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onsemi BD788G
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- Part No.:
- BD788G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-225AA, TO-126-3
- Datasheet:
-
BD788G.pdf
- Description:
- TRANS PNP 60V 4A TO-126
- Quantity:
- Payment:
- Shipping:
Inventory:9,378
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Product details
Overview
BD788G from onsemi is a complementary PNP silicon power transistor in TO-225 package, rated for 60 VCEO, 4.0 A continuous collector current, and 15 W total power dissipation at TC = 25°C. It delivers hFE ≥ 20 at IC = 2.0 A and VCE = 3.0 V, with VCE(sat) ≤ 0.8 V under same conditions, and is specified for low-power audio amplifier stages and low-current, high-speed switching circuits.
For engineers reviewing the BD788G datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, TO-225 mechanical outline with emitter-base-collector terminal assignment, safe operating area (SOA) limits up to 150°C junction temperature, and complementary pairing with BD787G for push-pull output stages.
Technical Context
The BD788G operates as a medium-power PNP bipolar junction transistor optimized for linear amplification and switching in discrete analog circuits. Its design emphasizes low VCE(sat) (≤2.5 V max at IC = 4.0 A), high fT of 50 MHz, and robust thermal resistance (RJC = 8.34°C/W), enabling stable performance in thermally constrained PCB layouts.
It features a maximum VCBO of 80 V and VEBO of 6.0 V, supporting operation in circuits requiring moderate voltage headroom and base-emitter reverse bias tolerance. The device's Cob = 70 pF at VCB = 10 V enables predictable high-frequency response in tuned or broadband amplifier designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum collector-emitter voltage before breakdown under open-base conditions; defines safe DC rail limit in amplifier or switch applications. |
| IC (continuous) | 4.0 A - Continuous collector current rating at TC = 25°C; determines maximum steady-state load drive capability without derating. |
| PD | 15 W - Total power dissipation at TC = 25°C; sets thermal design baseline for heatsink sizing and ambient temperature margin. |
| hFE @ IC=2.0 A | ≥20 - Minimum DC current gain at 2 A collector current and 3 V VCE; ensures reliable base drive sizing for saturated switching. |
| fT | 50 MHz - Current-gain bandwidth product at IC = 100 mA, VCE = 10 V; supports stable small-signal amplification up to mid-VHF range. |
| Cob | 70 pF - Output capacitance at VCB = 10 V; directly impacts switching speed and RF stage impedance matching. |
Pinout & Package
BD788G is housed in a TO-225 plastic package (Case 77-09, Style 1) with three leads and an electrically isolated backside tab. Pin 1 is Emitter, Pins 2 and 4 are Collector (internally connected), and Pin 3 is Base. The package supports through-hole mounting and direct heatsinking via the metal tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Emitter | Main current exit path for PNP operation; connects to most positive supply node in common-emitter configurations. |
| Pins 2 & 4 | Collector | Internally bonded collector terminals; provide dual connection points for high-current routing and thermal spreading. |
| Pin 3 | Base | Control electrode; requires negative bias relative to emitter to turn on; drives current into base to modulate collector current. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | VCE(sat) ≤ 0.8 V at IC = 2.0 A, IB = 200 mA - Minimizes conduction loss and self-heating in switching applications. |
| High fT | 50 MHz - Enables use in audio preamplifiers and RF driver stages where gain-bandwidth trade-offs matter. |
| Pb-Free & RoHS compliant | G-suffix indicates lead-free termination and full compliance with EU RoHS Directive 2011/65/EU - Supports environmentally regulated production. |
| Complementary pairing | Designed as matched PNP counterpart to BD787G (NPN) - Simplifies push-pull, Class-B, and quasi-complementary amplifier layout. |
Applications
| Audio Power Amplifier Stage | DC Motor Driver (Low-Power) |
|---|---|
|
Use Scenario: Final output stage in battery-powered portable audio amplifiers delivering ≤5 W into 8 Ω loads. IC Role / Device Role / Timing Role: PNP emitter-follower or common-emitter switch providing current gain and voltage swing symmetry with BD787G. Use Value: Low VCE(sat) reduces heat generation in compact enclosures; hFE ≥20 ensures stable biasing across temperature. |
Use Scenario: H-bridge half-bridge leg controlling bidirectional 12 V DC motors in robotics or actuator modules. IC Role / Device Role / Timing Role: High-side PNP switch enabling simple logic-level control with NPN base driver. Use Value: 60 V VCEO provides margin against inductive kickback; 4 A IC supports peak motor stall currents. |
| Switch-Mode Power Supply (SMPS) Driver | Linear Voltage Regulator Pass Element |
|
Use Scenario: Gate driver stage for MOSFETs in offline flyback or forward converters operating below 100 kHz. IC Role / Device Role / Timing Role: Fast-switching PNP transistor amplifying PWM signals to drive high-capacitance gate loads. Use Value: 50 MHz fT and 70 pF Cob support clean edge transitions; SOA curves validate pulse reliability at 10% duty cycle. |
