My Inquiry
My Account
Diodes Incorporated FZT956QTA
- Part No.:
- FZT956QTA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT956QTA.pdf
- Description:
- TRANS PNP 200V 2A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,783
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FZT956QTA from Diodes Incorporated is a 200V PNP high-voltage transistor in SOT223 package, designed for high-voltage switching and linear regulation in industrial power supplies and motor control circuits. It delivers -2A continuous collector current, -200V VCEO, and low saturation voltage of -165mV @ -1A, enabling efficient operation in high-side switch configurations.
For engineers reviewing the FZT956QTA datasheet, FZT956QTA pinout, FZT956QTA application, or FZT956QTA equivalent, key selection criteria include high-voltage blocking capability, gain stability up to -5A, thermal performance on 52mm×52mm 2oz copper, and automotive-qualified variants (FZT956Q) for mission-critical systems.
Technical Context
This PNP bipolar junction transistor operates with emitter-grounded configuration and supports high-voltage DC link switching in offline SMPS, flyback controllers, and relay drivers. Its BVCEO = -200V and IC = -2A rating allow direct replacement of legacy TO-220 devices in space-constrained designs.
The device exhibits hFE ≥ 100 at -2A and fT = 110MHz, supporting fast switching with ton = 67ns and toff = 1140ns under -50V VCC. Thermal resistance RθJA = 42°C/W (52mm×52mm 2oz Cu) enables stable operation up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -200V - Enables use in 170VAC rectified bus applications without derating. |
| IC (cont.) | -2A - Supports sustained load switching in industrial solenoid and lamp drivers. |
| VCE(sat) | < -165mV @ -1A - Minimizes conduction loss in high-current linear regulators. |
| hFE | 100–200 @ -2A - Ensures reliable base drive margin across production lots. |
| fT | 110MHz - Permits use in kHz-range PWM circuits with minimal phase lag. |
| RθJA | 42°C/W - Requires only modest PCB copper area for thermal management. |
| ESD HBM | 4kV - Provides robust handling during automated assembly and field service. |
Pinout & Package
Package: SOT223 (Type DN), surface-mount, 4-pin outline with exposed collector tab for thermal dissipation. Molded green compound, UL 94V-0 rated, 0.112g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Emitter) | Current source terminal | Connected to positive rail in high-side switch; requires low-impedance return path. |
| Pin 2 (Base) | Control input | Driven by logic-level or resistor-limited current; VBE(on) = -810mV @ -2A. |
| Pin 3 (Collector) | Current sink terminal | Exposed metal tab - must be soldered to large copper pour for thermal conduction. |
| Pin 4 (Collector tab) | Thermal & electrical connection | Electrically identical to Pin 3; primary heat path to PCB; not isolated. |
Key Features
| Feature | Design Value |
|---|---|
| High voltage blocking | BVCEO = -200V ensures compatibility with 230VAC mains-derived rails. |
| Gain stability at high current | hFE ≥ 50 @ -2A enables predictable base drive sizing in power stages. |
| Low saturation loss | VCE(sat) ≤ -168mV @ -2A reduces power dissipation in linear mode operation. |
| Automotive-grade variant available | FZT956Q meets AEC-Q101 requirements for under-hood and EV charging modules. |
| Green manufacturing | Halogen- and antimony-free, RoHS 3 compliant, <900ppm Br/Cl, <1000ppm Sb. |
Applications
| Industrial Power Supply | Motor Control Driver |
|---|---|
Use Scenario: High-side switch in 120–277VAC offline flyback auxiliary supply. IC Role / Device Role / Timing Role: PNP pass transistor regulating +12V bias rail for PWM controller IC. Use Value: -200V VCEO eliminates need for series-connected transistors; -165mV VCE(sat) cuts standby losses by >30% vs. older SOT223 PNP parts. |
Use Scenario: Directional current control in brushed DC motor H-bridge half-leg. IC Role / Device Role / Timing Role: High-side PNP switch enabling bidirectional motor drive with single-supply logic. Use Value: Fast ton/toff (67ns/1140ns) supports 20kHz PWM without shoot-through risk; hFE hold-up at -5A peak sustains torque during stall conditions. |
| Relay & Solenoid Driver | LED Constant-Current Regulator |
Use Scenario: Inductive load driver in programmable logic controller (PLC) output module. IC Role / Device Role / Timing Role: Snubberless high-voltage switch driving 24V/1A solenoids with integrated flyback energy handling. Use Value: -220V BVCBO withstands >1kV inductive kickback; RθJL = 8.8°C/W allows rapid heat transfer to PCB ground plane. |
