My Inquiry
My Account
Diodes Incorporated FZT795ATC
- Part No.:
- FZT795ATC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT795ATC.pdf
- Description:
- TRANS PNP 140V 0.5A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,353
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FZT795ATC from Diodes Incorporated is a 140V PNP medium-power high-gain bipolar junction 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 regulation circuits.
For engineers reviewing the FZT795ATC datasheet, FZT795ATC pinout, FZT795ATC application, or FZT795ATC equivalent, key selection criteria include breakdown voltage (-140V VCEO), thermal resistance (41.7°C/W on 50mm × 50mm copper), AEC-Q101 qualification, RoHS/Green compliance, and complementary pairing with FZT694B.
Technical Context
This PNP transistor operates in linear or saturated switching mode with guaranteed BVCEO and BVCBO ≥ -140V, enabling robust operation in high-voltage DC-DC feedback paths and reverse-polarity protection. Its low VCE(sat) and high hFE support efficient current amplification at moderate loads without external biasing complexity.
Thermal design relies on its dual-rated power dissipation: 2W on 25mm × 25mm 2oz FR4 and 3W on 50mm × 50mm 2oz FR4, with RθJL = 12.9°C/W confirming effective heat conduction through the collector lead-critical for sustained -500mA operation in compact industrial modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -140V - supports input rails up to -120V with 17% safety margin |
| IC (cont.) | -500mA - drives medium-power relays, LED strings, or MOSFET gates directly |
| hFE | 300–800 @ -10mA; ≥250 @ -200mA - ensures stable base drive across load range |
| VCE(sat) | -300mV @ -100mA/-1mA - minimizes conduction loss in series-pass or reverse-battery protection |
| RθJA | 41.7°C/W (50mm×50mm) - enables 3W dissipation without forced air in sealed enclosures |
| fT | 100MHz - sufficient for PWM frequencies up to ~10MHz with gain margin |
| ESD HBM | 4kV - meets IEC 61000-4-2 Level 3 for board-level handling robustness |
Pinout & Package
SOT223 package with exposed collector tab for thermal and electrical connection; molded green compound, UL 94V-0 rated, 0.112g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink reference node | Connected to system ground or negative rail; carries full load current |
| Base (B) | Control input | Receives current-limited drive (e.g., MCU GPIO via resistor); controls saturation |
| Collector (C) | Main output terminal | Mounted to PCB copper pour for heat transfer; connects to load high-side |
| Tab (Collector) | Thermal & electrical extension of Collector | Must be soldered to ≥25mm² copper area; electrically ties to Collector pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood use (−40°C to +125°C ambient, 150°C junction) |
| Halogen- and antimony-free "Green" | Meets <900ppm Br/Cl, <1000ppm Sb - compliant with EU ELV and JIG-170 |
| Low VCE(sat) at high IC | -250mV @ -500mA/-50mA - reduces power loss by >40% vs. standard PNP transistors |
| Complementary NPN pairing | FZT694B shares identical SOT223 footprint and thermal profile - simplifies dual-rail designs |
| Moisture sensitivity Level 1 | No bake required before reflow - compatible with standard SMT assembly lines |
Applications
| Battery Reverse-Polarity Protection | High-Voltage Linear Regulator Pass Element |
|---|---|
Use Scenario: Prevents damage when Li-ion or lead-acid battery is inserted backward in portable medical monitors or handheld test equipment. IC Role / Device Role / Timing Role: PNP high-side switch placed between battery terminal and system input; blocks reverse current flow. Use Value: Leverages -140V VCEO to withstand transient spikes during hot-swap; -300mV VCE(sat) limits voltage drop to <0.3V at 500mA. | Use Scenario: Used as pass transistor in -12V or -15V linear regulators powering analog sensor front-ends in industrial PLCs. IC Role / Device Role / Timing Role: Series pass element controlled by error amplifier; regulates output by varying VCE. Use Value: High hFE (>250 @ -200mA) reduces base drive burden; 3W dissipation capability supports 1W+ output power with passive heatsinking. |
| Automotive Load Switch (Non-Critical) | LED String Current Sink |
