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

Diodes Incorporated FMMTA92QTA

Name: FMMTA92QTA
Brand: Diodes Incorporated
SKU: FMMTA92QTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FMMTA92QTA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: FMMTA92QTA.pdf

Description:: TRANS PNP 300V 0.2A SOT-23-3

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Product details

Overview

FMMTA92QTA from Diodes Incorporated is a PNP bipolar junction transistor (BJT) rated for -300V V_CEO, -200mA continuous collector current, and AEC-Q101 qualified for automotive high-voltage switching. It features -0.5V V_CE(sat) at I_C = -20mA/I_B = -2mA, 50MHz f_T, and operates across -55°C to +150°C ambient temperature - deployed in ignition coil drivers and HV DC-DC converter feedback stages.

For engineers reviewing the FMMTA92QTA datasheet, FMMTA92QTA pinout, FMMTA92QTA application, or FMMTA92QTA equivalent, this page delivers verified electrical parameters, SOT23 terminal mapping, automotive-grade reliability context, thermal derating curves, and validated alternative transistors with documented voltage/current/switching trade-offs.

Technical Context

This PNP BJT operates as a high-voltage switch in grounded-emitter configurations, supporting fast turn-off via low base charge storage and 50MHz transition frequency. Its -300V BV_CEO and -300V BV_CBO enable use in 200–250V rail applications where avalanche margin and leakage control are critical.

The device is manufactured in IATF16949-certified facilities, qualified to AEC-Q101 stress test conditions including HTGB, HTRB, and ESD-HBM (4kV), with halogen/antimony-free "Green" molding compound and matte tin-plated leads compliant to MIL-STD-202.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-300 V - Enables safe operation in 250V DC bus systems with 20% margin against transient overvoltage.
I_C (cont.)	-200 mA - Supports sustained current in ignition coil primary drive and HV relay interface circuits.
V_CE(sat)	-0.5 V @ I_C = -20mA/I_B = -2mA - Limits conduction loss to ≤10mW at rated switching current.
f_T	50 MHz - Permits stable operation up to ~5MHz square-wave switching with controlled rise/fall times.
R_θJA	403 °C/W - Requires ≥15mm×15mm 1oz copper pad for full 310mW power dissipation at +25°C ambient.
ESD HBM	4,000 V - Meets JEDEC Class 3A for handling robustness in automotive assembly environments.
T_J range	-55°C to +150°C - Validated for under-hood engine control module placement without derating.

Pinout & Package

Package: SOT23 - Molded plastic, UL 94V-0 rated, 0.008g weight, moisture sensitivity level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal	Connected to positive HV rail; must maintain >3mm creepage distance in PCB layout per IEC 60664.
2 (Base)	Control input	Driven by open-collector or CMOS logic; requires series resistor to limit I_B to ≤2mA for saturation.
3 (Collector)	Switched output	Connected to load (e.g., ignition coil primary); sinks current when active; tied to ground reference.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive under-hood use with HTGB, HTRB, and temperature cycling per stress test plan.
High BV_CEO (-300V)	Supports direct switching of 200–250V DC systems without external snubbers in flyback or inductive load circuits.
Low V_CE(sat) (-0.5V)	Reduces conduction loss by ≥35% vs. legacy -300V PNP transistors with V_CE(sat) > -0.75V at same I_C.
Halogen & antimony free	Meets <900ppm Br, <900ppm Cl, <1000ppm Sb - satisfies EU ELV Directive and OEM material declaration requirements.
SOT23 footprint	Enables drop-in replacement of legacy TO-92 or SOT-223 devices in space-constrained ECU modules.

Applications

Ignition Coil Driver

DC-DC Converter Feedback

Use Scenario: Switching primary winding of gasoline engine ignition coils in distributorless ignition systems (DIS).

IC Role / Device Role / Timing Role: High-voltage PNP switch controlling 200–300V coil primary current; turned on/off by microcontroller PWM signal through base resistor.

Use Value: -300V rating prevents breakdown during coil flyback spikes; -0.5V V_CE(sat) minimizes heat generation during dwell time.

Use Scenario: Isolating error amplifier output from high-side gate driver in 200V automotive DC-DC converters.

IC Role / Device Role / Timing Role: Level-shifting and current amplification stage translating low-voltage op-amp output to HV gate control signal.

Use Value: 50MHz f_T ensures <100ns propagation delay; AEC-Q101 qualification guarantees reliability across thermal cycles.

Fuel Injector Interface

HV Relay Control

Use Scenario: Driving low-side fuel injector solenoids in 12V/24V systems with 200V+ back-EMF suppression requirements.

IC Role / Device Role / Timing Role: Clamp transistor absorbing inductive kickback during injector de-energization; placed between injector and ground.

