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

Nexperia USA Inc. PDTB123YT-QR

Name: PDTB123YT-QR
Brand: Nexperia USA Inc.
SKU: PDTB123YT-QR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PDTB123YT-QR

Manufacturer:: Nexperia USA Inc.

Category:: Single, Pre-Biased Bipolar Transistors

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

Datasheet:: PDTB123YT-QR.pdf

Description:: TRANS PREBIAS PNP 50V TO236AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PDTB123YT-QR from Nexperia is a PNP resistor-equipped transistor (RET) in SOT23 package, designed for digital switching in automotive and industrial systems. It delivers −500 mA output current, −50 V collector-emitter voltage, built-in R1 = 2.2 kΩ and R2 = 10 kΩ bias resistors, and ±10 % R2/R1 tolerance. It serves as a direct replacement for BC807-series transistors in load-switching and IC-input control circuits.

For engineers reviewing the PDTB123YT-QR datasheet, PDTB123YT-QR pinout, PDTB123YT-QR application, or PDTB123YT-QR equivalent, key selection criteria include guaranteed −500 mA sink capability, AEC-Q101 qualification, integrated bias network with 4.55 typ. R2/R1 ratio, and verified performance across −40 °C to +150 °C ambient range.

Technical Context

This RET integrates a PNP bipolar junction transistor with two precision on-die resistors: R1 (2.2 kΩ) connected between base and input, and R2 (10 kΩ) from base to emitter. The fixed R2/R1 ratio of 4.55 enables predictable DC biasing without external components.

It operates as a single-stage digital switch with defined VI(on) (−1.0 V typ. at IC = −20 mA) and VI(off) (−0.6 V typ. at IC = −100 µA), supporting clean logic-level interfacing to microcontrollers and gate drivers while maintaining AEC-Q101 compliance for under-hood automotive use.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−50 V: Maximum safe collector-emitter voltage with open base; defines high-side switching headroom in 12 V/24 V automotive rails.
I_O	−500 mA: Continuous DC output current rating; supports driving solenoids, relays, and LED arrays without external heatsinking.
R1	2.2 kΩ ±10 %: Input bias resistor enabling direct TTL/CMOS logic drive; eliminates need for discrete base resistor.
R2/R1	4.55 ±10 %: Fixed internal resistor ratio ensuring stable h_FE-independent turn-on behavior and consistent saturation.
V_CE(sat)	−300 mV max at I_C = −50 mA / I_B = −2.5 mA: Low saturation voltage minimizes power loss and self-heating during conduction.
h_FE	70 min at V_CE = −5 V, I_C = −50 mA: Guaranteed DC current gain ensures reliable switching margin across temperature.
P_tot	250 mW at T_amb ≤ 25 °C: Thermal limit on standard FR4 PCB; defines maximum continuous power dissipation in compact layouts.

Pinout & Package

Package: SOT23 (TO-236AB), surface-mounted plastic package with 1.9 mm lead pitch, 2.9 mm × 1.3 mm × 1.0 mm body dimensions, and standard reflow footprint per Fig. 7.

Pin/Terminal	Circuit Role	Design Meaning
1	Input (base)	Logic-level signal entry point; connects internally to R1 and R2 network - no external base connection required.
2	Ground (emitter)	Emitter terminal tied to system ground; serves as common return path for switched load current.
3	Output (collector)	High-current sink node; connects to load (e.g., relay coil or LED anode) with supply referenced to V_CC.

Key Features

Feature	Design Value
AEC-Q101 qualified	Qualified for automotive applications per stress test standard; supports deployment in engine control, lighting, and body electronics.
Integrated R1 + R2 network	Eliminates two external resistors, reducing BOM count, PCB area, and placement cost in high-volume SMT assembly.
−500 mA output rating	Enables direct drive of medium-power loads (e.g., 12 V/100 mA solenoids) without secondary amplification stage.
±10 % R2/R1 tolerance	Ensures repeatable turn-on threshold and consistent switching behavior across production lots and temperature extremes.
V_I(off) ≤ −0.4 V	Guaranteed off-state input voltage prevents false triggering from noise or leakage in low-voltage logic interfaces.

Applications

Automotive Lighting Control

Industrial PLC Output Stage

Use Scenario: Switching 12 V LED headlamp modules in vehicle body control units.

IC Role / Device Role / Timing Role: PNP RET acts as high-side load switch, sinking current from LED cathodes to ground upon MCU GPIO activation.

Use Value: Eliminates need for external base resistor network and improves EMI immunity via controlled edge rates and integrated bias stability.

Use Scenario: Driving 24 V DC solenoid valves in factory automation I/O modules.

IC Role / Device Role / Timing Role: Digital output driver providing −500 mA sink capability with fast turn-off and robust overvoltage protection.

Use Value: Reduces component count per channel by two resistors and simplifies layout in space-constrained DIN-rail mounted controllers.

Microcontroller GPIO Expander

Consumer Appliance Motor Control

Use Scenario: Extending limited GPIO count on ARM Cortex-M0+ MCUs to control multiple indicator LEDs and buzzers.

