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Diodes Incorporated ZTX1053ASTOB
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- Part No.:
- ZTX1053ASTOB
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3, Formed Leads
- Datasheet:
-
ZTX1053ASTOB.pdf
- Description:
- TRANS NPN 75V 3A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:2,121
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Product details
Overview
ZTX1053A from Diodes Incorporated is an NPN silicon planar medium-power high-gain transistor with VCEO = 75 V, continuous collector current IC = 3 A, pulse current ICM = 10 A, VCE(sat) ≤ 250 mV at IC = 3 A / IB = 100 mA, and hFE up to 1200 at IC = 10 mA - used in automotive switching circuits and DC-DC converter power stages.
For engineers reviewing the ZTX1053A datasheet, ZTX1053A pinout, ZTX1053A application, or ZTX1053A equivalent, key selection criteria include saturation voltage under high-current switching, thermal stability across −55°C to +200°C operating range, AEC-Q101 qualification readiness, and E-Line package thermal performance for board-level power density.
Technical Context
The ZTX1053A operates as a medium-power NPN bipolar junction transistor optimized for linear and saturated switching modes. Its high hFE (260–1200) enables low base drive requirements, while VCE(sat) of 120–250 mV across 0.2–3 A supports efficient conduction loss management in automotive and industrial power control.
Designed for robust thermal operation, it features a maximum junction temperature of +200°C and Ptot = 1 W at Tamb = +25°C, with SPICE parameters including BF = 600, VAF = 100 V, and Cobo = 21–30 pF - confirming suitability for mid-frequency (<140 MHz fT) switching applications with controlled turn-on/turn-off timing (ton = 90 ns, toff = 750 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 75 V - Maximum safe collector-emitter voltage before breakdown under open-base conditions. |
| IC (continuous) | 3 A - Sustained collector current rating defining steady-state power stage capacity. |
| VCE(sat) | 120–250 mV - Low saturation voltage ensures <0.75 W conduction loss at 3 A, reducing thermal stress. |
| hFE | 260–1200 - High DC current gain enables minimal base drive current, easing driver design. |
| fT | 140 MHz - Transition frequency supports stable operation in DC-DC converters up to ~10 MHz switching. |
| TJ range | −55°C to +200°C - Extended junction temperature rating meets automotive under-hood requirements. |
| Ptot | 1 W - Total power dissipation limit at ambient 25°C, requiring heatsinking above ~0.5 W in practice. |
Pinout & Package
The ZTX1053A is housed in the E-Line (TO-92 variant) plastic package with 3 leads: emitter, base, and collector. This through-hole package provides mechanical robustness and thermal path via leadframe, rated for manual or wave-solder assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Low-impedance output node; connected to ground or low-side return path in switch configurations. |
| Base (B) | Control input | Receives current-limited drive signal; requires ~100 mA for full saturation at 3 A collector load. |
| Collector (C) | High-side power node | Connects to supply rail or inductive load; withstands 75 V VCEO and handles 10 A pulsed current. |
Key Features
| Feature | Design Value |
|---|---|
| High current gain (hFE) | Up to 1200 at IC = 10 mA - reduces base drive circuit complexity and power consumption. |
| Low VCE(sat) | 120 mV typical at IC = 1 A / IB = 10 mA - minimizes conduction losses in high-duty-cycle switching. |
| High VCEO | 75 V - supports 48 V automotive systems and 24 V industrial rails with margin. |
| Extended temperature range | −55°C to +200°C - qualified for engine bay and powertrain environments without derating. |
| Pulse current capability | 10 A peak - enables short-duration surge handling in motor drive or solenoid control. |
Applications
| Automotive Lighting Control | Industrial DC-DC Converter |
|---|---|
Use Scenario: Driving high-intensity LED headlamps or rear lighting modules in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: NPN switch controlling LED current path with PWM dimming at up to 1 kHz. Use Value: VCE(sat) ≤ 250 mV at 3 A limits heat generation in confined lamp housings, supporting IP67-rated assemblies. | Use Scenario: High-side switching in non-isolated buck converter for 5 V/3.3 V auxiliary rail generation. IC Role / Device Role / Timing Role: Medium-power pass transistor in discrete step-down regulator with external controller. Use Value: hFE ≥ 420 at 1 A ensures stable regulation under load transients without gate-driver complexity. |
| Engine Control Unit (ECU) Solenoid Driver | Power Supply Overcurrent Protection |
