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NXP Semiconductors PDTC143EK,115
- Part No.:
- PDTC143EK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTC143EK,115.pdf
- Description:
- TRANS PREBIAS NPN 50V 0.1A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:6,441
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Product details
Overview
PDTC143EK,115 from NXP Semiconductors is an NPN resistor-equipped transistor with integrated 4.7 kΩ base bias resistors (R1 and R2), designed for general-purpose switching in digital interface circuits. It supports DC output current up to 100 mA, withstands 50 V collector-emitter voltage, and is housed in the SOT346 (SC-59) surface-mount package.
For engineers reviewing the PDTC143EK,115 datasheet, PDTC143EK,115 pinout, PDTC143EK,115 application, or PDTC143EK,115 equivalent, key selection criteria include its built-in bias network simplifying drive circuitry, guaranteed VCE(sat) ≤ 150 mV at IC = 10 mA/IB = 0.5 mA, thermal resistance of 500 K/W, and compatibility with reflow-only soldering per JEDEC standards.
Technical Context
The PDTC143EK,115 integrates two precision 4.7 kΩ resistors (R1 between base and input, R2 between base and emitter) to form a monolithic digital transistor structure. Its internal configuration enables direct TTL/CMOS logic-level interfacing without external bias components.
It operates as a saturated switch with hFE ≥ 30 at VCE = 5 V and IC = 10 mA, and features low leakage: ICEO ≤ 1 μA at VCE = 30 V and IB = 0 A, supporting reliable off-state isolation in logic-driven loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V maximum - ensures safe operation in 24 V industrial control and 3.3/5 V logic-buffered systems |
| IO (DC) | 100 mA - supports driving LEDs, small relays, and MOSFET gates without external amplification |
| R1 / R2 | 4.7 kΩ each - provides fixed current-limited base drive for predictable saturation and fast turn-off |
| VCE(sat) | ≤150 mV at IC=10 mA/IB=0.5 mA - minimizes power loss and self-heating in high-duty-cycle switching |
| Ptot | 250 mW at Tamb ≤ 25 °C - defines thermal derating envelope for SOT346 mounting on standard FR4 PCBs |
| hFE | ≥30 at VCE=5 V, IC=10 mA - guarantees sufficient current gain for reliable logic-level switching margin |
Pinout & Package
PDTC143EK,115 is packaged in SOT346 (SC-59), a plastic surface-mounted package with 3 leads, footprint dimensions 1.3 mm × 1.0 mm × 0.95 mm, and reflow-soldering compatible construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Input node connected internally to R1 (4.7 kΩ) and R2 (4.7 kΩ); accepts logic-level signals directly |
| 2 | Emitter | Common return path for load current; tied to ground or low-side reference in typical switch configurations |
| 3 | Collector | Switched output terminal; connects to load (e.g., LED anode, relay coil) and supply rail via pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Built-in dual bias resistors | Eliminates need for two external resistors, reducing BOM count and PCB area in logic interface stages |
| Guaranteed VCE(sat) ≤ 150 mV | Ensures minimal conduction loss and stable low-voltage drop across collector-emitter during saturation |
| Reflow-only soldering compliance | Validated for lead-free reflow profiles only-prevents thermal damage during assembly |
| Low ICEO ≤ 1 μA | Provides robust off-state blocking for battery-powered or low-power standby applications |
Applications
| LED Driver Circuit | Digital Logic Level Shifter |
|---|---|
Use Scenario: Driving multiple indicator LEDs from microcontroller GPIO pins with 3.3 V or 5 V logic levels. IC Role / Device Role / Timing Role: Low-side saturated switch controlling LED current path to ground. Use Value: Built-in 4.7 kΩ bias resistors enable direct connection to MCU outputs without discrete base resistors, reducing component count by two per channel. | Use Scenario: Translating 3.3 V CMOS logic signals to drive 5 V TTL-compatible inputs in mixed-voltage systems. IC Role / Device Role / Timing Role: Voltage-level translating switch with fast turn-on/turn-off due to optimized R1/R2 ratio. Use Value: Guaranteed VCE(sat) ≤ 150 mV ensures output low level stays below 0.2 V, satisfying TTL input threshold requirements reliably. |
| Microcontroller Peripheral Interface | Small-Signal Relay Driver |
Use Scenario: Enabling/disabling sensors, buzzers, or optocouplers using MCU-controlled on/off signals. IC Role / Device Role / Timing Role: General-purpose digital switch isolating MCU I/O from peripheral power domains. Use Value: 100 mA DC output rating supports typical sensor/buzzer loads while hFE ≥ 30 ensures full saturation even with marginal drive strength. | Use Scenario: Driving 5 V or 12 V coil relays in industrial control panels or home automation modules. IC Role / Device Role / Timing Role: High-gain saturated switch providing galvanic isolation between logic and relay coil. Use Value: 50 V VCEO rating accommodates relay back-EMF spikes; low VCE(sat) reduces coil power dissipation and contact arcing risk. |
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 |
|---|---|---|---|
| PDTC143ET,115 | SOT23 package (smaller footprint, higher thermal resistance: 500 K/W vs. 500 K/W), identical electrical specs | Preferred for ultra-compact layouts where board space is constrained more than thermal performance | Select when PCB real estate is critical and ambient temperature remains moderate (<60 °C) |
| PDTC143EU,115 | SOT323 package (1.3 × 0.95 mm), lower Ptot (200 mW), same R1/R2 and VCEO | Suitable for low-power, low-duty-cycle signal routing-not recommended for continuous 100 mA loads | Choose for portable devices with strict size constraints and sub-50 mA average load current |
Compared with PDTC143ET,115 and PDTC143EU,115, the PDTC143EK,115 offers identical electrical performance in the SOT346 package-a balanced compromise of thermal capability (250 mW), board area (1.3 × 1.0 mm), and manufacturability for mainstream surface-mount assembly lines.
