Infineon Technologies SMBT3904E6767

Overview

SMBT3904E6767 from Nexperia is an NPN general-purpose bipolar junction transistor (BJT) in SOT-23 package, with 200 mA I_C, 40 V V_CEO, and 100–300 h_FE at I_C = 10 mA, used for low-power switching and amplification in consumer portables and LED driver stages.

For engineers reviewing the SMBT3904E6767 datasheet, SMBT3904E6767 pinout, SMBT3904E6767 application, or SMBT3904E6767 equivalent, key selection factors include DC current gain consistency at 10 mA, V_CE(sat) ≤ 0.3 V at I_C/I_B = 50 mA/5 mA, thermal resistance R_thj-amb = 300 K/W, and SOT-23 footprint compatibility with automated assembly.

Technical Context

This BJT operates in active and saturation regions with base-emitter forward bias enabling controlled collector current flow. Its h_FE range is specified at I_C = 10 mA and V_CE = 1 V, and V_CE(sat) is guaranteed ≤ 0.3 V under forced β = 10 conditions.

Designed for surface-mount use, it supports reflow soldering per JEDEC J-STD-020, with maximum junction temperature of 150 °C and storage temperature range from −65 °C to +150 °C.

Key Specifications

Pinout & Package

Supplied in JEDEC-standard SOT-23 plastic surface-mount package with gull-wing leads; moisture sensitivity level (MSL) 1, compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT3904LT1G, SMBT3904E6767 offers identical core performance with traceable lot control; versus BC847BW, it trades higher minimum h_FE for lower V_CE(sat), favoring efficiency-critical switching roles.

Availability

SMBT3904E6767 is available at Aetrix Electronics and suitable for LED driver stages, microcontroller GPIO expansion, level translation interfaces, and small-signal amplifiers requiring stable component supply and SOT-23 footprint consistency.

Supply support for SMBT3904E6767 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 high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.

The SMBT3904 series belongs to Nexperia's general-purpose BJT product line, engineered for cost-sensitive, space-constrained applications demanding robust DC performance and manufacturability in consumer, computing, and industrial electronics.

FAQ

What is the maximum continuous collector current for SMBT3904E6767?

The absolute maximum continuous collector current (I_C) is 200 mA at T_amb = 25 °C. Derating applies above 25 °C ambient: linear reduction of 1.6 mA/°C beyond that point, based on R_thj-amb = 300 K/W and P_D = 250 mW rating. Operation above 200 mA requires verification of junction temperature under actual board conditions.

Is SMBT3904E6767 suitable for PWM-driven LED dimming?

Yes - its short turn-on time (t_on = 5 ns) and turn-off time (t_off = 35 ns) support PWM frequencies up to 2 MHz. Combined with V_CE(sat) ≤ 0.3 V at I_C/I_B = 50 mA/5 mA, it delivers efficient switching with minimal duty-cycle distortion in constant-current LED drivers.

Does SMBT3904E6767 have built-in ESD protection?

No - SMBT3904E6767 is an unclamped BJT with no integrated ESD diodes. Per Nexperia documentation, it meets HBM ESD rating of ±4 kV (Class 3A), but external protection (e.g., series resistor + TVS) is required in environments with frequent handling or connector hot-plug events.

Can SMBT3904E6767 replace BC547 in existing designs?

Yes, with validation - both are NPN BJTs in TO-92 and SOT-23 packages respectively. SMBT3904E6767 matches BC547's V_CEO (45 V vs 40 V), but has lower V_CE(sat) and narrower h_FE spread. Layout adaptation is needed due to SOT-23 vs TO-92 footprint; electrical behavior remains compatible in most linear and switching roles.