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

Nexperia USA Inc. MMBTA92-QR

Name: MMBTA92-QR
Brand: Nexperia USA Inc.
SKU: MMBTA92-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBTA92-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

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

Datasheet:: MMBTA92-QR.pdf

Description:: TRANS PNP 300V 0.1A TO-236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMBTA92-QR from Nexperia is a PNP bipolar junction transistor (BJT) designed for high-voltage switching and amplification in automotive-qualified SMT applications. It delivers V_CEO = −300 V, I_C = −100 mA, h_FE ≥ 25 at −1 mA, and operates up to T_j = 150 °C. It serves as a high-side switch or signal amplifier in telephony line interface circuits.

For engineers reviewing the MMBTA92-QR datasheet, MMBTA92-QR pinout, MMBTA92-QR application, or MMBTA92-QR equivalent, key selection criteria include its AEC-Q101 qualification, −300 V collector-emitter blocking capability, SOT23 footprint compatibility, and verified performance under pulsed DC conditions per IEC 60134 limiting values.

Technical Context

This discrete PNP BJT uses silicon planar epitaxial construction with a common-emitter configuration optimized for high-voltage, low-current switching. Its design emphasizes robustness under repetitive voltage stress, with guaranteed V_CBO = −300 V and V_EBO = −5 V, and thermal stability via R_th(j-a) = 500 K/W on FR4 PCB.

The device operates in linear or saturated mode with V_CE(sat) ≤ −500 mV at I_C = −20 mA / I_B = −2 mA, and supports f_T = 50 MHz at V_CE = −20 V / I_C = −10 mA - enabling use in audio-frequency amplification and pulse-width modulated control stages.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−300 V: Maximum safe collector-emitter reverse bias before breakdown; enables direct interface with 200–250 V telecom line voltages.
I_C	−100 mA continuous: Supports load switching up to ~100 mA DC or pulsed; sufficient for relay drivers and LED current sources.
h_FE	25–100 (typ.): Confirmed DC current gain at −1 mA and −10 mA; ensures predictable base drive sizing across operating range.
V_CE(sat)	≤ −500 mV at I_C = −20 mA / I_B = −2 mA: Low saturation voltage minimizes power loss and heating in switching applications.
f_T	50 MHz: Transition frequency confirms usable bandwidth for audio and low-speed digital signal conditioning.
R_th(j-a)	500 K/W: Thermal resistance on standard FR4 PCB defines maximum allowable power dissipation (250 mW) at ambient ≤ 25 °C.

Pinout & Package

SOT23 plastic surface-mount package: 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1.0 mm body; optimized for automated reflow assembly and wave soldering per IPC-7351 standards.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal requiring negative bias relative to emitter to enable conduction; drives with −2 mA yields −20 mA collector output.
2	Emitter (E)	Current source node; connected to higher potential (e.g., +V_CC) in high-side switch configurations.
3	Collector (C)	Output terminal handling −300 V reverse voltage; sinks current toward ground or lower-potential rail.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood and infotainment power control.
High-voltage blocking	−300 V V_CEO rating enables direct use in telephone line interface cards without external snubbers or voltage clamping.
Pulsed operation support	Specified h_FE, V_CE(sat), and f_T under pulsed conditions (t_p ≤ 300 µs, δ ≤ 0.02) ensure stable performance in PWM-driven loads.
Low leakage	I_CBO ≤ −250 nA at V_CB = −200 V ensures minimal standby current in always-on monitoring circuits.

Applications

Telephony Line Interface

Automotive Door Module Control

Use Scenario: Isolating and driving ring detection circuitry in analog telephone line cards handling −48 V nominal and −170 V ringing signals.

IC Role / Device Role / Timing Role: PNP high-side switch controlling optocoupler bias current during ring-signal presence detection.

Use Value: −300 V V_CEO withstands peak ringing voltage without breakdown; low I_CBO prevents false triggering during idle state.

Use Scenario: Driving small solenoids or LEDs in vehicle door latch and mirror control modules.

IC Role / Device Role / Timing Role: Discrete PNP switch providing local current sinking for 12 V/24 V automotive subsystems.

Use Value: AEC-Q101 qualification ensures operation over −40 °C to +125 °C ambient; SOT23 footprint enables compact layout in space-constrained modules.

