Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Diodes Incorporated ZXT951KQTC

Name: ZXT951KQTC
Brand: Diodes Incorporated
SKU: ZXT951KQTC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ZXT951KQTC

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: ZXT951KQTC.pdf

Description:: TRANS PNP 60V 6A TO252

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,343

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ZXT951KQTC from Diodes Incorporated is a 60V PNP bipolar junction transistor (BJT) engineered for automotive-grade medium-power switching, with -6A continuous collector current, -60V V_CEO, and typical saturation voltage of -115mV at -2A/-200mA drive-used in DC-DC converters, motor control, and inverter circuits.

For engineers reviewing the ZXT951KQTC datasheet, ZXT951KQTC pinout, ZXT951KQTC application, or ZXT951KQTC equivalent, key selection criteria include AEC-Q101 qualification, TO252 (DPAK) thermal performance, low R_SAT (53mΩ), high h_FE stability (100 min @ -2A), and RoHS-compliant "Green" packaging.

Technical Context

This PNP BJT operates as a high-reliability power switch in automotive systems, featuring robust breakdown ratings (BVCBO = -100V, BVCEO = -60V) and pulsed peak current capability up to -15A. Its gain remains stable across temperature (-55°C to +150°C) and load (h_FE ≥100 at -2A, ≥40 at -6A).

The device uses a TO252 (DPAK) package with exposed collector tab for low thermal resistance (R_θJL = 1.77°C/W), enabling efficient heat transfer to PCB copper. Saturation behavior is optimized for low-loss switching: V_CE(SAT) = -115mV typ. at IC = -2A/IB = -200mA, with f_T = 120MHz for moderate-frequency control.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-60V - Withstands 60V reverse collector-emitter voltage before breakdown, suitable for 48V automotive bus switching.
I_C (cont.)	-6A - Supports sustained 6A load current in motor drivers or DC-DC primary-side switches without derating at T_A ≤ 25°C.
V_CE(SAT)	-115mV typ. @ -2A/-200mA - Delivers low conduction loss (≤230mW at 2A), reducing thermal stress in high-duty-cycle applications.
h_FE	100 min @ -2A - Ensures reliable base drive margin and stable switching timing in feedback-controlled power stages.
R_θJL	1.77°C/W - Enables direct thermal coupling to PCB copper pour, supporting >3W dissipation with minimal junction-to-lead temperature rise.
AEC-Q101	Qualified - Meets automotive reliability standards for temperature cycling, HBM ESD (8kV), and mechanical shock, required for under-hood deployment.

Pinout & Package

Package: TO252 (DPAK), surface-mount, with exposed collector tab on lead 2 for thermal and electrical connection.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal	Connected to higher potential rail; carries full load current and defines reference for base drive.
2 (Collector)	Current sink terminal	Exposed metal tab - electrically and thermally connected to PCB ground/copper pour for low-inductance, high-current return path.
3 (Base)	Control input	Receives negative current to turn on; requires -200mA drive for full saturation at -2A load.

Key Features

Feature	Design Value
Low saturation voltage	V_CE(SAT) = -115mV typ. at -2A ensures <230mW conduction loss, minimizing heatsink requirements in space-constrained modules.
High current capability	-6A continuous / -15A pulsed supports high-torque motor phases and transient-heavy DC-DC primary switches without current limiting.
Automotive qualification	AEC-Q101 qualified and PPAP-capable - meets production release requirements for Tier 1 automotive suppliers.
Green packaging	Halogen- and antimony-free, RoHS-compliant molding compound (<900ppm Br/Cl, <1000ppm Sb) satisfies EU ELV and OEM environmental mandates.

Applications

DC-DC Converters

Motor Control

Use Scenario: Step-down (buck) converter in 12V/48V automotive subsystems powering infotainment or ADAS sensors.

IC Role / Device Role / Timing Role: PNP high-side switch controlling energy transfer into output inductor during active phase.

Use Value: Low V_CE(SAT) reduces conversion losses by ~0.5% efficiency point vs. standard PNP alternatives at 2A load.

Use Scenario: H-bridge leg driver for 12V brushed DC motors in HVAC actuators or seat adjusters.

IC Role / Device Role / Timing Role: Medium-power PNP switch handling bidirectional current reversal with fast t_ON/t_OFF (82ns/350ns).

Use Value: Stable h_FE across -40°C to +125°C ensures consistent gate drive strength and PWM fidelity over full vehicle operating range.

Inverter Circuits

Automotive Power Switches

Use Scenario: Half-bridge inverter stage for 48V mild-hybrid starter-generator interface.

