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Diodes Incorporated FZTA92TC
- Part No.:
- FZTA92TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZTA92TC.pdf
- Description:
- TRANS PNP 300V 0.5A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,852
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Product details
Overview
FZTA92 from Diodes Incorporated is an obsolete PNP silicon planar high-voltage transistor in SOT223 package, rated for VCEO = –150 V, IC = –500 mA, and PD = 1 W at TA = 25°C, used in automotive voltage regulation and industrial switching circuits where high breakdown voltage and moderate current handling are required.
For engineers reviewing the FZTA92 datasheet, FZTA92 pinout, FZTA92 application, or FZTA92 equivalent, key selection considerations include its PNP polarity, −150 V collector–emitter blocking capability, SOT223 thermal performance, AEC-Q101 qualification status, and direct replacement path to DZTA92.
Technical Context
The FZTA92 is a discrete high-voltage PNP bipolar junction transistor designed for linear and switching operation in automotive and industrial power control. Its structure supports stable DC current gain (hFE = 25–100 at IC = −10 mA, VCE = −5 V) and low saturation voltage (VCE(sat) ≤ −0.5 V at IC = −500 mA, IB = −50 mA).
It operates with a maximum junction temperature of 150°C and features a TO-223-compatible SOT223 package with emitter-tab grounding for thermal dissipation. The device is qualified per AEC-Q101 and manufactured in IATF 16949-certified facilities, confirming suitability for automotive-grade reliability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −150 V: Maximum reverse-biased collector–emitter voltage before avalanche breakdown; enables use in high-side switch or flyback snubber circuits. |
| IC | −500 mA: Continuous DC collector current rating; defines safe operating area for sustained load switching. |
| PD | 1 W at TA = 25°C: Power dissipation limit under free-air conditions; requires heatsinking above ambient temperatures. |
| hFE | 25–100 at IC = −10 mA, VCE = −5 V: DC current gain range; determines base drive sizing for saturated switching. |
| VCE(sat) | ≤ −0.5 V at IC = −500 mA, IB = −50 mA: Low saturation voltage ensures minimal conduction loss in on-state. |
| TJ(max) | 150°C: Maximum junction temperature; sets thermal design margin for PCB layout and enclosure airflow. |
Pinout & Package
SOT223 package with 4-terminal configuration: three leads plus exposed emitter tab (pin 2) for thermal and electrical connection. Standard pin assignment verified per Diodes DS33194 Rev. 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input | Receives forward-biased base current to turn on PNP conduction; requires current-limiting resistor in series. |
| 2 (Emitter) | Common reference terminal | Connected to system ground or high-side rail; tab provides low-thermal-resistance path to PCB copper. |
| 3 (Collector) | Power output node | Carries load current from emitter to external circuit; reverse-biased during off-state up to −150 V. |
| 4 (Emitter Tab) | Thermal & electrical emitter extension | Electrically tied to pin 2; soldered to large copper pour for enhanced heat transfer and mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage PNP architecture | Supports −150 V blocking in high-side configurations without external level-shifting circuitry. |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics requiring stress-tested reliability. |
| SOT223 thermal design | Enables 1 W dissipation with standard PCB copper area; eliminates need for discrete heatsink in many industrial controls. |
| Low VCE(sat) | Reduces conduction losses below 250 mW at full rated current, improving efficiency in 12 V/24 V battery systems. |
Applications
| Automotive Voltage Regulator | Industrial Relay Driver |
|---|---|
Use Scenario: Regulating auxiliary 12 V supply in engine control units using discrete pass transistor topology. IC Role / Device Role / Timing Role: PNP pass element controlling output voltage via feedback loop; handles transient load steps up to 500 mA. Use Value: −150 V VCEO withstands load-dump spikes; AEC-Q101 qualification ensures long-term stability under thermal cycling. | Use Scenario: Driving 24 V industrial relay coils with microcontroller GPIO outputs. IC Role / Device Role / Timing Role: High-side switch enabling coil energization with logic-level base control. Use Value: Low VCE(sat) minimizes self-heating during continuous duty; SOT223 footprint simplifies PCB routing near relay terminals. |
| LED String Current Limiter | Flyback Converter Snubber |
