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Nexperia USA Inc. PDTC143TU,115
- Part No.:
- PDTC143TU,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
PDTC143TU,115.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:5,073
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Product details
Overview
PDTC143TU,115 from Nexperia is an NPN resistor-equipped transistor (RET) with integrated 4.7 kΩ base bias resistor (R1), open R2 configuration, 50 V VCEO, 100 mA IO, and SOT323 (SC-70) package - used for compact logic-level switching in space-constrained interface circuits such as microcontroller GPIO drivers and LED load control.
For engineers reviewing the PDTC143TU,115 datasheet, PDTC143TU,115 pinout, PDTC143TU,115 application, or PDTC143TU,115 equivalent, key selection criteria include built-in biasing, thermal resistance (625 K/W), DC current gain (hFE ≥ 200 at IC = 1 mA), VCEsat ≤ 100 mV, and SOT323 footprint compatibility with high-density PCB layouts.
Technical Context
This device integrates a single NPN bipolar junction transistor with a monolithic 4.7 kΩ input resistor (R1) connected between base and emitter, while R2 is internally open - eliminating external bias components and enabling direct connection to CMOS/TTL logic outputs. It operates as a saturated switch with guaranteed hFE ≥ 200 at low drive currents.
Designed for DC-coupled digital switching, it supports VCEO = 50 V and IO = 100 mA under ambient conditions up to +150 °C, with thermal resistance of 625 K/W in free air - making it suitable for low-power signal routing where board area and assembly cost are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - maximum collector-emitter voltage before breakdown; enables use in 24 V industrial logic interfaces. |
| IO | 100 mA - continuous DC output current capability; sufficient for driving LEDs, small relays, or logic inputs. |
| R1 | 4.7 kΩ - fixed internal base bias resistor; eliminates need for external pull-up/pull-down, reducing BOM count by one component. |
| hFE | ≥200 at VCE = 5 V, IC = 1 mA - ensures reliable saturation with low base drive (e.g., 3.3 V MCU GPIO). |
| VCEsat | ≤100 mV at IC = 5 mA, IB = 0.25 mA - minimizes power loss and self-heating during on-state operation. |
| Ptot | 200 mW at Tamb ≤ 25 °C - defines maximum dissipation in SOT323 package; requires thermal derating above ambient. |
| Rth(j-a) | 625 K/W - junction-to-ambient thermal resistance; informs heatsinking requirements for sustained 100 mA loads. |
Pinout & Package
SOT323 (SC-70) is a 3-lead surface-mount plastic package measuring 2.2 × 1.35 × 0.95 mm, optimized for high-density PCB assembly and reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Input node connected to internal R1 | Accepts logic-level drive; R1 pulls base toward emitter, enabling direct TTL/CMOS interfacing without external resistor. |
| 2 (Emitter) | Reference terminal for bias network | Connected to R1's lower end and transistor emitter; serves as common return for input and output paths. |
| 3 (Collector) | Switched output terminal | Carries load current when saturated; placed opposite emitter to support low-side switching configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 4.7 kΩ base resistor | Reduces external component count by one resistor per switch channel, lowering assembly cost and layout complexity. |
| Guaranteed hFE ≥ 200 | Ensures consistent saturation with standard 3.3 V or 5 V logic drive, eliminating need for gain margin calculations. |
| VCEsat ≤ 100 mV | Minimizes conduction loss in battery-powered or thermally constrained applications, improving efficiency and reliability. |
| SOT323 footprint | Enables placement in <2.5 mm² board area - ideal for wearables, sensor nodes, and miniaturized IoT edge devices. |
Applications
| Microcontroller GPIO Driver | LED Indicator Control |
|---|---|
Use Scenario: Driving discrete LEDs from 3.3 V ARM Cortex-M0+ GPIO pins with limited sink/source current. IC Role / Device Role / Timing Role: Low-side switch that translates logic-high to LED-on state using emitter-grounded configuration. Use Value: Eliminates need for external base resistor, saving 0.5 mm² PCB area per channel and reducing pick-and-place steps. | Use Scenario: Controlling status indicators in portable medical sensors with strict size and power constraints. IC Role / Device Role / Timing Role: Constant-current switch regulating LED brightness via PWM duty cycle at collector node. Use Value: 100 mV VCEsat ensures >95% of supply voltage reaches LED anode, maximizing luminous efficacy at low drive levels. |
| Logic-Level Signal Inverter | Small-Signal Relay Interface |
