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

Diodes Incorporated ZTX792ASTOA

Name: ZTX792ASTOA
Brand: Diodes Incorporated
SKU: ZTX792ASTOA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZTX792ASTOA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: E-Line-3, Formed Leads

Datasheet:: ZTX792ASTOA.pdf

Description:: TRANS PNP 70V 2A E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:2,743

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Product details

Overview

ZTX792ASTOA from Diodes Incorporated is a PNP silicon planar medium-power high-gain bipolar junction transistor (BJT), designed for switching and linear amplification in low-voltage, moderate-current circuits. It delivers V_CEO = −70 V, h_FE = 300–800 at I_C = −10 mA to −1 A, V_CE(sat) = −0.45 V (typ.) at I_C = −500 mA/I_B = −5 mA, and operates across −55°C to +200°C junction temperature. It is commonly used in battery-powered motor drivers and flash gun converters.

For engineers reviewing the ZTX792ASTOA datasheet, ZTX792ASTOA pinout, ZTX792ASTOA application, or ZTX792ASTOA equivalent, key selection considerations include its PNP polarity, TO-92 compatible package, −2 A continuous collector current rating, low saturation voltage under high drive, and suitability for Darlington pair emitter-follower stages in portable power conversion.

Technical Context

This BJT is optimized for medium-power switching with high DC current gain and low on-state losses. Its −70 V V_CEO and −75 V V_CBO support operation in 48 V and lower industrial rails, while f_T = 100 MHz enables use in audio-frequency switching and pulse-width modulation up to ~100 kHz.

The device exhibits strong thermal robustness: R_th(j-amb) = 175°C/W on standard PCB (1 in² copper), and safe operating area (SOA) validated for single-pulse and DC conditions up to +175°C ambient. Saturation behavior is characterized across I_C/I_B ratios of 10–100, supporting predictable base drive design.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−70 V - Maximum collector-emitter blocking voltage before breakdown; defines usable supply rail headroom in PNP switch configurations.
h_FE	300–800 - DC current gain range at I_C = −10 mA to −1 A; enables low-base-drive designs for efficient switching in battery-constrained systems.
V_CE(sat)	−0.45 V (typ.) at I_C = −500 mA/I_B = −5 mA - Low conduction loss reduces heat generation in motor driver and converter output stages.
P_tot	1.5 W (PCB-mounted) - Practical power dissipation limit on 1 in² copper; sets maximum continuous I_C²R_CE(sat) load under natural convection.
f_T	100 MHz - Transition frequency at I_C = −50 mA/V_CE = −5 V; supports fast turn-on/turn-off in PWM-driven loads up to ~100 kHz.
T_j Range	−55°C to +200°C - Junction temperature operating and storage range; qualified for under-hood automotive and industrial environments.

Pinout & Package

Package: TO-92 compatible (E-Line 3-282), epoxy-molded, through-hole mounting. Standard lead configuration with defined mechanical orientation per Diodes Incorporated drawing 3-282.

Pin/Terminal	Circuit Role	Design Meaning
E (Emitter)	Current source terminal for PNP operation	Connected to higher potential rail (e.g., V_CC) in common-emitter switches; anchors Darlington input stage.
B (Base)	Control electrode for minority-carrier injection	Receives negative current to turn on; requires external current-limiting resistor for TTL/CMOS drive compatibility.
C (Collector)	Current sink terminal	Connected to load and ground return path; carries full switched current with minimal V_CE(sat) drop.

Key Features

Feature	Design Value
High DC current gain	h_FE ≥ 300 at I_C = −1 A - Reduces required base drive current by >3× vs. standard medium-power PNP transistors.
Low saturation voltage	V_CE(sat) ≤ −0.5 V at I_C = −2 A - Limits conduction loss to <1 W at full rated current, easing thermal management on compact PCBs.
Extended temperature capability	T_j up to +200°C - Enables deployment in sealed enclosures or near heat sources without derating penalties.
TO-92 mechanical compatibility	Pinout and footprint match JEDEC TO-92 - Allows drop-in replacement in legacy designs using ZTX750, BC557, or MPSA92 footprints.

Applications

Motor Driver Stage

Flash Gun Converter

Use Scenario: Driving brushed DC motors in portable tools or robotics where supply is 12–24 V and peak current reaches 1.5 A.

IC Role / Device Role / Timing Role: PNP switch in common-emitter configuration, sinking motor current to ground during active phase.

Use Value: V_CE(sat) ≤ −0.5 V minimizes I²R heating at 1.5 A, extending battery life and reducing heatsink requirements.

Use Scenario: High-voltage charge pump in camera flash units requiring rapid capacitor discharge into xenon tube.

