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Nexperia USA Inc. PDTC143TU,135
- Part No.:
- PDTC143TU,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
PDTC143TU,135.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,500
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Product details
Overview
PDTC143TU,135 from Nexperia is an NPN resistor-equipped transistor (RET) with integrated 4.7 kΩ base bias resistor and open R2 terminal, designed for simplified digital switching in low-voltage logic interface circuits. It delivers 100 mA DC output current, 50 V VCEO, and 200 minimum hFE at 1 mA collector current - used in microcontroller GPIO-driven load control, LED drivers, and level-shifting buffers.
For engineers reviewing the PDTC143TU,135 datasheet, PDTC143TU,135 pinout, PDTC143TU,135 application, or PDTC143TU,135 equivalent, key selection criteria include its SOT323 (SC-70) package footprint, built-in bias network eliminating external resistors, saturation voltage under 100 mV at IC = 5 mA/IB = 0.25 mA, and thermal resistance of 625 K/W in free air.
Technical Context
This RET integrates a single 4.7 kΩ pull-up resistor between base and input terminal, with emitter grounded and collector as active output - forming a compact, two-terminal-input switch. Its internal topology eliminates need for discrete base resistors while maintaining predictable turn-on behavior across temperature.
Designed for direct interfacing with 3.3 V and 5 V CMOS/TTL logic, it operates with VEB(max) = 5 V and exhibits low leakage: ICEO ≤ 1 μA at VCE = 30 V and ≤ 50 μA at Tj = 150 °C - supporting reliable operation in ambient temperatures from −65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - supports safe switching of 24 V industrial control signals without breakdown |
| IO (DC) | 100 mA - drives medium-current loads like small relays, LEDs, or logic inputs directly |
| R1 | 4.7 kΩ ±25% - sets defined base current for predictable saturation with 3.3–5 V logic drive |
| VCE(sat) | ≤100 mV at IC=5 mA/IB=0.25 mA - ensures minimal power loss and heat generation in on-state |
| hFE | ≥200 at VCE=5 V, IC=1 mA - provides high current gain for low-drive applications |
| Ptot | 200 mW at Tamb ≤25 °C - defines maximum continuous dissipation in SOT323 package |
| Rth(j-a) | 625 K/W - indicates thermal performance limitation requiring careful PCB copper area planning |
Pinout & Package
PDTC143TU,135 is housed in a plastic surface-mounted SOT323 (SC-70) package measuring 2.2 × 1.35 × 1.15 mm, optimized for high-density PCB layouts and reflow soldering only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Input node connected to internal R1 | Accepts logic-level signal; R1 pulls base up to enable conduction when driven low |
| 2 (Emitter) | Reference terminal | Internally tied to ground reference; forms common return path for input and output currents |
| 3 (Collector) | Switched output terminal | Sinks load current when transistor is saturated; connects to load supply rail via external component |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistor | Single 4.7 kΩ resistor eliminates need for external base resistor, reducing BOM count by one part |
| Low saturation voltage | VCE(sat) ≤100 mV enables efficient switching of 3.3 V logic-controlled loads with <100 mW dissipation |
| SOT323 footprint | 2.2 × 1.35 mm body size allows placement in space-constrained IoT sensor nodes and wearables |
| High hFE consistency | Minimum 200 hFE at 1 mA ensures stable turn-on across manufacturing lots and temperature ranges |
Applications
| Microcontroller GPIO Interface | LED Driver Circuit |
|---|---|
Use Scenario: Driving discrete LEDs from 3.3 V MCU pins with limited current sourcing capability. IC Role / Device Role / Timing Role: Acts as low-side switch, sinking LED current to ground when MCU pin goes low. Use Value: Built-in 4.7 kΩ resistor ensures correct base current without external components, enabling direct connection to STM32 or ESP32 GPIO. | Use Scenario: Controlling status indicators in battery-powered portable devices. IC Role / Device Role / Timing Role: Provides digitally controlled on/off switching for red/green/blue indicator LEDs. Use Value: 100 mV VCE(sat) minimizes voltage drop and extends battery life in always-on display applications. |
| Logic Level Shifter | Relay Driver Stage |
Use Scenario: Translating 1.8 V FPGA I/O to 5 V peripheral enable lines. IC Role / Device Role / Timing Role: Functions as unidirectional level translator using emitter-follower configuration. Use Value: 50 V VCEO rating safely isolates higher-voltage domains while maintaining fast edge response. | Use Scenario: Activating 5 V/10 mA coil relays in industrial PLC input modules. IC Role / Device Role / Timing Role: Serves as final-stage driver between optocoupler output and relay coil. Use Value: 100 mA IO rating exceeds typical relay coil requirements, ensuring robust turn-on margin. |
