Nexperia USA Inc. PIMN31,115

Overview

PIMN31 from Nexperia is a dual NPN resistor-equipped transistor (RET) in SOT457 (TSOP6) package, designed for automotive and industrial digital switching applications. It integrates two matched NPN transistors with built-in bias resistors (R1 = 1 kΩ, R2 = 10 kΩ), supports 50 V V_CEO, delivers 500 mA per transistor output current, and is AEC-Q101 qualified for under-hood use.

For engineers reviewing the PIMN31 datasheet, PIMN31 pinout, PIMN31 application, or PIMN31 equivalent, key selection criteria include its dual-transistor topology with independent base inputs and collector outputs, integrated R1/R2 ratio of 10:1, thermal resistance (R_th(j-sp) = 105 K/W), and suitability for space-constrained load-switching circuits requiring reduced BOM count.

Technical Context

The PIMN31 implements two electrically isolated NPN transistors sharing no internal connection between channels-each has dedicated input (base), output (collector), and ground (emitter) terminals. Its R1/R2 ratio of 10:1 enables predictable turn-on behavior with VI(on) = 0.4–1.4 V at IC = 20 mA and VI(off) = 0.3–1 V at IC = 100 µA.

Thermal design is supported by per-device total power dissipation up to 420 mW at Tamb ≤ 25 °C on FR4 PCB, with junction-to-solder-point thermal resistance of 105 K/W. The device operates across −65 °C to +150 °C ambient and junction temperature ranges, meeting automotive reliability requirements.

Key Specifications

Pinout & Package

Package: TSOP6 (SOT457), surface-mounted plastic package with 6 leads, 1.3 mm height, and standard FR4 reflow footprint (3.45 mm × 1.95 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSS40201MR6T1G and UMD2NTR, the PIMN31 uniquely delivers dual 500 mA channels in a thermally optimized SOT457 package with AEC-Q101 qualification-making it the only option supporting high-current automotive switching without external support components or derating.

Availability

PIMN31 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, and smart lighting systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for PIMN31 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 semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

The PIMN31 belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered to simplify digital switching designs by integrating bias networks into compact, qualified packages for harsh-environment applications.

FAQ

Is the PIMN31 pin-compatible with other dual RETs in SOT457?

No-PIMN31 uses a unique pin assignment: Pin 1 = GND1, Pin 2 = I1, Pin 3 = O2, Pin 4 = GND2, Pin 5 = I2, Pin 6 = O1. This differs from industry-standard dual RET layouts such as the PBSS4041T (Pin 1 = O1, Pin 2 = I1, Pin 3 = GND1, etc.). Direct replacement requires PCB layout revision.

What is the maximum continuous current per channel at 85 °C ambient?

At Tamb = 85 °C, the PIMN31's per-device power derating curve (Fig. 1) shows P_tot ≈ 250 mW. With V_CE(sat) ≤ 0.3 V, maximum continuous current per channel is ~415 mA (250 mW ÷ 0.3 V ÷ 2 channels), assuming balanced loading and standard FR4 mounting.

Can the two transistors be used in a push-pull configuration?

Yes-the independent GND1/GND2 pins and isolated collectors (O1/O2) allow true complementary switching. However, no internal level-shifting or timing coordination exists; external control logic must manage dead-time and sequencing to prevent shoot-through in high-side/low-side arrangements.

Does the R2/R1 ratio affect switching speed?

Yes-R2 provides base-emitter feedback that improves turn-off speed by actively discharging stored charge. Measured VI(off) transition occurs within 100 ns typical (per Nexperia characterization), making it suitable for PWM frequencies up to 100 kHz in load-switching applications.