IC Role / Device Role / Timing Role: High-voltage PNP switch rated for -60V V_CEO, managing regenerative braking current flow.

Use Value: BVCBO = -100V provides 40V design margin above 48V nominal bus, preventing avalanche failure during load dump transients.

Use Scenario: Central body controller power distribution for lighting, pumps, and solenoids.

IC Role / Device Role / Timing Role: AEC-Q101-qualified discrete switch replacing electromechanical relays for improved lifetime and EMI performance.

Use Value: 8kV HBM ESD rating enables robust operation in noisy chassis environments without external protection diodes.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBT6517LT1G	Lower V_CEO (-40V), lower I_C (-0.5A), SOT-23 package	Not suitable for 48V bus or motor loads; limited to low-power signal switching	Select only for sub-24V logic-level control where thermal mass and current are negligible.
PN2907A	TO-92 package, -60V V_CEO, but only -0.6A I_C and no AEC-Q101 qualification	Lacks automotive reliability certification and thermal capability for sustained >1A loads	Acceptable for non-automotive prototypes or low-volume industrial controls without PPAP or thermal constraints.

Compared with MMBT6517LT1G and PN2907A, ZXT951KQTC delivers 10× higher continuous current, TO252 thermal performance, and AEC-Q101 compliance-making it the sole viable option for production automotive power switching above 1A.

Availability

ZXT951KQTC is available at Aetrix Electronics and suitable for DC-DC converters, motor control modules, and automotive power switches requiring stable component supply across extended temperature ranges and high-reliability production cycles.

Supply support for ZXT951KQTC 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, application-optimized components for automotive, industrial, and computing markets.

The ZXT951KQTC belongs to Diodes' AEC-Q101-qualified medium-power BJT family, designed specifically for automotive power switching where low saturation loss, thermal robustness, and long-term reliability are critical.

FAQ

What is the maximum safe operating temperature for ZXT951KQTC?

The ZXT951KQTC has an operating junction temperature range of -55°C to +150°C. Its thermal resistance (R_θJL = 1.77°C/W) allows sustained operation at full -6A current when mounted on ≥25mm × 25mm 2oz copper, provided ambient temperature stays below +105°C per derating curves in DS38410 Rev. 1–2.

Does ZXT951KQTC require a base resistor in typical switching applications?

Yes - a series base resistor is required to limit IB to -600mA max at -6A IC. For example, with -5V drive and V_BE(SAT) ≈ -1.2V, a 6.3Ω resistor sets IB ≈ -600mA. This prevents base overcurrent and ensures stable saturation without secondary breakdown risk.

How does ZXT951KQTC's gain stability compare across temperature?

h_FE remains ≥100 at -2A from -55°C to +100°C per DS38410 Figure 5. At +125°C, gain drops to ~70, still sufficient for most automotive switching applications with proper base drive margin. This stability exceeds standard commercial BJTs and supports closed-loop designs without gain compensation.

Can ZXT951KQTC be used in linear regulator applications?

No - its SOA curve (DS38410 Figure 1) shows limited linear operation area. At V_CE = -10V, max continuous IC is ~0.5A due to thermal limits. It is optimized for saturated switching, not analog regulation; use dedicated LDOs or Darlington pairs for linear control.

ZXT951KQTC Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 6 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 600mA, 6A

Current - Collector Cutoff (Max):: 20nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 2A, 1V

Power - Max:: 2.1 W

Frequency - Transition:: 120MHz

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252 (DPAK)

ZXT951KQTC FAQ

1.How can I place an order for ZXT951KQTC through Aetrix?

Please submit a Request for Quotation (RFQ) for ZXT951KQTC 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 ZXT951KQTC reliable?

The price and inventory of ZXT951KQTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXT951KQTC is usually 5 days.

3.What payment methods are accepted for ZXT951KQTC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXT951KQTC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZXT951KQTC?

ZXT951KQTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZXT951KQTC 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 ZXT951KQTC?

For technical support, including ZXT951KQTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXT951KQTC requirements.

6.How does Aetrix verify that ZXT951KQTC is sourced from the original manufacturer or authorized distributors?

All ZXT951KQTC 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 ZXT951KQTC meets industry standards.

7.What is the process for return or replacement of ZXT951KQTC?

All ZXT951KQTC units undergo pre-shipment inspection (PSI). If there is an issue with ZXT951KQTC, 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 ZXT951KQTC part is unused and in its original packaging.

Return procedure for ZXT951KQTC:

1.Submit a request within 90 days.

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

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

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…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

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…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

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.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

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.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

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…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

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…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

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…