Nexperia USA Inc. PEMH24,115

Overview

PEMH24 from Nexperia (formerly Philips Semiconductors) is a dual NPN resistor-equipped transistor (RET) in SOT666 package, featuring integrated 100 kΩ input bias resistors (R1 = R2) and unity R2/R1 ratio. It delivers 20 mA DC output current with 50 V collector-emitter breakdown voltage and 150 mV saturation voltage at IC = 5 mA/IB = 0.25 mA, used for digital logic interfacing and low-current peripheral driving in space-constrained PCBs.

For engineers reviewing the PEMH24 datasheet, PEMH24 pinout, PEMH24 application, or PEMH24 equivalent, key selection criteria include its dual-NPN topology with matched bias resistors, SOT666 thermal performance (Rth(j-a) = 416 K/W per device), DC current gain (hFE ≥ 80 at IC = 5 mA), and compatibility with reflow-only assembly on FR4 boards.

Technical Context

The PEMH24 integrates two independent NPN transistors with monolithically embedded base bias networks-each with 100 kΩ R1 (base-to-V_IN) and 100 kΩ R2 (base-to-emitter)-enabling direct TTL/CMOS-level input drive without external resistors. Its dual-emitter-grounded configuration supports parallel or cascaded switching in compact logic interface circuits.

Designed for digital signal conditioning, it operates with VI(on) = 1.5–3 V and VI(off) = 0.5–1.1 V across −40 °C to +100 °C ambient, maintaining stable hFE and VCEsat while limiting leakage (ICEO ≤ 1 µA at 25 °C, ≤ 50 µA at 150 °C junction).

Key Specifications

Pinout & Package

SOT666 plastic surface-mounted package (6-lead, 1.7 × 1.3 mm footprint), optimized for high-density routing and automated placement. Pin 1 index located at top-left corner per JEDEC MO-213AA outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-NPN RET applications.

Compared with PUMH24, PEMH24 offers better thermal performance in high-density layouts; compared with EMH24, it shares identical functionality but has reached end-of-life-EMH24 provides guaranteed supply continuity and enhanced reliability screening.

Availability

PEMH24 is available at Aetrix Electronics and suitable for LED indicator drivers, microcontroller GPIO expansion, logic-level signal inversion, and IC input control interfaces requiring stable component supply and long-term obsolescence management.

Supply support for PEMH24 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, formerly Philips Semiconductors, is a global leader in discrete, logic, and MOSFET solutions, specializing in high-volume, high-reliability semiconductor components for automotive, industrial, and consumer markets.

The PEMH24 belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered to replace general-purpose transistors in digital logic interfacing applications where board space, assembly cost, and design simplicity are critical constraints.

FAQ

What is the maximum operating temperature for PEMH24?

The PEMH24 has a maximum junction temperature (T_j) of 150 °C and an ambient operating range of −65 °C to +150 °C. Thermal resistance from junction to ambient is 416 K/W per device on FR4 PCB, so at 25 °C ambient and 300 mW dissipation, junction temperature reaches ~159 °C-requiring derating above 25 °C ambient to stay within limit.

Can PEMH24 be used with 1.8 V logic inputs?

Yes-VI(on) is specified at 1.5 V minimum (typ. 3 V) and VI(off) at 0.5 V maximum (typ. 1.1 V), creating a usable 1.0 V hysteresis window. At 1.8 V, the device reliably saturates with hFE ≥ 80 and VCEsat ≤ 150 mV, making it compatible with 1.8 V, 3.3 V, and 5 V logic families without level shifting.

Is PEMH24 pin-compatible with PUMH24?

No-PEMH24 uses SOT666 (6-pin, 1.7 × 1.3 mm) with pin order GND–IN–OUT–GND–IN–OUT, while PUMH24 uses SC-88/SOT363 (6-pin, 2.2 × 1.35 mm) with different pin mapping. Though functionally identical, mechanical incompatibility prevents direct replacement without PCB redesign.

Does PEMH24 require external pull-down resistors on its inputs?

No-the internal R2 resistor (100 kΩ) connects each base to its respective emitter, providing inherent pull-down functionality. This eliminates need for external resistors to ensure defined off-state behavior, reducing component count and improving noise immunity in floating-input scenarios.