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

onsemi MMBTA06

Name: MMBTA06
Brand: onsemi
SKU: MMBTA06
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBTA06

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MMBTA06.pdf

Description:: TRANS NPN 80V 0.5A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMBTA06 from ON Semiconductor is an NPN general-purpose amplifier transistor in SOT-23 package, rated for 80 V V_CEO, 500 mA I_C, and 350 mW P_D at 25°C, with h_FE ≥ 100 at 10–100 mA, used in low-power linear amplification and switching stages of consumer and industrial signal conditioning circuits.

For engineers reviewing the MMBTA06 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal limits, SOT-23 terminal mapping, and validated alternative transistors for discrete amplifier and switch design validation.

Technical Context

The MMBTA06 operates as a silicon NPN bipolar junction transistor optimized for general-purpose amplification up to 100 MHz f_T, with V_CE(sat) ≤ 0.25 V at I_C = 100 mA / I_B = 10 mA and V_BE(on) ≈ 1.2 V under same conditions. Its 357 °C/W R_θJA reflects thermal performance on standard FR-4 PCBs.

Designed for continuous collector currents up to 500 mA and junction temperatures from –55°C to +150°C, the device supports stable DC biasing and small-signal gain across industrial ambient ranges, with ICEO ≤ 0.1 μA at V_CE = 60 V ensuring low leakage in standby states.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	80 V - Maximum safe collector-emitter voltage before breakdown; enables use in 24–48 V supply rail interfaces.
I_C (max)	500 mA - Continuous collector current rating; supports medium-current driver and pre-driver stages.
h_FE	≥100 at I_C = 10–100 mA - Confirmed DC current gain ensures predictable base drive sizing in amplifier and switch designs.
f_T	100 MHz - Gain-bandwidth product validates suitability for audio and low-MHz signal amplification.
P_D @ 25°C	350 mW - Power dissipation limit in SOT-23 package; requires thermal derating above 25°C at 2.8 mW/°C.
R_θJA	357 °C/W - Junction-to-ambient thermal resistance on standard FR-4; informs heatsinking requirements for sustained operation.

Pinout & Package

SOT-23 3-lead plastic surface-mount package with gull-wing leads; compact footprint (2.92 × 1.30 mm) and low profile (1.20 mm max height); marked "1G" on top surface.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink node; connects to ground or low-impedance return path in common-emitter configurations.
2 (Base)	B	Control input; requires current-limited drive (e.g., via series resistor) to achieve target I_C per h_FE.
3 (Collector)	C	Current source node; ties to load or higher-voltage rail; handles full output current and voltage swing.

Key Features

Feature	Design Value
NPN bipolar architecture	Enables classic common-emitter amplification and saturated switching with predictable V_CE(sat) and h_FE behavior.
80 V V_CEO rating	Supports operation across 12–48 V systems without risk of avalanche breakdown under normal bias conditions.
350 mW power rating in SOT-23	Delivers usable gain and switching capability in space-constrained PCB layouts without requiring TO-92 through-hole real estate.
h_FE ≥ 100 (10–100 mA)	Reduces required base drive current and simplifies bias network design for consistent turn-on in linear and switching modes.
100 MHz f_T	Ensures adequate bandwidth for audio-frequency amplification and fast digital switching (t_on/t_off < 100 ns typical).

