Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single, Pre-Biased Bipolar Transistors

NXP Semiconductors PDTA144WK,115

Name: PDTA144WK,115
Brand: NXP Semiconductors
SKU: PDTA144WK,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PDTA144WK,115

Manufacturer:: NXP Semiconductors

Category:: Single, Pre-Biased Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: PDTA144WK,115.pdf

Description:: TRANS PREBIAS PNP 50V 0.1A SMT3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:6,233

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PDTA144WK from Nexperia is a PNP resistor-equipped transistor with integrated bias resistors R1 = 47 kΩ and R2 = 22 kΩ, designed for general-purpose switching in low-power digital interface circuits. It features V_CEO = −50 V, I_O = −100 mA DC output current, and operates in SOT346 (SC-59) surface-mount package with verified 3-pin pinout (base-collector-emitter). Used in level-shifting inverters and microcontroller I/O drivers where component count reduction is critical.

For engineers reviewing the PDTA144WK datasheet, PDTA144WK pinout, PDTA144WK application, or PDTA144WK equivalent, key selection criteria include its built-in resistor network eliminating external bias components, −50 V collector-emitter blocking capability, −100 mA saturation current handling, and compatibility with reflow-only soldering per JEDEC J-STD-020.

Technical Context

This device integrates two precision thin-film resistors (R1 = 47 kΩ, R2 = 22 kΩ) directly into a PNP bipolar transistor die to form a single-input, single-output digital switch. Its internal resistor ratio (R2/R1 ≈ 0.47) sets predictable input threshold behavior without external tuning.

The PDTA144WK operates as a saturated switch with V_CEsat ≤ −150 mV at I_C = −10 mA / I_B = −0.5 mA, and supports input voltage ranges from −40 V (negative transient) to +10 V (positive logic), enabling robust interfacing between mixed-voltage domains.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V: Maximum safe collector-emitter reverse voltage before breakdown; enables use in 3.3 V/5 V/12 V rail-switching applications.
I_O (DC)	−100 mA: Continuous output current rating; sufficient for driving LEDs, small relays, or logic inputs without external buffering.
R1	47 kΩ ±28%: Input pull-up resistor; defines high-state input impedance and determines base current when driven low.
R2	22 kΩ ±28%: Base-emitter feedback resistor; stabilizes operating point and ensures reliable turn-off during floating-input conditions.
V_CEsat	≤ −150 mV at I_C = −10 mA: Low saturation voltage minimizes power loss and heat generation in switching mode.
T_j max	150 °C: Maximum junction temperature; allows operation in industrial ambient environments up to +85 °C with appropriate PCB copper area.
P_tot	250 mW at T_amb ≤ 25 °C: Total power dissipation limit in SOT346 package; requires thermal derating above 25 °C ambient.

Pinout & Package

Package: SOT346 (SC-59), plastic surface-mounted package with 3 leads; body dimensions 3.0 × 1.7 × 1.3 mm; optimized for automated pick-and-place and reflow soldering only.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Input terminal connected internally to R1 and R2; accepts TTL/CMOS logic-level signals directly without external biasing.
2	Collector	High-side switched output node; connects to load supply rail (e.g., V_CC) when used in high-side switch configuration.
3	Emitter	Common reference terminal tied to system ground; provides return path for load current and establishes emitter-follower or common-emitter topology.

Key Features

Feature	Design Value
Built-in bias resistors R1/R2	Eliminates need for two external resistors, reducing BOM count by 2 parts and saving ~1.5 mm² PCB area in SOT346 layout.
Guaranteed V_CEsat ≤ −150 mV	Ensures <150 mW conduction loss at 10 mA load, supporting thermally constrained designs like wearable sensor nodes.
Input voltage range −40 V to +10 V	Withstands negative transients (e.g., inductive kickback) and interfaces safely with both 3.3 V and 5 V logic families.
JEDEC-compliant SOT346 footprint	Enables drop-in replacement of legacy PNP switches (e.g., MMBT3906) while adding integrated biasing functionality.

Applications

Microcontroller I/O Interface	LED Driver Circuit
Use Scenario: Driving discrete LEDs from 3.3 V GPIO pins with limited sink current capability. IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode to source current to LED anode while sinking through cathode to ground. Use Value: Built-in R1/R2 eliminates external bias network, reducing component count and enabling direct connection to MCU pins without level-shifting circuitry.	Use Scenario: Controlling indicator LEDs in battery-powered IoT sensors where board space and assembly cost are critical. IC Role / Device Role / Timing Role: High-side current source switch placing LED between V_BAT and collector, with emitter grounded. Use Value: 250 mW power rating and −100 mA output support multiple parallel LEDs at 5–10 mA each within thermal limits of SOT346 package.
Inverter Logic Stage	Level-Shifting Interface
Use Scenario: Implementing non-inverting logic buffer stages in compact signal conditioning subcircuits. IC Role / Device Role / Timing Role: Configured as emitter-follower to provide voltage gain ≈ 1 and high input impedance for preceding analog/digital stages. Use Value: V_BE tracking via R2 ensures stable DC bias across temperature, maintaining consistent logic thresholds over −65 °C to +150 °C.	Use Scenario: Translating 1.8 V logic outputs to control 5 V peripherals in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: PNP switch used in open-collector-like configuration with pull-up to 5 V rail on collector side. Use Value: −40 V input tolerance protects against overshoot during fast edge transitions, and R1/R2 network ensures clean switching even with slow-rising 1.8 V signals.

Microcontroller I/O Interface

LED Driver Circuit

Use Scenario: Driving discrete LEDs from 3.3 V GPIO pins with limited sink current capability.

IC Role / Device Role / Timing Role: PNP switch configured in common-emitter mode to source current to LED anode while sinking through cathode to ground.

