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

onsemi MMBT2369ALT1

Name: MMBT2369ALT1
Brand: onsemi
SKU: MMBT2369ALT1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBT2369ALT1

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: -

Datasheet:: MMBT2369ALT1.pdf

Description:: TRANS SS GP NPN 15V SOT23

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMBT2369ALT1 from onsemi is an NPN silicon switching transistor in SOT-23 package, rated for 40 V_CE, 200 mA continuous collector current, and 0.20 V_CE(sat) at I_C = 10 mA / I_B = 1 mA. It delivers fast switching with t_on ≤ 12 ns and t_off ≤ 18 ns, and is AEC-Q101 qualified for automotive signal routing and load control applications.

For engineers reviewing the MMBT2369ALT1 datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal derating behavior, junction-to-ambient resistance (417 °C/W on alumina), and validated alternatives for discrete BJT replacement in space-constrained, high-reliability designs.

Technical Context

This device operates as a general-purpose NPN bipolar junction transistor optimized for low-voltage, medium-speed switching. Its V_CEO = 15 V and V_CES = 40 V support operation across rail voltages up to 3.3 V and 5 V logic domains while maintaining safe margin against transients.

Designed for surface-mount use in FR-5 and alumina substrates, it exhibits defined thermal performance: 300 mW dissipation at 25 °C on alumina with 2.4 mW/°C derating, and R_JA = 417 °C/W - enabling predictable junction temperature estimation in thermally constrained PCB layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	15 Vdc - Maximum safe collector-emitter voltage under open-base conditions; defines upper rail limit for logic-level switching.
I_C (continuous)	200 mAdc - Continuous DC collector current capability; supports driving small relays, LEDs, or gate capacitance of downstream MOSFETs.
V_CE(sat)	0.20 Vdc @ I_C=10 mA/I_B=1 mA - Low saturation voltage minimizes conduction loss and self-heating in on-state operation.
t_off	18 ns max - Fast turn-off time enables reliable operation in PWM circuits up to ~20 MHz fundamental frequency.
h_FE	40–120 @ I_C=10 mA/V_CE=1.0 V - Moderate DC gain range ensures stable base drive design without excessive overdrive.
R_JA	417 °C/W on alumina - Enables thermal modeling for 100 °C max ambient operation with ≤150 °C junction temperature.
C_obo	4.0 pF max @ V_CB=5 V - Low output capacitance preserves high-frequency response and reduces Miller effect in switching nodes.

Pinout & Package

SOT-23 (TO-236) package, 2.90 mm × 1.30 mm × 1.00 mm body size, lead pitch 1.90 mm, Pb-free and RoHS compliant. Marking includes date code and "M" for Pb-free variant.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal; requires ≥0.7 V_BE(sat) and sufficient I_B to achieve specified V_CE(sat) and h_FE.
2	Emitter	Current return path; connected to ground or low-side reference in common-emitter configurations.
3	Collector	Output terminal; connects to load and supply rail; handles full switched current and transient energy.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47.
Pb-free, halogen-free/BFR-free	Complies with RoHS Directive 2011/65/EU and JEDEC JS709C; compatible with lead-free reflow profiles.
Low V_CE(sat) at 10 mA	0.20 Vdc enables <1 mW conduction loss at 10 mA, reducing thermal load in battery-powered sensor nodes.
Fast switching (t_on/t_off)	≤12 ns / ≤18 ns allows clean edge transitions in 5 V digital interface buffering and pulse generation.
High f_T (typ. 250 MHz)	Small-signal current gain bandwidth supports RF predriver and broadband amplifier use up to ~100 MHz.

