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BC328-25
Diotec Semiconductor
TRANS PNP 25V 0.8A TO92
2412 Pcs New Original In Stock
Bipolar (BJT) Transistor PNP 25 V 800 mA 100MHz 625 mW Through Hole TO-92
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5.0 / 5.0
- (427 Ratings)
BC328-25
Product Overview
12945023
DiGi Electronics Part Number
BC328-25-DGManufacturer
Diotec Semiconductor
BC328-25
Description
TRANS PNP 25V 0.8A TO92Inventory
2412 Pcs New Original In Stock
Bipolar (BJT) Transistor PNP 25 V 800 mA 100MHz 625 mW Through Hole TO-92
Quantity
Minimum 1
Minimum 1
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BC328-25 Technical Specifications
Category
Transistors, Bipolar (BJT), Single Bipolar Transistors
Packaging
Strip
Series
-
Product Status
Active
Transistor Type
PNP
Current - Collector (Ic) (Max)
800 mA
Voltage - Collector Emitter Breakdown (Max)
25 V
Vce Saturation (Max) @ Ib, Ic
700mV @ 50mA, 500mA
Current - Collector Cutoff (Max)
100nA
DC Current Gain (hFE) (Min) @ Ic, Vce
160 @ 100mA, 1V
Power - Max
625 mW
Frequency - Transition
100MHz
Operating Temperature
-55°C ~ 150°C (TJ)
Mounting Type
Through Hole
Package / Case
TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package
TO-92
Datasheet & Documents
HTML Datasheet
BC328-25-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Additional Information
Other Names
2721-BC328-25
Standard Package
30
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
J’ai apprécié leur assistance proactive pour assurer ma satisfaction après mon achat.
Dec 02, 2025
Speedy shipping and tough build quality make DiGi Electronics a reliable choice for professional use.
Dec 02, 2025
I trust DiGi Electronics for products that deliver both durability and affordability.
Dec 02, 2025
I appreciate the affordable pricing that allows me to enhance my gaming experience easily.
Dec 02, 2025
Shipping is consistently rapid, and their customer support is always approachable.
Dec 02, 2025
I am impressed with the durability of the item; it feels sturdy and built to last, giving me confidence in its longevity.
Dec 02, 2025
DiGi Electronics' products have shown exceptional durability, even in harsh environments, which is critical for our application.
Dec 02, 2025
This is my favorite place to buy gadgets—great prices and eco-friendly packaging.
Dec 02, 2025
Their focus on sustainability doesn't compromise affordability—well done.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the BC328-25 in a high-temperature environment near its maximum junction temperature of 150°C?
When designing with the BC328-25 in environments approaching 150°C, thermal derating of the 625 mW maximum power dissipation is critical. Without adequate PCB copper heatsinking or airflow, the transistor may experience thermal runaway, especially under sustained 500mA load conditions. Ensure the DC current gain (hFE), which is specified at 160 @ 100mA, does not degrade significantly at elevated temperatures—verify with bias circuit margin testing. Use thermal vias or thicker copper traces to improve reliability in enclosed or high-ambient-temperature applications.
How does the BC328-25 compare to the BC327-25 when selecting a PNP transistor for a linear regulator circuit, and are they interchangeable?
The BC328-25 and BC327-25 are complementary PNP transistors from similar families but with critical differences. While both have a 25V Vce breakdown and TO-92 package, the BC327-25 is typically specified with higher hFE (e.g., 250 min) and is more commonly used in driver applications. The BC328-25’s lower hFE (160 min @ 100mA) may require higher base drive current in linear regulation, increasing control-stage loading. They are pin-compatible but not functionally interchangeable without recalculating base resistor values and verifying thermal performance under full load.
Can the BC328-25 reliably switch inductive loads like relays without additional protection, and what are the failure modes?
The BC328-25 can switch small inductive loads such as 5V relays drawing under 500mA, but flyback voltage spikes exceeding 25V Vce breakdown risk damaging the transistor. Always use a flyback diode (e.g., 1N4001) across the relay coil to suppress transient voltages. Without protection, cumulative stress from inductive kickback can lead to latent junction degradation or sudden collector-emitter short. Derate the voltage margin by at least 30% in noisy environments for long-term reliability.
What are the saturation voltage trade-offs when driving the BC328-25 at 500mA collector current with only 50mA of base current?
At Ib = 50mA and Ic = 500mA, the BC328-25 has a Vce(sat) of up to 700mV. This implies a forced beta of 10, well below its linear hFE of 160, but necessary for full saturation in switching applications. The 700mV drop results in 350mW of static power dissipation—over 50% of its 625mW rated limit—requiring attention to PCB thermal design. If lower dropout is critical, consider a logic-level MOSFET like IRLZ44N, but the BC328-25 remains viable for intermittent duty cycles under thermal management.
Is the BC328-25 a suitable drop-in replacement for the 2N3906 in high-frequency or high-current applications, and where might it fail?
The BC328-25 is not a direct drop-in replacement for the 2N3906 in all cases. While both are PNP TO-92 transistors, the BC328-25 supports higher collector current (800mA vs. 200mA) and power dissipation (625mW vs. 625mW, but with better thermal characteristics under load), making it superior in driver or switching roles. However, the 2N3906 typically has tighter parameter control and is better suited for precision analog circuits. In high-frequency applications near 100MHz transition frequency, ensure the BC328-25’s gain roll-off doesn’t degrade small-signal performance in amplification stages compared to the 2N3906.
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BC328-25 CAD Models
Diotec Semiconductor BC328-25 PCB symbols & footprints
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