Nexperia USA Inc. PDTA144EQBZ

Overview

PDTA144EQB from Nexperia is a 50 V, 100 mA PNP resistor-equipped transistor (RET) in a DFN1110D-3 (SOT8015) leadless SMD package with side-wettable flanks. It integrates R1 = 47 kΩ and R2 = 47 kΩ bias resistors, delivers hFE ≥ 80 at IC = −5 mA, achieves VCEsat ≤ −100 mV at IC = −10 mA/IB = −0.5 mA, and supports −40 °C to +150 °C operation - used for digital load switching and IC input control in space-constrained consumer and industrial PCBs.

For engineers reviewing the PDTA144EQB datasheet, PDTA144EQB pinout, PDTA144EQB application, or PDTA144EQB equivalent, this page provides verified electrical parameters, validated pin functions, confirmed use cases in digital logic interfacing and low-power switching, and real-world alternative part comparisons - all derived from Nexperia's official Rev. 1 product data sheet dated 28 September 2021.

Technical Context

This PNP RET integrates two matched 47 kΩ on-chip resistors (R1 = R2) to form a built-in voltage divider that biases the base, eliminating external components. Its simplified three-terminal structure (Input/Base, GND/Emitter, Output/Collector) enables direct connection between microcontroller GPIOs and switched loads without discrete biasing networks.

The device operates as a saturated switch with guaranteed VCEsat ≤ −100 mV under defined drive conditions and exhibits VI(on) = −3.0 V to −1.6 V (typ.) at IC = −2 mA, ensuring reliable turn-on across temperature. Its 0.48 mm profile and side-wettable flanks support AOI-compatible reflow assembly on high-density boards.

Key Specifications

Pinout & Package

DFN1110D-3 (SOT8015) is a 3-terminal, leadless, ultra-thin surface-mount plastic package measuring 1.1 mm × 1.0 mm × 0.48 mm, featuring side-wettable flanks for solder joint inspection and a 0.65 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTC144EQB, PDTA144EQB enables high-side switching with non-inverted logic, while versus BC857BW it reduces bill-of-materials and improves manufacturability - making it optimal for compact, cost-sensitive digital interface designs requiring minimal external components.

Availability

PDTA144EQB is available at Aetrix Electronics and suitable for LED indicator control, digital logic level translation, low-power relay driving, and microcontroller GPIO load switching requiring stable component supply across production ramps and long-life industrial programs.

Supply support for PDTA144EQB 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-enhancing components including logic, discrete, and MOSFET devices, serving automotive, industrial, and consumer markets with high-volume manufacturing and reliability leadership.

PDTA144EQB belongs to Nexperia's resistor-equipped transistor (RET) family, engineered specifically to simplify digital interface design by integrating precision biasing resistors into miniature leadless packages for space- and cost-constrained applications.

FAQ

What is the maximum continuous collector current for PDTA144EQB?

The maximum continuous collector current is −100 mA at Tamb ≤ 25 °C on a standard FR4 PCB with 35 µm copper. Derating applies above 25 °C per Figure 1 in the datasheet, reaching ~60 mA at 100 °C ambient. This rating assumes proper PCB thermal relief and no localized hot spots.

Can PDTA144EQB replace BC857 series transistors directly?

Yes - PDTA144EQB is explicitly positioned as a cost-saving alternative to BC857 series in digital applications. It matches BC857's voltage/current ratings and SOT323 footprint compatibility (via adapter layout), while eliminating two external base resistors and enabling AOI-capable assembly.

What is the function of the side-wettable flanks in the SOT8015 package?

Side-wettable flanks expose solderable metal along the package edges, allowing automated optical inspection (AOI) systems to verify solder joint quality and fillet formation without X-ray. This feature improves process control in high-reliability SMT lines and reduces post-reflow defect escapes.

How does the built-in resistor ratio affect switching behavior?

With R1 = R2 = 47 kΩ, the internal voltage divider sets a fixed base bias point that ensures consistent turn-on threshold (VI(on) = −3.0 V to −1.6 V) and prevents latch-up during fast digital transitions. The 1:1 ratio optimizes noise immunity and reduces sensitivity to supply ripple compared to asymmetric RET configurations.