Use Value: Built-in R1/R2 eliminates external bias network, reducing component count and enabling direct connection to MCU pins without level-shifting circuitry.

Use Scenario: Controlling indicator LEDs in battery-powered IoT sensors where board space and assembly cost are critical.

IC Role / Device Role / Timing Role: High-side current source switch placing LED between V_BAT and collector, with emitter grounded.

Use Value: 250 mW power rating and −100 mA output support multiple parallel LEDs at 5–10 mA each within thermal limits of SOT346 package.

Inverter Logic Stage

Level-Shifting Interface

Use Scenario: Implementing non-inverting logic buffer stages in compact signal conditioning subcircuits.

IC Role / Device Role / Timing Role: Configured as emitter-follower to provide voltage gain ≈ 1 and high input impedance for preceding analog/digital stages.

Use Value: V_BE tracking via R2 ensures stable DC bias across temperature, maintaining consistent logic thresholds over −65 °C to +150 °C.

Use Scenario: Translating 1.8 V logic outputs to control 5 V peripherals in mixed-voltage embedded systems.

IC Role / Device Role / Timing Role: PNP switch used in open-collector-like configuration with pull-up to 5 V rail on collector side.

Use Value: −40 V input tolerance protects against overshoot during fast edge transitions, and R1/R2 network ensures clean switching even with slow-rising 1.8 V signals.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP resistor-equipped transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PDTC144WK	NPN complement with identical R1/R2 values (47 kΩ/22 kΩ), same SOT346 package and marking code "46".	Requires inverted logic drive (active-high input for NPN vs active-low for PDTA144WK); not interchangeable without circuit modification.	Select PDTC144WK only when sourcing current from ground is preferred or when existing NPN-based design reuse is required.
MMBT3906VL	Standard PNP transistor without integrated resistors; requires external R1/R2 network; same SOT23 package but different pinout (emitter-collector-base).	Higher BOM count and layout area needed; lacks guaranteed input threshold due to h_FE variation; suitable only when bias tuning is required.	Choose MMBT3906VL only if variable gain or adjustable switching threshold is necessary; otherwise PDTA144WK reduces design complexity.

Compared with PDTC144WK and MMBT3906VL, the PDTA144WK delivers plug-and-play digital switching with fixed biasing, eliminating resistor selection and placement effort while maintaining full compatibility with SOT346 assembly processes and thermal profiles.

Availability

PDTA144WK is available at Aetrix Electronics and suitable for microcontroller I/O interface, LED driver circuit, and inverter logic stage applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for PDTA144WK 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, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with focus on automotive, industrial, computing, consumer, and wearable markets.

The PDTA144WK belongs to Nexperia's resistor-equipped transistor (RET) product line, engineered specifically to simplify digital interface design by integrating precision bias networks into standard bipolar packages.

FAQ

What is the pin configuration of the PDTA144WK?

The PDTA144WK uses SOT346 (SC-59) package with confirmed pinout: Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter. This configuration is explicitly documented in the "Simplified outline, symbol and pinning" section of the official Nexperia datasheet, and matches the physical marking "46" on the device body.

Does the PDTA144WK require external bias resistors?

No, the PDTA144WK does not require external bias resistors. It integrates R1 = 47 kΩ and R2 = 22 kΩ internally, as confirmed in the Quick Reference Data and Characteristics tables. This eliminates the need for two discrete resistors, simplifying circuit design and reducing PCB footprint - a core feature of the PDTA144WK series.

What is the maximum continuous collector current for the PDTA144WK?

The maximum continuous DC output current (I_O) for the PDTA144WK is −100 mA, as specified in the Quick Reference Data and Limiting Values tables. This rating applies under standard mounting conditions at T_amb ≤ 25 °C and is supported by the 250 mW total power dissipation limit of its SOT346 package.

Can the PDTA144WK be used in place of a standard PNP transistor like the MMBT3906?

The PDTA144WK can replace the MMBT3906 in many switching applications, but only when its integrated bias network aligns with the circuit requirements. Unlike the MMBT3906, the PDTA144WK has fixed internal resistors and a different pinout (base-collector-emitter vs emitter-collector-base), so direct substitution requires schematic and layout review.

Is reflow soldering required for the PDTA144WK?

Yes, reflow soldering is the only recommended soldering method for the PDTA144WK, as stated in Note 2 of the Limiting Values section. Wave soldering or hand soldering is not advised due to thermal sensitivity and package construction; this requirement applies specifically to the SOT346 variant of the PDTA144WK.

PDTA144WK,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:: PNP - Pre-Biased

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 50 V

Resistor - Base (R1):: 47 kOhms

Resistor - Emitter Base (R2):: 22 kOhms

DC Current Gain (hFE) (Min) @ Ic, Vce:: 60 @ 5mA, 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

PDTA144WK,115 FAQ

1.How can I place an order for PDTA144WK,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PDTA144WK,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 PDTA144WK,115 reliable?

The price and inventory of PDTA144WK,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTA144WK,115 is usually 5 days.

3.What payment methods are accepted for PDTA144WK,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTA144WK,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PDTA144WK,115?

PDTA144WK,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PDTA144WK,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 PDTA144WK,115?

For technical support, including PDTA144WK,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTA144WK,115 requirements.

6.How does Aetrix verify that PDTA144WK,115 is sourced from the original manufacturer or authorized distributors?

All PDTA144WK,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 PDTA144WK,115 meets industry standards.

7.What is the process for return or replacement of PDTA144WK,115?

All PDTA144WK,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTA144WK,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 PDTA144WK,115 part is unused and in its original packaging.

Return procedure for PDTA144WK,115:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…