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

Diodes Incorporated ZTP25040DFHQTA

Name: ZTP25040DFHQTA
Brand: Diodes Incorporated
SKU: ZTP25040DFHQTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZTP25040DFHQTA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: ZTP25040DFHQTA.pdf

Description:: TRANS PNP 40V 3A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:8,290

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Product details

Overview

ZTP25040DFHQTA from Diodes Incorporated is a 40V PNP bipolar junction transistor (BJT) in SOT23 package, designed for high-current switching in automotive-grade high-side drivers and gate driving circuits. It delivers -3A continuous collector current, -85mV V_CE(sat) at -1A/-100mA, and -40V V_CEO, with AEC-Q101 qualification and IATF16949 manufacturing compliance.

For engineers reviewing the ZTP25040DFHQTA datasheet, ZTP25040DFHQTA pinout, ZTP25040DFHQTA application, or ZTP25040DFHQTA equivalent, key selection criteria include saturation voltage under high base drive, thermal resistance in constrained PCB layouts, reverse blocking capability for bidirectional control, and automotive qualification status for safety-critical subsystems.

Technical Context

This PNP BJT operates as a low-saturation, high-current switch optimized for fast turn-on/turn-off in power control paths. Its -260mV max V_CE(sat) at -3A/-300mA and 270MHz f_T support efficient switching in DC-DC converters and motor drives up to 100kHz.

The device features -45V V_CBO, -3V V_ECO, and -7V V_EBO, enabling robust reverse-bias operation in half-bridge configurations. Its 69°C/W R_θJA (with 50mm×50mm 2oz copper) supports sustained -3A conduction without active cooling in space-constrained automotive modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-40V - Withstands 40V reverse collector-emitter voltage in high-side switch configurations
I_C (continuous)	-3A - Supports high-current load switching without derating at +25°C ambient
V_CE(sat)	< -85mV @ -1A/-100mA - Minimizes conduction loss in gate driver and motor control stages
h_FE	30–60 @ -3A/-2V - Ensures stable current gain under full-load saturation conditions
R_θJA	69°C/W - Enables thermal management on 50mm×50mm 2oz copper PCB without heatsink
f_T	270MHz - Supports fast switching transitions for PWM frequencies up to 100kHz
P_D	1.81W - Delivers usable power dissipation in SOT23 footprint for intermittent high-current pulses

Pinout & Package

SOT23 (Type DN) surface-mount package with matte tin-plated leads, UL 94V-0 molding compound, and 0.008g mass. Moisture sensitivity level 1 per J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal	Connected to positive rail in high-side switch; handles full load current return path
2 (Base)	Control input	Receives negative drive current to saturate transistor; requires -300mA for full -3A conduction
3 (Collector)	Switched output	Connects to load; reverse-blocking capability (-45V V_CBO) prevents shoot-through in bridge topologies

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive powertrain and chassis applications per stress test requirements
-85mV V_CE(sat) @ -1A	Reduces conduction loss by >40% vs. standard PNP transistors in gate-driving circuits
-40V V_CEO rating	Enables direct integration into 24V automotive systems with margin for load-dump transients
SOT23 footprint	Allows high-density placement in compact ECUs while maintaining 1.81W power handling
Halogen- and antimony-free	Meets automotive OEM environmental mandates (<900ppm Br/Cl, <1000ppm Sb)

Applications

MOSFET Gate Driving

DC-DC Converters

Use Scenario: Driving N-channel MOSFET gates in synchronous buck converters with bootstrap or isolated supply.

IC Role / Device Role / Timing Role: High-side PNP switch providing fast, low-loss pull-up for gate voltage during high-side conduction phase.

Use Value: -85mV V_CE(sat) minimizes gate drive loss; 270MHz f_T ensures sub-100ns turn-on for 500kHz+ switching.

Use Scenario: Regulating 12V/24V automotive rails using discrete high-side switch in non-synchronous topologies.

IC Role / Device Role / Timing Role: Primary power switch controlling inductor current flow during on-time in step-down conversion.

Use Value: -3A I_C and 1.81W P_D sustain 5A peak loads; -40V rating accommodates 36V load-dump events.

Motor Drives

High-Side Drivers

Use Scenario: Controlling brushed DC motors in HVAC actuators and seat positioners.

IC Role / Device Role / Timing Role: Low-loss current source for unidirectional motor winding energization.

Use Value: -260mV V_CE(sat) at -3A reduces heat generation in sealed motor modules; AEC-Q101 ensures reliability over 15-year vehicle life.

Use Scenario: Supplying regulated 5V/3.3V logic power to sensors and microcontrollers from battery rail.

