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 PDTC115TU,115

Name: PDTC115TU,115
Brand: NXP Semiconductors
SKU: PDTC115TU,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PDTC115TU,115

Manufacturer:: NXP Semiconductors

Category:: Single, Pre-Biased Bipolar Transistors

Package:: -

Datasheet:: PDTC115TU,115.pdf

Description:: TRANS NPN W/RES 50V SOT323

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:179,680

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

Product details

Overview

PDTC115TU,115 from Nexperia is an NPN resistor-equipped transistor (RET) in SOT323 (SC-70) package, featuring integrated 100 kΩ base bias resistor (R1), 50 V V_CEO, 100 mA I_O, and 200 mW P_tot. It functions as a single-transistor switch in low-power digital interface circuits, eliminating external bias components in microcontroller GPIO-driven loads such as LED indicators and small-signal relays.

For engineers reviewing the PDTC115TU,115 datasheet, PDTC115TU,115 pinout, PDTC115TU,115 application, or PDTC115TU,115 equivalent, key selection criteria include built-in R1 tolerance (70–130 kΩ), emitter-grounded pinout configuration, DC current gain (h_FE ≥100 at I_C = 1 mA), saturation voltage (V_CEsat ≤150 mV), and thermal resistance (R_th(j-a) = 625 K/W).

Technical Context

This RET integrates a single NPN silicon transistor with one external-base resistor (R1) and no second resistor (R2 = open), forming a two-terminal input (base-emitter) and three-terminal device. Its fixed bias network enables direct connection to logic-level drivers without discrete resistors.

Designed for DC switching-not linear amplification-it exhibits guaranteed h_FE ≥100 at I_C = 1 mA and V_CE = 5 V, with V_CEsat specified at I_C = 5 mA / I_B = 0.25 mA. The SOT323 package supports reflow-only assembly per manufacturer guidelines.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum collector-emitter voltage before breakdown; defines safe operating range for 3.3 V/5 V logic-driven loads.
I_O	100 mA - Continuous DC output current capability; sufficient for driving LEDs, small relays, or logic buffers.
R1	100 kΩ (70–130 kΩ) - Integrated base bias resistor; eliminates need for external pull-up/pull-down, reducing BOM count by one component.
h_FE	≥100 @ I_C = 1 mA - Minimum DC current gain ensures reliable saturation with low base drive current (e.g., 10 µA base current supports 1 mA collector current).
V_CEsat	≤150 mV @ I_C = 5 mA, I_B = 0.25 mA - Low saturation voltage minimizes power loss and self-heating during on-state operation.
P_tot	200 mW @ T_amb ≤25 °C - Total power dissipation limit; requires derating above ambient temperature per R_th(j-a) = 625 K/W.
C_c	2.5 pF @ V_CB = 10 V, f = 1 MHz - Collector junction capacitance; impacts high-frequency switching speed and noise coupling in digital interfaces.

Pinout & Package

SOT323 (SC-70) is a 3-lead surface-mount plastic package measuring 2.2 × 1.35 × 0.9 mm (L × W × H), optimized for high-density PCB layouts and automated placement. Thermal resistance is 625 K/W (junction-to-ambient, free air).

Pin/Terminal	Circuit Role	Design Meaning
1	Input (base)	Connected internally to R1; accepts logic-level voltage (e.g., 3.3 V/5 V) to enable transistor conduction.
2	GND (emitter)	Common reference node; must be tied to system ground to complete bias path and collector current loop.
3	Output (collector)	Switched output node; sinks current from load (e.g., LED anode or relay coil) to ground when active.

Key Features

Feature	Design Value
Integrated bias resistor R1	100 kΩ ±30 % - Enables direct logic-level drive without external resistor, reducing layout area and assembly steps.
Emitter-grounded topology	Fixed pin 2 as GND - Simplifies PCB routing and eliminates ambiguity in grounding strategy for low-side switching.
Guaranteed h_FE ≥100	At I_C = 1 mA, V_CE = 5 V - Ensures predictable turn-on behavior across process and temperature variations.
Low V_CEsat	≤150 mV under rated conditions - Limits power dissipation to <0.75 mW at 5 mA, supporting thermally constrained designs.
Reflow-compatible packaging	SOT323 with Pb-free terminations - Complies with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for standard reflow profiles.

Applications

LED Indicator Driver

Microcontroller GPIO Expander

Use Scenario: Driving status LEDs from 3.3 V MCU GPIO pins with limited current sourcing capability.

IC Role / Device Role / Timing Role: Low-side switch that sinks LED current through collector while base is driven directly by GPIO.

Use Value: Eliminates need for external base resistor; reduces bill-of-materials and PCB footprint versus discrete transistor + resistor solution.

Use Scenario: Extending limited GPIO count to control multiple peripheral enable lines (e.g., sensors, displays).

IC Role / Device Role / Timing Role: Digital buffer/switch translating MCU logic outputs into higher-current enable signals.

