BCR 503 Infineon Transistor BJT NPN (SOT23 (3-Pin)) In Stock
The BCR 503 is an NPN digital transistor from Infineon in a compact 3-pin SOT-23 package, featuring built-in 2.2 kOhm base resistors with a resistor ratio of 1 for direct logic-level switching. Rated for 500 mA collector current and 50 V breakdown voltage, it requires no external bias resistors. Available from stock worldwide with fast shipping.
- Manufacturer
- Infineon
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- BCR 503 Datasheet PDF
- Category
- Transistor BJT NPN
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of BCR 503?
- Built-in 2.2 kOhm base bias resistor network with ratio 1:1 eliminates external components for simplified circuit design
- Rated for 500 mA collector current and 50 V VCEO for reliable low-to-medium power switching
- Ultra-compact 3-pin SOT-23 package minimizes PCB footprint for space-constrained consumer and portable electronics
- Direct logic-level interface allows GPIO-driven switching from 3.3 V or 5 V microcontrollers without additional resistors
What is BCR 503 used for?
The BCR 503 is well suited for logic-level switching, LED driving, and signal conditioning in consumer electronics, portable devices, and industrial control circuits. Its integrated 2.2 kOhm base resistors simplify PCB layout by eliminating external bias components, making it ideal for high-volume space-constrained designs. The 50 V and 500 mA ratings also suit small relay driving and low-side load switching in embedded systems.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for BCR 503?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the integrated bias network simplify a BCR 503 switching stage?
BCR 503 integrates 2.2 kOhm base resistors, allowing direct logic-level drive without separate bias components while retaining the compact 3-pin SOT-23 transistor implementation.
Which load limits should designers review for BCR 503?
The fetched context lists 500 mA collector current and 50 V breakdown capability; designers must keep the actual load, dissipation, and switching transients within datasheet limits.
What should sourcing verify when qualifying BCR 503 for production?
Procurement should confirm the exact 3-pin SOT-23 device, Infineon traceability, tape-and-reel condition, and the documented 2.2 kOhm integrated resistor network before AVL release.
Related Guides
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
STM32H753VIT6 High-Performance MCU Design Guide
Practical STM32H753VIT6 design guidance for power, clocks, memory, DMA, PCB layout, bring-up, and production recovery.
Aug 3, 2026
STM32H753ZIT6 Selection Guide for High-Performance Embedded Systems
Select the STM32H753ZIT6 by evaluating compute, memory, LQFP144 pinout, power, interfaces, security, and sourcing requirements.
Aug 3, 2026
Why Buy from FindMyChip
About Infineon
Infineon is a leading electronic component manufacturer. FindMyChip sources Infineon 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
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
FMMT618TA
Diodes Inc.
Transistor BJT NPN