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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi MMBT2907AK

Name: MMBT2907AK
Brand: onsemi
SKU: MMBT2907AK
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBT2907AK

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: MMBT2907AK.pdf

Description:: TRANS PNP 60V 0.6A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMBT2907AK from Fairchild Semiconductor is a PNP epitaxial silicon general-purpose transistor in SOT-23 package, rated for −60 V V_CEO, −600 mA I_C, 350 mW P_C, with h_FE = 100 at I_C = −1.0 mA and f_T = 200 MHz. It serves as a low-power switching or linear amplification device in bias networks, level shifters, and discrete logic interfaces.

For engineers reviewing the MMBT2907AK datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, SOT-23 terminal mapping (1=Base, 2=Emitter, 3=Collector), −60 V breakdown rating, saturation voltage under −150 mA/−15 mA drive, and thermal operation across −55 °C to 150 °C.

Technical Context

This discrete PNP bipolar junction transistor uses epitaxial base construction for stable DC current gain and fast switching response. Its design supports linear operation with h_FE ≥ 75 at I_C = −0.1 mA and switching duty with t_ON = 50 ns and t_OFF = 110 ns under specified test conditions.

It features low output capacitance (C_ob = 8 pF at V_CB = −10 V) and tight leakage control (I_CBO ≤ −0.01 µA at V_CB = −50 V), enabling reliable performance in high-frequency biasing and pulse applications up to 200 MHz f_T.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−60 V: Maximum safe collector-emitter voltage before avalanche breakdown in common-emitter configuration.
I_C	−600 mA: Continuous DC collector current limit defining maximum load-handling capability.
P_C	350 mW: Maximum power dissipation at T_A = 25 °C, derating linearly above 25 °C per datasheet curve.
h_FE	100 @ I_C = −1.0 mA: Confirmed DC current gain enabling predictable base drive sizing for switching.
f_T	200 MHz: Unity-gain frequency confirming usable bandwidth for RF bias and fast digital switching.
t_OFF	110 ns: Measured turn-off delay under V_CC = −6 V, I_C = −150 mA, defining minimum switching period limitation.
C_ob	8 pF @ V_CB = −10 V: Output junction capacitance affecting high-frequency impedance and rise/fall time in tuned circuits.

Pinout & Package

SOT-23 plastic surface-mount package with gull-wing leads; standardized 3-pin footprint measuring 2.90 mm × 1.30 mm × 1.0 mm (L × W × H), compatible with automated pick-and-place and reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control electrode; requires negative current injection relative to emitter to forward-bias BE junction and enable conduction.
2	Emitter	Current source terminal in PNP configuration; connected to higher potential rail in typical switch layouts.
3	Collector	Current sink terminal; carries load current to ground or lower-potential node when saturated.

Key Features

Feature	Design Value
Epitaxial base structure	Enables consistent h_FE and low leakage across temperature, supporting stable bias in analog and switching designs.
Fast switching speed	t_ON = 50 ns / t_OFF = 110 ns allows use in >1 MHz digital logic interface and PWM control circuits.
Low saturation voltage	V_CE(sat) = −0.4 V @ I_C = −150 mA / I_B = −15 mA minimizes conduction loss in low-voltage switching rails.
High f_T	200 MHz unity-gain bandwidth supports RF detector biasing and broadband amplifier stages up to VHF.
Wide temperature range	−55 °C to +150 °C operating junction range enables deployment in automotive under-hood and industrial motor-control environments.

Applications

LED Driver Circuit	Level Shifter Interface
Use Scenario: Driving 20 mA red/green LEDs from 3.3 V microcontroller GPIO pins with active-low logic control. IC Role / Device Role / Timing Role: Discrete PNP switch providing current sink path from LED anode to supply rail, enabling inverted logic-level control. Use Value: Low V_CE(sat) ensures <0.5 V drop across transistor, preserving >2.8 V for LED forward bias and maximizing luminous output.	Use Scenario: Translating 1.8 V logic-high signal to 5 V domain in mixed-voltage I²C or UART bus interface. IC Role / Device Role / Timing Role: Active-pull-up level shifter using MMBT2907AK as open-collector driver with external pull-up to 5 V. Use Value: Verified 200 MHz f_T and 110 ns t_OFF support clean edge transitions up to 1 Mbps without distortion.
Power Supply Enable Switch	Discrete Logic Inverter
Use Scenario: Enabling/disabling 12 V auxiliary rail in embedded system via 3.3 V MCU output with reverse-polarity protection. IC Role / Device Role / Timing Role: High-side PNP switch controlling PMOS gate or LDO EN pin, activated by low-going MCU signal. Use Value: −60 V V_CEO rating provides 5× margin over 12 V rail, ensuring robustness against load-dump transients.	Use Scenario: Implementing NOT function in space-constrained PCB where integrated logic gates are unavailable or cost-prohibitive. IC Role / Device Role / Timing Role: Single-transistor inverter with resistor bias network, delivering rail-to-rail logic swing at <100 kHz. Use Value: h_FE ≥ 100 at I_C = −1 mA guarantees reliable saturation with minimal base drive current, reducing MCU I/O loading.

LED Driver Circuit

Level Shifter Interface

Use Scenario: Driving 20 mA red/green LEDs from 3.3 V microcontroller GPIO pins with active-low logic control.

IC Role / Device Role / Timing Role: Discrete PNP switch providing current sink path from LED anode to supply rail, enabling inverted logic-level control.

Use Value: Low V_CE(sat) ensures <0.5 V drop across transistor, preserving >2.8 V for LED forward bias and maximizing luminous output.

Use Scenario: Translating 1.8 V logic-high signal to 5 V domain in mixed-voltage I²C or UART bus interface.

