Diodes Incorporated 2DB1184Q-13

Overview

2DB1184Q-13 from Diodes Incorporated is a 50V PNP medium-power bipolar junction transistor in TO252 (DPAK) package, rated for -3A continuous collector current and -4.5A peak pulse current, with -1V V_CE(sat) at -2A/-0.2A and DC current gain (h_FE) of 120–270 at -0.5A. It serves as a switching or linear amplification device in automotive power control modules, LED driver stages, and industrial relay drivers.

For engineers reviewing the 2DB1184Q-13 datasheet, 2DB1184Q-13 pinout, 2DB1184Q-13 application, or 2DB1184Q-13 equivalent, key selection criteria include its AEC-Q101 qualification, low saturation voltage under high-current drive, thermal resistance to lead (8.3°C/W), and TO252 package compatibility with high-power PCB layouts requiring exposed collector pad soldering.

Technical Context

This PNP transistor uses epitaxial planar die construction to achieve stable h_FE across temperature (−55°C to +150°C) and low V_CE(sat) down to −1V at −2A. Its safe operating area supports single-pulse operation up to 100ms at 100mA and DC operation within 1.2W at ambient conditions.

The device features 4000V HBM ESD rating and operates with V_EBO = −5V, enabling robust base biasing in noisy automotive environments. Its f_T = 110MHz and C_obo = 26pF support moderate-speed switching applications such as PWM-controlled solenoid drivers and DC-DC converter pre-drivers.

Key Specifications

Pinout & Package

Package: TO252 (DPAK), surface-mount, with exposed collector pad for thermal and electrical connection. Molded green plastic housing (UL 94V-0), matte tin-plated leads, 0.34g mass.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power switching applications.

Compared with MJD122-13 and ZTX951, the 2DB1184Q-13 delivers optimal balance of automotive qualification, thermal performance (8.3°C/W R_θJL), and gain consistency-making it preferred for production-grade 12V automotive and industrial switching where reliability and manufacturability are critical.

Availability

2DB1184Q-13 is available at Aetrix Electronics and suitable for automotive body control modules, industrial relay interfaces, and LED driver circuits requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for 2DB1184Q-13 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, specializing in high-reliability components for automotive, industrial, and computing markets.

The 2DB1184Q belongs to Diodes' AEC-Q101-qualified bipolar transistor product line, designed specifically for medium-power switching and amplification in harsh-environment automotive and industrial control systems.

FAQ

Is the 2DB1184Q-13 suitable for high-frequency switching above 1MHz?

The 2DB1184Q-13 has a gain-bandwidth product (f_T) of 110MHz and measured turn-on/off times of 109ns/280ns. While usable in PWM applications up to ~1MHz, its storage time (246ns) and fall time (34ns) indicate it is optimized for medium-speed switching-not RF or ultrafast digital logic. For >2MHz operation, consider dedicated RF transistors or MOSFETs.

What PCB layout practices maximize thermal performance for the 2DB1184Q-13?

To achieve the rated 15W pulsed dissipation, the exposed collector pad must be soldered to ≥400mm² of 1oz copper on the top layer, connected via ≥4 thermal vias (0.3mm diameter) to an internal or bottom-layer ground plane. Avoid narrow traces between pad and copper area; follow Diodes' recommended TO252 pad layout (D1 = 5.21mm, C = 4.572 × 1.060 mm) for mechanical reliability.

Does the 2DB1184Q-13 require a base resistor, and how is its value calculated?

Yes-a series base resistor is mandatory to limit base current and ensure saturation. For −2A collector current and h_FE = 120 (min), minimum I_B = −2A/120 = −16.7mA. With V_BE(sat) ≈ −1.2V and 3.3V GPIO drive, R_B = (3.3V − 1.2V)/16.7mA ≈ 125Ω. Use 120Ω ±5% to guarantee saturation across temperature and process variation.

How does AEC-Q101 qualification impact the 2DB1184Q-13's use in non-automotive applications?

AEC-Q101 qualification mandates extended temperature cycling (−55°C to +150°C), accelerated life testing, and failure analysis protocols-resulting in higher intrinsic reliability and tighter parametric distributions. In industrial or medical applications, this translates to longer field life, reduced infant mortality, and improved consistency in high-stress thermal environments-even when automotive-specific change control is not required.