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Diodes Incorporated FZT795AQTA
- Part No.:
- FZT795AQTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT795AQTA.pdf
- Description:
- TRANS PNP 140V 0.5A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,012
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Product details
Overview
FZT795AQTA from Diodes Incorporated is a 140V PNP medium-power high-gain transistor in SOT223 package, rated for -500mA continuous collector current, with hFE > 250 at -0.2A and VCE(sat) ≤ -300mV at -500mA/-50mA drive. It serves as a robust switching or linear amplification device in automotive battery management and industrial power control circuits.
For engineers reviewing the FZT795AQTA datasheet, FZT795AQTA pinout, FZT795AQTA application, or FZT795AQTA equivalent, key selection criteria include its AEC-Q101 qualification, -140V VCEO rating, low saturation voltage under high current, thermal resistance of 41.7°C/W on 50mm × 50mm copper, and complementary pairing with FZT694B.
Technical Context
This PNP bipolar junction transistor operates with a maximum collector-emitter voltage of -140V and supports continuous collector current up to -500mA. Its high DC current gain (hFE ≥ 300 at -10mA, ≥ 250 at -200mA) enables efficient base-drive reduction in switching applications.
Thermal performance is defined by RθJA = 41.7°C/W on 50mm × 50mm 2oz FR4 PCB and RθJL = 12.9°C/W to leads, supporting stable operation up to +150°C junction temperature. ESD ratings meet JEDEC Class 3A HBM (4kV) and MM (400V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -140 V - Withstands 140V reverse bias across collector-emitter without breakdown, enabling use in high-voltage battery disconnects. |
| IC (continuous) | -500 mA - Supports sustained load switching up to 0.5A, suitable for motor drivers and power rail controls. |
| hFE | ≥250 @ -200mA - Delivers high current gain at mid-range load, reducing required base drive current and driver stage complexity. |
| VCE(sat) | ≤ -300 mV @ -500mA/-50mA - Minimizes conduction loss and self-heating during saturation, critical for thermally constrained automotive modules. |
| RθJA | 41.7 °C/W - Enables 3W power dissipation on large copper pads, supporting higher duty-cycle operation than standard SOT223 parts. |
| AEC-Q101 | Qualified - Meets stress-test requirements for automotive electronics, including temperature cycling, HTRB, and ESD, ensuring reliability in under-hood environments. |
Pinout & Package
SOT223 surface-mount package with three terminals: emitter (E), base (B), and collector (C); collector tab is internally connected to lead 1 and serves as primary heat path to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (Tab) | Collector | Electrically and thermally connected to internal collector die; must be soldered to ≥25 mm² copper for rated 3W dissipation. |
| Lead 2 | Base | Control input terminal; requires ~50mA drive for full saturation at 500mA load, compatible with standard logic-level drivers. |
| Lead 3 | Emitter | Current return path; tied to system ground or negative rail in high-side switch configurations. |
Key Features
| Feature | Design Value |
|---|---|
| High breakdown voltage | VCBO/VCEO = -140V ensures safe operation in 48V and 60V battery systems with transient margin. |
| Low saturation voltage | VCE(sat) ≤ -300mV at full rated current reduces power loss and improves efficiency in PWM-driven loads. |
| AEC-Q101 qualification | Validated for automotive under-hood use, including temperature cycling (-55°C to +150°C) and humidity testing. |
| Green, RoHS-compliant construction | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets global environmental compliance mandates. |
Applications
| Battery Disconnect Switch | Automotive HVAC Blower Control |
|---|---|
Use Scenario: High-side switching of 48V battery feed to downstream ECUs during ignition-off sleep mode. IC Role / Device Role / Timing Role: PNP transistor configured as high-side switch, controlled via microcontroller GPIO through base resistor network. Use Value: -140V VCEO withstands load-dump transients; low VCE(sat) limits standby power loss to <150mW at 500mA. | Use Scenario: PWM-controlled speed regulation of brushed DC blower motor in climate control module. IC Role / Device Role / Timing Role: Linear or switched-mode current sink in emitter-follower configuration, driven by MCU PWM output. Use Value: hFE ≥ 250 allows direct MCU drive without additional buffer stage; AEC-Q101 rating ensures 15-year field reliability. |
| Industrial Power Sequencing | LED Driver for Commercial Lighting |
