2SC4081UBTLR ROHM Semiconductor Integrated Circuit (Other) In Stock
ROHM 2SC4081UBTLR is a single NPN bipolar junction transistor in ultra-compact SC-89 (SOT-363) SMD package rated at 50 V collector-emitter voltage and 150 mA collector current with minimum hFE of 180. Features low saturation voltage suitable for high-speed switching and amplification. From $0.08 in stock with worldwide shipping.
- Manufacturer
- ROHM Semiconductor
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- 2SC4081UBTLR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 50 V collector-emitter breakdown voltage (VCEO) and 150 mA (0.15 A) collector current for versatile small-signal NPN switching
- Minimum DC current gain (hFE) of 180 enabling efficient base drive in low-power amplifier and digital logic switching circuits
- Ultra-compact SOT-363 (SC-89) small-outline package saving board space in portable and space-constrained designs
- Tape-and-reel (LR) packaging for automated high-volume SMT assembly with reflow soldering
Applications
The 2SC4081UBTLR is suited for small-signal amplification and digital switching in portable consumer electronics, IoT sensor nodes, and wearable devices where space and power efficiency are critical. Its 50 V VCEO and 150 mA collector current rating cover relay driver, LED switching, and signal buffering applications operating from 3.3 V to 5 V rails. The ultra-compact SOT-363 footprint enables dense component placement on multi-layer PCBs in handheld instruments and mobile communication hardware.
Specifications
| YTEOL | 7 |
| Collector Current-Max (IC) | 0.15A |
| Collector-Emitter Voltage-Max | 50V |
| Configuration | SINGLE |
| DC Current Gain-Min (hFE) | 180 |
| JESD-30 Code | R-PDSO-F3 |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Polarity/Channel Type | NPN |
| Power Dissipation-Max (Abs) | 0.2W |
| Surface Mount | YES |
| Terminal Form | FLAT |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Transistor Application | AMPLIFIER |
| Transistor Element Material | SILICON |
| Transition Frequency-Nom (fT) | 180MHz |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the key voltage and current ratings of the 2SC4081UBTLR for switching circuit design?
The 2SC4081UBTLR is rated at 50 V collector-emitter voltage (VCEO), 150 mA maximum collector current (IC), and 200 mW power dissipation, making it suitable for switching loads such as LEDs, relays, and low-power motor drivers from 3.3 V to 24 V supply rails.
How does the minimum hFE of 180 benefit low-base-drive applications in the 2SC4081UBTLR?
With a minimum DC current gain (hFE) of 180, the 2SC4081UBTLR requires less than 1 mA of base drive to saturate at 100 mA collector current, reducing microcontroller GPIO loading and enabling direct transistor drive from 3.3 V logic outputs without additional buffer stages.
Which compact package does 2SC4081UBTLR use and what PCB footprint does it require?
The 2SC4081UBTLR uses the SOT-363 (SC-89) small-outline 3-pin package measuring approximately 1.6 mm × 1.6 mm, requiring a PCB footprint of three 0.5 mm × 0.7 mm pads at 0.65 mm pitch, ideal for ultra-compact SMT layouts in mobile and wearable electronics.
When should a designer choose 2SC4081UBTLR over a larger SOT-23 NPN transistor for the same 50 V switching function?
When board area is constrained to under 4 mm², the 2SC4081UBTLR's SOT-363 package occupies roughly 2.5 mm² versus 3.5 mm² for SOT-23, while delivering equivalent 50 V, 150 mA switching performance and hFE above 180, making it the preferred choice for high-density wearable and IoT PCB designs.
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