Nexperia USA Inc. PMBS3906,235

Overview

PMBS3906,235 from Nexperia is a PNP general-purpose bipolar junction transistor in SOT23 (TO-236AB) package, rated for −40 V V_CEO, −100 mA I_C, and DC current gain (h_FE) of 100–300 at −10 mA collector current. It serves as a low-power switching or linear amplification device in compact consumer and industrial signal-path circuits.

For engineers reviewing the PMBS3906,235 datasheet, PMBS3906,235 pinout, PMBS3906,235 application, or PMBS3906,235 equivalent, key selection criteria include its verified −40 V breakdown rating, −100 mA continuous collector capability, SOT23 footprint compatibility, and complementary pairing with PMBS3904 for push-pull designs.

Technical Context

This discrete PNP BJT operates in active, saturation, and cutoff regions with defined V_CE(sat) ≤ −400 mV at −50 mA/−5 mA drive and V_BE(sat) ≤ −950 mV under same conditions. Its f_T of 150 MHz supports high-speed switching up to 700 ns turn-off time.

Thermal resistance R_th(j-a) is 500 K/W on FR4 PCB, limiting usable power dissipation to 250 mW at T_amb ≤ 25 °C. Leakage currents are tightly controlled: I_CBO ≤ −50 nA and I_EBO ≤ −50 nA at rated voltages and 25 °C.

Key Specifications

Pinout & Package

Package: SOT23 (TO-236AB), surface-mount plastic package with 3 leads, 1.3 mm × 2.9 mm footprint, 1.1 mm height, and JEDEC-compliant pin spacing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT3906LT1G and BC807-40,215, PMBS3906,235 delivers optimal balance of SOT23 footprint density, 150 MHz bandwidth, and −400 mV saturation voltage-making it preferred for high-density, medium-speed switching where thermal budget is constrained.

Availability

PMBS3906,235 is available at Aetrix Electronics and suitable for LED driver circuits, level-shifting interfaces, small-signal amplifiers, and power supply enable switches requiring stable component supply and consistent parametric performance.

Supply support for PMBS3906,235 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 discrete and logic devices, with manufacturing rooted in process innovation and automotive-grade reliability standards.

PMBS3906,235 belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-sensitive, space-constrained applications demanding predictable DC gain, low saturation voltage, and robust thermal behavior in consumer and industrial electronics.

FAQ

Is PMBS3906,235 suitable for automotive applications?

No. PMBS3906,235 is not automotive-qualified. It lacks AEC-Q101 certification, has no guaranteed operation beyond 125 °C junction temperature, and is not tested to automotive transient immunity or lifetime reliability standards. Use only in commercial or industrial environments.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is −200 mA, but for continuous DC operation, base current must be limited to ensure junction temperature stays within 150 °C. At 25 °C ambient and 250 mW total dissipation, I_B should not exceed −5 mA when driving −50 mA collector current to maintain safe thermal margin.

Can PMBS3906,235 replace PMBS3904 in a circuit?

No-it cannot directly replace the NPN PMBS3904 due to opposite polarity. Swapping would invert logic states and likely cause circuit failure. However, PMBS3906,235 is the designated PNP complement to PMBS3904 and is intended for use in complementary pairs (e.g., push-pull output stages), not substitution.

Does PMBS3906,235 require a heatsink in standard SOT23 mounting?

No heatsink is required. With R_th(j-a) = 500 K/W and P_tot = 250 mW at 25 °C ambient, junction temperature rise is 125 K-resulting in T_j = 150 °C maximum. This matches the absolute max rating, so operation at full power is only safe at or below 25 °C ambient; derating is necessary at higher temperatures.