Use Scenario: Controlled ramp-up of 24V auxiliary rails in programmable logic controllers during cold start. IC Role / Device Role / Timing Role: Current-limited pass element in active sequencing circuit, biased for soft-start behavior. Use Value: RθJL = 12.9°C/W enables precise thermal coupling to heatsink; -7V VEBO prevents base-emitter overvoltage during sequencing glitches. | Use Scenario: Constant-current sink for high-brightness LED strings in streetlight drivers operating from 36–72V input. IC Role / Device Role / Timing Role: Linear current regulator in series with LED string, modulated via analog dimming signal. Use Value: 3W power capability on 50mm × 50mm copper supports 500mA LED current with <2°C rise; green compound satisfies IEC 62474 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP high-voltage switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN2012ZTA | Lower VCEO (-100V), higher hFE (min 400), SOT89 package | Not AEC-Q101 qualified; unsuitable for automotive safety-critical functions | Select when cost-sensitive industrial designs require higher gain but tolerate reduced voltage margin and no automotive qualification. |
| FZT788BQTA | Same SOT223 package, -120V VCEO, -1A IC, lower hFE (min 100) | Higher current rating but reduced voltage headroom; used in non-transient-prone 24V systems | Choose where peak load current exceeds 500mA and 120V rating suffices-e.g., commercial power supplies with clamped inputs. |
Compared with ZXTN2012ZTA and FZT788BQTA, FZT795AQTA uniquely balances -140V breakdown, AEC-Q101 compliance, and 500mA capability in SOT223-making it optimal for automotive battery-switching and industrial 48V systems requiring both voltage margin and qualification assurance.
Availability
FZT795AQTA is available at Aetrix Electronics and suitable for automotive battery management, industrial power sequencing, and commercial LED driver designs requiring stable component supply and long-term lifecycle support.
Supply support for FZT795AQTA 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 FZT795AQTA belongs to Diodes' high-reliability bipolar transistor product line, engineered specifically for automotive and industrial power control applications demanding extended voltage range, thermal robustness, and AEC-Q101 validation.
FAQ
What is the difference between FZT795AQTA and FZT795ATA?
FZT795AQTA is the automotive-grade variant qualified to AEC-Q101 and PPAP-capable, while FZT795ATA is the industrial version with identical electrical and thermal specs but no automotive qualification documentation. Both share the same SOT223 package, marking, and absolute maximum ratings-including -140V VCEO and -500mA IC.
Can FZT795AQTA replace FZT788BQTA in a 48V system?
FZT795AQTA can replace FZT788BQTA only if the application requires ≥140V breakdown margin-e.g., in systems exposed to ISO 7637-2 Load Dump transients. While FZT788BQTA supports higher current (-1A), its -120V VCEO may risk failure under 140V transients common in 48V automotive architectures.
Is the collector tab electrically isolated in FZT795AQTA?
No-the collector tab (Lead 1) is directly connected to the internal collector semiconductor region and is not insulated. It must be electrically tied to the collector node in the circuit and thermally bonded to PCB copper for proper heat dissipation; isolation requires external insulation or mounting hardware.
What is the recommended PCB pad layout for thermal performance?
Diodes recommends a minimum 25 mm² copper area connected to Lead 1 (collector tab) using multiple thermal vias to inner ground/power planes. The AP02001 footprint specifies 6.40 mm × 2.30 mm pad dimensions with 1.20 mm soldermask opening-ensuring mechanical stability and optimal RθJA = 41.7°C/W on 50mm × 50mm 2oz FR4.
FZT795AQTA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 140 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 5mA, 200mA
- Current - Collector Cutoff (Max):
- 100nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 10mA, 2V
- Power - Max:
- 2 W
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT795AQTA FAQ
1.How can I place an order for FZT795AQTA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT795AQTA 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 FZT795AQTA reliable?
The price and inventory of FZT795AQTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT795AQTA is usually 5 days.
3.What payment methods are accepted for FZT795AQTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT795AQTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT795AQTA?
FZT795AQTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT795AQTA 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 FZT795AQTA?
For technical support, including FZT795AQTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT795AQTA requirements.
6.How does Aetrix verify that FZT795AQTA is sourced from the original manufacturer or authorized distributors?
All FZT795AQTA 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 FZT795AQTA meets industry standards.
7.What is the process for return or replacement of FZT795AQTA?
All FZT795AQTA units undergo pre-shipment inspection (PSI). If there is an issue with FZT795AQTA, 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 FZT795AQTA part is unused and in its original packaging.
Return procedure for FZT795AQTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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