Nexperia USA Inc. PDTD113ZUX

Overview

PDTD113ZUX from Nexperia is a 500 mA, 50 V NPN resistor-equipped transistor (RET) in SOT323 (SC-70) package, integrating 1 kΩ input bias resistor (R1) and 10 kΩ base-emitter resistor (R2) with ±10% ratio tolerance. It functions as a digitally controlled switch in low-voltage logic interfaces, supports AEC-Q101 automotive qualification, and operates reliably up to 175 °C ambient temperature.

For engineers reviewing the PDTD113ZUX datasheet, PDTD113ZUX pinout, PDTD113ZUX application, or PDTD113ZUX equivalent, key selection criteria include its 10 kΩ R2 value enabling higher VI(off) threshold (0.3–1.0 V), 70× DC current gain at 50 mA, 100 mV VCEsat, and compatibility with 3.3 V/5 V microcontroller I/O drive without external biasing.

Technical Context

This RET integrates a monolithic NPN transistor with two precision on-die resistors: R1 (1 kΩ) connects input to base, R2 (10 kΩ) shunts base to emitter - forming a fixed-current bias network that eliminates discrete resistor placement. Its 1:10 R2/R1 ratio yields high noise immunity and stable turn-off behavior under weak drive conditions.

The device delivers 500 mA output current with 100 mV saturation voltage at IC = 50 mA / IB = 2.5 mA, supports 50 V collector-emitter breakdown, and maintains operation across −55 °C to +175 °C ambient range - validated per AEC-Q101 stress test requirements for automotive under-hood applications.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: 1.3 mm × 1.8 mm × 0.95 mm body, 3-terminal leadframe, tin-plated terminations compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTD113EU, PDTD113ZUX offers superior noise rejection and lower base current demand due to its 10× R2 value, while BC807-40 demands additional passives and lacks AEC-Q101 validation - making PDTD113ZUX optimal for space-constrained, automotive-grade digital switching where reliability and simplicity are prioritized.

Availability

PDTD113ZUX is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC outputs, and medical diagnostic equipment requiring stable component supply with AEC-Q101 compliance and high-temperature operation.

Supply support for PDTD113ZUX 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 semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

PDTD113ZUX belongs to the PDTD1xxxU series of resistor-equipped transistors designed specifically for simplified digital switching in space- and reliability-critical applications - emphasizing reduced BOM count, AEC-Q101 qualification, and extended temperature operation.

FAQ

What is the maximum allowable input voltage (VI) for PDTD113ZUX?

The absolute maximum input voltage is −5 V to +10 V, as specified in Table 6 of the datasheet. Exceeding +10 V risks damaging the internal R1 resistor or base-emitter junction. For reliable 3.3 V or 5 V logic interfacing, VI remains well within safe operating limits, with VI(on) typ 0.8 V and VI(off) max 1.0 V ensuring clean switching thresholds.

Can PDTD113ZUX replace a standard BJT like BC817 in existing designs?

Yes, with layout adaptation: PDTD113ZUX replaces BC817 plus its two external bias resistors. Pin 1 becomes the logic input (no resistor needed), Pin 2 is emitter (GND), Pin 3 is collector (load connection). No changes to load configuration are required, but verify that the 70× hFE and 100 mV VCEsat meet your drive and power loss targets.

Is thermal derating required when operating above 25 °C ambient?

Yes - total power dissipation drops linearly from 300 mW at 25 °C to zero at 175 °C ambient (derating slope: 2.22 mW/°C on single-layer FR4 PCB). At 100 °C ambient, maximum allowed power is ~133 mW. Use the 4-layer PCB derating curve (425 mW at 25 °C) if board stack-up permits improved thermal performance.

Does PDTD113ZUX support PWM switching of inductive loads?

Yes - its 50 V VCEO rating and built-in base-emitter resistor (R2) provide inherent flyback protection by accelerating turn-off and limiting reverse base voltage during inductive kickback. For high-frequency (>10 kHz) or high-energy loads, add an external flyback diode across the load to clamp voltage spikes beyond 50 V.