Applications

Automotive Door Module Control	Industrial PLC Input Conditioning
Use Scenario: Switching 12 V solenoid loads in door lock actuators using microcontroller GPIO. IC Role / Device Role / Timing Role: Discrete NPN switch providing level translation and current gain between 3.3 V MCU and inductive load. Use Value: 0.20 V_CE(sat) limits power dissipation to <2 mW during actuation, preventing thermal shutdown in sealed modules.	Use Scenario: Converting 24 V industrial field signals to 5 V logic levels for FPGA input capture. IC Role / Device Role / Timing Role: High-speed signal translator with fast t_off ≤18 ns ensuring accurate timing capture of 100 kHz pulse trains. Use Value: 4.0 pF C_obo and 250 MHz f_T preserve signal integrity and minimize propagation delay skew.
USB-C Power Path Enable	Medical Sensor Signal Buffering
Use Scenario: Enabling/disabling 5 V USB-C VBUS path via MCU-controlled switch in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-loss, fast-turnoff switch placed in series with VBUS line to meet USB PD specification timing requirements. Use Value: 18 ns t_off ensures VBUS disconnect within 200 ns of control signal deassertion, meeting safety-critical fault response windows.	Use Scenario: Isolating analog front-end outputs from noisy digital subsystems in wearable ECG monitors. IC Role / Device Role / Timing Role: Emitter-follower buffer stage providing low-output-impedance drive to ADC input without loading sensitive sensor nodes. Use Value: h_FE ≥40 at 3 mA ensures stable biasing with minimal base current draw, extending battery life in ultra-low-power modes.

Automotive Door Module Control

Industrial PLC Input Conditioning

Use Scenario: Switching 12 V solenoid loads in door lock actuators using microcontroller GPIO.

IC Role / Device Role / Timing Role: Discrete NPN switch providing level translation and current gain between 3.3 V MCU and inductive load.

Use Value: 0.20 V_CE(sat) limits power dissipation to <2 mW during actuation, preventing thermal shutdown in sealed modules.

Use Scenario: Converting 24 V industrial field signals to 5 V logic levels for FPGA input capture.

IC Role / Device Role / Timing Role: High-speed signal translator with fast t_off ≤18 ns ensuring accurate timing capture of 100 kHz pulse trains.

Use Value: 4.0 pF C_obo and 250 MHz f_T preserve signal integrity and minimize propagation delay skew.

USB-C Power Path Enable

Medical Sensor Signal Buffering

Use Scenario: Enabling/disabling 5 V USB-C VBUS path via MCU-controlled switch in portable diagnostic devices.

IC Role / Device Role / Timing Role: Low-loss, fast-turnoff switch placed in series with VBUS line to meet USB PD specification timing requirements.

Use Value: 18 ns t_off ensures VBUS disconnect within 200 ns of control signal deassertion, meeting safety-critical fault response windows.

Use Scenario: Isolating analog front-end outputs from noisy digital subsystems in wearable ECG monitors.

IC Role / Device Role / Timing Role: Emitter-follower buffer stage providing low-output-impedance drive to ADC input without loading sensitive sensor nodes.

Use Value: h_FE ≥40 at 3 mA ensures stable biasing with minimal base current draw, extending battery life in ultra-low-power modes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC846BLT1G	Higher V_CEO = 65 V, lower h_FE min = 200, same SOT-23 package and pinout (Style 6).	Preferred where higher breakdown margin is required, e.g., 24 V industrial systems with inductive kickback.	Select BC846BLT1G when >40 V transient immunity is needed; verify base drive compatibility due to higher h_FE.
PN2222A-AP	TO-92 package, V_CEO = 40 V, h_FE = 100–300, slower t_off = 250 ns, not AEC-Q101 qualified.	Suitable for prototyping or non-automotive cost-sensitive applications where manual assembly is acceptable.	Choose PN2222A-AP only for non-automotive, non-SMT designs; avoid where AEC-Q101 compliance or fast switching is mandatory.

Compared with BC846BLT1G and PN2222A-AP, the MMBT2369ALT1 offers balanced speed (18 ns t_off), automotive qualification, and optimal V_CE(sat) for 3.3/5 V logic interfacing - making it the preferred choice for production-grade SMT switching in automotive and industrial edge nodes.

Availability

MMBT2369ALT1 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC input stages, USB-C power path control, and medical sensor buffering requiring stable component supply and long-term manufacturability.

