Nexperia USA Inc. PDTB123EUF

Overview

PDTB123EUF from Nexperia is a PNP resistor-equipped transistor (RET) in SOT323 (SC-70) package, designed for digital switching applications with built-in bias resistors R1 = 2.2 kΩ and R2 = 2.2 kΩ, −50 V V_CEO, −500 mA I_O, and AEC-Q101 qualification for automotive use.

For engineers reviewing the PDTB123EUF datasheet, PDTB123EUF pinout, PDTB123EUF application, or PDTB123EUF equivalent, this device serves as a space- and BOM-optimized replacement for discrete base-resistor transistor configurations in logic-level interface, load switching, and automotive body electronics where simplified drive and high-temperature operation up to 175 °C are required.

Technical Context

This RET integrates a PNP bipolar transistor with two monolithically embedded silicon resistors: R1 (base input resistor) and R2 (base-emitter feedback resistor), enabling direct connection to CMOS/TTL logic without external bias components. The 1:1 R2/R1 ratio (±10 % tolerance) ensures stable saturation behavior under varying temperature and supply conditions.

It operates with guaranteed performance across −55 °C to +175 °C ambient, supports ≤−12 V input voltage swing, delivers ≤−100 mV V_CE(sat) at I_C = −50 mA / I_B = −2.5 mA, and maintains h_FE ≥ 40 at V_CE = −5 V, making it suitable for robust low-side switching in harsh environments.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mounted package: ultra-compact 3-pin outline with 0.65 mm pitch, 1.3 × 1.75 mm footprint, and 0.95 mm height - optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PDTB123YU, PDTB123EUF provides matched R1/R2 for predictable logic thresholds, while versus BC807-40 it delivers verified BOM reduction, smaller footprint, and guaranteed AEC-Q101 compliance-making it optimal for production-ready automotive and industrial switching.

Availability

PDTB123EUF is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, consumer appliance power sequencing, and medical diagnostic equipment interface requiring stable component supply and AEC-Q101 assurance.

Supply support for PDTB123EUF 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, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The PDTB1xxxU series targets cost-sensitive, space-constrained digital switching applications where integration, qualification, and thermal resilience are critical - specifically engineered to replace legacy discrete BJT + resistor combinations in automotive and industrial control.

FAQ

What is the maximum allowable input voltage for PDTB123EUF?

The absolute maximum input voltage (V_I) is −12 V (negative-going) and +10 V (positive-going), per Table 6. Exceeding −12 V risks damaging the internal R1 resistor or base-emitter junction. For 5 V logic interfaces, the device operates safely within its −1.0 V to −1.5 V VI(on) range, ensuring robust turn-on without overstress.

Can PDTB123EUF replace BC807-40 in existing designs without layout changes?

No - PDTB123EUF uses SOT323 (SC-70) package with 0.65 mm pin pitch, while BC807-40 is typically in SOT23 (1.9 mm pitch). Direct footprint substitution is not possible. However, redesigning the pad layout for SOT323 yields 40 % smaller area and eliminates two external resistors, resulting in net BOM and assembly cost reduction.

How does the R2/R1 ratio affect switching behavior?

With R2/R1 = 1.0 ± 10 %, the device delivers tightly controlled base current division, ensuring consistent saturation and predictable VI(on)/VI(off) thresholds across temperature and process variation. This eliminates the gain drift and thermal runaway risks common in discrete resistor-biased BJTs, especially in automotive under-hood environments.

Is thermal derating required above 25 °C ambient?

Yes - total power dissipation drops from 300 mW at T_amb = 25 °C to zero at 175 °C, per Figure 1. On a standard FR4 PCB (single-sided copper), R_th(j-a) = 500 K/W. At 100 °C ambient, maximum continuous I_O must be reduced to ~350 mA to maintain T_j ≤ 175 °C, assuming typical V_CE(sat) and duty cycle.