Use Value: Provides 100 mA sink capability per channel with guaranteed saturation, enabling direct drive of 5 V peripherals from 3.3 V logic.

Inverter Circuit

Level-Shifting Interface

Use Scenario: Implementing non-inverting logic gates using active pull-down with passive pull-up resistors.

IC Role / Device Role / Timing Role: Active inverter stage where input high → output low, leveraging fixed R1 for consistent threshold.

Use Value: Delivers sharp transition with minimal propagation delay (<100 ns typical) and eliminates resistor matching tolerances.

Use Scenario: Interfacing 1.8 V or 3.3 V logic domains to 5 V legacy peripherals requiring TTL-compatible inputs.

IC Role / Device Role / Timing Role: Voltage-level translator configured as open-collector driver with external pull-up to 5 V rail.

Use Value: Supports bidirectional signal translation with <150 mV dropout, ensuring valid LOW recognition by 5 V receivers.

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 (vs. 100 kΩ); h_FE ≥60; same SOT323 package	Higher base current draw; better suited for lower-V_CC (1.8 V) logic or faster switching	Select when driving from sub-3 V sources or requiring faster turn-on with higher I_B.
MMBT3904LT1G	No integrated resistor; discrete NPN; requires external 100 kΩ base resistor	Greater flexibility in bias network design but increases component count and layout complexity	Choose when adjustable gain, variable switching thresholds, or multi-resistor configurations are required.

Compared with PDTC124EU,115, PDTC115TU,115 offers higher input impedance and lower base current demand; compared with MMBT3904LT1G, it trades design flexibility for reduced BOM and layout effort-ideal for cost-sensitive, high-volume digital interface applications.

Availability

PDTC115TU,115 is available at Aetrix Electronics and suitable for LED indicator systems, microcontroller peripheral interfaces, logic-level inverters, and 3.3 V/5 V domain translators requiring stable component supply and long-term production continuity.

Supply support for PDTC115TU,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, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with focus on automotive, industrial, computing, and consumer markets.

PDTC115TU,115 belongs to the PDTC115T series of NPN resistor-equipped transistors designed specifically for space-constrained, high-efficiency digital switching in portable and embedded systems.

FAQ

What is the function of R2 in the PDTC115TU,115?

R2 is not present-the datasheet explicitly states "R2 = open" for the entire PDTC115T series. This means only one internal bias resistor (R1) connects between base and input pin; the emitter is directly accessible as a separate terminal, enabling standard low-side switching topologies without emitter feedback.

Can PDTC115TU,115 be used in analog amplifier configurations?

No-it is characterized and qualified exclusively for switching applications. The datasheet provides no linearity, frequency response, or small-signal parameters (e.g., f_T, g_m). Its guaranteed h_FE applies only at I_C = 1 mA, and V_CEsat is specified only under saturated switching conditions.

Is PDTC115TU,115 RoHS compliant and halogen-free?

Yes. As a Nexperia product manufactured after 2017, PDTC115TU,115 meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21:2011 for halogen-free materials. Its SOT323 package uses lead-free matte tin terminations and green molding compound.

What is the maximum allowable ambient temperature for continuous operation?

Maximum ambient temperature is +150 °C per limiting values table, but practical continuous operation is constrained by thermal derating: at T_amb = 85 °C, usable P_tot drops to ~100 mW (derated from 200 mW at 25 °C using R_th(j-a) = 625 K/W), limiting I_O to ~70 mA for safe junction temperature margin.

PDTC115TU,115 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Transistor Type:: -

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

Voltage - Collector Emitter Breakdown (Max):: -

Resistor - Base (R1):: -

Resistor - Emitter Base (R2):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: -

Vce Saturation (Max) @ Ib, Ic:: -

Current - Collector Cutoff (Max):: -

Frequency - Transition:: -

Power - Max:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

PDTC115TU,115 FAQ

1.How can I place an order for PDTC115TU,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for PDTC115TU,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 PDTC115TU,115 reliable?

The price and inventory of PDTC115TU,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTC115TU,115 is usually 5 days.

3.What payment methods are accepted for PDTC115TU,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTC115TU,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PDTC115TU,115?

PDTC115TU,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PDTC115TU,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 PDTC115TU,115?

For technical support, including PDTC115TU,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTC115TU,115 requirements.

6.How does Aetrix verify that PDTC115TU,115 is sourced from the original manufacturer or authorized distributors?

All PDTC115TU,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 PDTC115TU,115 meets industry standards.

7.What is the process for return or replacement of PDTC115TU,115?

All PDTC115TU,115 units undergo pre-shipment inspection (PSI). If there is an issue with PDTC115TU,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 PDTC115TU,115 part is unused and in its original packaging.

Return procedure for PDTC115TU,115:

1.Submit a request within 90 days.

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

Tech Hub

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…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…

2026-07-17 Raspberry Pi Alternatives: Chip-Level Comparison, Compatibility and Replacement Guide

Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…