Nexperia USA Inc. PDTD123YQAZ

Overview

PDTD123YQAZ from Nexperia is a 50 V, 500 mA NPN resistor-equipped transistor (RET) in a DFN1010D-3 (SOT1215) package, integrating 2.2 kΩ input bias resistor (R1) and 10 kΩ feedback resistor (R2). It functions as a single-chip digital switch for logic-level signal translation and load control in space-constrained PCBs, with AEC-Q101 qualification for automotive body electronics.

For engineers reviewing the PDTD123YQAZ datasheet, PDTD123YQAZ pinout, PDTD123YQAZ application, or PDTD123YQAZ equivalent, this device serves as a drop-in replacement for discrete BJT + resistor networks in low-voltage digital interface circuits requiring guaranteed turn-on/turn-off thresholds, thermal robustness up to 150 °C junction temperature, and AOI-compatible solder joints.

Technical Context

This RET integrates an NPN silicon transistor with two monolithically embedded thin-film resistors-R1 connected between base and input pin, R2 between base and emitter-enabling direct TTL/CMOS drive without external bias components. Its 4-pin DFN layout places dual collector terminals (pins 3 and 4) in parallel to support 500 mA continuous output current while maintaining ultra-low profile (0.37 mm height).

The device operates with VI(on) = 0.5–1.0 V (typ.) at IC = 20 mA and VI(off) = 0.4–1.0 V (typ.) at IC = 100 µA, ensuring clean digital switching across −40 °C to +150 °C ambient. Built-in ±10% resistor ratio tolerance (R2/R1 = 4.55 typ.) guarantees consistent gain and saturation behavior independent of external component variation.

Key Specifications

Pinout & Package

DFN1010D-3 (SOT1215) is a leadless, thermally enhanced ultra-thin surface-mount package measuring 1.1 × 1.0 × 0.37 mm, with visible and solderable side pads for automated optical inspection (AOI) and high-reliability reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTB123YQA, PDTD123YQAZ offers complementary polarity for low-side switching, while BC807-40 demands external biasing-increasing design complexity and board area-making PDTD123YQAZ optimal for cost-sensitive, space-constrained digital interface applications.

Availability

PDTD123YQAZ is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer wearable power management, and computing peripheral control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PDTD123YQAZ 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-performance discrete, logic, and power MOSFET semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.

This part belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered specifically to replace discrete BJT-resistor combinations in digital switching applications-reducing design time, PCB area, and assembly cost while maintaining AEC-Q101 reliability.

FAQ

What is the maximum continuous collector current for PDTD123YQAZ?

The maximum continuous collector current is 500 mA, verified under standard FR4 PCB mounting conditions with 4-layer copper and 1 cm² collector pad (Ptot = 940 mW at Tamb = 25 °C). Derating applies above 25 °C ambient per Figure 2 in the datasheet, reaching zero at 150 °C junction temperature.

Can PDTD123YQAZ be used as a direct replacement for BC817-40 in digital switching circuits?

Yes-it serves as a functional and pin-compatible upgrade: both handle 500 mA and 50 V, but PDTD123YQAZ integrates R1 = 2.2 kΩ and R2 = 10 kΩ, eliminating two external resistors. VI(on) and VI(off) thresholds are optimized for TTL/CMOS drive, whereas BC817 requires manual bias design and lacks AEC-Q101 qualification.

How does the dual-collector configuration (pins 3 and 4) improve thermal performance?

Pins 3 and 4 are internally shorted collector terminals, effectively doubling the copper cross-section for current conduction and heat spreading. This reduces thermal resistance from junction to solder point (Rth(j-sp) = 40 K/W) and allows higher sustained current in thermally constrained layouts-verified by 575 mW power dissipation on single-layer FR4 with 1 cm² pad.

Is the marking code "10 00 11" on PDTD123YQAZ traceable to date code or lot information?

Yes-the 6-digit binary marking "10 00 11" corresponds to the type-specific code for PDTD123YQA per Table 5. Per Figure 1, it encodes vendor ID, year, and date code in a standardized format readable under magnification; full decoding requires Nexperia's internal marking guide, but the code uniquely identifies this variant within the PDTD113Z/123Y/143XQA series.