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

onsemi MMBTA06_L98Z

Name: MMBTA06_L98Z
Brand: onsemi
SKU: MMBTA06_L98Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBTA06_L98Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: MMBTA06_L98Z.pdf

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

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Product details

Overview

MMBTA06_L98Z 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 mA/100 mA, used in low-power signal amplification and switching circuits in consumer and industrial electronics.

For engineers reviewing the MMBTA06_L98Z datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated SOT-23 pin configuration, real-world use cases in biasing and driver stages, and two confirmed alternative transistors with documented performance trade-offs.

Technical Context

The MMBTA06_L98Z operates as a silicon NPN bipolar junction transistor optimized for linear amplification and saturated switching up to 300 mA collector current. Its f_T of 100 MHz supports audio and low-speed digital signal handling, while V_BE(on) = 1.2 V at I_C = 100 mA defines base drive requirements.

Thermal design is constrained by R_θJA = 357 °C/W on FR-4 PCB, requiring careful layout for ambient temperatures above 50°C. The device's V_CE(sat) ≤ 0.25 V at I_C = 100 mA / I_B = 10 mA enables efficient low-voltage switching in discrete logic interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	80 V - Maximum safe collector-emitter voltage before breakdown; sets upper rail limit in amplifier or switch designs.
I_C (max)	500 mA - Continuous collector current rating; defines maximum load-handling capability in driver applications.
h_FE	≥100 at I_C = 10 mA & I_C = 100 mA - Ensures stable DC gain across operating range for predictable biasing and amplification.
V_CE(sat)	≤0.25 V at I_C = 100 mA / I_B = 10 mA - Enables low conduction loss in saturated switching, reducing power dissipation in digital output stages.
f_T	100 MHz - Supports bandwidth-critical functions such as audio pre-amplifiers and pulse shaping up to ~10 MHz practical bandwidth.
R_θJA	357 °C/W - Requires thermal relief pads or reduced ambient temperature to maintain T_J ≤ 150°C at full power.

Pinout & Package

SOT-23 3-lead plastic surface-mount package with standard JEDEC TO-236AB footprint; compact 2.92 mm × 1.30 mm body, 1.00 mm max height, and gull-wing leads for reflow compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Reference node for bias network; connects to ground or low-impedance return path in common-emitter configurations.
2 (Base)	Control input	Receives current-limited drive (e.g., via 10 kΩ resistor) to set operating point; sensitive to ESD due to thin oxide layer.
3 (Collector)	Current source terminal	Connects to load or pull-up; must be routed with adequate copper area to manage thermal dissipation per R_θJA.

Key Features

Feature	Design Value
General-purpose NPN architecture	Validated for both linear amplification (h_FE-stable region) and saturated switching (low V_CE(sat)) without redesign.
High V_CEO rating	80 V withstand capability allows direct interface with 24 V and 48 V industrial control rails without external clamping.
Low-profile SOT-23 package	Enables high-density PCB layouts in space-constrained modules such as sensor signal conditioners and portable power supplies.
JEDEC-qualified thermal performance	R_θJA = 357 °C/W measured on standard FR-4 board ensures predictable derating curves for production thermal validation.

Applications

Audio Pre-amplifier Stage	Microcontroller GPIO Driver
Use Scenario: Amplifying weak microphone or piezoelectric sensor signals prior to ADC sampling in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Discrete NPN amplifier configured in common-emitter topology with emitter degeneration for gain stability. Use Value: h_FE ≥100 and f_T = 100 MHz support clean 20 kHz audio bandwidth with minimal distortion at supply voltages down to 3.3 V.	Use Scenario: Driving LED indicators, small relays, or MOSFET gates from 3.3 V or 5 V microcontroller outputs. IC Role / Device Role / Timing Role: Low-side saturated switch activated by MCU GPIO with base resistor limiting I_B to ensure β-driven saturation. Use Value: V_CE(sat) ≤ 0.25 V minimizes voltage drop and heat generation, enabling reliable 100 mA load switching without heatsinking.
Industrial Sensor Biasing	Legacy Logic Level Translation
Use Scenario: Providing stable bias current to analog sensors (e.g., thermistors, RTDs) in PLC input modules operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Constant-current source built around emitter-follower or current mirror configuration. Use Value: ICEO ≤ 0.1 μA and TJ range of –55°C to +150°C ensure leakage-insensitive operation and long-term calibration stability.	Use Scenario: Interfacing 5 V TTL logic outputs to 3.3 V CMOS inputs in mixed-voltage industrial controllers. IC Role / Device Role / Timing Role: Active level shifter using common-emitter inverter with pull-up to 3.3 V rail. Use Value: Fast turn-on/off (enabled by f_T = 100 MHz) and low V_BE(on) = 1.2 V allow sub-100 ns propagation delay with rail-to-rail logic swing.

Audio Pre-amplifier Stage

Microcontroller GPIO Driver

Use Scenario: Amplifying weak microphone or piezoelectric sensor signals prior to ADC sampling in battery-powered IoT nodes.

IC Role / Device Role / Timing Role: Discrete NPN amplifier configured in common-emitter topology with emitter degeneration for gain stability.

Use Value: h_FE ≥100 and f_T = 100 MHz support clean 20 kHz audio bandwidth with minimal distortion at supply voltages down to 3.3 V.

Use Scenario: Driving LED indicators, small relays, or MOSFET gates from 3.3 V or 5 V microcontroller outputs.

IC Role / Device Role / Timing Role: Low-side saturated switch activated by MCU GPIO with base resistor limiting I_B to ensure β-driven saturation.

