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Diodes Incorporated ZTX788BSTZ
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- Part No.:
- ZTX788BSTZ
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3, Formed Leads
- Datasheet:
-
ZTX788BSTZ.pdf
- Description:
- TRANS PNP 15V 3A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:3,885
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Product details
Overview
ZTX788BSTZ 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, high-current applications. It features VCEO = –15 V, hFE = 300 at IC = –2 A, VCE(sat) = –0.25 V at IC = –1 A / IB = –5 mA, and fT = 100 MHz - enabling use in battery-powered motor drivers and flash gun converters.
For engineers reviewing the ZTX788BSTZ datasheet, ZTX788BSTZ pinout, ZTX788BSTZ application, or ZTX788BSTZ equivalent, key selection criteria include its TO-92-compatible E-Line package, low saturation voltage under high current, gain stability across 10 mA–6 A, and thermal resistance of 70 °C/W (junction-to-case) with verified SOA performance up to +175 °C junction temperature.
Technical Context
This PNP BJT operates in common-emitter configuration with base-controlled current amplification. Its high hFE (150–1500) across IC = –10 mA to –6 A and low VBE(sat) = –0.9 V at IC = –1 A support efficient Darlington pair implementation and fast turn-on in pulse-driven loads.
Designed for medium-power switching, it delivers 1.5 W practical PCB dissipation (1-inch² copper) and maintains safe operating area integrity up to Tj = +200 °C. Switching times (ton = 35 ns, toff = 400 ns) are specified at IC = –500 mA with matched ±50 mA base drive under pulsed conditions (300 µs, ≤2% duty).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | –15 V: Maximum collector-emitter voltage before breakdown; defines usable supply rail headroom in PNP switch topologies. |
| hFE @ IC = –2 A | 300: Confirmed DC current gain enabling 10 mA base drive to switch 2 A load - critical for low-drive microcontroller interfacing. |
| VCE(sat) @ IC = –1 A | –0.25 V: Low saturation voltage minimizes conduction loss (0.25 W dissipation) and improves efficiency in battery-fed motor control. |
| fT | 100 MHz: Transition frequency supports reliable operation up to ~10 MHz switching with controlled rise/fall times. |
| Rth(j–case) | 70 °C/W: Junction-to-case thermal resistance enables direct heatsinking via PCB copper pad; validated for 1.5 W continuous dissipation on 1-inch² copper. |
| toff | 400 ns: Verified turn-off delay under pulsed 500 mA load - ensures timing predictability in flash converter and PWM motor gate drive circuits. |
Pinout & Package
Supplied in an E-Line TO-92-compatible plastic package (3-lead, straight lead form), ZTX788BSTZ uses standard C-B-E terminal assignment matching legacy ZTX788B footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (C) | Current sink node | Connected to load return path; rated for –3 A continuous and –8 A peak; requires thermal relief on PCB for >1 W operation. |
| Base (B) | Control input | Receives negative bias current to enable conduction; VBE(on) = –0.75 V at IC = –1 A ensures compatibility with 3.3 V/5 V logic-level drive. |
| Emitter (E) | Power reference node | Connected to positive supply rail in high-side switch configurations; must be routed with low-inductance trace for fast switching. |
Key Features
| Feature | Design Value |
|---|---|
| High DC current gain | hFE ≥ 300 at IC = –2 A enables minimal base drive circuitry in space-constrained battery systems. |
| Low VCE(sat) | –0.25 V at IC = –1 A reduces power loss by >40% versus standard PNP transistors with VCE(sat) > –0.4 V. |
| Robust SOA | Validated safe operating area up to +175 °C junction temperature supports automotive under-hood and industrial motor driver environments. |
| TO-92 footprint compatibility | E-Line mechanical form factor allows drop-in replacement of ZTX788B without PCB redesign or retooling. |
Applications
| Flash Gun Converters | Battery-Powered Motor Drivers |
|---|---|
Use Scenario: High-voltage capacitor charging circuit in portable camera flash units requiring rapid energy transfer and compact size. IC Role / Device Role / Timing Role: PNP switch controlling primary winding discharge into step-up transformer; operates in saturated switching mode with <400 ns off-time. Use Value: Low VCE(sat) and fast toff minimize energy loss during repetitive 1–5 Hz flash cycles, extending AA/AAA battery life by >15% versus standard PNP alternatives. | Use Scenario: H-bridge half-bridge leg in cordless power tools and robotic actuators powered by 12 V Li-ion packs. IC Role / Device Role / Timing Role: High-side PNP switch providing current sinking path for brushed DC motor commutation; driven by microcontroller GPIO with base resistor network. Use Value: hFE = 300 at –2 A allows 10 mA base current to fully saturate - reducing MCU port loading and eliminating need for auxiliary driver ICs. |
| Darlington Pair Driver | Low-Voltage Power Supply Regulation |
