Diodes Incorporated 2DA1774QLP-7

Overview

2DA1774QLP-7 from Diodes Incorporated is a 40V PNP small-signal transistor in X1-DFN1006-3 package, rated for -100mA collector current and -40V V_CEO, with 0.4W power dissipation at T_A = +25°C on minimum pad layout. It delivers h_FE = 120–270 at V_CE = -6V/IC = -1mA and f_T = 100MHz, and is AEC-Q101 qualified for automotive signal switching applications.

For engineers reviewing the 2DA1774QLP-7 datasheet, 2DA1774QLP-7 pinout, 2DA1774QLP-7 application, or 2DA1774QLP-7 equivalent, key selection criteria include its DFN1006 footprint (0.6mm²), -40V breakdown rating, thermal resistance R_θJA = 310°C/W, ESD HBM rating of 4kV, and complementary pairing with 2DC4617QLP.

Technical Context

This PNP transistor operates in linear and saturation modes with verified DC current gain (h_FE) spanning 120–270 under standard bias conditions. Its f_T = 100MHz and C_obo = 5.0pF at V_CB = -12V support high-frequency switching up to ~10MHz in low-power amplification and digital logic interface circuits.

Thermal performance is defined by R_θJA = 310°C/W (min pad) and R_θJL = 120°C/W to the exposed collector pad, enabling stable operation from -55°C to +150°C. The device meets AEC-Q101 stress testing requirements and is manufactured in IATF16949-certified facilities.

Key Specifications

Pinout & Package

Package: X1-DFN1006-3 - 0.6mm² footprint, 0.5mm height, 3-terminal leadless plastic package with exposed collector pad (pin 3). Molded in halogen-free, RoHS-compliant compound (UL 94V-0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DXT3904-7 and BC807-40,215, the 2DA1774QLP-7 uniquely combines AEC-Q101 qualification, 0.6mm² footprint, and validated 4kV HBM robustness-making it optimal for space-constrained, automotive-grade signal switching where thermal and reliability margins are tight.

Availability

2DA1774QLP-7 is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, consumer audio bias networks, and medical wearable power control requiring stable component supply and long-term lifecycle assurance.

Supply support for 2DA1774QLP-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 2DA1774QLP belongs to Diodes' AEC-Q101-qualified small-signal transistor product line, engineered specifically for automotive body electronics and industrial control systems demanding high reliability in miniaturized packages.

FAQ

What is the maximum allowable continuous collector current for 2DA1774QLP-7 at 85°C ambient?

At T_A = +85°C, derating applies: P_D drops linearly from 0.4W at 25°C using R_θJA = 310°C/W. Maximum I_C is limited by V_CE(sat) ≤ -0.2V at I_B = -5mA, yielding ~65mA continuous under typical PCB thermal conditions. Full derating curves are in Figure 3 of DS31438 Rev. 6-2.

Is the exposed collector pad electrically isolated or must it be connected to circuit ground?

The exposed collector pad (Pin 3) is electrically connected to the transistor's collector terminal and must be soldered to a PCB copper area serving as both current return path and thermal sink. It is not isolated and should never be left floating or tied to ground unless the circuit design explicitly requires collector-ground referencing.

Does 2DA1774QLP-7 support Pb-free reflow profiles per JEDEC J-STD-020?

Yes - the device is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and withstand standard Pb-free reflow (peak 260°C, 20–40 sec) without baking. NiPdAu terminal finish ensures reliable solderability under IPC-J-STD-006 requirements.

How does the 2DA1774QLP-7 complement the 2DC4617QLP in push-pull configurations?

Both share identical X1-DFN1006-3 packaging, matching thermal and electrical characteristics (V_CEO/V_CEO, h_FE range, f_T), and AEC-Q101 qualification. This enables symmetrical drive in complementary emitter-follower or Class-B output stages without layout mismatch or gain skew, reducing crossover distortion in low-voltage analog interfaces.