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

Nexperia USA Inc. PDTA123JT-QR

Name: PDTA123JT-QR
Brand: Nexperia USA Inc.
SKU: PDTA123JT-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PDTA123JT-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single, Pre-Biased Bipolar Transistors

Package:: -

Datasheet:: PDTA123JT-QR.pdf

Description:: PDTA123ZT-Q/SOT23/TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:9,845

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Product details

Overview

PDTA123JT-QR from Nexperia is a PNP resistor-equipped transistor (RET) in SOT23 package, integrating R1 = 2.2 kΩ and R2 = 47 kΩ bias resistors. It delivers −100 mA output current, −50 V collector-emitter voltage rating, and AEC-Q101 qualification for automotive digital switching applications such as microcontroller I/O interfacing and LED load control.

For engineers reviewing the PDTA123JT-QR datasheet, PDTA123JT-QR pinout, PDTA123JT-QR application, or PDTA123JT-QR equivalent, key selection criteria include built-in resistor ratio (R2/R1 = 21 typ), on-state input voltage (−0.75 V typ at IC = −5 mA), saturation voltage (−100 mV max), and thermal resistance (500 K/W junction-to-ambient).

Technical Context

This RET implements a monolithic PNP bipolar transistor with two integrated precision bias resistors: R1 connected between base and input, and R2 between base and emitter. The fixed R2/R1 ratio of 21 enables predictable DC current gain control without external components.

It operates as a single-stage digital switch with defined turn-on (VI(on) = −0.75 V typ) and turn-off (VI(off) = −0.6 V typ) thresholds, eliminating need for discrete base resistors in logic-level driven circuits. Its AEC-Q101 qualification confirms suitability for automotive under-hood and body-control modules.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V - Maximum safe collector-emitter voltage before breakdown; supports 24 V automotive rail switching with margin.
I_O	−100 mA - Continuous output current capability; sufficient for driving LEDs, relays, or logic inputs.
R1	2.2 kΩ ±28% - Input bias resistor enabling direct connection to 3.3 V/5 V logic outputs without external current limiting.
R2/R1	21 typ - Fixed internal resistor ratio ensuring stable h_FE control and consistent switching behavior across temperature.
V_CE(sat)	−100 mV max - Low saturation voltage minimizes power loss and self-heating during conduction.
h_FE	100 min at I_C = −10 mA - Guaranteed DC current gain ensures reliable switching even with marginal drive conditions.
f_T	180 MHz typ - Transition frequency supports fast digital switching up to ~10–20 MHz edge rates.

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; 1.9 mm × 1.1 mm × 1.3 mm body dimensions; standard reflow-compatible footprint per Figure 18.

Pin/Terminal	Circuit Role	Design Meaning
1	Input (base)	Connected internally to R1; accepts logic-level voltage to enable transistor conduction.
2	GND (emitter)	Common reference node; ties to system ground or low-side return path.
3	Output (collector)	Switched high-side output node; sinks current from load to emitter when active.

Key Features

Feature	Design Value
Integrated bias network	Monolithic R1 = 2.2 kΩ + R2 = 47 kΩ eliminates 2 external resistors and reduces PCB area by >30%.
AEC-Q101 qualified	Validated for automotive temperature range (−40 °C to +150 °C) and mechanical stress requirements.
Low V_CE(sat)	≤ −100 mV at I_C = −5 mA ensures <0.5 mW conduction loss, critical for thermally constrained modules.
Reduced pick-and-place cost	Single-component replacement for BC857 + two resistors lowers placement cycle count and feeder complexity.
Logic-compatible VI(on)	−0.75 V typical on-threshold allows direct interface with 3.3 V CMOS outputs without level shifting.

Applications

Automotive Body Control Module

Industrial PLC Input Stage

Use Scenario: Driving door lock actuators and interior lighting loads from MCU GPIO pins.

IC Role / Device Role / Timing Role: High-side switch controlling 12 V loads with logic-level enable; provides galvanic isolation from MCU core.

Use Value: Eliminates need for discrete base resistors and reduces BOM count while maintaining AEC-Q101 compliance.

Use Scenario: Interfacing 24 V industrial sensors to 3.3 V microcontroller inputs via optocoupler driver circuitry.

IC Role / Device Role / Timing Role: Level-shifting digital signal conditioner converting 24 V sink signals to clean 0 V/3.3 V logic levels.

