Nexperia USA Inc. PDTC143XQCZ

Overview

PDTC143XQC from Nexperia is a 50 V, 100 mA NPN resistor-equipped transistor (RET) in a DFN1412D-3 (SOT8009) leadless SMD package with side-wettable flanks. It integrates 4.7 kΩ input bias resistor (R1) and 10 kΩ pull-down resistor (R2), enabling direct digital logic interface without external components. It delivers 100 mA output current with 100 mV V_CE(sat) at I_C = 10 mA / I_B = 0.5 mA, and is used for IC input control and low-power load switching in space-constrained consumer and industrial PCBs.

For engineers reviewing the PDTC143XQC datasheet, PDTC143XQC pinout, PDTC143XQC application, or PDTC143XQC equivalent, this part serves as a drop-in replacement for BC847-based digital switch circuits-offering reduced BOM count, AOI-compatible solder joints, and validated thermal performance up to 150 °C junction temperature on standard FR4 PCBs.

Technical Context

This RET implements an integrated NPN bipolar transistor with two monolithically embedded thin-film resistors: R1 between base and input terminal, and R2 between base and emitter. The internal topology eliminates discrete base bias networks while maintaining predictable DC current gain (h_FE = 50 min at V_CE = 5 V, I_C = 10 mA) and tight saturation voltage control.

Its DFN1412D-3 package features side-wettable flanks for automated optical inspection of solder joints, 0.5 mm max height, and 0.8 mm pitch. Thermal resistance is 348 K/W (junction-to-ambient, 35 µm copper FR4), supporting continuous operation at full rated current under ambient temperatures up to 125 °C.

Key Specifications

Pinout & Package

PDTC143XQC uses the DFN1412D-3 (SOT8009) plastic leadless package: 1.4 mm × 1.2 mm body, 0.48 mm height, 0.8 mm pin pitch, and side-wettable flanks for solder-joint inspection. Package outline complies with JEDEC MO-340CA.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC123JQC, PDTC143XQC provides higher output current headroom and lower saturation voltage; compared with BC847B, it reduces component count and improves manufacturability-making it optimal for cost-sensitive, high-volume digital switching where fixed bias is acceptable.

Availability

PDTC143XQC is available at Aetrix Electronics and suitable for LED indicator control, microcontroller GPIO expansion, low-power relay driving, and digital input conditioning requiring stable component supply across consumer electronics, industrial controls, and IoT edge devices.

Supply support for PDTC143XQC 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 high-volume, high-reliability essential semiconductors-including logic, discretes, MOSFETs, and analog devices-for automotive, industrial, mobile, and computing markets.

PDTC143XQC 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, board space, and assembly cost without sacrificing performance or reliability.

FAQ

What is the maximum continuous collector current for PDTC143XQC?

PDTC143XQC is rated for 100 mA continuous collector current (I_O) under standard conditions (T_amb ≤ 25 °C, FR4 PCB with 35 µm copper). Derating applies above 25 °C per Figure 1 in the datasheet: at 100 °C ambient, maximum usable current drops to ~60 mA to maintain T_j ≤ 150 °C.

Can PDTC143XQC be used with 3.3 V logic inputs?

Yes. PDTC143XQC has a typical VI(on) of 1.5–2.5 V and VI(off) of 0.3–0.8 V, providing guaranteed turn-on with 3.3 V CMOS outputs (which typically swing >2.4 V high) and solid turn-off with <0.4 V low states. Its built-in R1/R2 ratio ensures robust noise margin in mixed-voltage systems.

Does PDTC143XQC require a heatsink in typical applications?

No. With a thermal resistance of 348 K/W (junction-to-ambient, 35 µm FR4), PDTC143XQC dissipates only 10 mW at I_C = 10 mA and V_CE(sat) = 100 mV-resulting in <3.5 °C junction rise above ambient. Heatsinking is unnecessary unless operating continuously near 100 mA at elevated ambient temperatures (>85 °C).

How does the DFN1412D-3 package support automated optical inspection (AOI)?

The DFN1412D-3 package features side-wettable flanks-exposed copper surfaces along the vertical edges of each terminal. During reflow, solder wicks up these flanks, creating visible fillets that AOI systems can image and analyze for solder volume, alignment, and bridging-enabling 100% inline quality verification without X-ray.