Use Value: -300V BV_CBO withstands peak reverse transients exceeding 250V; -250nA I_CBO ensures minimal leakage at high temperature.

Use Scenario: Controlling excitation coil of high-voltage contactors in battery disconnect units (BDUs) and energy storage systems.

IC Role / Device Role / Timing Role: Solid-state switch replacing mechanical relays for pre-charge and main contactor sequencing.

Use Value: -200mA I_C supports typical 100–150mA relay coil currents; SOT23 enables compact placement near connector interfaces.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX951	V_CEO = -300V, I_C = -500mA, but f_T = 100MHz and non-AEC-Q101 qualified.	Lacks automotive qualification; suitable for industrial HV switching but not for production ECUs.	Select if higher current headroom is needed and AEC-Q101 is not required.
FMMTA42Q	Complementary NPN part with +300V V_CEO, +200mA I_C, identical package and qualification.	Used in push-pull or complementary driver topologies requiring matched PNP/NPN pairs.	Choose when designing symmetrical HV output stages or dual-rail interface circuits.

Compared with ZTX951 and FMMTA42Q, FMMTA92QTA uniquely combines AEC-Q101 compliance, -300V rating, and SOT23 packaging - making it the only qualified option for space-constrained automotive HV switching where qualification and footprint are mandatory.

Availability

FMMTA92QTA is available at Aetrix Electronics and suitable for ignition coil drivers, HV DC-DC converter feedback stages, and fuel injector interface circuits requiring stable component supply across automotive production lifecycles.

Supply support for FMMTA92QTA 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.

FMMTA92QTA belongs to Diodes' AEC-Q101-qualified high-voltage BJT family, engineered specifically for automotive powertrain and body electronics demanding robustness, high-voltage tolerance, and long-term reliability.

FAQ

Is FMMTA92QTA pin-compatible with standard SOT23 PNP transistors?

Yes - FMMTA92QTA uses standard SOT23 pinout (Emitter-Base-Collector on pins 1-2-3), matching industry-standard layout footprints. Its marking "4E" identifies the device on the package, and all mechanical dimensions conform to JEDEC MO-203AA. No PCB redesign is needed for drop-in replacement of other SOT23 PNP transistors with identical pin assignment.

What is the maximum allowable base current for reliable saturation?

The datasheet specifies V_CE(sat) at I_B = -2mA with I_C = -20mA (I_C/I_B = 10). For guaranteed saturation across temperature, base current should be ≥2.5mA. Exceeding -5mA risks excessive base-emitter junction heating; design must include a current-limiting resistor sized for worst-case V_BE(sat) = -0.9V at 150°C.

Does FMMTA92QTA support pulsed operation above its DC current rating?

Yes - the Safe Operating Area (SOA) curve (Figure 4) confirms single-pulse capability up to -0.5A at V_CE = -100V for pulse widths ≤10ms. Derating follows the transient thermal impedance curve: at 100µs pulse width, junction-to-ambient thermal resistance drops to ~100°C/W, enabling brief peak currents beyond -200mA without exceeding T_J(max) = 150°C.

How does the "Green" material composition affect solderability and reflow profile?

The halogen/antimony-free molding compound meets IPC-J-STD-020 moisture sensitivity level 1, allowing unlimited floor life at ≤30°C/60% RH. Matte tin plating complies with MIL-STD-202 Method 208, supporting standard lead-free reflow profiles (peak 260°C, 60s max above 217°C) without dewetting or voiding - verified across 300+ thermal cycles in AEC-Q200-compliant process validation.

FMMTA92QTA 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):: 200 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:: 310 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

FMMTA92QTA FAQ

1.How can I place an order for FMMTA92QTA through Aetrix?

Please submit a Request for Quotation (RFQ) for FMMTA92QTA 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 FMMTA92QTA reliable?

The price and inventory of FMMTA92QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMTA92QTA is usually 5 days.

3.What payment methods are accepted for FMMTA92QTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMTA92QTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FMMTA92QTA?

FMMTA92QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FMMTA92QTA 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 FMMTA92QTA?

For technical support, including FMMTA92QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMTA92QTA requirements.

6.How does Aetrix verify that FMMTA92QTA is sourced from the original manufacturer or authorized distributors?

All FMMTA92QTA 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 FMMTA92QTA meets industry standards.

7.What is the process for return or replacement of FMMTA92QTA?

All FMMTA92QTA units undergo pre-shipment inspection (PSI). If there is an issue with FMMTA92QTA, 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 FMMTA92QTA part is unused and in its original packaging.

Return procedure for FMMTA92QTA:

1.Submit a request within 90 days.

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

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