Use Scenario: Linear current regulator for high-brightness LED strings in architectural lighting. IC Role / Device Role / Timing Role: Precision current source with external sense resistor, operating in active region. Use Value: Tight hFE distribution (100–200) enables ±3% current accuracy without trimming; -150°C max TJ rating supports sealed fixture operation. |
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 |
|---|---|---|---|
| ZXTN25050DFH | Lower VCEO (-100V), higher hFE (200–400), SOT223 package | Not suitable for >120VDC bus; better for low-voltage logic-level switching | Select when system voltage ≤ 80V and gain consistency is critical. |
| MJD2955T4G | TO-220 package, -70V VCEO, -10A IC, higher RθJA (65°C/W) | Requires heatsink; incompatible with SMT-only layouts | Choose only if mechanical mounting constraints permit through-hole assembly and higher voltage is not required. |
Compared with ZXTN25050DFH and MJD2955T4G, FZT956QTA uniquely balances 200V blocking, SMT compatibility, and thermal efficiency-making it optimal for compact, high-reliability industrial power stages where voltage margin and board space are both constrained.
Availability
FZT956QTA is available at Aetrix Electronics and suitable for industrial power supplies, motor control drivers, and relay/solenoid interface modules requiring stable component supply and long-term manufacturability.
Supply support for FZT956QTA 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 and manufacturing operations across Asia and the Americas.
FZT956QTA belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for industrial and automotive power interface applications demanding ruggedness, thermal reliability, and consistent parametric performance across temperature and current extremes.
FAQ
What is the maximum safe operating voltage for FZT956QTA in continuous DC applications?
The absolute maximum VCEO is -200V, but for reliable long-term operation, Diodes recommends limiting VCE to ≤ -160V under continuous DC conditions. This 20% derating accounts for voltage transients, temperature effects on breakdown, and safety margins required in industrial environments per IEC 61000-4-5.
Can FZT956QTA be used in avalanche mode for snubberless inductive switching?
No-FZT956QTA is not rated or characterized for repetitive avalanche operation. Its SOA curve shows no defined second breakdown region beyond DC limits, and the datasheet does not specify EAS or IAR. External clamping (e.g., TVS diode or RC snubber) is required for inductive loads.
Is the SOT223 pinout compatible with standard SOT223 footprint libraries?
Yes-the FZT956QTA uses the standard SOT223 (Type DN) mechanical outline with pin 1 = emitter, pin 2 = base, pin 3 = collector, and pin 4 = collector tab. The recommended pad layout (C1 = 6.40mm, Y2 = 8.00mm) matches IPC-7351B generic SOT223 land patterns.
How does the automotive-grade FZT956Q differ electrically from FZT956QTA?
FZT956Q shares identical electrical specifications and SOT223 package but adds AEC-Q101 qualification, extended temperature screening (-40°C to +150°C), and enhanced lot traceability. No parameter differences exist-only process controls and test coverage are tightened for automotive use.
FZT956QTA 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):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 200 V
- Vce Saturation (Max) @ Ib, Ic:
- 275mV @ 400mA, 2A
- Current - Collector Cutoff (Max):
- 50nA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1A, 5V
- Power - Max:
- 1.6 W
- Frequency - Transition:
- 110MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT956QTA FAQ
1.How can I place an order for FZT956QTA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT956QTA 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 FZT956QTA reliable?
The price and inventory of FZT956QTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT956QTA is usually 5 days.
3.What payment methods are accepted for FZT956QTA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT956QTA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT956QTA?
FZT956QTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT956QTA 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 FZT956QTA?
For technical support, including FZT956QTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT956QTA requirements.
6.How does Aetrix verify that FZT956QTA is sourced from the original manufacturer or authorized distributors?
All FZT956QTA 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 FZT956QTA meets industry standards.
7.What is the process for return or replacement of FZT956QTA?
All FZT956QTA units undergo pre-shipment inspection (PSI). If there is an issue with FZT956QTA, 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 FZT956QTA part is unused and in its original packaging.
Return procedure for FZT956QTA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FZT956QTA 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…
