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Diodes Incorporated FZT953TA
- Part No.:
- FZT953TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
FZT953TA.pdf
- Description:
- TRANS PNP 100V 5A SOT-223-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,530
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Product details
Overview
FZT953TA from Diodes Incorporated is a PNP silicon planar high-current bipolar junction transistor in SOT-223 package, rated for −100 V VCEO, −5 A continuous collector current, and 3 W power dissipation at Tamb = 25°C; it delivers low VCE(sat) (−210 mV @ IC = −2 A, IB = −200 mA) and high hFE (min 75 @ IC = −5 A), used in industrial DC-DC converter output stages and high-side switching circuits.
For engineers reviewing the FZT953TA datasheet, FZT953TA pinout, FZT953TA application, or FZT953TA equivalent, key selection criteria include verified −100 V VCEO, −5 A IC capability, SOT-223 thermal performance with ≥4 in² PCB copper, and complementary pairing with FZT853 for push-pull topologies.
Technical Context
This PNP BJT operates in linear or saturated switching mode with base-driven control logic, supporting high-current load switching where low saturation voltage and stable gain up to 5 A are required. Its VCE(sat) remains ≤ −460 mV up to −5 A, and hFE maintains ≥75 at IC = −5 A, enabling predictable drive requirements in fixed-gain bias networks.
The device features a rugged SOA profile validated for single-pulse operation up to 100 A·V at Tamb = 25°C, with specified fT = 120 MHz and Cobo = 74 pF, confirming suitability for medium-frequency switching (≤500 kHz) in non-resonant converters and motor gate drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −100 V - supports high-side switching in 48 V and 60 V industrial bus systems without breakdown risk |
| IC (cont.) | −5 A - enables direct drive of solenoids, relays, and LED arrays without external current amplification |
| Ptot | 3 W at Tamb = 25°C - requires ≥4 in² PCB copper area for thermal management in continuous conduction mode |
| VCE(sat) | −210 mV @ IC = −2 A, IB = −200 mA - limits conduction loss to <1.2 W per device in high-current switch applications |
| hFE | 75 min @ IC = −5 A - ensures reliable base drive design with ≥10× safety margin on IB calculation |
| fT | 120 MHz - validates usable bandwidth for PWM edge rates up to ~500 kHz in hard-switched topologies |
| Tj range | −55°C to +150°C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
SOT-223 package with exposed emitter pad for enhanced thermal conduction; standard 3-pin configuration with tab-connected collector for heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current source terminal | Internally connected to large copper pad; primary thermal path and reference node for base bias network |
| 2 (Base) | Control input | Low-impedance gate for current-driven turn-on; requires ≥200 mA drive for full saturation at 5 A load |
| 3 (Collector) | Output current sink | Tab-connected to PCB ground plane or heatsink; carries full load current and dissipates majority of heat |
Key Features
| Feature | Design Value |
|---|---|
| High current capability | Rated −5 A continuous, −10 A peak - eliminates need for paralleling transistors in 24–48 V power rails |
| Low VCE(sat) | −210 mV @ −2 A - reduces conduction loss by >40% vs. standard PNP transistors in same package |
| Stable hFE at high current | ≥75 @ −5 A - enables single-stage base drive design without feedback compensation |
| Rugged SOA | Validated single-pulse safe operating area up to 100 A·V - withstands inductive kickback in relay/solenoid loads |
Applications
| Industrial DC-DC Converters | High-Side Load Switches |
|---|---|
Use Scenario: Step-down converter output stage in programmable logic controller (PLC) power supplies. IC Role / Device Role / Timing Role: PNP high-side switch controlling 24 V/3 A load with fixed 5 V base drive. Use Value: −210 mV VCE(sat) limits power loss to 0.63 W, enabling compact heatsink-free layout on 4-layer PCB. | Use Scenario: 48 V battery-powered motor control module enabling/disabling H-bridge supply rail. IC Role / Device Role / Timing Role: High-side enable switch with fast turn-off (toff = 350 ns) to prevent shoot-through during direction reversal. Use Value: Verified −100 V VCEO and 120 MHz fT ensure robust blocking and clean edge transitions at 200 kHz PWM. |
| Automotive Body Control | LED Driver Arrays |
