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

Diodes Incorporated MMBTA92Q-7-F

Name: MMBTA92Q-7-F
Brand: Diodes Incorporated
SKU: MMBTA92Q-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBTA92Q-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: MMBTA92Q-7-F.pdf

Description:: TRANS PNP 300V 0.5A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:6,000

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Product details

Overview

MMBTA92Q-7-F from Diodes Incorporated is a 300V PNP small-signal transistor in SOT-23 package, rated for −300V V_CEO, −500mA I_C, and 300mW power dissipation, with h_FE = 25–40 at I_C = −1.0 to −30mA, used in medium-power switching and amplification circuits in automotive lighting control and industrial relay drivers.

For engineers reviewing the MMBTA92Q-7-F datasheet, MMBTA92Q-7-F pinout, MMBTA92Q-7-F application, or MMBTA92Q-7-F equivalent, key selection criteria include high-voltage PNP switching capability, AEC-Q101 qualification, SOT-23 thermal performance, and complementary pairing with MMBTA42 in push-pull stages.

Technical Context

This PNP bipolar junction transistor operates with reverse-biased collector-base and emitter-base junctions up to −300V and −5.0V respectively, supporting high-side switching in off-line and industrial DC supply rails. Its f_T = 50MHz enables stable gain in audio-frequency amplifiers and low-speed digital switching.

Thermal resistance R_θJA = 417°C/W reflects operation on minimal FR4 pad layout under still-air conditions; ESD ratings of 4kV HBM and 400V MM confirm robustness in automated assembly and field environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−300V - supports direct switching of 240VAC-derived DC bus without external snubbing
I_C	−500mA - drives relays, solenoids, and LED strings up to 10W at 24V
P_D	300mW - limits continuous dissipation to ≤150°C junction temperature on standard PCB
h_FE	25–40 @ I_C = −1–30mA - ensures reliable base drive margin in saturated switch mode
f_T	50MHz - maintains usable gain up to 10kHz square-wave switching with <10% distortion
V_CE(SAT)	−0.5V @ I_C = −20mA, I_B = −2mA - reduces conduction loss to <10mW in logic-level driven loads
ESD HBM	4,000V - withstands handling and board-level ESD per JEDEC JESD22-A114 Class 3A

Pinout & Package

SOT-23 plastic surface-mount package (3.0 × 1.4 × 1.1 mm), lead-free, halogen-free, RoHS-compliant, qualified to AEC-Q101 for automotive use.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal	Connected to positive rail in high-side switch configuration; requires current-limiting resistor when driven by MCU GPIO
2 (Base)	Control input	Accepts −2mA drive for full saturation; logic-level compatible with 3.3V/5V microcontrollers via series resistor
3 (Collector)	Current sink terminal	Connected to load return path; must maintain ≥3mm creepage distance from other traces in >250V applications

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive under-hood temperature cycling (−55°C to +150°C) and humidity exposure
High BV_CEO (−300V)	Enables direct interface with unregulated 240VAC rectified supplies without voltage divider or Zener clamp
Complementary NPN pairing	Matches MMBTA42 in V_CEO, I_C, and h_FE for matched push-pull amplifier stages
Green molding compound	UL 94V-0 rated, <900ppm Br/Cl, <1000ppm Sb - meets automotive material compliance requirements

Applications

Automotive Lighting Control

Industrial Relay Driver

Use Scenario: Switching 12V/24V LED headlamp modules in body control units.

IC Role / Device Role / Timing Role: High-side PNP switch controlling current flow from battery to LED anode.

Use Value: −300V rating prevents breakdown during load-dump transients (ISO 7637-2 Pulse 5a); AEC-Q101 ensures reliability over 15-year vehicle life.

Use Scenario: Driving 24VDC coil of industrial electromechanical relays.

IC Role / Device Role / Timing Role: Saturated switch providing low-loss current path to relay coil ground return.

Use Value: V_CE(SAT) ≤ −0.5V minimizes self-heating at 200mA coil current; SOT-23 footprint saves space vs. TO-92 in dense PLC I/O modules.

Off-Line Power Supply Bias

Audio Signal Amplifier Stage

Use Scenario: Providing bias current to primary-side controller ICs in flyback converters.

IC Role / Device Role / Timing Role: Constant-current source feeding V_CC pin of PWM IC from rectified AC line.

Use Value: BV_CBO > −300V allows direct connection to 265VAC peak without isolation; 300mW rating sustains 1mA bias at 200V.

