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Diodes Incorporated FZT755TC
- Part No.:
- FZT755TC
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT755TC.pdf
- Description:
- TRANS PNP 150V 1A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,212
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Product details
Overview
FZT755TC from Diodes Incorporated is a 150V PNP high-voltage transistor in SOT223 package, rated for -1A continuous collector current and -150V collector-emitter breakdown voltage (BVCEO). It delivers -0.5V VCE(sat) at -500mA/-50mA drive and supports 3W power dissipation on 50mm × 50mm 2oz copper PCB - ideal for industrial DC-DC converter output stage switching and high-side load control.
For engineers reviewing the FZT755TC datasheet, FZT755TC pinout, FZT755TC application, or FZT755TC equivalent, key selection criteria include verified -150V blocking capability, thermal resistance of 41.7°C/W (RθJA), complementary pairing with FZT655, RoHS-compliant matte tin plating, and AEC-Q101 readiness for automotive-grade reliability validation.
Technical Context
This PNP bipolar junction transistor operates in linear or saturated switching mode with guaranteed BVCEO ≥ -150V and VBE(sat) ≤ -1.1V at -500mA/-50mA. Its hFE ranges from 20 to 300 across -10mA to -500mA collector currents, supporting stable current amplification in high-voltage bias networks.
The device features low-output capacitance (Cobo = 20pF at -10V), 30MHz fT, and ESD robustness (4kV HBM), enabling use in fast-switching flyback snubber circuits and high-impedance emitter-follower buffers where voltage headroom and transient immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -150V - Enables direct replacement of legacy -100V PNP transistors in 120VAC rectified bus applications without derating. |
| IC (cont.) | -1A - Supports sustained 12W load switching at 12V with <1.2W conduction loss (VCE(sat) × IC). |
| PD | 3W - Achievable only with 50mm × 50mm 2oz copper pad; requires thermal-aware PCB layout for full rating. |
| RθJA | 41.7°C/W - Junction-to-ambient thermal resistance under optimal mounting; dictates heatsink-free operation up to +85°C ambient. |
| hFE | 50–300 - Wide DC current gain range ensures reliable base drive design across production lots and temperature extremes (-55°C to +150°C). |
| fT | 30MHz - Supports >100kHz switching in soft-start and current-limit feedback paths without phase lag degradation. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-pin configuration with exposed collector tab (pin 3) for thermal and electrical connection. Molded green compound, UL 94V-0 rated, 0.112g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | E | Current source terminal; connects to positive rail in high-side switch configurations. |
| Pin 2 (Base) | B | Control input; requires ~50mA drive for full saturation at -500mA load. |
| Pin 3 (Collector) | C | Main current sink; electrically and thermally tied to exposed metal tab - must be connected to ground or low-impedance return path. |
| Pin 4 (Collector Tab) | C (redundant) | Same node as Pin 3; provides primary thermal conduction path to PCB copper area. |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage blocking | BVCEO ≥ -150V enables use in 100–120VAC-derived supplies without series stacking or voltage clamping. |
| Thermal performance | RθJL = 12.9°C/W to leads allows efficient heat transfer to PCB copper, reducing need for external heatsinks in space-constrained designs. |
| Automotive qualification ready | Manufactured in IATF 16949 facilities; PPAP-capable and AEC-Q101 testable - supports Tier-1 BOM inclusion with minimal requalification effort. |
| Green compliance | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb); meets EU RoHS 3 and JEDEC J-STD-020 Level 1 moisture sensitivity. |
Applications
| Industrial Power Supply Output Stage | Automotive LED Headlamp High-Side Driver |
|---|---|
Use Scenario: Regulated 24V/1A output stage in isolated DC-DC converters for factory automation controllers. IC Role / Device Role / Timing Role: PNP high-side switch controlling current flow into post-regulation filter capacitor and load. Use Value: -150V VCEO withstands reflected flyback spikes; -0.5V VCE(sat) limits conduction loss to <500mW at full load. |
Use Scenario: Constant-current driver for dual-beam LED arrays in Class 2 automotive lighting modules. IC Role / Device Role / Timing Role: Linear current regulator with PWM-modulated base drive for precise brightness control. Use Value: hFE stability over -40°C to +125°C ensures consistent LED current across vehicle operating range. |
| Programmable Logic Controller (PLC) Digital Output Module | High-Voltage Sensor Bias Network |
Use Scenario: 24VDC sinking/sourcing digital output channel with short-circuit protection and reverse-polarity tolerance. IC Role / Device Role / Timing Role: PNP switch interfacing microcontroller GPIO to field-side 24V loads via optocoupler-isolated base drive. Use Value: -2A ICM peak rating handles inductive kickback from solenoid valves without secondary clamping. |