Use Scenario: Central body controller driving heated mirror elements (12 V/4 A) in passenger vehicles. IC Role / Device Role / Timing Role: Temperature-stable PNP switch operating across −40°C to +125°C ambient with no gain degradation. Use Value: hFE ≥75 maintained at −5 A and +100°C enables consistent base resistor sizing across full temperature range. | Use Scenario: Constant-current LED string driver for commercial signage (36 V/2.5 A). IC Role / Device Role / Timing Role: Linear current regulator with emitter-follower configuration and precision sense resistor feedback. Use Value: Low VBE(sat) (−1080 mV @ −5 A) ensures tight current regulation accuracy within ±3% over load and temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP high-current switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZXTN25050DFH | −100 V VCEO, −5 A IC, but SOT-89 package (lower Ptot = 2.5 W); VCE(sat) = −300 mV @ −2 A | Limited to lower-duty-cycle or forced-air-cooled designs due to reduced thermal mass | Select when board space is constrained and peak power <2 W; avoid for continuous 5 A operation |
| MJD2955G | TO-220 package, −60 V VCEO, −10 A IC; higher VCE(sat) (−500 mV @ −5 A) and larger footprint | Requires mechanical heatsink; unsuitable for surface-mount-only assembly | Choose only when higher current rating justifies through-hole assembly and added thermal infrastructure |
Compared with ZXTN25050DFH and MJD2955G, FZT953TA uniquely balances SOT-223 mountability, −100 V rating, and −210 mV VCE(sat) at −2 A-making it optimal for thermally constrained, high-voltage industrial SMPS and load switches.
Availability
FZT953TA is available at Aetrix Electronics and suitable for industrial DC-DC converters, automotive body controllers, and high-side LED drivers requiring stable component supply and long-term manufacturability.
Supply support for FZT953TA 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 semiconductor company specializing in discrete, analog, and mixed-signal devices for industrial, computing, consumer, and automotive markets.
FZT953TA belongs to the FZT series of high-performance PNP transistors designed specifically for high-current, high-voltage switching in space-constrained industrial power systems.
FAQ
What is the maximum continuous collector current for FZT953TA?
The maximum continuous collector current is −5 A at Tamb = 25°C with ≥4 in² PCB copper area. Derating is required above 25°C ambient: −4.2 A at 50°C, −3.1 A at 75°C, and −1.8 A at 100°C, per the published thermal resistance curve and SOA diagram.
Is FZT953TA pin-compatible with FZT853?
Yes-FZT953TA and FZT853 share identical SOT-223 pinout (E-B-C), complementary polarity (PNP vs. NPN), and matched voltage/current ratings, enabling direct use in push-pull, totem-pole, and H-bridge output stages without layout changes.
Does FZT953TA require a heatsink in typical applications?
A dedicated heatsink is not required if PCB copper area ≥4 in² is used and power dissipation stays ≤2.2 W. At −5 A and −210 mV VCE(sat), conduction loss is 1.05 W-well within the 3 W Ptot limit at 25°C ambient with proper copper pour and via stitching.
What is the guaranteed minimum hFE at IC = −5 A?
The guaranteed minimum hFE is 75 at IC = −5 A, VCE = −1 V, and Tamb = 25°C, as specified in the "Static Forward Current Transfer Ratio" table. This value is tested and binned during production, ensuring predictable base drive requirements across all units.
FZT953TA 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):
- 5 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 460mV @ 500mA, 5A
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 2A, 1V
- Power - Max:
- 3 W
- Frequency - Transition:
- 120MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
FZT953TA FAQ
1.How can I place an order for FZT953TA through Aetrix?
Please submit a Request for Quotation (RFQ) for FZT953TA 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 FZT953TA reliable?
The price and inventory of FZT953TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT953TA is usually 5 days.
3.What payment methods are accepted for FZT953TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT953TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FZT953TA?
FZT953TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FZT953TA 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 FZT953TA?
For technical support, including FZT953TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT953TA requirements.
6.How does Aetrix verify that FZT953TA is sourced from the original manufacturer or authorized distributors?
All FZT953TA 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 FZT953TA meets industry standards.
7.What is the process for return or replacement of FZT953TA?
All FZT953TA units undergo pre-shipment inspection (PSI). If there is an issue with FZT953TA, 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 FZT953TA part is unused and in its original packaging.
Return procedure for FZT953TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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