IC Role / Device Role / Timing Role: Active-pull-up level shifter using MMBT2907AK as open-collector driver with external pull-up to 5 V.

Use Value: Verified 200 MHz f_T and 110 ns t_OFF support clean edge transitions up to 1 Mbps without distortion.

Power Supply Enable Switch

Discrete Logic Inverter

Use Scenario: Enabling/disabling 12 V auxiliary rail in embedded system via 3.3 V MCU output with reverse-polarity protection.

IC Role / Device Role / Timing Role: High-side PNP switch controlling PMOS gate or LDO EN pin, activated by low-going MCU signal.

Use Value: −60 V V_CEO rating provides 5× margin over 12 V rail, ensuring robustness against load-dump transients.

Use Scenario: Implementing NOT function in space-constrained PCB where integrated logic gates are unavailable or cost-prohibitive.

IC Role / Device Role / Timing Role: Single-transistor inverter with resistor bias network, delivering rail-to-rail logic swing at <100 kHz.

Use Value: h_FE ≥ 100 at I_C = −1 mA guarantees reliable saturation with minimal base drive current, reducing MCU I/O loading.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT2907AL	Same die, different SOT-23 marking variant; identical electrical specs and thermal ratings.	No functional difference; used interchangeably in same PCB footprints and BOMs.	Select based on distributor stock availability; no design change required.
PN2907A	TO-92 package (larger footprint, higher P_D = 625 mW); otherwise matches V_CEO, I_C, h_FE, and f_T specs.	Requires PCB layout change; suited for prototyping or through-hole assembly where thermal mass matters.	Choose PN2907A only if SOT-23 assembly is unavailable or thermal derating beyond 350 mW is needed.

Compared with MMBT2907AL and PN2907A, the MMBT2907AK offers identical small-signal PNP performance in the industry-standard SOT-23 package, while the TO-92 PN2907A trades miniaturization for higher power handling and manual assembly compatibility.

Availability

MMBT2907AK is available at Aetrix Electronics and suitable for LED driver circuits, level shifter interfaces, power supply enable switches, and discrete logic inverters requiring stable component supply across automotive, industrial control, and consumer electronics programs.

Supply support for MMBT2907AK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Fairchild Semiconductor was a U.S.-based designer and manufacturer of analog and discrete semiconductors, acquired by ON Semiconductor in 2016; its legacy product lines remain widely supported and qualified.

The MMBT2907AK belongs to Fairchild's general-purpose bipolar transistor family, engineered for cost-effective, reliable switching and amplification in space-constrained, high-volume applications.

FAQ

What is the pin configuration of the MMBT2907AK?

The MMBT2907AK uses standard SOT-23 pinout: Pin 1 is Base, Pin 2 is Emitter, Pin 3 is Collector. This configuration is confirmed in the official Fairchild MMBT2907AK Rev. B datasheet mechanical drawing and electrical test setup diagrams. The marking "2FK" on the top surface aligns with this terminal assignment, and it is not interchangeable with NPN SOT-23 devices like the MMBT2222A without circuit redesign.

Does the MMBT2907AK support operation at elevated temperatures?

Yes, the MMBT2907AK is rated for junction and storage temperatures from −55 °C to +150 °C. Its electrical characteristics-including h_FE, V_CE(sat), and leakage-are guaranteed across this full range per the datasheet's "Electrical Characteristics" table and "Typical Performance Characteristics" curves. Derating of power dissipation begins linearly above 25 °C ambient, as shown in Figure 6.

What is the maximum collector current the MMBT2907AK can handle continuously?

The MMBT2907AK has a continuous collector current rating of −600 mA at T_A = 25 °C. This value is defined in the Absolute Maximum Ratings table and applies under free-air conditions. At higher ambient temperatures or with limited PCB copper area, the usable I_C must be reduced per the thermal derating curve in the datasheet to maintain T_J ≤ 150 °C.

How does the MMBT2907AK compare to the MMBT2907A in terms of specifications?

The MMBT2907AK and MMBT2907A share identical absolute maximum ratings, electrical characteristics, and package dimensions. The "K" suffix denotes a specific revision (Rev. B) and marking variant ("2FK") but introduces no parametric differences. Both meet the same Fairchild specification and may be used interchangeably in production without validation changes.

Can the MMBT2907AK be used in RF amplifier stages?

Yes-the MMBT2907AK has a current gain bandwidth product (f_T) of 200 MHz at I_C = −50 mA and V_CE = −20 V, making it suitable for VHF-band RF amplifier biasing, detector stages, and low-noise preamplifier applications. Its 8 pF C_ob and fast t_ON/t_OFF further support stable operation in narrowband tuned circuits below 100 MHz.

MMBT2907AK Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 600 mA

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 1.6V @ 50mA, 500mA

Current - Collector Cutoff (Max):: 10nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 10V

Power - Max:: 350 mW

Frequency - Transition:: 200MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

MMBT2907AK FAQ

1.How can I place an order for MMBT2907AK through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBT2907AK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MMBT2907AK reliable?

The price and inventory of MMBT2907AK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT2907AK is usually 5 days.

3.What payment methods are accepted for MMBT2907AK?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT2907AK transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBT2907AK?

MMBT2907AK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBT2907AK order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MMBT2907AK?

For technical support, including MMBT2907AK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT2907AK requirements.

6.How does Aetrix verify that MMBT2907AK is sourced from the original manufacturer or authorized distributors?

All MMBT2907AK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MMBT2907AK meets industry standards.

7.What is the process for return or replacement of MMBT2907AK?

All MMBT2907AK units undergo pre-shipment inspection (PSI). If there is an issue with MMBT2907AK, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MMBT2907AK part is unused and in its original packaging.

Return procedure for MMBT2907AK:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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