Nexperia USA Inc. PMST2907A,115

Overview

PMST2907A from Nexperia is a PNP bipolar junction transistor designed for general-purpose switching and linear amplification in space-constrained PCB layouts. It delivers −60 V V_CEO, −600 mA I_C, DC current gain (h_FE) of 100–300 at −150 mA, −10 V V_CE, and operates in SOT323 (SC-70) package with 2.0 mm × 1.25 mm footprint. It is commonly used in low-power load switching circuits such as LED drivers and microcontroller-driven relay interfaces.

For engineers reviewing the PMST2907A datasheet, PMST2907A pinout, PMST2907A application, or PMST2907A equivalent, key selection criteria include verified PNP polarity, guaranteed −60 V breakdown rating, confirmed −600 mA continuous collector current capability, SC-70 thermal derating behavior, and validated switching performance (t_on ≤ 45 ns, t_off ≤ 300 ns) under pulsed conditions.

Technical Context

This discrete PNP transistor employs standard planar epitaxial process technology optimized for stable DC gain and fast switching in low-voltage, low-current control paths. Its base-emitter saturation voltage (V_BEsat) remains ≤ −2.6 V at −500 mA/−50 mA drive, supporting robust turn-on in logic-level interfaced circuits.

Thermal design relies on FR4 PCB mounting with R_th(j-a) = 625 K/W; power dissipation is limited to 200 mW at T_amb ≤ 25 °C and derates linearly above that temperature. The device exhibits f_T = 200 MHz at −20 V V_CE, −50 mA I_C, confirming suitability for medium-speed digital switching rather than RF or high-frequency analog use.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mount package: 3-terminal, 1.3 mm pitch, 2.0 mm × 1.25 mm × 0.95 mm body size, optimized for automated placement and reflow soldering on dense PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP switching transistor applications.

Compared with MMBT2907A and DXT2907AP-7, PMST2907A offers optimal balance of ultra-small SOT323 size, verified −600 mA capability, and full analog gain control-making it ideal for space-limited, precision-switched, and mixed-signal interface applications where base drive flexibility matters.

Availability

PMST2907A is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller I/O expansion, relay interfaces, and level-shifting inverters requiring stable component supply across prototyping, pilot production, and volume manufacturing phases.

Supply support for PMST2907A 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 specializing in high-performance, energy-efficient logic, discrete, and MOSFET devices, headquartered in Nijmegen, Netherlands.

The PMST2907A belongs to Nexperia's general-purpose bipolar transistor product line, engineered for reliability and consistency in consumer, industrial, and communication equipment where compact size and predictable DC/switching behavior are essential.

FAQ

Is PMST2907A automotive-qualified?

No. Per Nexperia's revision history (v.5, October 2024), PMST2907A is explicitly designated as non-automotive qualified. It has not undergone AEC-Q101 stress testing or qualification for automotive environments. For automotive applications, Nexperia offers the PMST2907AQ variant with full AEC-Q101 certification and extended temperature range support.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is −200 mA (single pulse, t_p ≤ 1 ms), but continuous base current must be limited to maintain safe junction temperature. At T_amb = 25 °C, with P_tot = 200 mW and typical V_BE ≈ −0.8 V, continuous I_B should not exceed approximately −25 mA to avoid exceeding thermal limits under worst-case h_FE conditions.

Can PMST2907A replace PMST2222A in a circuit?

No-it cannot serve as a direct replacement because PMST2222A is an NPN transistor (complementary type), with opposite polarity, pinout (E-B-C vs B-E-C), and biasing requirements. Swapping them would reverse current direction and likely prevent circuit operation. Use only as intended: PMST2907A for PNP roles, PMST2222A for NPN roles.

Does PMST2907A support linear amplification mode?

Yes. The datasheet specifies h_FE across a wide collector current range (−0.1 mA to −500 mA) and provides V_BE vs I_C curves (Fig. 5), confirming stable DC transfer characteristics. It is suitable for low-frequency analog amplification (e.g., sensor signal conditioning) when biased within its safe operating area and with attention to thermal stability on FR4 PCB.