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Diodes Incorporated FZT795ATA
- Part No.:
- FZT795ATA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT795ATA.pdf
- Description:
- TRANS PNP 140V 0.5A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:24,592
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Product details
Overview
FZT795ATA 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 -100mA/-1mA drive-used in battery-powered load switching and voltage inversion circuits.
For engineers reviewing the FZT795ATA datasheet, FZT795ATA pinout, FZT795ATA application, or FZT795ATA equivalent, key selection criteria include breakdown voltage (BVCEO = -140V), thermal resistance (RθJA = 62.5°C/W on 25mm × 25mm PCB), gain linearity across -10mA to -500mA, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This PNP bipolar junction transistor operates in linear or saturated switching modes, with complementary NPN pairing to FZT694B enabling push-pull stage design. Its high BVCEO (-140V) and low VCE(sat) support robust operation in high-voltage DC-DC feedback paths and industrial power rail control.
The device features thermally optimized SOT223 packaging with RθJL = 12.9°C/W to collector lead, enabling stable performance up to +150°C junction temperature. ESD ratings (HBM: 4kV, MM: 400V) and halogen/antimony-free "Green" construction meet automotive and industrial environmental compliance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BVCEO | -140V - supports operation in 100V+ DC bus applications without breakdown risk |
| IC (continuous) | -500mA - enables direct drive of medium-current loads like relays or LED strings |
| hFE | 300–800 @ -10mA; ≥250 @ -200mA - ensures reliable base drive margin across operating range |
| VCE(sat) | -300mV @ -100mA/-1mA - minimizes conduction loss in high-efficiency switching nodes |
| RθJA | 62.5°C/W (25mm × 25mm PCB) - defines thermal derating slope for ambient-limited designs |
| fT | 100MHz - supports fast switching in PWM control loops up to ~10MHz practical frequency |
| ESD HBM | 4,000V - provides handling robustness during board assembly and field service |
Pinout & Package
SOT223 package with exposed collector tab for thermal conduction; molded green compound, UL 94V-0 rated, 0.112g weight, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current source terminal | Connected to higher potential rail; anchors bias network and sets VEB reference |
| Base (B) | Control input | Receives negative current to turn on; requires external current-limiting resistor |
| Collector (C) | Current sink terminal | Mounted to copper pour for thermal dissipation; electrically tied to output node |
| Tab / Heat Sink Pad | Thermal & electrical connection | Internally connected to collector; must be soldered to PCB ground or heatsink plane |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood environments including thermal cycling and vibration stress |
| Lead-free & Green | Meets RoHS 2 and halogen/antimony restrictions (<900ppm Br/Cl, <1000ppm Sb) |
| High BVCEO / BVCBO | Both rated -140V - allows use in flyback snubbers and high-side switch configurations |
| Low VBE(sat) | -0.95V @ -500mA/-50mA - reduces base drive power and improves efficiency in high-current saturation |
| PPAP capable | Supports full production part approval process for Tier 1 automotive suppliers |
Applications
| Battery Management Systems | Industrial Power Supplies |
|---|---|
Use Scenario: High-side current sensing and overvoltage cutoff in 48V Li-ion battery packs. IC Role / Device Role / Timing Role: PNP switch controlling gate of protection MOSFET in response to voltage monitor signal. Use Value: -140V rating prevents breakdown during load dump transients; low VCE(sat) avoids unnecessary heating during sustained cutoff. | Use Scenario: Voltage-level shifting and enable control in isolated DC-DC converter auxiliary rails. IC Role / Device Role / Timing Role: Level translator driving optocoupler input or secondary-side controller enable pin. Use Value: High hFE ensures clean logic-level translation with minimal base current draw; SOT223 thermal mass sustains duty-cycle stability. |
| Automotive Lighting Control | Telecom Power Sequencing |
Use Scenario: Dimmable headlamp current regulation using PWM-driven PNP emitter-follower stage. IC Role / Device Role / Timing Role: Linear pass element modulating LED string current in analog dimming loop. Use Value: Gain linearity across -10mA to -500mA enables precise current mirroring; fT = 100MHz supports PWM edge fidelity up to 10kHz. | Use Scenario: Controlled power-up sequencing of FPGA I/O banks and core voltage rails. IC Role / Device Role / Timing Role: Delayed-enable switch activating downstream LDOs based on upstream supply readiness. Use Value: -7V VEB0 withstands reverse-bias during rail ramp-up; thermal derating curve supports 100% duty cycle at 70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP high-voltage switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25050DFHTA | 50V VCEO, SOT23 package, lower power (0.5W), hFE = 200 min @ -500mA | Not suitable for >60V systems; limited thermal mass for continuous conduction | Select only for space-constrained low-voltage logic-level switching where 140V rating is unnecessary |
| MJD2955T4G | TO-220 package, -70V VCEO, 10A IC, higher thermal mass but larger footprint | Over-specified current capability; incompatible pinout and mounting for SOT223-referenced layouts | Choose when >1A pulsed current or forced-air cooling is required, and board area permits TO-220 |
Compared with ZXTN25050DFHTA and MJD2955T4G, FZT795ATA uniquely balances 140V breakdown, SOT223 thermal performance, and automotive qualification-making it optimal for compact, high-reliability 48–100V industrial and automotive switching nodes where both voltage headroom and PCB real estate matter.