IC Role / Device Role / Timing Role: Precision high-side pass element in linear regulator configuration.

Use Value: Tight h_FE tolerance (30–60 @ -3A) enables predictable current limiting; -3V V_ECO blocks reverse current during sleep mode.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP low-saturation transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMT3004LSDQ-7	PNP MOSFET (not BJT); R_DS(on) = 45mΩ vs. V_CE(sat) = 85mV; higher gate charge	Requires gate driver IC; unsuitable for simple base-driven circuits	Select when lower on-resistance justifies added complexity and cost
MMBT3906-7-F	Standard PNP BJT; V_CE(sat) = -300mV @ -100mA; I_C = -200mA only	Limited to signal-level switching; cannot replace ZTP25040DFHQTA in power stages	Select only for biasing or logic inversion where current < 200mA

Compared with DMT3004LSDQ-7 and MMBT3906-7-F, ZTP25040DFHQTA uniquely combines automotive qualification, -3A current capability, and sub-100mV saturation in a single SOT23 BJT-enabling drop-in replacement in legacy base-driven designs without gate driver redesign.

Availability

ZTP25040DFHQTA is available at Aetrix Electronics and suitable for automotive powertrain modules, industrial motor controllers, and high-reliability DC-DC converter designs requiring stable component supply across extended production lifecycles.

Supply support for ZTP25040DFHQTA 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, specializing in high-reliability components for automotive, industrial, and computing markets.

ZTP25040DFHQTA belongs to Diodes' AEC-Q101-qualified PNP transistor family, engineered specifically for high-current, low-saturation switching in automotive power management and actuation systems.

FAQ

What is the maximum allowable junction temperature for ZTP25040DFHQTA?

The device supports operation from -55°C to +150°C junction temperature. At 150°C, its V_CE(sat) increases to -220mV at -3A/-300mA, and h_FE drops to minimum 30. Derating curves in DS42950 Rev. 1-2 show 1.81W power dissipation is valid only up to 100°C ambient with 50mm×50mm 2oz copper.

Does ZTP25040DFHQTA require a base resistor in gate-driving applications?

Yes-a base resistor is required to limit IB to -100mA or -300mA depending on load current. For -1A switching, use R_B = (V_drive - V_BE(sat))/100mA; typical value is 10Ω with -5V drive. The -930mV V_BE(sat) at -3A confirms strong base drive necessity to avoid thermal runaway.

How does ZTP25040DFHQTA's thermal performance compare to standard SOT23 transistors?

ZTP25040DFHQTA achieves 69°C/W R_θJA with 50mm×50mm 2oz copper-30% better than typical SOT23 BJTs (≈100°C/W). This results from optimized die attach and leadframe design, allowing 1.81W dissipation versus ~0.5W for generic parts, critical for automotive under-hood environments.

Is ZTP25040DFHQTA compatible with lead-free reflow profiles?

Yes-the device uses matte tin-plated leads and green molding compound rated for JEDEC J-STD-020 Level 1 moisture sensitivity. It withstands peak reflow temperatures up to 260°C for 10 seconds, fully compliant with IPC/JEDEC J-STD-020D.1 and RoHS 3 (2015/863/EU).

ZTP25040DFHQTA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 3 A

Voltage - Collector Emitter Breakdown (Max):: 40 V

Vce Saturation (Max) @ Ib, Ic:: 260mV @ 20mA, 1V

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 10mA, 2V

Power - Max:: 730 mW

Frequency - Transition:: 270MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

ZTP25040DFHQTA FAQ

1.How can I place an order for ZTP25040DFHQTA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZTP25040DFHQTA 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 ZTP25040DFHQTA reliable?

The price and inventory of ZTP25040DFHQTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTP25040DFHQTA is usually 5 days.

3.What payment methods are accepted for ZTP25040DFHQTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTP25040DFHQTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZTP25040DFHQTA?

ZTP25040DFHQTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZTP25040DFHQTA 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 ZTP25040DFHQTA?

For technical support, including ZTP25040DFHQTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTP25040DFHQTA requirements.

6.How does Aetrix verify that ZTP25040DFHQTA is sourced from the original manufacturer or authorized distributors?

All ZTP25040DFHQTA 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 ZTP25040DFHQTA meets industry standards.

7.What is the process for return or replacement of ZTP25040DFHQTA?

All ZTP25040DFHQTA units undergo pre-shipment inspection (PSI). If there is an issue with ZTP25040DFHQTA, 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 ZTP25040DFHQTA part is unused and in its original packaging.

Return procedure for ZTP25040DFHQTA:

1.Submit a request within 90 days.

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

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