Use Scenario: Converting active-high enable signals to active-low inputs for legacy peripherals in industrial gateways. IC Role / Device Role / Timing Role: Digital inverter stage with rail-to-rail input compatibility and fast turn-on/turn-off transitions. Use Value: Integrated R1 ensures clean logic thresholds across temperature, avoiding marginal switching near VIL/VIH boundaries. | Use Scenario: Activating 5 V coil relays from 3.3 V microcontroller outputs in building automation controllers. IC Role / Device Role / Timing Role: Current-amplifying interface that delivers 100 mA collector current with <0.25 mA base drive. Use Value: Guaranteed hFE ≥ 200 allows full relay actuation even at elevated junction temperatures up to 125 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN resistor-equipped transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PDTC143TK,115 | SOT346 (SC-59) package; larger footprint (3.0 × 1.7 mm), higher Ptot (250 mW), same R1/hFE/VCEO. | Better thermal performance but occupies ~3× more board area; suited for less dense designs requiring higher power margin. | Select when thermal derating above 70 °C ambient is required and PCB space permits larger package. |
| PDTC143TT,115 | SOT23 package; identical electrical specs but different pinout (1=Base, 2=Collector, 3=Emitter) and 500 K/W Rth(j-a). | Requires layout revision due to swapped collector/emitter pins; not drop-in compatible despite same marking code family. | Choose only if existing SOT23 footprints exist and thermal design accommodates higher junction rise. |
Compared with PDTC143TK,115 and PDTC143TT,115, the PDTC143TU,115 offers the smallest footprint (SOT323) and highest thermal resistance - prioritizing miniaturization over power handling, making it optimal for ultra-compact, low-duty-cycle switching where board real estate is premium.
Availability
PDTC143TU,115 is available at Aetrix Electronics and suitable for microcontroller GPIO drivers, LED indicator control, logic-level signal inversion, and small-signal relay interfaces requiring stable component supply and long-term production continuity.
Supply support for PDTC143TU,115 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global leader in high-volume production of discrete semiconductors, logic ICs, and PowerMOS devices - spun off from NXP in 2017 and headquartered in Nijmegen, Netherlands.
The PDTC143T series belongs to Nexperia's resistor-equipped transistor (RET) product line, engineered specifically for cost-sensitive, space-constrained digital switching applications in consumer, computing, and industrial electronics.
FAQ
What is the pin configuration of PDTC143TU,115?
PDTC143TU,115 uses SOT323 package with pin 1 = Base, pin 2 = Emitter, pin 3 = Collector. This matches the standard "top view" orientation shown in Nexperia's SOT323 outline drawing (document 2004 Aug 06, page 11). The base connects internally to the 4.7 kΩ resistor, and the emitter serves as the reference node for the bias network.
Can PDTC143TU,115 replace a standard NPN transistor like BC847?
Yes, but only when external base biasing is removed - PDTC143TU,115 integrates R1 and omits R2, so it replaces BC847 plus its base resistor in simple switch applications. It is not a direct substitute in linear amplifier or analog gain stages due to fixed bias topology and lack of independent base access.
What is the maximum operating temperature for continuous 100 mA load?
At 100 mA IC, VCEsat ≤ 100 mV yields ~10 mW dissipation. With Rth(j-a) = 625 K/W, junction rise is ~6.25 °C above ambient. Thus, continuous 100 mA operation is safe up to Tamb = 143.75 °C (150 °C − 6.25 °C), well within the rated Tj limit of 150 °C.
Is reflow soldering required for PDTC143TU,115?
Yes - Nexperia specifies reflow soldering as the only recommended method for PDTC143TU,115 (SOT323). Wave or hand soldering is not advised due to thermal stress risks on the ultra-small package. Reflow profile must comply with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for SOT323.
PDTC143TU,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 4.7 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 100mV @ 250µA, 5mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 200 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
PDTC143TU,115 FAQ
1.How can I place an order for PDTC143TU,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC143TU,115 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PDTC143TU,115 reliable?
The price and inventory of PDTC143TU,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC143TU,115 is usually 5 days.
3.What payment methods are accepted for PDTC143TU,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC143TU,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC143TU,115?
PDTC143TU,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC143TU,115 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PDTC143TU,115?
For technical support, including PDTC143TU,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC143TU,115 requirements.
6.How does Aetrix verify that PDTC143TU,115 is sourced from the original manufacturer or authorized distributors?
All PDTC143TU,115 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PDTC143TU,115 meets industry standards.
7.What is the process for return or replacement of PDTC143TU,115?
All PDTC143TU,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC143TU,115, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PDTC143TU,115 part is unused and in its original packaging.
Return procedure for PDTC143TU,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTC143TU,115 Tags
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