Nexperia USA Inc. PUMD9-QZ

Overview

PUMD9-QZ from Nexperia is an AEC-Q101-qualified NPN/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 serves as a compact, automotive-grade digital switching pair for level translation and IC input control in space-constrained PCBs.

For engineers reviewing the PUMD9-QZ datasheet, PUMD9-QZ pinout, PUMD9-QZ application, or PUMD9-QZ equivalent, this device is selected for dual-polarity discrete logic interfacing where reduced component count, simplified biasing, and automotive reliability are critical - especially when replacing BC847-Q/BC857-Q pairs in cost-sensitive digital control nodes.

Technical Context

The PUMD9-QZ integrates two complementary silicon transistors - TR1 (NPN) and TR2 (PNP) - each with monolithically embedded base bias networks. TR1 features h_FE ≥ 100 at I_C = 5 mA, V_CE = 5 V; TR2 delivers comparable gain under negative polarity conditions (V_CE = −5 V), enabling bidirectional signal conditioning without external resistors.

Its internal R1–R2 network sets fixed input impedance and current gain ratio (R2/R1 = 4.7 typ), supporting predictable saturation behavior: V_CE(sat) ≤ 100 mV at I_C = 5 mA / I_B = 0.25 mA (TR1) and ≤ 100 mV at I_C = −5 mA / I_B = −0.25 mA (TR2), ensuring low-loss switching in 3.3 V and 5 V logic domains.

Key Specifications

Pinout & Package

Package: SOT363-3 (TSSOP6), ultra-small surface-mount plastic package with 0.65 mm lead pitch, optimized for high-density automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PUMH9-Q and PUMB9-Q, the PUMD9-QZ uniquely provides matched NPN/PNP pairing in one die, enabling true complementary output generation - essential for push-pull drivers, H-bridge pre-drivers, and bidirectional interface circuits where polarity diversity is mandatory.

Availability

PUMD9-QZ is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input stages, LED driver subsystems, and microcontroller GPIO expansion requiring stable component supply and AEC-Q101 compliance.

Supply support for PUMD9-QZ 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.

The PUMD9-QZ belongs to Nexperia's RESISTOR-EQUIPPED TRANSISTOR (RET) product line, engineered specifically for automotive and industrial digital interface simplification - reducing design complexity while meeting stringent AEC-Q101 stress requirements.

FAQ

What is the maximum operating junction temperature for PUMD9-QZ?

The absolute maximum junction temperature (T_j) is 150 °C, validated per IEC 60134 limiting values. Derating begins above 25 °C ambient, with total device power dissipation dropping linearly to zero at 150 °C ambient - confirmed by Figure 1 in the datasheet using standard FR4 PCB mounting conditions.

Can PUMD9-QZ be used in 5 V logic systems without external level shifters?

Yes. Its VI(on) range (0.8–1.4 V) and VI(off) (≤0.5 V) align with standard 5 V TTL and CMOS logic thresholds. The integrated R1 resistor allows direct connection to 5 V MCU GPIO pins, eliminating external base resistors while ensuring reliable saturation and cutoff.

How does the R2/R1 ratio affect switching performance?

The R2/R1 ratio of 4.7 defines the internal current gain scaling between input and output stages. This fixed ratio ensures consistent h_FE-effective behavior across temperature and process variation, delivering repeatable V_CE(sat) and switching speed without tuning - critical for production stability in automotive applications.

Is PUMD9-QZ pin-compatible with BC847-Q/BC857-Q discrete pairs?

No - it uses a 6-pin SOT363-3 package with shared ground pins and interleaved I/O terminals, unlike the individual SOT23 packages of BC847-Q/BC857-Q. However, its functional replacement value lies in circuit simplification: one PUMD9-QZ replaces two transistors + four resistors, requiring board layout redesign but delivering higher reliability and smaller area.