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Diodes Incorporated FMMTA92TA
- Part No.:
- FMMTA92TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
FMMTA92TA.pdf
- Description:
- TRANS PNP 300V 0.2A SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:11,696
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Product details
Overview
FMMTA92TA from Diodes Incorporated is a PNP bipolar junction transistor in SOT23 package, rated for -300V collector-emitter breakdown voltage (BVCEO), -200mA continuous collector current (IC), and -0.5V saturation voltage (VCE(sat)) at IC = -20mA/IB = -2mA. It serves as a high-voltage switching element in flyback snubbers, relay drivers, and industrial power supply protection circuits.
For engineers reviewing the FMMTA92TA datasheet, FMMTA92TA pinout, FMMTA92TA application, or FMMTA92TA equivalent, key selection criteria include verified -300V BVCEO, SOT23 thermal resistance (RθJA = 403°C/W on minimal pad), hFE range of 25–250 at IC = -1mA to -30mA, ESD HBM rating of 4kV, and complementary pairing with FMMTA42.
Technical Context
This PNP transistor operates in linear or saturated switching mode with guaranteed breakdown at -300V across both collector-base (BVCBO) and collector-emitter (BVCEO) terminals. Its fT of 50MHz supports moderate-speed switching up to ~100kHz in hard-switched topologies.
Designed for high-voltage isolation, it features low leakage (ICES ≤ -250nA at VCE = -200V) and robust thermal performance: RθJL = 350°C/W enables localized heat transfer to PCB copper, critical in compact SOT23 layouts where ambient convection is limited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BVCEO | -300V - Ensures safe operation in 230VAC-derived bus rails with margin against transients |
| IC (continuous) | -200mA - Supports relay coil drive and small-signal HV switching without derating below 70°C ambient |
| VCE(sat) | -0.5V @ IC=-20mA/IB=-2mA - Limits conduction loss to ≤10mW in saturated switch applications |
| hFE | 25–250 - Provides stable DC gain across operating range; usable for base-current-limited switching control |
| fT | 50MHz - Enables reliable turn-off in pulse-width modulated HV gate drivers up to 100kHz |
| ESD HBM | 4,000V - Meets IEC 61000-4-2 Level 3 for handling without special precautions |
| RθJA | 403°C/W - Requires ≥15mm² 1oz copper pad for full 310mW power dissipation at TA = 25°C |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with 3-pin configuration, 0.008g mass, UL 94V-0 flammability rating, and matte tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E (Emitter) | Current source terminal | Connected to positive rail in high-side switch configurations; sets reference for base bias network |
| B (Base) | Control input | Receives negative current to enable conduction; requires series resistor to limit IB ≤ -2mA for full saturation |
| C (Collector) | Switched output | Drives inductive loads (e.g., relay coils); must include flyback diode due to -300V reverse recovery capability |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage blocking | Guaranteed -300V BVCEO supports direct interface with 230VAC rectified outputs without external clamping |
| SOT23 footprint compatibility | Standardized 3-pin layout enables drop-in replacement in space-constrained industrial control PCBs |
| Lead-free & green compliance | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets RoHS 3 and automotive AQG324 requirements |
| Complementary pairing | Matched electrical specs with FMMTA42 (NPN) simplify push-pull driver design in HV logic interfaces |
Applications
| Industrial Relay Drivers | AC-DC Flyback Snubbers |
|---|---|
Use Scenario: Driving 12–24VDC relays from microcontroller GPIOs in PLC I/O modules. IC Role / Device Role / Timing Role: High-side PNP switch controlling relay coil current path to ground. Use Value: -300V BVCEO withstands inductive kickback spikes exceeding 150V, eliminating need for external TVS. | Use Scenario: Clamping voltage spikes across transformer primary windings in offline flyback converters. IC Role / Device Role / Timing Role: Fast-turn-off PNP clamp activated during MOSFET off-time to absorb leakage energy. Use Value: 50MHz fT ensures sub-20ns turn-on delay, capturing >95% of spike energy before core saturation. |
| High-Voltage Logic Level Shifting | Overvoltage Protection Circuits |
