Nexperia USA Inc. PUMH1-QX

Overview

PUMH1-QX from Nexperia is an NPN/NPN resistor-equipped double transistor (RET) in SOT363-3 (SC-88) package, featuring integrated 22 kΩ input bias resistors per channel, 50 V V_CEO, 100 mA output current capability, and AEC-Q101 qualification for automotive signal conditioning and digital interface control.

For engineers reviewing the PUMH1-QX datasheet, PUMH1-QX pinout, PUMH1-QX application, or PUMH1-QX equivalent, this device serves as a space-optimized, bias-resistor-integrated dual transistor for low-current peripheral driving, IC input control, and replacement of discrete BJT pairs in automotive infotainment and body electronics.

Technical Context

The PUMH1-QX integrates two matched NPN transistors with on-die base bias networks-each with R1 = 22 kΩ (input resistor) and R2/R1 = 1.0 ratio-enabling direct logic-level drive without external bias components. It operates within −55 °C to +150 °C ambient range and supports ≤100 mA per transistor continuous output current.

Its thermal resistance is 417 K/W (per device, FR4 PCB), and it delivers h_FE ≥ 60 at I_C = 5 mA, V_CE = 5 V, while maintaining V_CE(sat) ≤ 150 mV at I_C = 10 mA / I_B = 0.5 mA-key for low-power switching integrity in compact automotive modules.

Key Specifications

Pinout & Package

Package: SOT363-3 (SC-88), 6-pin TSSOP surface-mount plastic package with 0.65 mm pitch, 2.2 mm × 1.35 mm footprint, and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSVD2N2334MUTBG and PUMH2-QX, the PUMH1-QX uniquely provides matched dual-NPN switching with symmetrical bias networks in a single SOT363-3 package-optimizing board area, reducing assembly steps, and simplifying validation for automotive digital I/O consolidation.

Availability

PUMH1-QX is available at Aetrix Electronics and suitable for automotive door modules, USB-C interface control, industrial sensor buffering, and smart HVAC actuation requiring stable component supply and AEC-Q101-compliant performance.

Supply support for PUMH1-QX 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 leading global semiconductor expert focused on essential system functionality-delivering high-performance, reliable discrete, logic, and MOSFET components for automotive, industrial, and consumer markets.

The PUMH1-QX belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered to replace discrete BJT-resistor combinations in space-constrained, high-reliability digital interface applications-especially where AEC-Q101 compliance and simplified layout are critical.

FAQ

What is the maximum allowable junction temperature for PUMH1-QX?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in the Limiting Values table. Operation above this temperature risks permanent parametric shift or failure. Derating begins at T_amb > 25 °C per the 417 K/W thermal resistance curve-designers must calculate T_j = T_amb + (P_diss × R_th(j-a)) to ensure margin.

Can PUMH1-QX be used in 5 V logic systems with 3.3 V microcontrollers?

Yes. Its V_I(on) ranges from 1.7 V to 2.5 V and V_I(off) from 0.8 V to 1.1 V at 25 °C, providing clear logic separation for 3.3 V GPIOs driving 5 V loads. The integrated R1 resistor ensures stable base bias without external pull-ups, and h_FE ≥ 60 guarantees saturation even at reduced drive current.

Is the SOT363-3 package lead-free and RoHS compliant?

Yes. Nexperia confirms the PUMH1-QX uses lead-free terminations and complies with EU RoHS Directive 2011/65/EU and REACH SVHC regulations. The package is qualified for reflow soldering per J-STD-020, with peak temperature tolerance up to 260 °C for 10 seconds-verified in the official package outline documentation.

How does the R2/R1 = 1.0 ratio affect circuit behavior?

The R2/R1 ratio of 1.0 means the feedback resistor (R2) equals the input resistor (R1), forming a unity-gain base bias network that stabilizes operating point against β variation. This improves consistency in V_CE(sat) and switching thresholds across temperature and unit-to-unit spread-critical for deterministic timing in automotive control loops.