Use Scenario: Actuating fuel injectors or idle air control valves requiring precise 10 ms on/off pulses. IC Role / Device Role / Timing Role: Saturated switch delivering 2–3 A pulses with toff = 750 ns for fast valve closure. Use Value: 10 A pulse rating accommodates inrush currents during cold-start solenoid engagement. | Use Scenario: Current-limiting element in foldback protection circuit for 24 V industrial power supplies. IC Role / Device Role / Timing Role: Linear-mode current limiter activated during overcurrent events. Use Value: 200°C max junction temperature allows sustained operation during fault conditions without thermal shutdown. |
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 | VCEO = 60 V, IC = 2 A, hFE = 150–800 | Limited to 24 V systems; lower current and gain reduce margin in 48 V or high-dynamic-load use cases. | Select when cost sensitivity outweighs voltage/current headroom needs. |
| MJD122 | VCEO = 100 V, IC = 8 A, TO-252 package, higher Ptot | Surface-mount, higher thermal mass; requires PCB copper area for 1 W+ dissipation. | Choose for automated assembly and higher continuous power where E-Line footprint is not required. |
Compared with ZTX1048A and MJD122, the ZTX1053A uniquely balances 75 V rating, 3 A continuous current, and through-hole E-Line reliability for legacy automotive and industrial designs - offering higher VCEO than ZTX1048A and simpler mounting than MJD122's DPAK footprint.
Availability
ZTX1053A is available at Aetrix Electronics and suitable for automotive lighting control, industrial DC-DC converters, and ECU solenoid drivers requiring stable component supply and long-term obsolescence management.
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 ZTX series targets medium-power bipolar switching applications demanding high gain, low saturation voltage, and extended temperature operation - developed specifically for automotive subsystems and ruggedized industrial controls.
FAQ
Is the ZTX1053A AEC-Q101 qualified?
No, the ZTX1053A is not AEC-Q101 qualified per its datasheet. However, Diodes states that automotive-grade versions with AEC-Q101 qualification, PPAP capability, and IATF 16949 manufacturing are available upon request - contact Diodes or an authorized distributor for qualified variants like ZTX1053A-Q.
What is the recommended PCB pad layout for the E-Line package?
The official Diodes E-Line outline specifies pad dimensions: D = 4.37–4.77 mm (length), E = 3.61–4.01 mm (width), e = 1.27 mm (lead pitch), with 0.70 mm max hole diameter. Thermal relief pads with ≥1.5 mm copper extension are advised to improve solder joint reliability and heat dissipation.
Can the ZTX1053A replace the ZTX1049A in existing designs?
Yes, with verification: both share E-Line packaging and pinout, but ZTX1053A has higher VCEO (75 V vs. 60 V) and higher hFE (up to 1200 vs. 800). Ensure base drive and thermal design accommodate the improved gain and voltage margin - no circuit changes needed for drop-in replacement in most 24 V applications.
Why does the datasheet state "NOT RECOMMENDED FOR NEW DESIGNS"?
This notice indicates Diodes' strategic shift toward newer high-efficiency alternatives (e.g., MOSFETs or QFN-packaged BJTs) for new projects. The ZTX1053A remains fully manufactured and supported for legacy program continuity, with no announced discontinuance date or last-time-buy constraints as of June 2026.
ZTX1053ASTOB 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:
- NPN
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 75 V
- Vce Saturation (Max) @ Ib, Ic:
- 350mV @ 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)
ZTX1053ASTOB FAQ
1.How can I place an order for ZTX1053ASTOB through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX1053ASTOB 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 ZTX1053ASTOB reliable?
The price and inventory of ZTX1053ASTOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX1053ASTOB is usually 5 days.
3.What payment methods are accepted for ZTX1053ASTOB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX1053ASTOB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX1053ASTOB?
ZTX1053ASTOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX1053ASTOB 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 ZTX1053ASTOB?
For technical support, including ZTX1053ASTOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX1053ASTOB requirements.
6.How does Aetrix verify that ZTX1053ASTOB is sourced from the original manufacturer or authorized distributors?
All ZTX1053ASTOB 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 ZTX1053ASTOB meets industry standards.
7.What is the process for return or replacement of ZTX1053ASTOB?
All ZTX1053ASTOB units undergo pre-shipment inspection (PSI). If there is an issue with ZTX1053ASTOB, 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 ZTX1053ASTOB part is unused and in its original packaging.
Return procedure for ZTX1053ASTOB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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