Professional Audio Signal Conditioning

Industrial Sensor Bias Supply

Use Scenario: Amplifying low-level microphone signals in studio-grade preamplifier input stages.

IC Role / Device Role / Timing Role: Linear-mode PNP amplifier configured in common-emitter topology with emitter degeneration.

Use Value: h_FE ≥ 40 at −10 mA and f_T = 50 MHz support clean gain up to 20 kHz; low V_CE(sat) reduces distortion at signal peaks.

Use Scenario: Providing stable bias current to piezoresistive pressure sensors in HVAC or process control transmitters.

IC Role / Device Role / Timing Role: Constant-current source using emitter resistor feedback and base voltage reference.

Use Value: Tight h_FE consistency across batch and temperature ensures ±2% bias current stability; low ICBO maintains accuracy over 10-year field life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBTA92 (non-Q)	No AEC-Q101 qualification; identical electrical specs and SOT23 package.	Not approved for automotive production; acceptable for industrial or consumer prototypes.	Select when automotive qualification is unnecessary and cost sensitivity is high.
BC807-40-Q	Lower V_CEO (−45 V), higher h_FE (250–630), same AEC-Q101 grade.	Unsuitable for >−50 V applications but preferred for high-gain linear amplification below 45 V.	Choose only if voltage requirement is ≤−45 V and gain >250 is required.

Compared with MMBTA92-QR, the non-Q variant offers identical performance at lower cost but lacks automotive traceability; BC807-40-Q trades voltage headroom for much higher gain, making it incompatible in telecom or high-voltage industrial roles where −300 V blocking is mandatory.

Availability

MMBTA92-QR is available at Aetrix Electronics and suitable for telephony infrastructure, automotive body electronics, and professional audio equipment requiring stable component supply and AEC-Q101 compliance.

Supply support for MMBTA92-QR 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.

The MMBTA92-QR belongs to Nexperia's AEC-Q101-qualified general-purpose transistor product line, engineered specifically for high-voltage signal switching and amplification in automotive and telecom environments.

FAQ

Is MMBTA92-QR pin-compatible with MMBTA42-Q?

No. MMBTA92-QR is a PNP transistor with pinout Base–Emitter–Collector (1–2–3), while MMBTA42-Q is its NPN complement with identical SOT23 mechanical outline but reversed polarity and complementary pin function. Swapping them without circuit redesign causes functional failure.

What is the maximum safe continuous power dissipation for MMBTA92-QR on a standard PCB?

At T_amb = 25 °C on an FR4 board with single-sided 1 oz copper and standard SOT23 footprint, P_tot = 250 mW is the absolute maximum. Derating is required above 25 °C ambient - e.g., 180 mW at 70 °C - based on R_th(j-a) = 500 K/W and T_j(max) = 150 °C.

Does MMBTA92-QR support DC switching at full rated voltage and current?

No. The −300 V V_CEO and −100 mA I_C ratings are absolute maximums under short-duration pulsed conditions. For continuous DC operation, derating is required: typical design practice limits V_CE to ≤−200 V and I_C to ≤−50 mA to ensure long-term reliability and thermal margin.

Can MMBTA92-QR be used in avalanche mode?

No. The device is not characterized or rated for controlled avalanche operation. Its SOA curve does not specify avalanche energy capability, and operation beyond V_CEO risks irreversible junction damage. External clamping or snubbing is required for inductive load switching.

MMBTA92-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

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):: 100 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:: 250 mW

Frequency - Transition:: 50MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

MMBTA92-QR FAQ

1.How can I place an order for MMBTA92-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBTA92-QR 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 MMBTA92-QR reliable?

The price and inventory of MMBTA92-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA92-QR is usually 5 days.

3.What payment methods are accepted for MMBTA92-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA92-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBTA92-QR?

MMBTA92-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBTA92-QR 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 MMBTA92-QR?

For technical support, including MMBTA92-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA92-QR requirements.

6.How does Aetrix verify that MMBTA92-QR is sourced from the original manufacturer or authorized distributors?

All MMBTA92-QR 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 MMBTA92-QR meets industry standards.

7.What is the process for return or replacement of MMBTA92-QR?

All MMBTA92-QR units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA92-QR, 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 MMBTA92-QR part is unused and in its original packaging.

Return procedure for MMBTA92-QR:

1.Submit a request within 90 days.

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

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