Use Value: Built-in resistor ratio ensures stable threshold behavior across wide temperature and supply variations.

Consumer Appliance Power Sequencing

Automotive LED Lighting Control

Use Scenario: Enabling auxiliary power rails in smart home hubs only after main controller initialization.

IC Role / Device Role / Timing Role: Controlled power switch activated by MCU reset release signal; provides sequencing delay via RC timing.

Use Value: Integrated R1/R2 simplifies timing network design and improves production yield versus discrete solutions.

Use Scenario: Dimmable tail-light and brake-light current control in vehicle rear lamp assemblies.

IC Role / Device Role / Timing Role: PWM-driven current sink for constant-current LED strings; handles up to 100 mA pulsed load.

Use Value: Low V_CE(sat) and 150 °C T_j rating ensure reliability in sealed, thermally isolated lamp housings.

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
PDTC123JT	NPN complement with identical R1/R2 values and SOT23 package; requires inverted logic drive.	Used where load is connected to V_CC and switching occurs on low-side; not drop-in compatible.	Select when circuit topology favors NPN low-side switching and logic inversion is acceptable.
BC857B,115	Discrete PNP transistor without integrated resistors; requires two external bias resistors.	Offers higher h_FE (200–450) but increases component count and layout area.	Choose when precise gain tuning or higher current gain is required and board space permits extra passives.

Compared with PDTC123JT, PDTA123JT-QR provides native high-side switching with non-inverted logic control; versus BC857B, it reduces bill-of-materials and improves assembly yield at the cost of fixed bias ratio and slightly lower h_FE.

Availability

PDTA123JT-QR is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input conditioning, and consumer appliance power sequencing requiring stable component supply and AEC-Q101 assurance.

Supply support for PDTA123JT-QR 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, spun off from NXP's Standard Products division in 2017 and focused on automotive, industrial, computing, and consumer markets.

The PDTA123J series belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, designed specifically to simplify digital switching circuits by integrating precision bias networks into compact SMD packages.

FAQ

What is the maximum ambient temperature for continuous operation of PDTA123JT-QR?

The device supports continuous operation from −65 °C to +150 °C ambient temperature. At Tamb = 25 °C, its total power dissipation is rated at 250 mW; derating begins linearly above 25 °C per the 500 K/W thermal resistance curve, reaching zero dissipation at ~175 °C junction temperature.

Can PDTA123JT-QR replace BC857 in existing designs without layout changes?

Yes, PDTA123JT-QR uses the same SOT23 package and pinout (1=base, 2=emitter, 3=collector) as BC857, enabling direct PCB footprint reuse. However, because it integrates R1 and R2, external base resistors must be removed to avoid double-biasing and potential malfunction.

Is PDTA123JT-QR suitable for PWM-driven LED dimming applications?

Yes - with −100 mA continuous output current and −100 mV V_CE(sat), it supports PWM frequencies up to several hundred kHz. Its 180 MHz f_T and fast switching characteristics (typical t_on/t_off < 5 ns) ensure minimal distortion in duty-cycle-controlled LED current paths.

Does PDTA123JT-QR require special soldering processes?

Reflow soldering is the only recommended method per Nexperia's specification. Wave soldering is not advised due to thermal stress risks. The SOT23 footprint complies with JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), requiring no pre-bake for standard handling and assembly.

PDTA123JT-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: -

Packaging:: Tape & Reel (TR)

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:: -

PDTA123JT-QR FAQ

1.How can I place an order for PDTA123JT-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PDTA123JT-QR 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 PDTA123JT-QR reliable?

The price and inventory of PDTA123JT-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTA123JT-QR is usually 5 days.

3.What payment methods are accepted for PDTA123JT-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTA123JT-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PDTA123JT-QR?

PDTA123JT-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PDTA123JT-QR 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 PDTA123JT-QR?

For technical support, including PDTA123JT-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTA123JT-QR requirements.

6.How does Aetrix verify that PDTA123JT-QR is sourced from the original manufacturer or authorized distributors?

All PDTA123JT-QR 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 PDTA123JT-QR meets industry standards.

7.What is the process for return or replacement of PDTA123JT-QR?

All PDTA123JT-QR units undergo pre-shipment inspection (PSI). If there is an issue with PDTA123JT-QR, 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 PDTA123JT-QR part is unused and in its original packaging.

Return procedure for PDTA123JT-QR:

1.Submit a request within 90 days.

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

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