IC Role / Device Role / Timing Role: Switching element in flyback or Royer oscillator topology, controlling primary-side energy transfer.

Use Value: −70 V V_CEO safely handles reflected flyback spikes up to −60 V, eliminating need for snubbers in compact designs.

Darlington Input Pair

Battery-Powered Load Switch

Use Scenario: First-stage emitter follower in high-gain Darlington pair for precision current regulation in LED drivers.

IC Role / Device Role / Timing Role: Provides high-input-impedance, low-output-impedance buffering between control IC and power transistor.

Use Value: h_FE ≥ 800 at low I_C ensures stable biasing with microampere-level control currents, improving efficiency.

Use Scenario: Reverse-polarity protection and ON/OFF control in 9 V or 12 V battery-powered instrumentation.

IC Role / Device Role / Timing Role: High-side PNP switch enabling load disconnect with minimal quiescent current leakage.

Use Value: I_CBO ≤ −0.1 µA ensures <100 nA standby drain, preserving battery shelf life over months of storage.

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
ZTX751ASTOA	V_CEO = −60 V, h_FE = 200–600, P_tot = 1.0 W	Lower voltage rating and gain; reduced SOA at high I_C	Acceptable where rail voltage ≤ 42 V and gain margin >2× is available in system design.
MPSA92	V_CEO = −300 V, h_FE = 25–250, P_tot = 0.625 W	Higher voltage but significantly lower gain and power handling	Suitable only for high-voltage, low-current signal switching-not for motor or converter output stages.

Compared with ZTX792ASTOA, ZTX751ASTOA trades voltage headroom and thermal capacity for cost-sensitive legacy replacements, while MPSA92 serves ultra-high-voltage niche roles but cannot replicate the combination of gain, saturation performance, and power density needed in modern battery-powered converters.

Availability

ZTX792ASTOA is available at Aetrix Electronics and suitable for motor drivers, flash converters, Darlington amplifier stages, and battery-powered load switches requiring stable component supply and long-term manufacturability.

Supply support for ZTX792ASTOA 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The ZTX series targets medium-power bipolar transistors for industrial, automotive, and consumer power management-emphasizing reliability, thermal resilience, and direct replaceability in legacy through-hole designs.

FAQ

Is ZTX792ASTOA RoHS compliant and halogen-free?

Yes. ZTX792ASTOA meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. The device uses lead-free matte tin plating on leads and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 for unlimited floor life at ≤30°C/85% RH.

What is the recommended PCB layout for thermal performance?

Mount ZTX792ASTOA on FR-4 with ≥1 in² (2.54 cm²) of 2-oz copper connected directly to the emitter pad. Use thermal vias under the emitter pad (≥4 × 0.3 mm diameter) to inner-layer ground planes. Avoid solder mask over thermal copper to maximize convection cooling.

Can ZTX792ASTOA be used in linear regulator pass elements?

No. While it operates within safe SOA limits at DC, its V_CE(sat) is specified only for switching conditions, and no guaranteed h_FE stability or thermal runaway data is provided for linear pass operation. It is not characterized or qualified for continuous linear regulation.

Does ZTX792ASTOA have SPICE model support?

Yes. Diodes Incorporated provides a verified VBIC-based SPICE model for ZTX792A (identical electrical spec) on their official website, covering DC, AC, and transient behavior from −55°C to +150°C. Model parameters are extracted from production wafer lots and validated against measured f_T, C_obo, and SOA curves.

ZTX792ASTOA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: E-Line-3, Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 2 A

Voltage - Collector Emitter Breakdown (Max):: 70 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 200mA, 2A

Current - Collector Cutoff (Max):: 100nA (ICBO)

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

Power - Max:: 1 W

Frequency - Transition:: 100MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

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

ZTX792ASTOA FAQ

1.How can I place an order for ZTX792ASTOA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZTX792ASTOA 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 ZTX792ASTOA reliable?

The price and inventory of ZTX792ASTOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX792ASTOA is usually 5 days.

3.What payment methods are accepted for ZTX792ASTOA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX792ASTOA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZTX792ASTOA?

ZTX792ASTOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZTX792ASTOA 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 ZTX792ASTOA?

For technical support, including ZTX792ASTOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX792ASTOA requirements.

6.How does Aetrix verify that ZTX792ASTOA is sourced from the original manufacturer or authorized distributors?

All ZTX792ASTOA 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 ZTX792ASTOA meets industry standards.

7.What is the process for return or replacement of ZTX792ASTOA?

All ZTX792ASTOA units undergo pre-shipment inspection (PSI). If there is an issue with ZTX792ASTOA, 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 ZTX792ASTOA part is unused and in its original packaging.

Return procedure for ZTX792ASTOA:

1.Submit a request within 90 days.

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

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