Use Scenario: Low-noise preamplifier stage in automotive infotainment front-end.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with fixed bias network.

Use Value: f_T = 50MHz ensures flat gain response to 20kHz; h_FE stability across −55°C to +150°C maintains consistent audio fidelity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX951	V_CEO = −300V, I_C = −1A, h_FE = 100–300 - higher current, wider gain spread	TO-92 package; larger footprint and lower power density than SOT-23	Select for higher current loads (>500mA) where board space permits TO-92 mounting
BC807-40	V_CEO = −45V, I_C = −500mA, h_FE = 250–630 - lower voltage rating, higher gain	Not AEC-Q101 qualified; unsuitable for automotive transients or high-voltage rails	Choose only for non-automotive 24V systems requiring tighter h_FE tolerance and lower V_CE(SAT)

Compared with ZTX951 and BC807-40, MMBTA92Q-7-F uniquely balances AEC-Q101 compliance, −300V blocking, SOT-23 compactness, and predictable h_FE range-making it optimal for space-constrained automotive and industrial high-voltage switching where reliability and footprint matter.

Availability

MMBTA92Q-7-F is available at Aetrix Electronics and suitable for automotive lighting control, industrial relay drivers, off-line power supply bias circuits, and audio signal amplifier stages requiring stable component supply and long-term lifecycle support.

Supply support for MMBTA92Q-7-F 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The MMBTA92Q-7-F belongs to Diodes' AEC-Q101-qualified small-signal transistor product line, engineered specifically for high-reliability automotive and industrial switching applications demanding extended temperature operation and high-voltage robustness.

FAQ

Is MMBTA92Q-7-F pin-compatible with MMBTA92-7-F?

Yes - both share identical SOT-23 pinout (Emitter-Base-Collector on pins 1-2-3), same electrical specifications, and identical marking code K3R. The "Q" suffix denotes AEC-Q101 qualification and automotive PPAP capability, while retaining full form-fit-function compatibility with standard MMBTA92 variants.

What is the maximum safe operating voltage for MMBTA92Q-7-F in switching mode?

The absolute maximum V_CEO is −300V, but for reliable long-term operation in switching applications, Diodes recommends limiting V_CE to ≤ −240V under transient conditions (e.g., ISO 7637-2 Pulse 5a) and ≤ −200V under steady-state DC, maintaining ≥20% voltage margin per AEC-Q101 stress guidelines.

Can MMBTA92Q-7-F replace BCW68G in existing designs?

No - BCW68G is an NPN transistor (V_CEO = +80V), while MMBTA92Q-7-F is PNP with −300V rating. Direct replacement would invert circuit polarity and violate biasing requirements. For PNP equivalents to BCW68G, consider BCW61C (V_CEO = −60V), not MMBTA92Q-7-F.

Does MMBTA92Q-7-F require heatsinking in 300mW operation?

No - at 300mW dissipation on a standard 1oz copper FR4 PCB with minimum recommended pad layout, junction temperature rise is ~125°C above ambient (R_θJA = 417°C/W), keeping T_J ≤ 150°C at T_A ≤ 25°C. Heatsinking is unnecessary unless ambient exceeds 25°C or PCB copper area is reduced below spec.

MMBTA92Q-7-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 300 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 2mA, 20mA

Current - Collector Cutoff (Max):: 250nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 40 @ 10mA, 10V

Power - Max:: 300 mW

Frequency - Transition:: 50MHz

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

MMBTA92Q-7-F FAQ

1.How can I place an order for MMBTA92Q-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBTA92Q-7-F 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 MMBTA92Q-7-F reliable?

The price and inventory of MMBTA92Q-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA92Q-7-F is usually 5 days.

3.What payment methods are accepted for MMBTA92Q-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA92Q-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBTA92Q-7-F?

MMBTA92Q-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBTA92Q-7-F 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 MMBTA92Q-7-F?

For technical support, including MMBTA92Q-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA92Q-7-F requirements.

6.How does Aetrix verify that MMBTA92Q-7-F is sourced from the original manufacturer or authorized distributors?

All MMBTA92Q-7-F 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 MMBTA92Q-7-F meets industry standards.

7.What is the process for return or replacement of MMBTA92Q-7-F?

All MMBTA92Q-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA92Q-7-F, 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 MMBTA92Q-7-F part is unused and in its original packaging.

Return procedure for MMBTA92Q-7-F:

1.Submit a request within 90 days.

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

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