Nexperia USA Inc. PMST5089,115

Overview

PMST5089,115 from Nexperia is an NPN general-purpose transistor in SC-70 (SOT323) package, rated for 25 V V_CEO, 100 mA I_C, and 200 mW P_tot, with DC current gain h_FE of 400–1200 at I_C = 0.1 mA and noise figure of 2 dB at 100 μA. It serves as a low-noise amplifying device in audio input stages.

For engineers reviewing the PMST5089,115 datasheet, PMST5089,115 pinout, PMST5089,115 application, or PMST5089,115 equivalent, key selection criteria include its low-noise performance (2 dB), tight h_FE spread, SOT323 footprint compatibility, and thermal resistance (625 K/W on FR4), critical for space-constrained analog signal chains.

Technical Context

This discrete NPN bipolar junction transistor operates in linear amplification mode with V_CE = 5 V bias, delivering stable h_FE across I_C = 0.1–10 mA. Its f_T of 100 MHz supports audio-band and low-frequency RF preamplifier use.

Designed for low-noise analog front-ends, it features C_c = 4 pF and C_e = 12 pF to minimize Miller effect and base-emitter charge storage, while V_CEsat ≤ 500 mV at I_C/I_B = 10 mA/1 mA ensures efficient switching in low-power digital interface roles.

Key Specifications

Pinout & Package

SC-70 (SOT323) plastic surface-mounted package: 1.3 mm × 1.8 mm × 0.95 mm body, 3-terminal leadless outline with gull-wing leads. Designed for reflow soldering and high-density PCB placement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Compared with BC847BW,115 and MMBT5089LT1G, PMST5089,115 offers superior h_FE consistency at microamp bias currents and smallest footprint, making it optimal for ultra-compact, low-noise analog signal paths where thermal resistance and size are limiting factors.

Availability

PMST5089,115 is available at Aetrix Electronics and suitable for microphone preamplifiers, portable audio DAC output stages, and industrial sensor signal conditioning requiring stable component supply and consistent low-noise performance.

Supply support for PMST5089,115 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 leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with focus on automotive, industrial, computing, and consumer markets.

PMST5089,115 belongs to Nexperia's general-purpose bipolar transistor product line, engineered for reliable low-noise amplification and switching in space-constrained, cost-sensitive analog and interface circuits.

FAQ

Is PMST5089,115 RoHS compliant and halogen-free?

Yes. PMST5089,115 meets RoHS Directive 2011/65/EU and is halogen-free per Nexperia standard specifications. The SOT323 package uses lead-free matte tin plating, and material declarations confirm absence of brominated flame retardants and chlorine above 900 ppm thresholds.

What is the maximum operating junction temperature for continuous use?

The absolute maximum junction temperature T_j is 150 °C. For reliable long-term operation, junction temperature should be maintained below 125 °C using appropriate PCB copper area and ambient derating per the 625 K/W R_{th j-a} value on FR4.

Can PMST5089,115 replace PMST5088,115 in existing designs?

Yes, with minor design review. PMST5089 has lower V_CEO (25 V vs. 30 V) and V_CBO (30 V vs. 35 V), and higher h_FE (400–1200 vs. 300–900). Verify voltage margins and bias stability if operating near absolute maxima in the original PMST5088 design.

Does PMST5089,115 require external ESD protection in handheld applications?

Yes. With HBM ESD rating of ±2 kV (per Nexperia internal qualification), it requires external protection-such as a 100 nF ceramic capacitor at the base or series 100 Ω resistor-when exposed to user-accessible ports in handheld audio devices to prevent latch-up or parametric shift.