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Diodes Incorporated ZTX788BSTOB
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- Part No.:
- ZTX788BSTOB
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3, Formed Leads
- Datasheet:
-
ZTX788BSTOB.pdf
- Description:
- TRANS PNP 15V 3A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:3,325
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Product details
Overview
ZTX788BSTOB 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 paths. It features VCEO = –15 V, hFE = 300 at IC = –2 A, VCE(sat) = –0.25 V (typ.) at IC = –1 A / IB = –5 mA, and operates from –55°C to +200°C - used in motor drivers and flash gun converters where low saturation voltage and robust thermal performance are critical.
For engineers reviewing the ZTX788BSTOB datasheet, ZTX788BSTOB pinout, ZTX788BSTOB application, or ZTX788BSTOB equivalent, key selection criteria include verified PNP switching capability at ≥2 A continuous collector current, confirmed TO-92-compatible E-Line package mounting, validated VCE(sat) ≤ –0.45 V under pulsed load, and documented hFE stability across IC = –10 mA to –6 A.
Technical Context
This BJT employs a planar epitaxial structure optimized for high DC current gain and low on-state losses in medium-power PNP configurations. Its breakdown ratings (VCBO = VCEO = –15 V, VEBO = –5 V) and fT = 100 MHz at IC = –50 mA enable reliable operation in fast-switching DC-DC stages and analog amplifier stages up to ~10 MHz.
Thermal design is supported by Rth(j–amb) = 116 °C/W (PCB-mounted, 1 in² copper) and Rth(j–case) = 70 °C/W, with safe operating area (SOA) validated for single-pulse conditions up to IC = –8 A and VCE = –10 V - critical for transient load handling in battery-powered motor control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | –15 V: Maximum allowable collector-emitter voltage before avalanche conduction in common-emitter configuration. |
| hFE @ IC = –2 A | 300: Confirmed DC current gain enabling base drive reduction in high-current Darlington driver stages. |
| VCE(sat) @ IC = –1 A | –0.25 V (typ.): Low saturation voltage minimizes power loss and heat generation in switching applications. |
| fT | 100 MHz: Transition frequency supports stable amplification or switching up to mid-frequency analog/SMPS control loops. |
| Rth(j–amb) | 116 °C/W: Thermal resistance when mounted on 1 in² PCB copper - defines maximum ambient temperature for 1.5 W continuous dissipation. |
| IC (continuous) | –3 A: Rated collector current for sustained operation without derating below 25°C ambient. |
| toff | 400 ns: Measured turn-off time under IC = –500 mA, confirming suitability for <1 µs switching cycles. |
Pinout & Package
Package: E-Line TO-92-compatible plastic package (3-lead, straight lead form), compliant with JEDEC TO-92 outline dimensions and thermal mounting requirements (1 in² minimum copper area).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal in PNP configuration | Connected to most positive rail in high-side switch; requires low-impedance return path for full current capability. |
| Base (B) | Control input for minority-carrier injection | Requires negative bias relative to emitter to forward-bias BE junction; typical IB = –5 mA drives IC = –1 A. |
| Collector (C) | Current source terminal in PNP configuration | Connected to load; voltage swing limited to –15 V max relative to emitter; primary heat path to PCB via leadframe. |
Key Features
| Feature | Design Value |
|---|---|
| High hFE at high current | hFE ≥ 300 at IC = –2 A reduces base drive circuit complexity and power loss in power stage interfaces. |
| Low VCE(sat) | VCE(sat) ≤ –0.45 V at IC = –2 A ensures <0.9 W conduction loss at 2 A, easing thermal management in compact designs. |
| Wide temperature range | –55°C to +200°C junction rating enables deployment in automotive engine compartments and industrial motor controllers without derating. |
| Fast switching | ton/toff = 35/400 ns supports PWM frequencies >250 kHz in DC-DC converters and flash charging circuits. |
Applications
| Motor Driver Stages | Flash Gun Converters |
|---|---|
Use Scenario: Driving brushed DC motors in portable tools and robotics requiring bidirectional control via H-bridge PNP high-side switches. IC Role / Device Role / Timing Role: PNP BJT configured as saturated switch in high-side position, delivering up to 2 A load current with minimal voltage drop. Use Value: VCE(sat) ≤ –0.25 V (typ.) at IC = –1 A reduces power loss by >40% vs. standard general-purpose PNP transistors. | Use Scenario: Charging and discharging high-voltage capacitor banks in photographic flash units powered by 6–12 V batteries. IC Role / Device Role / Timing Role: Fast-switching PNP transistor controlling primary winding of step-up transformer during energy transfer pulses. Use Value: toff = 400 ns enables precise timing control of flash duration and repeat rate up to 10 Hz. |
| Darlington Pair Drivers | Battery-Powered Load Switches |