Use Scenario: Translating 3.3V/5V logic signals to control 100–200V DC bus switches in battery management systems. IC Role / Device Role / Timing Role: Level-shifting interface between low-voltage controller and HV gate driver stage. Use Value: -0.5V VCE(sat) minimizes voltage drop across switch, preserving headroom for downstream gate threshold margins. | Use Scenario: Monitoring DC bus voltage and disconnecting load when overvoltage threshold is exceeded. IC Role / Device Role / Timing Role: Sensing circuit trigger element that activates crowbar or shutdown path upon fault detection. Use Value: -250nA ICES at -200V ensures negligible standby current drain in always-on monitoring circuits. |
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 |
|---|---|---|---|
| MMBT92A | BVCEO = -300V, but hFE min = 100 only at IC = -10mA; no specified fT | Lacks documented 50MHz fT; less suitable for fast-switching snubber use | Prefer FMMTA92TA where switching speed or guaranteed gain at low IC is required |
| ZTX951 | TO-92 package; BVCEO = -300V, IC = -500mA, but RθJA = 200°C/W - larger thermal footprint needed | Through-hole mounting; incompatible with SOT23-reflow assembly | Select ZTX951 only if higher current or manual assembly is acceptable |
Compared with MMBT92A and ZTX951, FMMTA92TA uniquely combines SOT23 miniaturization, verified 50MHz fT, and guaranteed hFE down to -1mA - making it optimal for space-constrained, medium-frequency HV switching where thermal and layout constraints dominate.
Availability
FMMTA92TA is available at Aetrix Electronics and suitable for industrial relay drivers, AC-DC flyback snubbers, and high-voltage logic level shifting requiring stable component supply across production lifecycles.
Supply support for FMMTA92TA 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 centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The FMMTA92TA belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for industrial power conversion, protection, and control applications demanding robustness above 200V DC.
FAQ
What is the maximum safe operating voltage for FMMTA92TA in continuous DC applications?
The absolute maximum collector-emitter voltage (VCEO) is -300V, verified under pulsed conditions per JEDEC JESD78. For continuous DC operation, design margin requires limiting VCE to ≤ -240V to ensure long-term reliability under thermal stress and voltage aging effects, especially at elevated ambient temperatures above 70°C.
Can FMMTA92TA replace FMMTA42 in a circuit?
No - FMMTA92TA is a PNP transistor while FMMTA42 is its NPN complement. Swapping them would invert logic polarity and likely cause latch-up or open-circuit failure. They are designed for paired use in push-pull or complementary driver stages, not as direct substitutes.
Is FMMTA92TA qualified for automotive applications?
The standard FMMTA92TA is not AEC-Q101 qualified. However, Diodes offers the automotive-grade variant FMMTA92Q, which undergoes extended temperature cycling (-40°C to +150°C), HTOL, and ESD testing per AEC-Q101 Rev D. Use FMMTA92Q for automotive body control or infotainment power stages.
What PCB layout practices improve thermal performance of FMMTA92TA in SOT23?
Maximize copper area connected to the collector pad: use ≥15mm² of 1oz copper to achieve the 357°C/W RθJA rating. Avoid thermal relief spokes; connect collector directly to internal ground/power planes via multiple vias. Maintain ≥0.5mm clearance from adjacent high-voltage traces to prevent creepage failure at -300V.
FMMTA92TA 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:
- 25 @ 30mA, 10V
- Power - Max:
- 330 mW
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
FMMTA92TA FAQ
1.How can I place an order for FMMTA92TA through Aetrix?
Please submit a Request for Quotation (RFQ) for FMMTA92TA 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 FMMTA92TA reliable?
The price and inventory of FMMTA92TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMTA92TA is usually 5 days.
3.What payment methods are accepted for FMMTA92TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMTA92TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FMMTA92TA?
FMMTA92TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FMMTA92TA 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 FMMTA92TA?
For technical support, including FMMTA92TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMTA92TA requirements.
6.How does Aetrix verify that FMMTA92TA is sourced from the original manufacturer or authorized distributors?
All FMMTA92TA 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 FMMTA92TA meets industry standards.
7.What is the process for return or replacement of FMMTA92TA?
All FMMTA92TA units undergo pre-shipment inspection (PSI). If there is an issue with FMMTA92TA, 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 FMMTA92TA part is unused and in its original packaging.
Return procedure for FMMTA92TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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