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

Diodes Incorporated ZTX1053A

Name: ZTX1053A
Brand: Diodes Incorporated
SKU: ZTX1053A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZTX1053A

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: E-Line-3

Datasheet:: ZTX1053A.pdf

Description:: TRANS NPN 75V 3A E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:2,650

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Product details

Overview

ZTX1053A from Diodes Incorporated is an NPN silicon planar medium-power high-gain transistor rated for 75 V V_CEO, 3 A continuous collector current, and 10 A peak pulse current, with V_CE(sat) as low as 120 mV at I_C = 1 A / I_B = 10 mA. It delivers h_FE ≥ 260 at I_C = 10 mA and supports automotive switching and DC-DC converter applications requiring robust thermal performance up to +200°C junction temperature.

For engineers reviewing the ZTX1053A datasheet, ZTX1053A pinout, ZTX1053A application, or ZTX1053A equivalent, key selection considerations include its E-Line TO-92 compatible package, low saturation voltage under high-current switching, gain stability across 10 mA–3 A operating range, and AEC-Q101 qualification readiness for automotive-grade designs.

Technical Context

The ZTX1053A operates as a medium-power NPN bipolar junction transistor optimized for linear amplification and hard-switching duty in power conversion stages. Its high h_FE (up to 1200 at I_C = 10 A) enables efficient base drive reduction, while f_T = 140 MHz supports fast turn-on/turn-off transitions.

Designed for operation up to +200°C junction temperature, it features low output capacitance (C_obo = 21–30 pF) and fast switching times (t_on = 90 ns, t_off = 750 ns), making it suitable for high-frequency DC-DC topologies where conduction loss and switching loss trade-offs are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	75 V - Maximum safe collector-emitter voltage under open-base conditions; defines upper limit for switch blocking capability.
I_C (cont.)	3 A - Continuous DC collector current rating at T_amb = +25°C; determines steady-state power stage sizing.
V_CE(sat)	120 mV @ I_C=1A/I_B=10mA - Low saturation voltage minimizes conduction loss in saturated-switch applications.
h_FE	260–1200 - Wide DC current gain range across 10 mA–10 A; supports stable biasing in both small-signal and power-switching modes.
f_T	140 MHz - Transition frequency confirms usable bandwidth for high-speed switching control loops.
t_off	750 ns - Measured with I_C=2A, ±20mA base drive; defines minimum off-time in PWM-controlled converters.
T_J max	+200°C - Maximum junction temperature rating enables operation in under-hood automotive environments without derating.

Pinout & Package

The ZTX1053A is housed in an E-Line (TO-92 compatible) plastic package with 3 leads: emitter, base, and collector. The package meets JEDEC TO-92 mechanical standards and is optimized for through-hole mounting with thermal pad compatibility.

Pin/Terminal	Circuit Role	Design Meaning
Emitter (E)	Current sink terminal	Connected to ground or low-side return path; carries full load current in common-emitter configuration.
Base (B)	Control input	Receives current-limited drive signal; requires ~100 mA for full saturation at 3 A collector current.
Collector (C)	Current source terminal	Connected to switched load or supply rail; handles up to 75 V reverse bias when off.

Key Features

Feature	Design Value
High DC current gain	h_FE ≥ 260 at I_C = 10 mA ensures reliable low-drive switching in microcontroller-driven circuits.
Low V_CE(sat)	120 mV at I_C = 1 A reduces power dissipation by >30% vs. standard general-purpose transistors at same current.
Fast switching	t_on/t_off = 90/750 ns enables operation in 100+ kHz DC-DC converters with minimal dead-time overhead.
High-temperature operation	Rated for T_J = –55°C to +200°C supports use in engine-control modules and industrial motor drives.
AEC-Q101 readiness	Manufactured in IATF 16949-certified facilities and PPAP-capable-enables accelerated qualification for automotive programs.

Applications

Automotive Lighting Control

Industrial DC-DC Converter

Use Scenario: Driving high-intensity LED arrays in headlamp modules with PWM dimming.

IC Role / Device Role / Timing Role: NPN switch controlling LED current path between battery rail and ground.

Use Value: Low V_CE(sat) minimizes heat generation in confined headlamp housings; 200°C rating avoids thermal shutdown during prolonged operation.

Use Scenario: Synchronous rectifier or main switch in isolated flyback converters for PLC power supplies.

IC Role / Device Role / Timing Role: Medium-power switching element in primary-side regulation topology.

Use Value: High h_FE allows direct MCU GPIO drive without external buffer; fast t_off supports 200 kHz+ switching frequencies.

