Nexperia USA Inc. PUMH9,125

Overview

PUMH9 from Nexperia is a dual NPN resistor-equipped transistor (RET) in SOT363-3 (SC-88) package, integrating two matched NPN transistors with built-in bias resistors R1 = 10 kΩ and R2 = 47 kΩ. It delivers 100 mA per transistor, supports 50 V V_CEO, and operates across −55 °C to +150 °C ambient, enabling compact digital switching in space-constrained automotive control modules.

For engineers reviewing the PUMH9 datasheet, PUMH9 pinout, PUMH9 application, or PUMH9 equivalent, this device serves as a drop-in replacement for discrete BC847-based driver stages-reducing BOM count, simplifying PCB layout, and lowering assembly cost in logic-level interface and load-switching circuits.

Technical Context

The PUMH9 integrates two independent NPN transistors, each with dedicated base bias networks: R1 (10 kΩ) connects input to base, R2 (47 kΩ) connects base to emitter, forming a classic single-resistor-biased configuration with fixed R2/R1 ratio of 4.7. Each transistor operates with open-base V_CEO = 50 V and I_O = 100 mA rating under T_amb ≤ 25 °C.

No internal connection exists between the two transistor sections beyond shared ground pins (Pin 1 and Pin 4); they are electrically isolated except for common GND reference. Thermal resistance is 417 K/W per device on FR4 PCB, supporting stable operation up to 150 °C junction temperature.

Key Specifications

Pinout & Package

SOT363-3 (TSSOP6) plastic surface-mount package: 1.3 mm × 2.2 mm footprint, 0.65 mm pitch, 0.45 mm max height, 6-pin transparent top view with pin 1 index marker.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847BPDW1T3G, PUMH9 reduces bill-of-materials and layout area at the cost of fixed bias; versus PUMD9, it provides matched NPN characteristics essential for parallel load switching without polarity mismatch.

Availability

PUMH9 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.

Supply support for PUMH9 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 essential semiconductors-including logic, discretes, MOSFETs, and ESD protection devices.

PUMH9 belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered specifically to replace discrete transistor-resistor combinations in cost-sensitive, space-constrained digital interface applications.

FAQ

What is the maximum continuous current per transistor in PUMH9?

The PUMH9 supports 100 mA continuous output current per transistor under T_amb ≤ 25 °C with standard FR4 PCB mounting. Derating applies above 25 °C ambient-power dissipation drops linearly to zero at 150 °C ambient per the 417 K/W thermal resistance curve.

Can PUMH9 be used in place of BC847-based circuits without redesign?

Yes-PUMH9 replaces two BC847 transistors plus four bias resistors in typical digital switch configurations. Its pinout maps directly to common SOT-363 layouts, and built-in R1/R2 values (10 kΩ/47 kΩ) match standard TTL/CMOS drive requirements for reliable saturation at 3.3 V or 5 V logic levels.

Is PUMH9 qualified for automotive applications?

PUMH9 is not AEC-Q101 qualified per its official Nexperia documentation. While it operates across −55 °C to +150 °C and is used in automotive body modules, it lacks formal qualification testing for vibration, humidity, and lifetime reliability per automotive standards.

How does the R2/R1 ratio affect switching behavior?

The R2/R1 ratio of 4.7 establishes negative feedback that stabilizes the transistor's DC operating point against β variation and temperature drift. This ensures consistent V_CE(sat) < 100 mV and prevents thermal runaway during sustained conduction-critical for reliable LED or relay drive.