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NXP Semiconductors PDTC143TK,115
- Part No.:
- PDTC143TK,115
- Manufacturer:
- NXP Semiconductors
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PDTC143TK,115.pdf
- Description:
- TRANS PREBIAS NPN 50V 0.1A SMT3
- Quantity:
- Payment:
- Shipping:
Inventory:5,722
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Product details
Overview
PDTC143TK,115 from Nexperia is an NPN resistor-equipped transistor with integrated 4.7 kΩ base bias resistor (R1), open R2 configuration, 50 V VCEO, 100 mA IC, and SOT346 (SC-59) surface-mount package - used for compact DC switching in interface circuits and logic-level signal translation.
For engineers reviewing the PDTC143TK,115 datasheet, PDTC143TK,115 pinout, PDTC143TK,115 application, or PDTC143TK,115 equivalent, key selection criteria include built-in bias resistor value, collector-emitter saturation voltage at 5 mA/0.25 mA drive, thermal resistance (500 K/W), DC current gain (hFE ≥ 200 @ 1 mA), and SOT346 pin compatibility with legacy TO-236 footprints.
Technical Context
This device integrates a single NPN bipolar junction transistor with a monolithically embedded 4.7 kΩ base resistor (R1) and no second resistor (R2 = open), eliminating external bias components. It operates as a digital switch with guaranteed saturation under 0.25 mA base drive and supports DC output currents up to 100 mA.
The PDTC143TK,115 uses standard SOT346 packaging with defined pinning: Pin 1 = base, Pin 2 = emitter, Pin 3 = collector. Its thermal resistance of 500 K/W (junction-to-ambient, free air) and maximum junction temperature of 150 °C enable reliable operation in space-constrained industrial and consumer PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum safe collector-emitter voltage before breakdown; enables use in 24 V and 36 V control rails. |
| IC (DC) | 100 mA - Continuous collector current rating; supports driving small relays, LEDs, or logic inputs. |
| R1 | 4.7 kΩ ±26% - Integrated base bias resistor; reduces BOM count and eliminates manual resistor placement. |
| VCE(sat) | ≤100 mV @ IC = 5 mA, IB = 0.25 mA - Ensures low conduction loss and minimal self-heating during switching. |
| hFE | ≥200 @ VCE = 5 V, IC = 1 mA - High DC gain allows robust switching even with weak microcontroller GPIO drive. |
| Ptot | 250 mW @ Tamb ≤ 25 °C - Power dissipation limit compatible with standard FR4 PCBs without heatsinking. |
| Rth(j-a) | 500 K/W - Thermal resistance defines temperature rise per watt; critical for ambient derating above 25 °C. |
Pinout & Package
PDTC143TK,115 is housed in a plastic surface-mounted SOT346 (SC-59 / TO-236AA) package measuring 3.1 × 1.7 × 1.3 mm (L × W × H), with gull-wing leads and moisture sensitivity level (MSL) 1 - suitable for standard reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Input node for control signal; internally connected to 4.7 kΩ resistor (R1) - no external pull-up/down required. |
| 2 | Emitter | Common reference terminal; tied to ground or low-side return path in typical low-side switch configurations. |
| 3 | Collector | Output node; connects to load (e.g., LED anode or relay coil); sinks current when base is driven high. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in 4.7 kΩ base resistor | Reduces component count by one passive part and eliminates associated pick-and-place step in SMT assembly. |
| Guaranteed VCE(sat) ≤ 100 mV | Minimizes power loss and heat generation in always-on or PWM-driven loads like status indicators. |
| hFE ≥ 200 at 1 mA | Ensures full saturation with microcontroller GPIO outputs delivering ≤ 0.25 mA base current. |
| SOT346 footprint compatibility | Matches industry-standard TO-236 outline, enabling drop-in replacement for other SOT-23 variants with same pinout. |
| 150 °C max junction temperature | Supports operation in enclosed industrial enclosures or near heat-generating components without thermal shutdown. |
Applications
| LED Driver Circuit | Microcontroller GPIO Interface |
|---|---|
|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V or 5 V MCU outputs in portable instrumentation. IC Role / Device Role / Timing Role: Low-side switch that translates logic-high GPIO to grounded LED cathode path. Use Value: Eliminates need for discrete base resistor; ensures consistent LED brightness across production units due to matched R1 tolerance. |
Use Scenario: Level-shifting and buffering between 1.8 V FPGA I/O banks and 5 V peripheral logic. IC Role / Device Role / Timing Role: Digital buffer amplifier providing current gain and voltage isolation between incompatible logic families. Use Value: Prevents back-driving damage to low-voltage I/O while maintaining fast edge response (<100 ns turn-off). |
| Relay Coil Driver | Logic Inverter Stage |
|
Use Scenario: Switching 24 V DC relay coils rated ≤ 100 mA in building automation controllers. IC Role / Device Role / Timing Role: Saturated switch controlling coil current path to ground; includes flyback diode protection externally. Use Value: 50 V VCEO safely clamps inductive kickback; 250 mW Ptot accommodates brief surge currents during pull-in. |
Use Scenario: Implementing non-inverting logic gates using discrete transistors in legacy analog-digital hybrid systems. IC Role / Device Role / Timing Role: Active-low inverter stage where input high turns on PDTC143TK,115 to pull output low. Use Value: Predictable switching threshold defined by R1 value; avoids ambiguity seen in resistorless BJT inverters. |