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 |
|---|---|---|---|
| PDTC124EU,115 | R1 = 22 kΩ; hFE min = 60 - lower base current, reduced gain | Better suited for high-impedance 1.8 V logic interfaces where lower IB is required | Select when driving from ultra-low-power MCUs with weak output drive capability |
| MMBT3904LT1G | No integrated resistor; requires external 4.7 kΩ base resistor; hFE min = 100 | Higher design flexibility but increases component count and layout area | Choose when precise bias tuning or multi-configuration reuse is needed across product variants |
Compared with PDTC124EU,115, PDTC143TU,135 delivers higher gain and stronger drive for 3.3 V systems; versus MMBT3904LT1G, it reduces bill-of-materials cost and PCB real estate at the expense of configurability.
Availability
PDTC143TU,135 is available at Aetrix Electronics and suitable for industrial control panels, consumer appliance PCBs, and IoT sensor node designs requiring stable component supply and long-term production continuity.
Supply support for PDTC143TU,135 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 discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.
PDTC143TU,135 belongs to the PDTC143T series of NPN resistor-equipped transistors engineered for cost-sensitive, high-reliability digital switching in space-constrained applications - emphasizing simplified design and assembly efficiency.
FAQ
What is the function of the open R2 terminal in PDTC143TU,135?
The R2 terminal is internally left unconnected (open), meaning only one bias resistor (R1 = 4.7 kΩ) is present between base and input. This configuration creates a simple, single-resistor input network ideal for basic low-side switching - unlike dual-resistor RETs that provide voltage-divider biasing for analog amplification or precision threshold control.
Can PDTC143TU,135 be used in linear amplifier mode?
No - PDTC143TU,135 is optimized for digital switching, not analog amplification. Its fixed R1 value and lack of R2 prevent stable DC bias point setting for Class-A operation. The datasheet specifies parameters only under switching conditions (e.g., VCE(sat), hFE at IC = 1 mA), with no linearity, frequency response, or noise specifications provided.
Is PDTC143TU,135 RoHS compliant and halogen-free?
Yes - as a Nexperia standard product manufactured post-2017, PDTC143TU,135 meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The SOT323 package uses lead-free matte tin terminal finish and complies with JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30 °C/60% RH.
How does thermal performance compare between SOT323 and SOT23 packages for this device?
PDTC143TU,135 in SOT323 has Rth(j-a) = 625 K/W, versus 500 K/W for the SOT23 variant (PDTC143TT). This 25% higher thermal resistance means the SOT323 version reaches junction temperature faster under identical power dissipation - requiring larger copper pads or thermal vias to maintain Tj ≤150 °C in continuous 100 mA operation.
PDTC143TU,135 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,135 FAQ
1.How can I place an order for PDTC143TU,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for PDTC143TU,135 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,135 reliable?
The price and inventory of PDTC143TU,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC143TU,135 is usually 5 days.
3.What payment methods are accepted for PDTC143TU,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC143TU,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PDTC143TU,135?
PDTC143TU,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PDTC143TU,135 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,135?
For technical support, including PDTC143TU,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC143TU,135 requirements.
6.How does Aetrix verify that PDTC143TU,135 is sourced from the original manufacturer or authorized distributors?
All PDTC143TU,135 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,135 meets industry standards.
7.What is the process for return or replacement of PDTC143TU,135?
All PDTC143TU,135 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC143TU,135, 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,135 part is unused and in its original packaging.
Return procedure for PDTC143TU,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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