Use Scenario: Replacing lower-gain Darlingtons in industrial sensor interface modules where space and base drive current must be minimized. IC Role / Device Role / Timing Role: Single-transistor replacement for BCX38/BCX56-based Darlington pairs, providing equivalent current gain with reduced component count. Use Value: hFE = 300 at IC = –2 A eliminates need for second-stage transistor, cutting board area and propagation delay. | Use Scenario: Enabling/disabling 3–5 A loads (e.g., GPS receivers, LED arrays) in handheld medical and test equipment using alkaline or Li-ion batteries. IC Role / Device Role / Timing Role: High-efficiency PNP load switch placed between battery and load, controlled by microcontroller GPIO. Use Value: Rth(j–amb) = 116 °C/W allows 1.5 W dissipation at 25°C ambient - sufficient for 3 A × 0.25 V = 0.75 W conduction loss without heatsink. |
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 |
|---|---|---|---|
| MJD2955G | VCEO = –60 V, IC = –10 A, TO-220 package, higher Ptot = 115 W but larger footprint and slower toff (1.5 µs) | Suitable for higher-voltage industrial motor controls; not drop-in due to package and thermal interface mismatch | Select when >–15 V blocking or >3 A continuous current is required; avoid if PCB space or switching speed is constrained. |
| ZTX753 | VCEO = –60 V, hFE = 100 @ IC = –1 A, TO-92, lower gain and higher VCE(sat) (–0.5 V typ.) | General-purpose replacement where gain and saturation voltage are less critical | Choose only for cost-sensitive, low-speed applications; not recommended for flash converters or motor drivers demanding low loss. |
Compared with MJD2955G and ZTX753, ZTX788BSTOB uniquely balances TO-92 mountability, 300 hFE at 2 A, and sub-0.3 V saturation - making it optimal for space-constrained, battery-operated systems needing efficient medium-current PNP switching without thermal derating.
Availability
ZTX788BSTOB is available at Aetrix Electronics and suitable for motor drivers, flash gun converters, Darlington replacements, and battery-powered load switches requiring stable component supply across production lifecycles.
Supply support for ZTX788BSTOB 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 power management, signal integrity, and protection applications.
ZTX788BSTOB belongs to the ZTX series of high-gain, medium-power BJTs engineered for efficient switching and amplification in portable, automotive, and industrial power stages - emphasizing low VCE(sat), wide SOA, and rugged thermal performance.
FAQ
What is the maximum continuous collector current for ZTX788BSTOB?
The maximum continuous collector current is –3 A at Tamb = 25°C with proper PCB copper area (≥1 in²). Above 25°C, power dissipation must be derated at 5.7 mW/°C per the datasheet's thermal curve. At 70°C ambient, usable IC drops to approximately –2.1 A to maintain safe junction temperature.
Is ZTX788BSTOB pin-compatible with standard TO-92 transistors?
Yes - ZTX788BSTOB uses the E-Line TO-92-compatible outline with emitter-base-collector (E-B-C) lead arrangement matching industry-standard PNP TO-92 devices like BC557 and ZTX753. Mechanical fit and solder pad layout are identical, enabling direct PCB replacement where electrical specs align.
Does ZTX788BSTOB require a heatsink in typical applications?
No heatsink is required for continuous operation at ≤1.5 W dissipation with ≥1 in² PCB copper. At IC = –2 A and VCE(sat) = –0.25 V, power loss is 0.5 W - well within the 1.5 W practical limit. Heatsinking becomes necessary only in sealed enclosures above 60°C ambient or for pulsed loads exceeding 3 A peak.
Can ZTX788BSTOB be used in linear amplifier configurations?
Yes - its hFE stability across IC = –10 mA to –6 A and fT = 100 MHz support Class-A and AB audio preamplifier stages and precision current sources. However, linearity must be verified per application; the device is optimized for switching, so harmonic distortion may exceed that of purpose-built RF or audio transistors.
ZTX788BSTOB 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):
- 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)
ZTX788BSTOB FAQ
1.How can I place an order for ZTX788BSTOB through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX788BSTOB 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 ZTX788BSTOB reliable?
The price and inventory of ZTX788BSTOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX788BSTOB is usually 5 days.
3.What payment methods are accepted for ZTX788BSTOB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX788BSTOB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX788BSTOB?
ZTX788BSTOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX788BSTOB 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 ZTX788BSTOB?
For technical support, including ZTX788BSTOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX788BSTOB requirements.
6.How does Aetrix verify that ZTX788BSTOB is sourced from the original manufacturer or authorized distributors?
All ZTX788BSTOB 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 ZTX788BSTOB meets industry standards.
7.What is the process for return or replacement of ZTX788BSTOB?
All ZTX788BSTOB units undergo pre-shipment inspection (PSI). If there is an issue with ZTX788BSTOB, 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 ZTX788BSTOB part is unused and in its original packaging.
Return procedure for ZTX788BSTOB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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