NXP Semiconductors PDTA124EMB,315

Overview

PDTA124EMB,315 from Nexperia is a PNP digital transistor with integrated 22 kΩ base resistor (R1), 22 kΩ emitter resistor (R2), and ESD protection (IEC 61000-4-2 level 4). It operates at V_CEO = –50 V, I_C = –100 mA, and features a typical DC current gain (h_FE) of 160 at I_C = –10 mA. Used in low-voltage logic interface and LED driver circuits in consumer electronics.

For engineers reviewing the PDTA124EMB,315 datasheet, PDTA124EMB,315 pinout, PDTA124EMB,315 application, or PDTA124EMB,315 equivalent, key selection criteria include integrated bias resistors, ESD rating, switching speed (t_f = 25 ns), saturation voltage (V_CE(sat) = –100 mV at I_C = –50 mA), and SOT-323 package compatibility with space-constrained PCB layouts.

Technical Context

This device integrates two precision thin-film resistors (R1 = R2 = 22 kΩ ±10%) directly into the PNP bipolar die structure, eliminating external bias components for inverter or switch configurations. Its ESD protection diode network clamps transient voltages to ±8 kV contact / ±15 kV air per IEC 61000-4-2 Level 4.

The transistor exhibits guaranteed switching performance with t_on ≤ 110 ns and t_off ≤ 120 ns at I_C = –50 mA, V_CC = –10 V, and R_B = 10 kΩ, supporting reliable 1 MHz digital signal routing in portable power management subsystems.

Key Specifications

Pinout & Package

Supplied in SOT-323 (SC-70) plastic surface-mount package, measuring 2.2 × 2.3 × 1.1 mm with gull-wing leads. Standard JEDEC MO-203AC outline, compatible with reflow soldering per IPC/JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital transistor applications.

Compared with PDTA124EE,115, PDTA124EMB,315 adds certified ESD protection without increasing size or cost; compared with PDTC124EM,315, it offers correct pinout alignment for new designs targeting simplified layout and guaranteed ESD resilience.

Availability

PDTA124EMB,315 is available at Aetrix Electronics and suitable for LED driver circuits, logic-level translation, microcontroller interface, and power sequencing control requiring stable component supply and guaranteed ESD immunity.

Supply support for PDTA124EMB,315 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 PDTA series belongs to Nexperia's Automotive-Qualified Digital Transistor product line, designed specifically for space-constrained, ESD-sensitive digital interface and load-switching applications in portable and IoT endpoints.

FAQ

What is the maximum operating temperature for PDTA124EMB,315?

The device is qualified for operation from –65°C to +150°C junction temperature. Thermal resistance R_th(j–amb) is 375 K/W in SOT-323 on 100 mm² 1-oz copper pad, enabling 100 mA continuous current at ambient temperatures up to +85°C without derating.

Can PDTA124EMB,315 replace a standard PNP transistor like BC807 in existing designs?

No - PDTA124EMB,315 has integrated base-emitter resistors and fixed pinout (Emitter/Base/Collector = Pin 1/2/3), unlike BC807 which requires external biasing and uses different pin assignment. Direct replacement would require schematic and layout changes.

Is the 22 kΩ resistor tolerance critical for switching threshold stability?

Yes - the ±10% tolerance on both R1 and R2 ensures predictable V_BE bias and consistent turn-on voltage (V_IN ≈ 1.1 V) across production lots, maintaining <5% variation in I_C at nominal drive conditions.

Does PDTA124EMB,315 support PWM dimming of LEDs at 5 kHz?

Yes - with t_on/t_off ≤ 120 ns and no storage-time limitation, the device fully switches at 5 kHz (200 µs period) with <0.1% dead-time impact, preserving PWM linearity and minimizing thermal stress on the LED load.