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
What are the key features of BC337-25 A1?
- 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
What is BC337-25 A1 used for?
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) |
Where can I find the BC337-25 A1 datasheet?
BC337-25 A1 Datasheet DownloadOfficial datasheet from Taiwan Semiconductor
What are equivalent replacements for BC337-25 A1?
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.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Taiwan Semiconductor
Taiwan Semiconductor is a leading electronic component manufacturer. FindMyChip sources Taiwan Semiconductor ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
2SCR554P5T100
ROHM Semiconductor
Transistor BJT NPN
2SCR293P5T100
ROHM Semiconductor
Transistor BJT NPN
CMNT3904E TR
Central Semiconductor
Transistor BJT NPN
2N5551
ON Semiconductor
Transistor BJT NPN
RN1316,LF
Toshiba
Transistor BJT NPN
BC547BTF
ON Semiconductor
Transistor BJT NPN
JANTX2N2222A
Microsemi Corporation
Transistor BJT NPN
MPSA13
ON Semiconductor
Transistor BJT NPN
2SC1815GRTE2FT
Toshiba
Transistor BJT NPN
2SC1815
Central Semiconductor
Transistor BJT NPN
MMBT2222A-TP
Micro Commercial Components (MCC)
Transistor BJT NPN
BFP540H6327XTSA1
Infineon
Transistor BJT NPN
2N3906-AP
Micro Commercial Components (MCC)
Transistor BJT NPN
SMUN5233T1G
ON Semiconductor
Transistor BJT NPN
2N2905A
Microsemi Corporation
Transistor BJT NPN
2SCR346PT100P
ROHM Semiconductor
Transistor BJT NPN
SS8050-G
Comchip Technology
Transistor BJT NPN
RN1410(TE85L,F)
Toshiba
Transistor BJT NPN
RN1405(TE85L,F)
Toshiba
Transistor BJT NPN
RN1115MFV(TPL3)
Toshiba
Transistor BJT NPN
2SC4177-A
Renesas Electronics
Transistor BJT NPN
2SC2335-AZ
Renesas Electronics
Transistor BJT NPN
2SC2334-AZ
Renesas Electronics
Transistor BJT NPN
FZT692BTA
Diodes Inc.
Transistor BJT NPN