2SD2143TL.pdf


The 2SD2143TL is optimized for compact, low-power systems requiring stable hFE performance and reliable switching. Below are the essential technical considerations engineers typically evaluate when adopting this device.
The device is a standard NPN BJT operating in either switching or linear mode. It amplifies current from base to collector or acts as a low-loss switch in digital and analog circuits. Its small package helps minimize parasitics and supports high-density PCB layouts.
Designed for low-voltage circuits, the transistor provides a collector current rating around 500 mA and stable gain performance. Its low saturation voltage improves efficiency and reduces heat in switching applications.
The 2SD2143TL features fast switching characteristics, making it suitable for high-speed driver logic, signal modulation and load switching applications requiring minimal propagation delay.
Rohm's transistor process ensures stable operation across temperature and voltage conditions. The SOT-23 package provides adequate thermal dissipation for low-power stages, supporting reliable long-term operation.
The SOT-23 footprint enables compact placement and automated assembly. Its low profile is ideal for portable electronics and high-density boards, reducing overall BOM and PCB size.
Suitable for a wide range of low-power applications, from signal amplification to MOSFET gate driving, relay drive buffering, motor control pre-stages and general digital switching.
| Transistor Type | NPN Bipolar Junction Transistor (BJT) |
|---|---|
| Package | SOT-23 (Surface Mount) |
| Collector Current (Ic) | Approx. 500 mA (typical rating for this family) |
| Collector–Emitter Voltage (Vceo) | Low-voltage operation suitable for consumer & general electronics |
| Gain (hFE) | Stable DC current gain for small-signal amplification |
| Saturation Voltage (Vce(sat)) | Low Vce(sat) improves efficiency in switching applications |
| Switching Speed | Fast switching optimized for digital & driver circuits |
| Mounting | Surface-mount, automated reflow compatible |
| Manufacturer | Rohm Semiconductor |
The 2SD2143TL uses a standard SOT-23 BJT pin configuration:
1 – Base: Controls transistor conduction 2 – Emitter: Current output path 3 – Collector: Main load current path
2SD2143TL is housed in a SOT-23 package, offering an excellent balance of PCB space efficiency, low parasitics and reliable automated assembly. Engineers should follow Rohm's recommended land pattern and solder profile to ensure sound joints and consistent electrical performance.

Used in audio circuits, small-signal amplifiers and power switches in portable electronics.
Suitable for MOSFET gate drive buffering, LED driving and relay pre-drive circuits.
Provides efficient on/off control for digital logic loads and low-power mechanical or inductive loads.
Used in low-power analog stages requiring stable gain and minimal distortion.
Comparable NPN transistors include general-purpose devices such as 2N3904, MMBT2222, or other Rohm small-signal NPNs depending on required Ic, hFE and Vceo ratings. Selection should consider gain classification, power dissipation and package compatibility.
Rohm Semiconductor is a global Japanese manufacturer known for reliable transistor processes, strict quality control and excellent long-term product availability for industrial and consumer markets.
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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of 2SD2143TL.
(3)The PartNo is unused and only in the original unpacked packaging.
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(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
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| Image | ![]() |
| Part Number | 2SD2143TL |
| Manufacturer | ROHM Semiconductor |
| Series | - |
| Package/Case | TO-252-3, DPAK (2 Leads + Tab), SC-63 |
| Packaging | Tape & Reel (TR) |
| Product Status | Not For New Designs |
| Transistor Type | NPN - Darlington |
| Current - Collector (Ic) (Max) | 2 A |
| Voltage - Collector Emitter Breakdown (Max) | 60 V |
| Vce Saturation (Max) @ Ib, Ic | 1.5V @ 1mA, 1A |
| Current - Collector Cutoff (Max) | 1µA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 1000 @ 1A, 2V |
| Power - Max | 10 W |
| Frequency - Transition | - |
| Operating Temperature | 150°C (TJ) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Supplier Device Package | CPT3 |