BC337-25 A1 Taiwan Semiconductor Transistor BJT NPN (Other) In Stock
Taiwan Semiconductor BC337-25 A1 is a general-purpose NPN bipolar transistor rated at 800 mA collector current and 45 V breakdown voltage in a 3-pin TO-92 through-hole package. Suitable for switching and amplification circuits. Available from stock with worldwide shipping.
- Manufacturer
- Taiwan Semiconductor
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- BC337-25 A1 Datasheet PDF
- Category
- Transistor BJT NPN
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 800 mA collector current (IC) and 45 V collector-emitter breakdown voltage (VCEO) enable reliable switching of moderate loads in general-purpose circuits
- NPN TO-92 package with industry-standard pinout simplifies direct replacement of common small-signal transistors in switching and amplifier designs
- hFE gain group 25 selection ensures tighter DC current gain matching for circuits requiring predictable amplification without gain binning uncertainty
Applications
The BC337-25 A1 is used in general-purpose switching and amplification circuits such as relay drivers, LED drivers, and audio preamplifier stages requiring up to 800 mA of collector current at supply voltages up to 45 V. Its TO-92 package and NPN configuration make it a straightforward replacement in consumer electronics, educational kits, and prototyping boards. The gain selection group (hFE 25) provides more predictable current gain for designs that depend on consistent transistor beta across production units.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the maximum collector current and voltage ratings of the BC337-25 A1?
The BC337-25 A1 is rated for a maximum collector current (IC) of 800 mA and a collector-emitter breakdown voltage (VCEO) of 45 V. These ratings make it suitable for switching loads such as relays, small motors, and LED arrays in circuits powered by supplies up to 45 V.
How does the gain group designation affect selection of BC337-25 A1 for amplifier circuits?
The '25' suffix indicates the transistor is binned to a specific DC current gain (hFE) range, typically around 100 to 250 for this group. This tighter gain selection is useful in audio amplifier and signal-conditioning circuits where predictable amplification is needed, reducing variation compared to using ungrouped general-purpose NPN transistors in the TO-92 package.
In what switching applications does the TO-92 packaged BC337-25 A1 outperform surface-mount alternatives?
The TO-92 through-hole package allows hand soldering and easy replacement in prototyping boards, educational kits, and repair applications where SMT rework tools are unavailable. For circuits switching up to 800 mA at 45 V, the TO-92 also provides slightly better thermal contact to heatsink clips compared to SOT-23 packages, extending safe operating time under continuous load conditions.
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