Supply support for MMBT2369ALT1 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The MMBT2369ALT1 belongs to onsemi's general-purpose bipolar transistor product line, engineered for high-reliability, space-constrained switching in automotive and industrial control systems where AEC-Q101 compliance and consistent parametric performance are critical.

FAQ

What is the maximum operating temperature for MMBT2369ALT1?

The MMBT2369ALT1 has a junction and storage temperature range of −55 °C to +150 °C. When mounted on an alumina substrate, its 300 mW power dissipation at 25 °C derates by 2.4 mW/°C above ambient - allowing safe operation up to +125 °C case temperature with appropriate thermal design. The MMBT2369ALT1 must be operated within these limits to maintain AEC-Q101 reliability.

Is MMBT2369ALT1 pin-compatible with MMBT2222ALT1?

No, the MMBT2369ALT1 is not pin-compatible with MMBT2222ALT1. While both use SOT-23 packages, the MMBT2222ALT1 follows Style 7 (Emitter/Base/Collector), whereas the MMBT2369ALT1 uses Style 6 (Base/Emitter/Collector). Swapping them without layout revision will reverse emitter and base connections, causing circuit failure. Always verify pinout per onsemi's mechanical drawings before substitution.

Does MMBT2369ALT1 support 3.3 V microcontroller direct drive?

Yes, the MMBT2369ALT1 supports direct drive from 3.3 V microcontrollers. With V_BE(sat) ≤ 0.85 V at I_C = 10 mA / I_B = 1 mA, a 3.3 V GPIO can easily provide sufficient base voltage and current through a 2.2 kΩ resistor. Its h_FE ≥ 40 ensures adequate current gain, and the MMBT2369ALT1 remains fully saturated without requiring level-shifting circuitry.

What is the typical transition frequency (f_T) of MMBT2369ALT1?

The MMBT2369ALT1 has a typical transition frequency f_T of 250 MHz at I_C = 10 mA and V_CE = 10 V, as inferred from its small-signal current gain h_fe = 5.0 at 100 MHz. This f_T value confirms suitability for RF predriver, broadband amplification, and high-speed digital signal conditioning - all within the operational envelope of the MMBT2369ALT1.

How does MMBT2369ALT1 differ from MMBT2369LT1G?

The MMBT2369ALT1 differs from MMBT2369LT1G primarily in DC current gain and saturation voltage: the "A" suffix denotes higher h_FE (min 40 vs. unspecified for standard version) and lower V_CE(sat) (0.20 V vs. 0.25 V). Both share identical packaging, ratings, and AEC-Q101 qualification, but the MMBT2369ALT1 is optimized for tighter gain control and lower conduction loss in precision switching applications.

MMBT2369ALT1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: *

Package/Case:: -

Packaging:: Cut Tape (CT)

Product Status:: Obsolete

Transistor Type:: -

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

Voltage - Collector Emitter Breakdown (Max):: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Power - Max:: -

Frequency - Transition:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

MMBT2369ALT1 FAQ

1.How can I place an order for MMBT2369ALT1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBT2369ALT1 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 MMBT2369ALT1 reliable?

The price and inventory of MMBT2369ALT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBT2369ALT1 is usually 5 days.

3.What payment methods are accepted for MMBT2369ALT1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBT2369ALT1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBT2369ALT1?

MMBT2369ALT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBT2369ALT1 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 MMBT2369ALT1?

For technical support, including MMBT2369ALT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBT2369ALT1 requirements.

6.How does Aetrix verify that MMBT2369ALT1 is sourced from the original manufacturer or authorized distributors?

All MMBT2369ALT1 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 MMBT2369ALT1 meets industry standards.

7.What is the process for return or replacement of MMBT2369ALT1?

All MMBT2369ALT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBT2369ALT1, 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 MMBT2369ALT1 part is unused and in its original packaging.

Return procedure for MMBT2369ALT1:

1.Submit a request within 90 days.

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

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