Diodes Incorporated 2DC4617Q-7

Overview

2DC4617Q-7 from Diodes Incorporated is a 50V, 150mA NPN small-signal transistor in SOT523 package, featuring V_CEO = 50V, I_C = 150mA, h_FE = 120–270 (at V_CE = 6V, I_C = 1mA), V_CE(SAT) ≤ 0.4V (I_C = 50mA, I_B = 5mA), and f_T = 140MHz - used for general-purpose switching and amplification in space-constrained automotive and industrial control modules.

For engineers reviewing the 2DC4617Q-7 datasheet, 2DC4617Q-7 pinout, 2DC4617Q-7 application, or 2DC4617Q-7 equivalent, key selection criteria include AEC-Q101 qualification, ultra-small SOT523 footprint, 4kV HBM ESD rating, thermal resistance of 833°C/W, and complementary PNP pairing with 2DA1774Q/R/S.

Technical Context

This NPN bipolar junction transistor operates as a discrete current-controlled switch or linear amplifier in low-power analog and digital signal paths. Its design supports stable DC biasing with h_FE binning (Q/R/S variants), low saturation voltage for efficient switching, and high f_T enabling RF front-end and high-speed logic interface functions up to ~140MHz.

Thermally, it is rated for operation from –55°C to +150°C with 150mW power dissipation at 25°C ambient, derating linearly to zero at ~105°C. The SOT523 package uses matte tin-plated leads and meets J-STD-020 Level 1 moisture sensitivity, supporting standard reflow profiles without preconditioning.

Key Specifications

Pinout & Package

SOT523 is an ultra-small surface-mount plastic package (1.6 × 1.6 × 0.6 mm) with gull-wing leads, optimized for high-density PCB layouts and automated assembly. It features matte tin-plated terminals, UL 94V-0 flammability rating, and J-STD-020 Level 1 moisture sensitivity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC846B,215 and MMBT3904LT1G, the 2DC4617Q-7 delivers superior space efficiency (SOT523), guaranteed 50V V_CEO, and automotive-grade reliability in a single-source solution - ideal where board area, voltage margin, and qualification are jointly constrained.

Availability

2DC4617Q-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, portable medical sensors, and consumer IoT power sequencing requiring stable component supply and AEC-Q101 compliance.

Supply support for 2DC4617Q-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The 2DC4617Q-7 belongs to Diodes' AEC-Q101-qualified small-signal transistor family, engineered for space-constrained, high-reliability applications in automotive and industrial environments where thermal robustness and consistent gain binning are critical.

FAQ

What is the maximum continuous collector current for the 2DC4617Q-7?

The 2DC4617Q-7 supports a maximum continuous collector current (I_C) of 150 mA at T_A = 25°C, derating linearly above that ambient temperature per the thermal resistance curve in Figure 1 of DS30252 Rev. 10–2. At 85°C ambient, the practical I_C limit drops to approximately 90 mA due to 150 mW power dissipation ceiling and R_θJA = 833°C/W.

Is the 2DC4617Q-7 compatible with lead-free reflow soldering processes?

Yes - the 2DC4617Q-7 uses matte tin-plated leads and is fully RoHS 3 compliant (2015/863/EU). It meets J-STD-020 Level 1 moisture sensitivity and is qualified for standard Pb-free reflow profiles (peak temperature ≤ 260°C, time above 217°C ≤ 60 seconds), with no preconditioning required.

How does the h_FE binning differ between 2DC4617Q, R, and S variants?

The Q variant has h_FE = 120–270, R is 180–390, and S is 270–560, all measured at V_CE = 6 V and I_C = 1 mA. This binning enables precise base resistor selection for consistent saturation or linear operation across production lots without post-manufacture sorting.

Can the 2DC4617Q-7 replace the MMBT3904 in existing designs?

Direct replacement is possible only if the PCB layout accommodates SOT523 (vs. SOT-23), voltage margin ≥50V is required, and AEC-Q101 qualification is needed. Electrical parameters overlap significantly, but the smaller footprint demands pad redesign, and V_CEO is 10V higher than MMBT3904's 40V rating - beneficial in transient-prone systems.