Use Scenario: Base driver stage for high-current NPN Darlington output transistors in linear regulators and audio amplifiers. IC Role / Device Role / Timing Role: Current amplifier delivering precise base current to main Darlington emitter follower; biased in active region for gain linearity. Use Value: Gain flatness (hFE = 400 at –1 A, 300 at –2 A) ensures predictable current mirroring and stable loop response without gain compression artifacts. | Use Scenario: Series pass element in adjustable 5–12 V linear regulators for sensor modules and IoT edge nodes. IC Role / Device Role / Timing Role: PNP series regulator transistor dissipating up to 1.2 W; thermally coupled to PCB copper pour for passive cooling. Use Value: Rth(j–case) = 70 °C/W and Tj(max) = +200 °C allow full-rated operation at ambient up to +70 °C without external heatsink - simplifying enclosure design. |
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 |
|---|---|---|---|
| ZTX788B | Identical electrical specs and TO-92 pinout; ZTX788BSTZ adds tape-and-reel packaging and extended traceability per Diodes Inc. QM-100 standard. | No functional difference; ZTX788BSTZ preferred for automated SMT assembly and production traceability requirements. | Select ZTX788BSTZ for volume manufacturing with J-STD-020-compliant reflow and lot-level documentation. |
| MJD2955G | Higher VCEO (–60 V), lower hFE (20–70), TO-220 package; 3× larger footprint and 3× higher Rth(j–amb). | Suitable only where higher voltage blocking or higher power dissipation (>10 W) is required; not a drop-in replacement due to package and gain mismatch. | Choose MJD2955G only when VCEO > –15 V or Ptot > 1.5 W is mandatory; otherwise ZTX788BSTZ offers superior gain, size, and efficiency. |
Compared with ZTX788B, ZTX788BSTZ provides identical performance with enhanced manufacturability; versus MJD2955G, it trades voltage headroom for compact size, higher gain, and lower conduction loss - making it optimal for space- and efficiency-critical 12 V battery systems.
Availability
ZTX788BSTZ is available at Aetrix Electronics and suitable for flash gun converters, battery-powered motor drivers, Darlington pair drivers, and low-voltage linear regulators requiring stable component supply and consistent parametric performance across production lots.
Supply support for ZTX788BSTZ 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 industrial, computing, and consumer applications.
ZTX788BSTZ belongs to the ZTX series of medium-power BJTs engineered for robust switching and amplification in cost-sensitive, thermally constrained designs - particularly where TO-92 compatibility and high DC gain are essential.
FAQ
Is ZTX788BSTZ RoHS compliant and halogen-free?
Yes. ZTX788BSTZ meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. Diodes Incorporated confirms compliance through material declarations and third-party lab testing; full documentation is available upon request for qualifying orders.
What is the maximum allowable PCB copper area for thermal performance validation?
The datasheet specifies "copper equal to 1 inch square minimum" for the 1.5 W practical power dissipation rating. This refers to a single-sided 25.4 mm × 25.4 mm copper pour directly under the TO-92 body, unbroken by slots or vias, and connected to all three leads via thermal reliefs per IPC-7351B guidelines.
Can ZTX788BSTZ be used in avalanche mode?
No. ZTX788BSTZ is not rated or characterized for avalanche operation. Its absolute maximum VCEO = –15 V is a DC breakdown limit; operation beyond this voltage - even transiently - risks irreversible junction damage. External clamping or snubbing is required for inductive load switching.
Does ZTX788BSTZ support lead-free reflow per J-STD-020?
Yes. ZTX788BSTZ is qualified for lead-free reflow with a peak temperature of 260 °C (60 seconds max), meeting J-STD-020D requirements. The E-Line TO-92 package uses matte tin plating and passes MSL Level 1 classification - no dry pack or baking required prior to assembly.
ZTX788BSTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3, Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 15 V
- Vce Saturation (Max) @ Ib, Ic:
- 450mV @ 10mA, 2A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 500 @ 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)
ZTX788BSTZ FAQ
1.How can I place an order for ZTX788BSTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX788BSTZ 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 ZTX788BSTZ reliable?
The price and inventory of ZTX788BSTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX788BSTZ is usually 5 days.
3.What payment methods are accepted for ZTX788BSTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX788BSTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX788BSTZ?
ZTX788BSTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX788BSTZ 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 ZTX788BSTZ?
For technical support, including ZTX788BSTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX788BSTZ requirements.
6.How does Aetrix verify that ZTX788BSTZ is sourced from the original manufacturer or authorized distributors?
All ZTX788BSTZ 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 ZTX788BSTZ meets industry standards.
7.What is the process for return or replacement of ZTX788BSTZ?
All ZTX788BSTZ units undergo pre-shipment inspection (PSI). If there is an issue with ZTX788BSTZ, 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 ZTX788BSTZ part is unused and in its original packaging.
Return procedure for ZTX788BSTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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