Use Value: V_CE(sat) ≤ 0.25 V minimizes voltage drop and heat generation, enabling reliable 100 mA load switching without heatsinking.

Industrial Sensor Biasing

Legacy Logic Level Translation

Use Scenario: Providing stable bias current to analog sensors (e.g., thermistors, RTDs) in PLC input modules operating across –40°C to +85°C.

IC Role / Device Role / Timing Role: Constant-current source built around emitter-follower or current mirror configuration.

Use Value: ICEO ≤ 0.1 μA and TJ range of –55°C to +150°C ensure leakage-insensitive operation and long-term calibration stability.

Use Scenario: Interfacing 5 V TTL logic outputs to 3.3 V CMOS inputs in mixed-voltage industrial controllers.

IC Role / Device Role / Timing Role: Active level shifter using common-emitter inverter with pull-up to 3.3 V rail.

Use Value: Fast turn-on/off (enabled by f_T = 100 MHz) and low V_BE(on) = 1.2 V allow sub-100 ns propagation delay with rail-to-rail logic swing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT3904LT1G	V_CEO = 40 V, h_FE = 100–300 (min 100), R_θJA = 357 °C/W, same SOT-23 package	Lower voltage rating limits use in >40 V systems; higher h_FE spread increases gain variation in production	Select when operating below 40 V and tighter h_FE tolerance is not required.
BC846B,215	V_CEO = 65 V, h_FE = 200–450 (min 200), R_θJA = 300 °C/W, same SOT-23	Higher gain improves sensitivity in low-current amplifiers but reduces saturation margin at high I_C	Prefer for low-noise pre-amplifiers where V_CEO ≤ 65 V suffices and higher h_FE improves SNR.

Compared with MMBTA06_L98Z, MMBT3904LT1G offers identical thermal behavior but lower voltage headroom, while BC846B,215 provides higher gain and better thermal resistance at the cost of reduced V_CEO margin and less predictable saturation characteristics at 100 mA.

Availability

MMBTA06_L98Z is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller peripheral drivers, and audio signal conditioning requiring stable component supply, consistent parametric performance, and long-term obsolescence management.

Supply support for MMBTA06_L98Z 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 management, analog, and discrete components for automotive, industrial, and cloud infrastructure markets.

The MMBTA06_L98Z belongs to ON Semiconductor's legacy general-purpose transistor product line, originally developed by Fairchild and optimized for cost-sensitive, high-reliability linear and switching applications in non-safety-critical systems.

FAQ

What is the maximum continuous collector current for MMBTA06_L98Z?

The MMBTA06_L98Z supports a maximum continuous collector current (I_C) of 500 mA at T_A = 25°C. Derating is required above 25°C at 2.8 mW/°C, meaning usable I_C decreases as ambient temperature rises-e.g., ~350 mA at 70°C ambient with proper PCB thermal relief. This rating applies under steady-state DC conditions, not pulsed operation.

Does MMBTA06_L98Z have a documented pinout for SOT-23 package?

Yes, the MMBTA06_L98Z uses standard SOT-23 pinout: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector, with top marking "1G". This configuration is confirmed in Fairchild's original MPSA06/MMBTA06/PZTA06 datasheet Rev. 1.1.0 and maintained in ON Semiconductor's cross-reference documentation for legacy Fairchild devices.

Can MMBTA06_L98Z replace MPSA06 in existing TO-92 designs?

No-MMBTA06_L98Z is not a drop-in replacement for MPSA06 due to fundamental package differences: MMBTA06_L98Z uses SOT-23 (surface-mount), while MPSA06 uses TO-92 (through-hole). PCB layout, thermal management, and assembly process must be redesigned. Electrical specs are closely matched, but mechanical incompatibility prevents direct substitution.

What is the typical DC current gain (h_FE) of MMBTA06_L98Z at 100 mA collector current?

The MMBTA06_L98Z guarantees h_FE ≥ 100 at I_C = 100 mA and V_CE = 1.0 V, per its official datasheet. Measured typical values range from 120 to 200 depending on unit variance and temperature. This ensures robust biasing in switching applications where minimum gain determines required base drive current.

Is MMBTA06_L98Z suitable for automotive applications?

MMBTA06_L98Z is not AEC-Q101 qualified and is not recommended for automotive safety-critical systems. It meets industrial-grade reliability standards (–55°C to +150°C T_J) and is widely used in non-safety automotive subsystems like cabin lighting controls and infotainment peripherals-but formal automotive qualification requires explicit AEC-Q101 test evidence not provided for this part.

MMBTA06_L98Z 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_L98Z FAQ

1.How can I place an order for MMBTA06_L98Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBTA06_L98Z 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_L98Z reliable?

The price and inventory of MMBTA06_L98Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA06_L98Z is usually 5 days.

3.What payment methods are accepted for MMBTA06_L98Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA06_L98Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBTA06_L98Z?

MMBTA06_L98Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBTA06_L98Z 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_L98Z?

For technical support, including MMBTA06_L98Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA06_L98Z requirements.

6.How does Aetrix verify that MMBTA06_L98Z is sourced from the original manufacturer or authorized distributors?

All MMBTA06_L98Z 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_L98Z meets industry standards.

7.What is the process for return or replacement of MMBTA06_L98Z?

All MMBTA06_L98Z units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA06_L98Z, 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_L98Z part is unused and in its original packaging.

Return procedure for MMBTA06_L98Z:

1.Submit a request within 90 days.

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

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