Use Scenario: Precision bias generator for high-impedance piezoelectric or MEMS pressure sensors operating from 100V supply rails. IC Role / Device Role / Timing Role: Emitter-follower buffer providing low-output-impedance, high-voltage reference with minimal loading error. Use Value: Low Cobo (20pF) preserves sensor signal integrity above 100kHz; VBE(on) = -1.0V ensures predictable offset in analog front-end chains. |
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 |
|---|---|---|---|
| ON Semiconductor NSS12201LT1G | -100V VCEO, -1.5A IC, SOT-23 package, RθJA = 250°C/W | Limited to ≤100V systems; unsuitable for 120VAC-derived rails due to lower breakdown margin. | Select only when board space is constrained and voltage stress remains below 80V. |
| STMicroelectronics STN121203 | -120V VCEO, -1.2A IC, SOT-223, hFE = 40–200 | 10% lower blocking voltage reduces safety margin in surge-prone industrial environments. | Acceptable for cost-sensitive non-safety-critical 24–48V systems where full -150V rating is not required. |
Compared with NSS12201LT1G and STN121203, FZT755TC provides superior voltage headroom and thermal efficiency in SOT223, making it the preferred choice for 100–150V applications demanding long-term reliability and minimal derating.
Availability
FZT755TC is available at Aetrix Electronics and suitable for industrial power supplies, automotive lighting modules, PLC output stages, and high-voltage sensor bias networks requiring stable component supply and long-lifecycle support.
Supply support for FZT755TC 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.
FZT755TC belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for ruggedized industrial and automotive power control applications where voltage endurance, thermal resilience, and process consistency are mandatory.
FAQ
Is FZT755TC pin-compatible with FZT655?
No - FZT755TC is a PNP device while FZT655 is its complementary NPN counterpart. They share identical SOT223 mechanical footprint and pinout (E-B-C-tab), but polarity reversal means direct substitution is electrically invalid without circuit topology changes.
What is the maximum safe operating area (SOA) limit at 100°C case temperature?
At TC = 100°C, the SOA curve restricts operation to ≤ -0.6A at -100V or ≤ -1.0A at -30V in DC mode. Derating follows the published SOA graph on page 3 of DS33164 Rev. 7–2; pulse operation extends limits per duty cycle and pulse width.
Can FZT755TC be used in avalanche mode?
No - the datasheet does not specify or characterize avalanche energy rating (EAS). The device is designed for forward-active and saturated switching only; intentional avalanche operation may cause parametric shift or catastrophic failure.
Does FZT755TC require a base resistor when driven by a 3.3V microcontroller GPIO?
Yes - a series base resistor is mandatory. With VBE(sat) ≈ -1.1V and required IB = -50mA for -500mA IC, a 47Ω resistor limits GPIO current to ~47mA when pulled to 3.3V, staying within typical MCU pin ratings and ensuring reliable saturation.
FZT755TC 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):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 150 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 200mA, 1A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 50 @ 500mA, 5V
- Power - Max:
- 2 W
- Frequency - Transition:
- 30MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT755TC FAQ
1.How can I place an order for FZT755TC through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT755TC 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 FZT755TC reliable?
The price and inventory of FZT755TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT755TC is usually 5 days.
3.What payment methods are accepted for FZT755TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT755TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT755TC?
FZT755TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT755TC 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 FZT755TC?
For technical support, including FZT755TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT755TC requirements.
6.How does Aetrix verify that FZT755TC is sourced from the original manufacturer or authorized distributors?
All FZT755TC 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 FZT755TC meets industry standards.
7.What is the process for return or replacement of FZT755TC?
All FZT755TC units undergo pre-shipment inspection (PSI). If there is an issue with FZT755TC, 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 FZT755TC part is unused and in its original packaging.
Return procedure for FZT755TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT755TC Tags
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Diodes Incorporated
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Diodes Incorporated
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