Availability
PDTC143EK,115 is available at Aetrix Electronics and suitable for LED driver circuits, digital logic level shifters, microcontroller peripheral interfaces, and small-signal relay drivers requiring stable component supply and consistent parametric performance across production batches.
Supply support for PDTC143EK,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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The PDTC143EK,115 belongs to NXP's PDTC143E series of resistor-equipped transistors, engineered to simplify digital switching designs by integrating precision bias networks into compact surface-mount packages.
FAQ
What is the maximum collector-emitter voltage rating for PDTC143EK,115?
The PDTC143EK,115 has a maximum collector-emitter voltage (VCEO) rating of 50 V, verified under open-base conditions per IEC 60134 limiting values. This allows safe use in 24 V industrial systems and 5 V logic-buffered applications where transient spikes remain within specification limits. The PDTC143EK,115 maintains this rating across its full operating ambient temperature range of −65 °C to +150 °C.
Does PDTC143EK,115 require external base resistors for TTL or CMOS logic drive?
No, the PDTC143EK,115 does not require external base resistors because it integrates R1 = 4.7 kΩ and R2 = 4.7 kΩ internally. These resistors enable direct connection to 3.3 V or 5 V logic outputs while ensuring proper base current limiting and stable saturation. This eliminates two passive components per switch channel and is confirmed in the "Features" and "Quick Reference Data" sections of the official NXP datasheet for PDTC143EK,115.
What is the thermal resistance (Rth(j-a)) of PDTC143EK,115 in free air?
The thermal resistance from junction to ambient (Rth(j-a)) for PDTC143EK,115 is 500 K/W under free-air conditions, as specified in the "Thermal Characteristics" table of the NXP datasheet. This value applies to the SOT346 package mounted on standard FR4 PCBs and defines the temperature rise per watt of dissipated power-critical for calculating maximum allowable continuous current at elevated ambient temperatures.
Can PDTC143EK,115 be used in linear amplifier applications?
The PDTC143EK,115 is characterized and optimized for switching operation-not linear amplification. Its datasheet specifies parameters like VCE(sat), IO, and hFE only under saturated or cutoff conditions. No small-signal AC parameters (e.g., fT, Cob, noise figure) are provided, and the built-in resistors limit bias flexibility required for analog gain stages. Therefore, PDTC143EK,115 should not be used in linear amplifier roles.
What is the recommended soldering method for PDTC143EK,115?
The only recommended soldering method for PDTC143EK,115 is reflow soldering, as explicitly stated in the "Limiting Values" section of the NXP datasheet. Hand soldering or wave soldering is not advised due to thermal stress risks on the SOT346 package and internal resistor elements. Reflow profiles must comply with JEDEC J-STD-020 standards for moisture sensitivity level (MSL) and peak temperature limits appropriate for the PDTC143EK,115's construction.
PDTC143EK,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 4.7 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 150mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 1µA
- Frequency - Transition:
- -
- Power - Max:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMT3; MPAK
PDTC143EK,115 FAQ
1.How can I place an order for PDTC143EK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC143EK,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 PDTC143EK,115 reliable?
The price and inventory of PDTC143EK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC143EK,115 is usually 5 days.
3.What payment methods are accepted for PDTC143EK,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC143EK,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC143EK,115?
PDTC143EK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC143EK,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 PDTC143EK,115?
For technical support, including PDTC143EK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC143EK,115 requirements.
6.How does Aetrix verify that PDTC143EK,115 is sourced from the original manufacturer or authorized distributors?
All PDTC143EK,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 PDTC143EK,115 meets industry standards.
7.What is the process for return or replacement of PDTC143EK,115?
All PDTC143EK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC143EK,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 PDTC143EK,115 part is unused and in its original packaging.
Return procedure for PDTC143EK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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