IC Role / Device Role / Timing Role: Logic-level compatible digital switch translating 3.3 V/5 V outputs into −500 mA capable sink paths.

Use Value: Enables direct interface without level-shifting or additional driver ICs, lowering BoM cost and firmware complexity.

Use Scenario: Controlling small brushed DC motors (e.g., HVAC blower fans) in white goods using PWM signals.

IC Role / Device Role / Timing Role: PWM-controlled current sink managing motor phase current up to −500 mA with minimal thermal rise.

Use Value: Maintains <300 mV V_CE(sat) at rated current, limiting power loss to <150 mW and avoiding derating below 85 °C ambient.

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
PDTB123ET-Q	Same SOT23 package and R1/R2 values, but rated for −100 mA I_O (vs. −500 mA); lower P_tot (200 mW).	Suitable only for low-current signal routing (e.g., logic buffering), not load switching above 100 mA.	Select when board space is constrained and load current remains ≤100 mA - reduces cost where full 500 mA capability is unnecessary.
BC807-40	Discrete PNP BJT without integrated resistors; requires external R_B; h_FE = 250–630 (vs. fixed bias behavior); no AEC-Q101 qualification.	Used in non-automotive consumer designs where bias tuning and higher gain are preferred over integration and qualification.	Choose only if precise h_FE control or thermal design flexibility outweighs BOM reduction and automotive compliance requirements.

Compared with PDTB123ET-Q, the PDTB123YT-Q provides five times higher output current and AEC-Q101 qualification; compared with BC807-40, it trades manual bias design for guaranteed switching thresholds and reduced assembly steps - ideal for high-reliability, high-volume automotive and industrial control.

Availability

PDTB123YT-QR is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC output stages, microcontroller GPIO expansion, and consumer appliance motor control requiring stable component supply and AEC-Q101-compliant sourcing.

Supply support for PDTB123YT-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 semiconductor expert focused on essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The PDTB123YT-QR belongs to Nexperia's AEC-Q101-qualified Resistor-Equipped Transistor (RET) product line, engineered to replace discrete BJT + resistor combinations in digital switching applications where space, cost, and qualification are critical.

FAQ

What is the maximum allowable ambient temperature for continuous operation?

The PDTB123YT-QR is rated for continuous operation from −65 °C to +150 °C ambient temperature. At full −500 mA load, thermal derating begins above +85 °C ambient due to its 500 K/W junction-to-ambient thermal resistance on standard FR4 PCB; actual usable temperature depends on copper area and airflow.

Can this device be used in high-frequency PWM applications?

Yes - with a typical collector capacitance of 11 pF and fast VI(on)/VI(off) transitions, the PDTB123YT-QR supports PWM switching up to 100 kHz in load-driving applications. However, switching losses increase above 50 kHz due to finite V_CE(sat) recovery time; layout must minimize parasitic inductance at collector and emitter nodes.

Is the marking code "%7Y" unique to this variant?

Yes - "%7Y" is the standardized top-side marking for PDTB123YT-QR per Table 4, where "%" is a placeholder for manufacturing site code and "7Y" identifies the specific device variant. This marking is distinct from PDTB123ET-Q ("7X") and NPN complement PDTD123YT-Q ("6Y").

How does the R2/R1 ratio affect circuit behavior?

The 4.55 typ. R2/R1 ratio sets the internal feedback that stabilizes base current and ensures predictable turn-on even with wide h_FE variation. It results in VI(on) ≈ −1.0 V and VI(off) ≈ −0.6 V, enabling robust noise margin against 3.3 V/5 V logic levels without external pull-downs or Schmitt triggers.

PDTB123YT-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP - Pre-Biased

Current - Collector (Ic) (Max):: 500 mA

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

Resistor - Base (R1):: 2.2 kOhms

Resistor - Emitter Base (R2):: 10 kOhms

DC Current Gain (hFE) (Min) @ Ic, Vce:: 70 @ 50mA, 5V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 2.5mA, 50mA

Current - Collector Cutoff (Max):: 500nA

Frequency - Transition:: -

Power - Max:: 250 mW

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PDTB123YT-QR FAQ

1.How can I place an order for PDTB123YT-QR through Aetrix?

Please submit a Request for Quotation (RFQ) for PDTB123YT-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 PDTB123YT-QR reliable?

The price and inventory of PDTB123YT-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PDTB123YT-QR is usually 5 days.

3.What payment methods are accepted for PDTB123YT-QR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PDTB123YT-QR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PDTB123YT-QR?

PDTB123YT-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PDTB123YT-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 PDTB123YT-QR?

For technical support, including PDTB123YT-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PDTB123YT-QR requirements.

6.How does Aetrix verify that PDTB123YT-QR is sourced from the original manufacturer or authorized distributors?

All PDTB123YT-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 PDTB123YT-QR meets industry standards.

7.What is the process for return or replacement of PDTB123YT-QR?

All PDTB123YT-QR units undergo pre-shipment inspection (PSI). If there is an issue with PDTB123YT-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 PDTB123YT-QR part is unused and in its original packaging.

Return procedure for PDTB123YT-QR:

1.Submit a request within 90 days.

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

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