Use Scenario: Series pass element in adjustable linear regulators powering sensitive analog circuitry (e.g., ADC references). IC Role / Device Role / Timing Role: PNP-controlled current source regulating output voltage via feedback loop. Use Value: Tight VBE(on) variation (≤1.8 V) and low thermal coefficient ensure stable dropout and line regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD44H11T4G | Higher VCEO (100 V), higher IC (8 A), TO-252 package - surface-mount, no isolated tab. | Preferred for SMT-based SMPS or automotive body control modules requiring higher voltage margin. | Select when board space constraints favor SMT and thermal interface allows direct tab soldering to copper pour. |
| BD139 | Lower VCEO (80 V), lower IC (1.5 A), TO-126 package - smaller footprint, lower power (12.5 W). | Suitable for low-cost audio preamps or signal-level switching where 4 A current is unnecessary. | Choose for cost-sensitive consumer audio where full BD788G current capability is unused and TO-126 fits legacy layouts. |
Compared with BD788G, MJD44H11T4G offers higher voltage/current ratings in an SMT package but lacks the isolated heatsink tab, while BD139 provides adequate gain and speed for lighter loads in a smaller, lower-cost through-hole package - neither is pin-compatible, but both serve overlapping functional roles in discrete power stages.
Availability
BD788G is available at Aetrix Electronics and suitable for low-power audio amplifiers, DC motor drivers, switch-mode power supply drivers, and linear voltage regulator pass elements requiring stable component supply and legacy through-hole compatibility.
Supply support for BD788G 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
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
BD788G belongs to onsemi's complementary plastic silicon power transistor family, engineered for discrete analog signal conditioning and medium-power switching where reliability, thermal performance, and complementary NPN/PNP pairing are essential.
FAQ
What is the maximum junction temperature specification for BD788G?
The BD788G has an operating junction temperature range of –65°C to +150°C, as confirmed in the Absolute Maximum Ratings table. This allows deployment in environments with elevated ambient temperatures, provided thermal design maintains TJ within this limit using the specified RJC = 8.34°C/W and appropriate heatsinking. Derating begins above 25°C case temperature at 0.12 W/°C.
Is BD788G pin-compatible with BD787G?
No - BD788G and BD787G share identical TO-225 package outlines and pin numbering (Emitter–Collector–Base), but their polarities differ: BD788G is PNP and BD787G is NPN. Their pinouts are mechanically identical but electrically complementary, enabling symmetrical placement in push-pull amplifier layouts without PCB redesign.
Does BD788G support high-frequency switching applications?
Yes - BD788G specifies fT = 50 MHz and Cob = 70 pF, making it suitable for high-speed switching up to several megahertz in properly designed circuits. Turn-on and turn-off time data (Figures 3 and 6) confirm nanosecond-scale transitions under defined test conditions, though actual performance depends on base drive strength and load characteristics.
What does the "G" suffix in BD788G indicate?
The "G" suffix in BD788G denotes a Pb-free, RoHS-compliant package per onsemi's standard marking convention. It confirms lead-free terminations and compliance with Directive 2011/65/EU, verified in the datasheet's Features section and Ordering Information table - no additional halogen-free or REACH statements are implied unless explicitly stated.
Why is BD788G marked as discontinued in the datasheet?
The datasheet notes BD788G as discontinued (Note 1), meaning onsemi no longer recommends it for new designs. However, Aetrix Electronics maintains active inventory and supply chain support for legacy systems requiring BD788G, including traceable sourcing and lifecycle coordination - ensuring continued availability for repair, maintenance, and long-lifecycle industrial deployments.
BD788G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-225AA, TO-126-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 4 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 2.5V @ 800mA, 4A
- Current - Collector Cutoff (Max):
- 100µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 40 @ 200mA, 3V
- Power - Max:
- 15 W
- Frequency - Transition:
- 50MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-126
BD788G FAQ
1.How can I place an order for BD788G through Aetrix?
Please submit a Request for Quotation (RFQ) for BD788G 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 BD788G reliable?
The price and inventory of BD788G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BD788G is usually 5 days.
3.What payment methods are accepted for BD788G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BD788G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BD788G?
BD788G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BD788G 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 BD788G?
For technical support, including BD788G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BD788G requirements.
6.How does Aetrix verify that BD788G is sourced from the original manufacturer or authorized distributors?
All BD788G 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 BD788G meets industry standards.
7.What is the process for return or replacement of BD788G?
All BD788G units undergo pre-shipment inspection (PSI). If there is an issue with BD788G, 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 BD788G part is unused and in its original packaging.
Return procedure for BD788G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BD788G Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
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