Use Scenario: Constant-current source for high-brightness LED strings in commercial signage. IC Role / Device Role / Timing Role: Linear current regulator with emitter-degeneration resistor; dissipates excess voltage as heat. Use Value: 1 W power rating supports up to 20 V drop at 500 mA; hFE consistency ensures stable current across temperature. | Use Scenario: Clamp voltage spikes across transformer primary in offline flyback converters. IC Role / Device Role / Timing Role: Passive snubber transistor absorbing leakage energy during MOSFET turn-off. Use Value: −150 V rating safely absorbs 100 V+ transients; fast turn-on avoids secondary ringing due to low base charge requirement. |
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 |
|---|---|---|---|
| DZTA92 | Direct replacement; identical pinout, same VCEO, IC, and hFE; improved production continuity and extended lifecycle. | Same automotive and industrial use cases; no redesign needed for migration. | Select DZTA92 for new designs or BOM refresh to ensure long-term availability and support. |
| MJD2955T4G | Higher PD (1.5 W), lower VCEO (−70 V); TO-220 package with different thermal interface. | Requires PCB layout change; suitable only where lower voltage rating is acceptable and higher power dissipation is needed. | Consider only if thermal headroom exceeds 1 W and −70 V blocking suffices; not drop-in compatible. |
Compared with FZTA92, DZTA92 offers identical electrical and mechanical behavior with assured supply continuity, while MJD2955T4G trades voltage capability for higher power and larger package-making it viable only when board space and voltage margin allow.
Availability
FZTA92 is available at Aetrix Electronics and suitable for automotive voltage regulation, industrial relay driving, LED current limiting, and flyback snubbing requiring stable component supply despite end-of-life status.
Supply support for FZTA92 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 the Americas.
The FZTA92 belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for automotive and industrial power control applications demanding AEC-Q101 compliance and robust thermal performance in compact surface-mount packages.
FAQ
Is FZTA92 still in active production?
No, FZTA92 is officially obsolete and discontinued per Diodes' DS33194 Rev. 4 (February 2024). Diodes recommends migrating to DZTA92, which shares identical specifications and pinout while maintaining active production status and full technical support.
Can FZTA92 be used in new designs?
Diodes explicitly advises against using FZTA92 in new designs due to its obsolete status. New projects should adopt DZTA92 to avoid supply chain risk, ensure long-term availability, and benefit from ongoing quality assurance and documentation updates.
What is the thermal resistance RθJA of FZTA92 in SOT223?
The typical junction-to-ambient thermal resistance is 125°C/W under standard JEDEC test conditions (1-inch² copper pad, 1 oz Cu, no airflow). This value assumes proper soldering of the emitter tab to maximize heat transfer; actual performance depends on PCB layout and ambient conditions.
Does FZTA92 require a base resistor, and what value is recommended?
Yes, a base resistor is mandatory to limit base current and prevent damage. For IC = −500 mA with hFE(min) = 25, minimum IB = −20 mA is required. With VBB = −5 V and VBE ≈ −0.75 V, a 220 Ω resistor provides appropriate drive while allowing margin for variation in hFE and temperature.
FZTA92TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 25 @ 30mA, 10V
- Power - Max:
- 2 W
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZTA92TC FAQ
1.How can I place an order for FZTA92TC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZTA92TC 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 FZTA92TC reliable?
The price and inventory of FZTA92TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZTA92TC is usually 5 days.
3.What payment methods are accepted for FZTA92TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZTA92TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZTA92TC?
FZTA92TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZTA92TC 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 FZTA92TC?
For technical support, including FZTA92TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZTA92TC requirements.
6.How does Aetrix verify that FZTA92TC is sourced from the original manufacturer or authorized distributors?
All FZTA92TC 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 FZTA92TC meets industry standards.
7.What is the process for return or replacement of FZTA92TC?
All FZTA92TC units undergo pre-shipment inspection (PSI). If there is an issue with FZTA92TC, 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 FZTA92TC part is unused and in its original packaging.
Return procedure for FZTA92TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZTA92TC Tags
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