Engine Control Unit (ECU) Solenoid Driver

Power Supply Sequencing Circuit

Use Scenario: Driving fuel injector solenoids requiring precise 3 A pulsed current with <100 µs response.

IC Role / Device Role / Timing Role: High-current saturated switch interfacing MCU outputs to inductive loads.

Use Value: 10 A pulse rating accommodates solenoid inrush; built-in V_CEV = 150 V protects against inductive kickback.

Use Scenario: Enabling/disabling auxiliary rails (e.g., 5 V → 3.3 V LDO input) during system boot-up.

IC Role / Device Role / Timing Role: Low-loss series pass element controlled by supervisor IC.

Use Value: Stable h_FE across temperature ensures predictable turn-on timing; E-Line package simplifies layout in space-constrained PCBs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX1048A	Lower V_CEO (60 V), lower h_FE (min 100), same E-Line package	Not suitable for 75 V bus applications; limited to ≤48 V systems	Select only if V_CEO margin is sufficient and cost sensitivity outweighs gain/stress requirements.
MJD122G	TO-220 package, higher P_tot (1.5 W), V_CEO = 100 V, h_FE min = 50	Requires heatsink for >1 A continuous; incompatible footprint	Choose when higher power dissipation or higher voltage blocking is needed, and board space permits larger package.

Compared with ZTX1048A and MJD122G, the ZTX1053A uniquely balances high gain, low saturation voltage, and 75 V rating in a compact E-Line package-making it optimal for space-constrained, thermally demanding automotive and industrial switching where drive efficiency and reliability are prioritized over raw power handling.

Availability

ZTX1053A is available at Aetrix Electronics and suitable for automotive lighting control, industrial DC-DC converters, and engine control unit (ECU) solenoid drivers requiring stable component supply and long-term lifecycle support.

Supply support for ZTX1053A 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.

The ZTX1053A belongs to Diodes' high-gain NPN transistor product line, engineered specifically for medium-power switching applications demanding low V_CE(sat), wide h_FE range, and extended temperature capability.

FAQ

Is the ZTX1053A qualified to AEC-Q101?

No, the ZTX1053A itself is not AEC-Q101 certified per official Diodes documentation. However, it is manufactured in IATF 16949-certified facilities and supports PPAP submission-enabling customer-led qualification for automotive programs. Final certification requires full test execution per AEC-Q101 Rev H requirements.

What is the maximum allowable base current for continuous operation?

The absolute maximum base current is 500 mA, but continuous operation above 100 mA is not recommended without thermal derating. At I_C = 3 A, typical base drive is 100 mA; sustained I_B > 200 mA risks localized heating and gain degradation due to package thermal resistance limitations.

Can the ZTX1053A replace the ZTX1049A in existing designs?

Yes, with verification: both share identical E-Line packaging and pinout, and ZTX1053A offers higher V_CEO (75 V vs. 60 V) and higher h_FE. However, V_CE(sat) is slightly higher at 3 A (180 mV vs. 150 mV for ZTX1049A), so thermal validation is required in high-duty-cycle applications.

Why does the datasheet state "NOT RECOMMENDED FOR NEW DESIGNS"?

Diodes has designated ZTX1053A as legacy due to newer alternatives (e.g., ZXT1053A in SOT-89) offering improved thermal performance and surface-mount compatibility. However, ZTX1053A remains fully supported for existing production, with no announced obsolescence date or last-time-buy notice as of June 2026.

ZTX1053A Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: E-Line-3

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 75 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 100mA, 3A

Current - Collector Cutoff (Max):: 10nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 1A, 2V

Power - Max:: 1 W

Frequency - Transition:: 140MHz

Operating Temperature:: -55°C ~ 200°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: E-Line (TO-92 compatible)

ZTX1053A FAQ

1.How can I place an order for ZTX1053A through Aetrix?

Please submit a Request for Quotation (RFQ) for ZTX1053A 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 ZTX1053A reliable?

The price and inventory of ZTX1053A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX1053A is usually 5 days.

3.What payment methods are accepted for ZTX1053A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX1053A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZTX1053A?

ZTX1053A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZTX1053A 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 ZTX1053A?

For technical support, including ZTX1053A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX1053A requirements.

6.How does Aetrix verify that ZTX1053A is sourced from the original manufacturer or authorized distributors?

All ZTX1053A 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 ZTX1053A meets industry standards.

7.What is the process for return or replacement of ZTX1053A?

All ZTX1053A units undergo pre-shipment inspection (PSI). If there is an issue with ZTX1053A, 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 ZTX1053A part is unused and in its original packaging.

Return procedure for ZTX1053A:

1.Submit a request within 90 days.

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

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