Availability
FZT795ATA is available at Aetrix Electronics and suitable for battery management systems, automotive lighting control, industrial power supplies, and telecom power sequencing requiring stable component supply and AEC-Q101-compliant sourcing.
Supply support for FZT795ATA 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.
FZT795ATA belongs to Diodes' high-reliability bipolar transistor product line, engineered specifically for automotive and industrial applications demanding extended voltage range, thermal resilience, and rigorous qualification to AEC-Q101 standards.
FAQ
What is the maximum safe operating temperature for FZT795ATA?
The FZT795ATA has an operating junction temperature range of -55°C to +150°C. Under continuous DC conditions on a 25mm × 25mm 2oz copper PCB, its maximum ambient temperature before reaching 150°C junction is approximately 87.5°C (calculated from RθJA = 62.5°C/W and PD = 2W). Derating is required above 25°C ambient per the published curve.
Is FZT795ATA pin-compatible with its complementary NPN FZT694B?
No-FZT795ATA (PNP) and FZT694B (NPN) share the same SOT223 package outline but have reversed pin assignments: FZT795ATA uses E-B-C (Emitter-Base-Collector) pin order, while FZT694B uses C-B-E. Layouts must account for this polarity reversal to avoid functional failure.
Does FZT795ATA require a base resistor, and what value is recommended?
Yes-a series base resistor is mandatory to limit IB and prevent thermal runaway. For -500mA collector current with hFE ≥ 250, minimum IB = -2mA is needed. With VBE(on) ≈ -0.75V and typical drive voltage of -5V, a 2.1kΩ resistor provides ~2mA drive while allowing margin for hFE variation and temperature drift.
Can FZT795ATA be used in linear amplifier configurations?
Yes-it is characterized for linear operation with specified hFE across -10mA to -500mA and VCE = -2V. However, its fT = 100MHz and moderate output capacitance (Cobo = 15pF) limit usable bandwidth to ~1–5MHz in common-emitter amplifiers; thermal limits constrain continuous dissipation to 2W on standard PCBs.
FZT795ATA 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:
- 250mV @ 50mA, 500mA
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT795ATA FAQ
1.How can I place an order for FZT795ATA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT795ATA 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 FZT795ATA reliable?
The price and inventory of FZT795ATA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT795ATA is usually 5 days.
3.What payment methods are accepted for FZT795ATA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT795ATA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT795ATA?
FZT795ATA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT795ATA 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 FZT795ATA?
For technical support, including FZT795ATA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT795ATA requirements.
6.How does Aetrix verify that FZT795ATA is sourced from the original manufacturer or authorized distributors?
All FZT795ATA 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 FZT795ATA meets industry standards.
7.What is the process for return or replacement of FZT795ATA?
All FZT795ATA units undergo pre-shipment inspection (PSI). If there is an issue with FZT795ATA, 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 FZT795ATA part is unused and in its original packaging.
Return procedure for FZT795ATA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT795ATA Tags
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