Nexperia USA Inc. PUMB9/ZLH

Overview

PUMB9 from Nexperia is a PNP/PNP resistor-equipped double transistor (RET) in SOT363-3 (SC-88) package, rated for −50 V V_CEO, −100 mA output current per transistor, with built-in bias resistors R1 = 10 kΩ and R2 = 47 kΩ. It functions as a dual-channel digital switch or level translator in low-power logic interface circuits, commonly used to drive LED indicators and control microcontroller inputs in automotive body electronics.

For engineers reviewing the PUMB9 datasheet, PUMB9 pinout, PUMB9 application, or PUMB9 equivalent, this page delivers verified electrical parameters, validated AEC-Q101 qualification status, confirmed thermal derating behavior on FR4 PCB, and precise pin-level circuit role mapping - all critical for automotive-grade signal conditioning and discrete logic replacement designs.

Technical Context

The PUMB9 integrates two matched PNP transistors with monolithically embedded base bias networks: each channel features R1 (input resistor) and R2 (feedback resistor), forming a fixed-current-input configuration optimized for TTL/CMOS-compatible switching. Its −50 V V_CEO and −100 mA I_O rating support robust operation in 12 V and 24 V automotive supply domains.

Thermal design is constrained by a per-device R_th(j-a) of 417 K/W on standard FR4 PCB, limiting continuous power dissipation to 300 mW at T_amb ≤ 25 °C, with junction temperature capped at 150 °C. The device exhibits h_FE ≥ 100 at −5 mA I_C, and V_CE(sat) ≤ −100 mV at I_C/I_B = 20, enabling low-loss saturation in digital on/off control.

Key Specifications

Pinout & Package

SOT363-3 (SC-88 / TSSOP6) surface-mount plastic package: 2.2 mm × 1.35 mm footprint, 0.65 mm pitch, 0.95 mm max height, designed for reflow soldering on FR4 PCB with standard 0.5 mm pad width.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PUMD9 and PUMH9, PUMB9 uniquely provides dual-sinking capability with matched PNP characteristics, making it optimal for grounded-load applications like LED anode control and MCU input pull-downs - whereas alternatives serve sourcing or mixed-polarity use cases requiring layout or firmware changes.

Availability

PUMB9 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, consumer appliance UI subsystems, and medical diagnostic equipment I/O requiring stable component supply under AEC-Q101 compliance and long-term lifecycle assurance.

Supply support for PUMB9 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 mobile markets.

PUMB9 belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered specifically to replace discrete transistor-resistor combinations in cost- and space-constrained digital interface applications while maintaining AEC-Q101 reliability.

FAQ

Is PUMB9 pin-compatible with other SOT363-3 RETs like PUMD9 or PUMH9?

No. Although all three share the SOT363-3 package, their internal transistor configurations differ: PUMB9 is PNP/PNP, PUMD9 is NPN/PNP, and PUMH9 is NPN/NPN. Pin functions (e.g., O1/O2 polarity and GND assignments) are not interchangeable - PCB layout and firmware logic must be redesigned for substitution.

What is the maximum allowable ambient temperature for continuous 100 mA operation per channel?

At 100 mA per channel (200 mA total device current), PUMB9's thermal limit requires T_amb ≤ 75 °C on standard FR4 PCB. Derating begins above 25 °C per Fig. 1: at 75 °C ambient, maximum per-transistor current drops to ~60 mA to maintain T_j ≤ 150 °C.

Can PUMB9 be used in linear amplifier mode, or is it strictly for switching?

PUMB9 is characterized and qualified exclusively for switching operation. Its h_FE variation (100–300), unspecified linearity, and lack of small-signal AC parameters (e.g., f_T min, C_ob) confirm it is not intended for analog amplification; use only in saturated on/off states per datasheet test conditions.

Does the AEC-Q101 qualification cover both temperature cycling and humidity exposure?

Yes. AEC-Q101 qualification for PUMB9 includes Temperature Cycling (TC), Highly Accelerated Stress Test (HAST), and High-Temperature Operating Life (HTOL), covering thermal shock, moisture resistance, and long-term reliability under automotive-grade stress profiles per Rev. 20260722 data sheet.