Use Scenario: Controls 12V cabin lighting or HVAC actuators in AEC-Q101-compliant body control modules. IC Role / Device Role / Timing Role: Low-side or high-side switch driven by CAN/LIN microcontroller GPIO. Use Value: PPAP-capable documentation and -55°C to +150°C TJ rating ensure supply chain traceability and extended temperature operation. | Use Scenario: Sinks current for 3–5 white LEDs in emergency exit signage or vehicle interior lighting. IC Role / Device Role / Timing Role: Constant-current sink configured with emitter resistor; provides stable brightness independent of VCC variation. Use Value: Tight hFE distribution (300–800) enables ±5% current matching across units; low VBE(sat) (-0.95V) preserves headroom for LED forward voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX951 | VCEO = -100V; hFE = 200–800; SOT89 package; no AEC-Q101 qualification | Lacks automotive qualification and 40V higher breakdown margin; smaller thermal pad | Select only for cost-sensitive non-automotive consumer designs where -100V rating suffices |
| MJD2955T4G | VCEO = -70V; IC = -10A; TO-220 package; higher power but lower voltage rating | Requires heatsink; unsuitable for >-70V rails; incompatible SMT footprint | Choose only when >1A current is needed and board space allows through-hole mounting |
Compared with ZTX951 and MJD2955T4G, FZT795ATC uniquely balances -140V ruggedness, SMT-compatible SOT223 thermal performance, and AEC-Q101 compliance-making it optimal for space-constrained, high-reliability 12–48V systems requiring single-source qualification.
Availability
FZT795ATC is available at Aetrix Electronics and suitable for battery management systems, automotive body electronics, industrial power supplies, and LED lighting requiring stable component supply across long production lifecycles.
Supply support for FZT795ATC 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, serving industrial, computing, communications, and consumer markets since 1964.
FZT795ATC belongs to Diodes' high-reliability bipolar transistor product line, engineered specifically for ruggedized power control in automotive and industrial environments where voltage margin, thermal stability, and qualification rigor are mandatory.
FAQ
What is the maximum safe operating junction temperature for FZT795ATC?
The absolute maximum junction temperature is +150°C per the datasheet. Continuous operation above +125°C requires derating based on ambient conditions and PCB copper area. At 25°C ambient with 50mm × 50mm 2oz copper, full 3W dissipation is allowed; above 75°C ambient, power must be reduced linearly to maintain TJ ≤ 150°C.
Is FZT795ATC pin-compatible with FZT795A?
Yes-FZT795ATC and FZT795A share identical SOT223 pinout, electrical specifications, and thermal characteristics. The "TC" suffix denotes tape-and-reel packaging (1,000 units/reel, 12mm tape width), while "A" indicates the base part number. Both are RoHS-compliant and AEC-Q101 qualified.
Can FZT795ATC replace a MOSFET in high-side switching applications?
It can function as a high-side PNP switch but lacks MOSFET advantages like zero gate current and lower RDS(on). Use FZT795ATC where simplicity, cost, or proven bipolar reliability outweigh efficiency needs-e.g., <500mA loads with <0.3V dropout tolerance. For >1A or <0.1V drop, a logic-level P-channel MOSFET is preferred.
Does FZT795ATC require a base resistor when driven by a 3.3V MCU GPIO?
Yes-a series base resistor is mandatory to limit IB and ensure saturation. For -500mA collector current and hFE ≥ 250, minimum IB = 2mA is required. With 3.3V GPIO and VBE(sat) ≈ -0.95V, a 1.0kΩ resistor delivers ~2.35mA, providing reliable saturation while staying within GPIO current limits.
FZT795ATC 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):
- 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
FZT795ATC FAQ
1.How can I place an order for FZT795ATC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT795ATC 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 FZT795ATC reliable?
The price and inventory of FZT795ATC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT795ATC is usually 5 days.
3.What payment methods are accepted for FZT795ATC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT795ATC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT795ATC?
FZT795ATC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT795ATC 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 FZT795ATC?
For technical support, including FZT795ATC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT795ATC requirements.
6.How does Aetrix verify that FZT795ATC is sourced from the original manufacturer or authorized distributors?
All FZT795ATC 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 FZT795ATC meets industry standards.
7.What is the process for return or replacement of FZT795ATC?
All FZT795ATC units undergo pre-shipment inspection (PSI). If there is an issue with FZT795ATC, 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 FZT795ATC part is unused and in its original packaging.
Return procedure for FZT795ATC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT795ATC Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