Applications

Audio Pre-Amplifier Stage	Low-Voltage Relay Driver
Use Scenario: Amplifying microphone-level signals (1–10 mV) to line-level (0.3–1 V) in portable audio recorders and headset interfaces. IC Role / Device Role / Timing Role: Discrete NPN amplifier in common-emitter configuration with emitter degeneration for stable gain and low distortion. Use Value: h_FE ≥ 100 and f_T = 100 MHz ensure flat 20 Hz–20 kHz response with <1% THD at 100 mW output into 32 Ω.	Use Scenario: Driving 5–12 V coil relays (e.g., 70–150 Ω, 40–100 mA hold current) from microcontroller GPIO pins. IC Role / Device Role / Timing Role: Saturated switch controlling relay coil current with minimal V_CE(sat) to reduce power loss and heat buildup. Use Value: V_CE(sat) ≤ 0.25 V at I_C = 100 mA limits coil-side dissipation to <25 mW, enabling reliable operation without heatsinking.
LED Current Regulator	Signal Level Shifter
Use Scenario: Constant-current driving of indicator LEDs (20–30 mA) from 3.3 V or 5 V logic rails in industrial HMI panels. IC Role / Device Role / Timing Role: Emitter-follower configured transistor regulating LED current via base voltage reference and emitter resistor. Use Value: V_CEO = 80 V and I_C = 500 mA allow margin for transient overvoltage and multi-LED string expansion.	Use Scenario: Translating 1.8 V logic outputs to 3.3 V or 5 V input thresholds in mixed-voltage MCU peripherals (e.g., UART, SPI). IC Role / Device Role / Timing Role: Common-emitter level shifter with pull-up on collector and base driven by low-voltage signal. Use Value: f_T = 100 MHz and fast saturation support clean edge transitions up to 10 Mbps without pulse distortion.

Audio Pre-Amplifier Stage

Low-Voltage Relay Driver

Use Scenario: Amplifying microphone-level signals (1–10 mV) to line-level (0.3–1 V) in portable audio recorders and headset interfaces.

IC Role / Device Role / Timing Role: Discrete NPN amplifier in common-emitter configuration with emitter degeneration for stable gain and low distortion.

Use Value: h_FE ≥ 100 and f_T = 100 MHz ensure flat 20 Hz–20 kHz response with <1% THD at 100 mW output into 32 Ω.

Use Scenario: Driving 5–12 V coil relays (e.g., 70–150 Ω, 40–100 mA hold current) from microcontroller GPIO pins.

IC Role / Device Role / Timing Role: Saturated switch controlling relay coil current with minimal V_CE(sat) to reduce power loss and heat buildup.

Use Value: V_CE(sat) ≤ 0.25 V at I_C = 100 mA limits coil-side dissipation to <25 mW, enabling reliable operation without heatsinking.

LED Current Regulator

Signal Level Shifter

Use Scenario: Constant-current driving of indicator LEDs (20–30 mA) from 3.3 V or 5 V logic rails in industrial HMI panels.

IC Role / Device Role / Timing Role: Emitter-follower configured transistor regulating LED current via base voltage reference and emitter resistor.

Use Value: V_CEO = 80 V and I_C = 500 mA allow margin for transient overvoltage and multi-LED string expansion.

Use Scenario: Translating 1.8 V logic outputs to 3.3 V or 5 V input thresholds in mixed-voltage MCU peripherals (e.g., UART, SPI).

IC Role / Device Role / Timing Role: Common-emitter level shifter with pull-up on collector and base driven by low-voltage signal.

Use Value: f_T = 100 MHz and fast saturation support clean edge transitions up to 10 Mbps without pulse distortion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC846B	Lower V_CEO (65 V), identical SOT-23 package and h_FE range (110–220), but lower P_D (250 mW).	Not suitable for 48 V rail interfaces; acceptable only where V_CE < 60 V and power < 200 mW.	Select BC846B only when operating voltage is capped at ≤60 V and thermal budget permits reduced dissipation.
PN2222A	TO-92 package, higher P_D (625 mW), same V_CEO (60 V), h_FE 100–300, but larger footprint and lower f_T (~250 MHz but less consistent at low I_C).	Requires through-hole mounting and board area; better for high-current analog stages but incompatible with SMT-only assembly.	Choose PN2222A when board space allows TO-92 and higher continuous power (>350 mW) is needed; not drop-in for MMBTA06.

Compared with BC846B and PN2222A, the MMBTA06 uniquely balances SOT-23 miniaturization, 80 V robustness, and 350 mW dissipation-making it optimal for space-constrained, medium-voltage amplifier and switch designs where TO-92 is impractical and 65 V limits are insufficient.

