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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated FZT953TC

Name: FZT953TC
Brand: Diodes Incorporated
SKU: FZT953TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FZT953TC

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-261-4, TO-261AA

Datasheet:: FZT953TC.pdf

Description:: TRANS PNP 100V 5A SOT-223-3

Quantity:: RFQ Add To RFQ list

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Inventory:9,156

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Product details

Overview

FZT953TC from Diodes Incorporated is a PNP silicon planar high-current bipolar junction transistor in SOT-223 package, rated for −100 V V_CEO, −5 A continuous collector current, and 3 W power dissipation at T_amb = 25°C; it delivers low V_CE(sat) (−210 mV @ I_C = −2 A, I_B = −200 mA) and high h_FE (min 75 @ I_C = −5 A), used in high-efficiency DC-DC converter output stages and industrial motor drive bias circuits.

For engineers reviewing the FZT953TC datasheet, FZT953TC pinout, FZT953TC application, or FZT953TC equivalent, key selection criteria include verified V_CEO/V_CBO ratings, saturation voltage behavior across temperature, h_FE linearity up to 5 A, and SOT-223 thermal performance under PCB copper area constraints.

Technical Context

This PNP transistor operates in linear and switching modes with guaranteed breakdown voltages of −140 V V_CBO and −100 V V_CEO, supporting high-voltage industrial control rails. Its h_FE remains ≥75 at I_C = −5 A (V_CE = −1 V), enabling stable current gain in high-current emitter-follower configurations.

V_CE(sat) is characterized down to −460 mV at I_C = −5 A / I_B = −500 mA, with typical values of −210 mV at I_C = −2 A, ensuring low conduction loss in high-side switch applications. Switching times (t_on = 82 ns, t_off = 350 ns) are specified under pulsed conditions (300 µs, 2% duty cycle) at V_CC = −10 V.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−100 V - Maximum safe collector-emitter voltage before avalanche in open-base configuration
I_C (cont.)	−5 A - Continuous DC collector current rating at T_amb = 25°C with 4 in² PCB copper
V_CE(sat)	−210 mV @ I_C = −2 A, I_B = −200 mA - Low on-state loss enabling <1.5 W dissipation in 2 A load switches
h_FE	75–200 @ I_C = −5 A to −10 mA - Wide usable gain range supports both switching and linear amplification
P_tot	3 W - Total device power dissipation limit under standard SOT-223 mounting conditions
f_T	120 MHz @ I_C = −100 mA - Transition frequency confirms suitability for medium-speed switching (≤1 MHz)

Pinout & Package

SOT-223 package with exposed emitter pad for thermal enhancement; standardized 4-pin outline (3 active + 1 thermal tab), JEDEC TO-261AA compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Main current return path	Connected to PCB thermal pad; primary heat sink interface; must be soldered to ≥4 in² copper
2 (Base)	Control input	Current-driven gate; requires −500 mA drive for full saturation at −5 A collector current
3 (Collector)	High-voltage current source	Handles −100 V reverse bias; connected to positive rail in high-side switch topology
Tab (Emitter)	Thermal & electrical common	Internally tied to Pin 1; provides mechanical stability and thermal conduction to PCB

Key Features

Feature	Design Value
High peak current capability	−10 A pulsed (ICM), enabling short-duration overload tolerance in motor start-up circuits
Low saturation voltage	V_CE(sat) ≤ −210 mV @ −2 A ensures <0.42 W conduction loss in 2 A loads
Wide operating temperature	−55°C to +150°C junction range supports under-hood automotive and industrial ambient extremes
Complementary pairing	Matched with FZT951 (NPN) for push-pull output stages without gain mismatch

Applications

Industrial DC-DC Converters

High-Voltage Linear Regulators

Use Scenario: Output stage in −48 V telecom DC-DC modules delivering up to 3 A continuous load.

IC Role / Device Role / Timing Role: PNP pass transistor regulating output voltage via base current control; no timing function.

Use Value: V_CE(sat) ≤ −210 mV minimizes dropout and thermal stress at full load, extending MTBF.

Use Scenario: Series pass element in −15 V/2 A lab-grade bench power supply.

IC Role / Device Role / Timing Role: High-current, high-V_CEO series regulator transistor; operates in linear mode.

Use Value: h_FE ≥75 at −5 A ensures stable loop gain and low output impedance across load range.

