Nexperia USA Inc. MMBT3904-QVL

Overview

MMBT3904-QVL from Micro Commercial Components is an NPN general-purpose amplifier transistor in SOT-23 package, rated for 200 mA collector current, 40 V V_CEO, and 350 mW power dissipation at 25°C ambient. It delivers DC current gain (h_FE) of 100–300 at I_C = 10 mA, V_CE = 1.0 V, and operates across −65°C to +150°C junction temperature range - used in low-voltage signal switching and amplification stages of consumer audio preamps and sensor interface circuits.

For engineers reviewing the MMBT3904-QVL datasheet, MMBT3904-QVL pinout, MMBT3904-QVL application, or MMBT3904-QVL equivalent, key selection criteria include verified h_FE spread at 10 mA bias, V_CE(sat) ≤ 300 mV at I_C/I_B = 10/1 mA, thermal resistance (R_θJA) of 357°C/W, and RoHS-compliant halogen-free construction per JEDEC J-STD-020.

Technical Context

This NPN bipolar junction transistor uses epitaxial planar die construction with emitter ballasting for stable current gain and thermal performance. Its base-emitter and collector-base junctions are optimized for low saturation voltage and fast switching, supporting rise/fall times under 35 ns at I_C = 10 mA.

The device exhibits f_T = 300 MHz at V_CE = 1.0 V, I_C = 10 mA, enabling use in RF front-end biasing and low-frequency oscillator loads. Noise figure is 5 dB at V_CE = 5.0 V, I_C = 1.0 mA, R_S = 1 kΩ, 1 kHz–10 kHz bandwidth.

Key Specifications

Pinout & Package

MMBT3904-QVL is housed in a standard SOT-23 surface-mount plastic package (3.0 × 1.4 × 1.0 mm), with gull-wing leads and RoHS-compliant matte tin finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN small-signal amplifier applications.

Compared with BC847BW and PN2222A-AP, MMBT3904-QVL offers optimal balance of SOT-23 space efficiency, 350 mW power headroom, and validated 300 MHz f_T - making it preferred for high-density mixed-signal PCBs where layout area and RF-capable gain are jointly constrained.

Availability

MMBT3904-QVL is available at Aetrix Electronics and suitable for audio preamplification, sensor biasing, logic-level switching, and power rail enable control requiring stable component supply across production volumes from prototype to 100k units/year.

Supply support for MMBT3904-QVL 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

Micro Commercial Components (MCC) is a U.S.-based semiconductor manufacturer specializing in discrete devices including diodes, transistors, and ESD protection components for cost-sensitive, high-volume applications.

The MMBT3904-QVL belongs to MCC's QVL (Qualified for Automotive) series - designed for extended temperature operation and AEC-Q101 stress testing compliance, targeting automotive body electronics and industrial control systems.

FAQ

Is MMBT3904-QVL AEC-Q101 qualified?

Yes. The "QVL" suffix denotes qualification per AEC-Q101 Rev D for stress tests including HTGB, HTRB, and temperature cycling. Full test reports are available upon request for design-in validation in automotive body control modules and lighting systems.

What is the maximum peak pulse current rating?

The device supports I_CM = 500 mA for t_p ≤ 100 µs with 1% duty cycle, as confirmed by MCC's transient thermal simulation and pulsed characterization data - applicable for short-duration surge suppression in I/O protection circuits.

Does MMBT3904-QVL have built-in ESD protection?

No. It lacks integrated ESD clamps; per MCC documentation, it has HBM ESD rating of 2 kV (Class C). External TVS diodes or series resistors are required for I/O lines exposed to >500 V human-body model events.

Can MMBT3904-QVL replace 2N3904 in existing designs?

Yes, with verification of thermal margin. Both share identical electrical specs and pinout, but MMBT3904-QVL's SOT-23 package has higher R_θJA (357°C/W vs. 2N3904's TO-92 at ~200°C/W); ensure PCB copper area and airflow meet derated power requirements at full load.