Availability

MMBTA06 is available at Aetrix Electronics and suitable for audio pre-amplifiers, low-voltage relay drivers, and LED current regulators requiring stable component supply and SMT-compatible packaging.

Supply support for MMBTA06 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.

The MMBTA06 belongs to ON Semiconductor's legacy general-purpose bipolar transistor portfolio, originally developed by Fairchild and maintained for cost-sensitive, high-volume linear and switching applications demanding reliability and broad temperature operation.

FAQ

What is the maximum collector-emitter voltage rating for the MMBTA06?

The MMBTA06 has a V_CEO rating of 80 V, meaning it can safely withstand up to 80 volts between collector and emitter with the base open. This rating is confirmed in the Absolute Maximum Ratings table of the official ON Semiconductor datasheet for MMBTA06 and applies at T_A = 25°C. Exceeding this voltage risks avalanche breakdown and permanent damage to the MMBTA06.

Is the MMBTA06 pin-compatible with the MPSA06 or PZTA06?

No-the MMBTA06 is not pin-compatible with the MPSA06 or PZTA06. While all three share identical electrical specifications, they differ in package and pinout: MMBTA06 uses SOT-23 (E-B-C), MPSA06 uses TO-92 (E-C-B), and PZTA06 uses SOT-223 (C-E-B-C with thermal tab). Substituting MMBTA06 for either requires PCB layout revision due to different footprints and terminal assignments.

What is the DC current gain (h_FE) specification for the MMBTA06 at typical operating conditions?

The MMBTA06 guarantees h_FE ≥ 100 at I_C = 10 mA and V_CE = 1.0 V, and also maintains h_FE ≥ 100 at I_C = 100 mA and V_CE = 1.0 V. These values are specified in the Electrical Characteristics table of the MMBTA06 datasheet and reflect minimum guaranteed gain-not typical or average-ensuring design margin for base drive calculations in both small-signal and medium-current applications.

Can the MMBTA06 be used in switching applications, and what is its saturation voltage?

Yes, the MMBTA06 is suitable for switching applications, with a guaranteed V_CE(sat) ≤ 0.25 V at I_C = 100 mA and I_B = 10 mA. This low saturation voltage minimizes conduction loss and self-heating during on-state operation, making the MMBTA06 effective in relay drivers, LED switches, and digital logic interface circuits where efficiency and thermal management are critical.

What is the thermal resistance (R_θJA) of the MMBTA06, and how does it affect PCB layout?

The MMBTA06 has an R_θJA of 357 °C/W when mounted on a standard FR-4 PCB (36 mm × 18 mm × 1.5 mm). This high value means even modest power dissipation (e.g., 200 mW) raises junction temperature by ~71°C above ambient-requiring careful copper pour design around the collector pad and avoidance of dense thermal islands. Layout must follow ON Semiconductor's recommended SOT-23 land pattern to maintain this spec for the MMBTA06.

MMBTA06 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:: NPN

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 80 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 10mA, 100mA

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 100mA, 1V

Power - Max:: 350 mW

Frequency - Transition:: 100MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

MMBTA06 FAQ

1.How can I place an order for MMBTA06 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBTA06 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 MMBTA06 reliable?

The price and inventory of MMBTA06 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA06 is usually 5 days.

3.What payment methods are accepted for MMBTA06?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA06 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBTA06?

MMBTA06 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBTA06 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 MMBTA06?

For technical support, including MMBTA06 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA06 requirements.

6.How does Aetrix verify that MMBTA06 is sourced from the original manufacturer or authorized distributors?

All MMBTA06 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 MMBTA06 meets industry standards.

7.What is the process for return or replacement of MMBTA06?

All MMBTA06 units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA06, 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 MMBTA06 part is unused and in its original packaging.

Return procedure for MMBTA06:

1.Submit a request within 90 days.

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

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