Motor Drive Bias Circuits

High-Side Switches in PLC I/O Modules

Use Scenario: Base drive amplifier for IGBT half-bridge in 24 V industrial servo drives.

IC Role / Device Role / Timing Role: Current amplifier supplying −500 mA base current to IGBT gates; no switching role.

Use Value: Guaranteed h_FE >100 at −1 A enables precise, temperature-stable gate drive current scaling.

Use Scenario: 24 V high-side switch controlling solenoid valves in programmable logic controller outputs.

IC Role / Device Role / Timing Role: SOT-223-packaged PNP switch turning on/off 1.5 A inductive loads.

Use Value: −100 V V_CEO withstands 2× supply voltage flyback transients without clamping diodes.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-current transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXTN25050DFH	−100 V V_CEO, −5 A I_C, but SOT-89 package (lower P_tot = 2.5 W); V_CE(sat) = −300 mV @ −2 A	Lower thermal capacity limits sustained 5 A operation; unsuitable for >1 s DC loads	Select only when board space restricts SOT-223 and average power <1.8 W
MJD2955T4G	TO-220 package, −70 V V_CEO, −10 A I_C; higher P_tot = 75 W but requires heatsink	Not drop-in: larger footprint, different mounting; better for >5 A continuous use	Choose when thermal budget exceeds 3 W and mechanical mounting allows TO-220

Compared with ZXTN25050DFH and MJD2955T4G, FZT953TC uniquely balances SOT-223 manufacturability, −100 V rating, and verified −210 mV V_CE(sat) at −2 A-making it optimal for compact, medium-power industrial switchers where thermal design targets 3 W with minimal copper.

Availability

FZT953TC is available at Aetrix Electronics and suitable for industrial DC-DC converters, high-voltage linear regulators, and PLC I/O modules requiring stable component supply with consistent SOT-223 thermal performance and −100 V breakdown margin.

Supply support for FZT953TC 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, and consumer markets.

FZT953TC belongs to the FZT high-performance bipolar transistor family, designed specifically for high-current, high-voltage switching and linear regulation in space-constrained industrial power systems.

FAQ

What is the maximum allowable PCB copper area for FZT953TC to achieve its full 3 W power rating?

The datasheet specifies "copper equal to 4 square inch minimum" for full 3 W dissipation at T_amb = 25°C. This refers to total copper area connected to the emitter tab (Pin 1 and thermal pad), not just local pad size. Reducing copper below 4 in² de-rates P_tot per the SOA curve-e.g., 1 in² limits continuous power to ~1.4 W at 25°C ambient.

Does FZT953TC support parallel operation for higher current handling?

Parallel operation is not recommended without external emitter resistors due to negative temperature coefficient of V_BE(sat), which causes current hogging. The datasheet does not specify matching tolerances between units. For >5 A, use a single higher-rated device like MJD2955T4G instead of paralleling FZT953TC units.

Is FZT953TC qualified for automotive applications per AEC-Q101?

No-FZT953TC is not AEC-Q101 qualified. It is rated for industrial temperature range (−55°C to +150°C), but lacks automotive-specific qualification testing (e.g., HTOL, ESD, mechanical shock). For automotive use, consider Diodes' AEC-Q101-qualified PZT953 or similar alternatives.

Can FZT953TC replace FZT951 in complementary pair designs?

No-FZT953TC and FZT951 are complementary types (PNP/NPN), not interchangeable. They share identical SOT-223 footprint and similar V_CEO/I_C ratings but opposite polarity. Swapping them would invert circuit functionality and likely cause immediate failure in push-pull or H-bridge topologies.

FZT953TC 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):: 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

FZT953TC FAQ

1.How can I place an order for FZT953TC through Aetrix?

Please submit a Request for Quotation (RFQ) for FZT953TC 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 FZT953TC reliable?

The price and inventory of FZT953TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FZT953TC is usually 5 days.

3.What payment methods are accepted for FZT953TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FZT953TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FZT953TC?

FZT953TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FZT953TC 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 FZT953TC?

For technical support, including FZT953TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FZT953TC requirements.

6.How does Aetrix verify that FZT953TC is sourced from the original manufacturer or authorized distributors?

All FZT953TC 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 FZT953TC meets industry standards.

7.What is the process for return or replacement of FZT953TC?

All FZT953TC units undergo pre-shipment inspection (PSI). If there is an issue with FZT953TC, 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 FZT953TC part is unused and in its original packaging.

Return procedure for FZT953TC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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