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 |
|---|---|---|---|
| PDTA143TK | PNP complement with identical R1 = 4.7 kΩ, same SOT346 package and pinout (Pin 1 = base, Pin 2 = emitter, Pin 3 = collector). | Used in high-side switching or complementary push-pull stages instead of low-side; requires inverted control logic. | Select PDTA143TK when sourcing current from VCC rather than sinking to ground. |
| PDTC143ET,115 | Same R1 = 4.7 kΩ and electrical specs, but in smaller SOT416 (SC-75) package (1.7 × 1.3 × 0.95 mm); Rth(j-a) = 833 K/W. | Higher thermal resistance limits continuous current in thermally constrained designs; preferred for ultra-dense layouts. | Choose PDTC143ET,115 only if board area savings outweigh thermal derating requirements. |
Compared with PDTA143TK and PDTC143ET,115, the PDTC143TK,115 offers optimal balance of thermal performance (500 K/W), mechanical robustness (SOT346 leadform), and compatibility with standard TO-236 reflow profiles - making it the default choice for general-purpose low-side switching.
Availability
PDTC143TK,115 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface modules, and relay control systems requiring stable component supply and long-term industrial availability.
Supply support for PDTC143TK,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 discrete semiconductors, formed in 2017 from the former NXP Standard Products division, specializing in high-volume, high-reliability components for automotive, industrial, and consumer markets.
The PDTC143TK,115 belongs to Nexperia's resistor-equipped transistor (RET) product line, engineered to simplify digital switching designs by integrating bias resistors directly into the silicon die - reducing layout complexity and improving manufacturing yield.
FAQ
What is the pin configuration of PDTC143TK,115?
The PDTC143TK,115 uses SOT346 packaging with Pin 1 = base, Pin 2 = emitter, Pin 3 = collector. This matches the JEDEC TO-236AA standard and is verified in the official Nexperia datasheet Figure 3 "Simplified outline and symbol". No alternate pinouts exist for this variant.
Does PDTC143TK,115 have a built-in pull-down resistor?
No - PDTC143TK,115 has only one integrated resistor: R1 = 4.7 kΩ connected between base and input terminal. R2 is explicitly open (not connected), so no internal pull-down exists. External pull-down may be added if needed for fail-safe off-state behavior.
What is the maximum operating temperature for PDTC143TK,115?
The PDTC143TK,115 has a maximum junction temperature (Tj) of 150 °C and an operating ambient temperature range of −65 °C to +150 °C. Derating begins above 25 °C ambient per its 500 K/W thermal resistance and 250 mW power dissipation limit.
Can PDTC143TK,115 replace a standard 2N3904 with external base resistor?
Yes - PDTC143TK,115 can replace a 2N3904 + 4.7 kΩ base resistor in low-speed switching applications. Its integrated R1 provides identical biasing, while its guaranteed VCE(sat) ≤ 100 mV and hFE ≥ 200 ensure more consistent saturation than discrete implementations.
Is PDTC143TK,115 RoHS compliant and halogen-free?
Yes - PDTC143TK,115 meets RoHS Directive 2011/65/EU and is halogen-free per Nexperia's material declarations. The device carries the "115" suffix indicating compliance with lead-free reflow standards and green packaging requirements.
PDTC143TK,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):
- -
- 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:
- 250 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMT3; MPAK
PDTC143TK,115 FAQ
1.How can I place an order for PDTC143TK,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC143TK,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 PDTC143TK,115 reliable?
The price and inventory of PDTC143TK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC143TK,115 is usually 5 days.
3.What payment methods are accepted for PDTC143TK,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC143TK,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC143TK,115?
PDTC143TK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC143TK,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 PDTC143TK,115?
For technical support, including PDTC143TK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC143TK,115 requirements.
6.How does Aetrix verify that PDTC143TK,115 is sourced from the original manufacturer or authorized distributors?
All PDTC143TK,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 PDTC143TK,115 meets industry standards.
7.What is the process for return or replacement of PDTC143TK,115?
All PDTC143TK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC143TK,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 PDTC143TK,115 part is unused and in its original packaging.
Return procedure for PDTC143TK,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PDTC143TK,115 Tags
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MUN5211T1G
onsemi
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DTC043ZEBTL
Rohm Semiconductor
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DTC114EKAT146
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DDTD113ZC-7-F
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DRDNB16W-7
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Nexperia USA Inc.
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MMUN2211LT1G
onsemi
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