Nexperia USA Inc. PUMX1,115

Overview

PUMX1 from Nexperia is a dual NPN general-purpose transistor in a SOT363-3 (TSSOP6) package, rated for 40 V V_CEO and 100 mA I_C per transistor, with DC current gain (h_FE) ≥120 at V_CE = 6 V, I_C = 1 mA, T_amb = 25 °C, and AEC-Q101 qualified for automotive use.

For engineers reviewing the PUMX1 datasheet, PUMX1 pinout, PUMX1 application, or PUMX1 equivalent, this device supports compact dual-transistor switching and amplification in space-constrained PCB layouts where thermal resistance (R_th(j-a) = 416 K/W) and low saturation voltage (V_CEsat ≤ 200 mV at I_C = 50 mA, I_B = 5 mA) are critical.

Technical Context

The PUMX1 integrates two electrically isolated NPN transistors in a single 6-pin surface-mount package, enabling independent control of each transistor's base-emitter and collector-emitter paths. Its AEC-Q101 qualification confirms suitability for automotive ambient temperature ranges (−65 °C to +150 °C) and reliability under thermal cycling and mechanical stress.

Each transistor operates with V_CEO = 40 V, V_CBO = 50 V, and V_EBO = 5 V, supporting biasing flexibility and robustness against transient overvoltage. The device delivers f_T = 100 MHz and C_c = 1.5 pF, indicating usable high-frequency small-signal performance within general-purpose bandwidth limits.

Key Specifications

Pinout & Package

Package: SOT363-3 (TSSOP6), 6-lead plastic surface-mount package with 0.65 mm pitch, 2.2 mm × 1.35 mm body size, and exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC846BPDW1T1G and MBT3904DW1T1G, the PUMX1 offers balanced gain (h_FE ≥120), guaranteed automotive qualification, and optimized thermal resistance for sustained 100 mA operation-making it ideal for cost-sensitive, thermally constrained automotive and industrial control nodes where moderate speed suffices.

Availability

PUMX1 is available at Aetrix Electronics and suitable for automotive interior lighting control, industrial sensor signal conditioning, and IoT edge node power sequencing requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for PUMX1 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 for automotive, industrial, mobile, and computing markets.

The PUMX1 belongs to Nexperia's general-purpose bipolar transistor product line, designed specifically for space-constrained, thermally sensitive applications requiring dual-transistor integration and automotive-grade reliability without premium cost.

FAQ

Is the PUMX1 pin-compatible with other SOT363-3 dual transistors?

Yes-the PUMX1 uses the standard TSSOP6 (SOT363-3) pinout defined in Table 2 of its datasheet: Pin 1 = E1, Pin 2 = B1, Pin 3 = C2, Pin 4 = E2, Pin 5 = B2, Pin 6 = C1. This matches industry-standard dual NPN layouts including BC846BPDW1T1G and MBT3904DW1T1G, enabling drop-in replacement where electrical specs align.

What is the maximum allowable junction temperature during continuous operation?

The absolute maximum junction temperature (T_j) for the PUMX1 is 150 °C. For continuous operation at full 100 mA per transistor, ambient temperature must be limited to ≤75 °C when mounted on an FR4 PCB with single-sided copper, based on R_th(j-a) = 416 K/W and P_tot = 200 mW per transistor (300 mW per device).

Does the PUMX1 support linear (analog) operation, or is it intended only for switching?

The PUMX1 supports both linear and switching operation. Its specified h_FE, V_BE, and V_CEsat curves across temperature (Fig. 1–4), plus f_T = 100 MHz and low C_c = 1.5 pF, confirm suitability for small-signal amplification, active loads, and emitter followers-provided biasing stays within limiting values like I_C ≤ 100 mA and P_tot ≤ 200 mW per transistor.

How does AEC-Q101 qualification impact the PUMX1's use in non-automotive designs?

AEC-Q101 qualification means the PUMX1 has passed accelerated stress tests for temperature cycling, humidity, mechanical shock, and ESD-resulting in higher intrinsic reliability and longer field lifetime. While not required outside automotive, this qualification provides design margin for industrial, medical, and harsh-environment applications where extended service life and failure avoidance are critical.