min) @ Ic, Vce
Forward Voltage (Nominal/Maximum @ V CE = 5.0 V, IC = 1.0 mA)
Frequency
Leakage Current (Maximum @ V CB = 30 V, IE = 0)
Leakage Current (Maximum @ V CE = 30 V, IB = 0)
Leakage Current (Maximum @ V EB = 5.0 V, IB = 0)
Mounting Type
Operating Temperature
Power
Saturation Voltage (Maximum @ IC = 10 mA, IB = 0.5 mA)
Supplier Device Package
Supplier Package
Thermal Resistance Junction-to-Ambient
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage
capacitance (Maximum @ V CB = 10 V, IE = 0, f = 1.0 MHz)
capacitance (Maximum @ V EB = 0.5 V, IC = 0, f = 1.0 MHz)

MMBT6428 Description

Short technical summary and product information.

The MMBT6428 is an NPN bipolar junction transistor (BJT) manufactured by ON Semiconductor. This general-purpose amplifier transistor is designed for applications requiring collector currents up to 300mA. It features a maximum collector-emitter voltage of 50V and a continuous collector current rating of 500mA.

 

Key electrical characteristics include a DC current gain (hFE) of 250 minimum at 100µA and 5V, and a collector-emitter saturation voltage (Vce(sat)) of 600mV maximum at 5mA base current and 100mA collector current. The gain bandwidth product (fT) is rated at 100-700MHz at 1.0mA and 5V.

 

This device comes in a compact SOT-23-3 surface mount package, making it suitable for space-constrained designs. The operating temperature range is -55°C to 150°C (TJ), and it has a total power dissipation of 350mW at 25°C ambient temperature. The thermal resistance junction to ambient is 357°C/W.

 

The MMBT6428 is suitable for various general-purpose amplification tasks in electronic circuits. Its small package size and robust electrical specifications make it a versatile component for both hobbyist and industrial applications.

MMBT6428 Quick Information

Product Type: NPN Transistor
Canonical Name: MMBT6428 NPN General Purpose Amplifier Transistor
Subcategory: Bipolar (BJT) - Single

MMBT6428 Compliance

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

MMBT6428 Estimated Pricing

Qty Low High
1+ $0.99 $0.99

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

MMBT6428 Features

  • NPN bipolar junction transistor.
  • Rated for 50V collector-emitter voltage.
  • Handles 500mA continuous collector current.
  • Compact SOT-23-3 surface mount package.
  • Wide operating temperature range.

MMBT6428 Applications

  • Used in switching circuits
  • Suitable for signal amplification
  • Ideal for power management modules
  • Applicable in compact electronic devices

MMBT6428 FAQs

6 frequently asked questions generated from this part’s specifications.
What is the maximum collector-emitter voltage for the MMBT6428?

The MMBT6428 has a maximum collector-emitter voltage of 50V.

What is the continuous collector current rating of the MMBT6428?

The MMBT6428 can handle a continuous collector current of 500mA.

What is the operating temperature range for the MMBT6428 transistor?

The operating and storage junction temperature range for the MMBT6428 is -55°C to 150°C.

What package type is the MMBT6428 available in?

The MMBT6428 is available in a SOT-23-3 package.

What is the DC Current Gain (hFE) of the MMBT6428?

The DC Current Gain (hFE) of the MMBT6428 is a minimum of 250 at 100µA collector current and 5V collector-emitter voltage.

What is the gain bandwidth product for the MMBT6428?

The gain bandwidth product (fT) for the MMBT6428 is between 100MHz and 700MHz at 1.0mA collector current and 5V collector-emitter voltage.

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