Diodes Incorporated DDTA143ECA-7-F

Overview

DDTA143ECA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT23 package, featuring integrated bias resistors R1 = R2 = 4.7 kΩ, −50 V V_CEO, −100 mA I_C(max), and AEC-Q101 qualification for automotive applications. It functions as a digital switch or level translator in low-power logic interface circuits.

For engineers reviewing the DDTA143ECA-7-F datasheet, DDTA143ECA-7-F pinout, DDTA143ECA-7-F application, or DDTA143ECA-7-F equivalent, key selection criteria include input voltage range (−1.9 V typical V_IN(ON)), output saturation voltage (−0.1 V typ at −10 mA), DC current gain (20× min), thermal resistance (625 °C/W), and AEC-Q101 compliance for harsh-environment reliability.

Technical Context

This device integrates two matched 4.7 kΩ resistors to provide fixed base biasing, eliminating external components for simple on/off switching. Its PNP topology enables high-side load control with logic-level compatible input thresholds and rail-to-rail output swing capability under −5 V supply.

The SOT23 package supports surface-mount assembly with JEDEC-standard footprint and 0.008 g mass. Thermal performance is specified at 200 mW power dissipation on FR-4 board with minimum pad layout, and operation is rated from −55 °C to +150 °C ambient.

Key Specifications

Pinout & Package

Package: SOT23 - Surface-mount plastic case, 3-terminal, 0.008 g mass, UL 94V-0 rated molding compound, matte tin-plated leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP pre-biased transistor applications.

Compared with DDTA143ECA-7-F, DDTA143ZCA-7-F improves input threshold consistency at the expense of slightly higher cost, while NSVD143EWT1G offers identical biasing and footprint but lacks automotive qualification and has lower voltage rating-making it suitable only for non-critical commercial applications.

Availability

DDTA143ECA-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input interfaces, and consumer appliance control boards requiring stable component supply and AEC-Q101 compliance.

Supply support for DDTA143ECA-7-F 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.

This part belongs to the DDTA pre-biased transistor product line, engineered specifically for simplified digital switching in automotive and industrial control systems where reliability, small size, and reduced external component count are essential.

FAQ

What is the maximum operating temperature for DDTA143ECA-7-F?

The DDTA143ECA-7-F is rated for operation from −55 °C to +150 °C junction temperature. Its thermal resistance (R_θJA) is 625 °C/W on FR-4 board with minimum pad layout, so ambient temperature must be derated accordingly-e.g., at 200 mW dissipation, max ambient is +115 °C before exceeding T_J(max) = +150 °C.

Can DDTA143ECA-7-F replace a standard PNP transistor like BC807?

No-it cannot directly replace a bare PNP transistor such as BC807 because it includes integrated 4.7 kΩ base resistors. Using it in place of BC807 would require removing external bias resistors and verifying that the fixed R1/R2 ratio meets the target circuit's required base current and switching speed, especially under varying V_CC conditions.

Is the SOT23 package lead-free and RoHS compliant?

Yes-DDTA143ECA-7-F is fully RoHS 3 compliant (2015/863/EU), lead-free, halogen-free (<900 ppm Br/Cl), and antimony-free. Its matte tin-plated leads meet MIL-STD-202 Method 208 solderability requirements, and the molding compound is UL 94V-0 rated.

What does the "-7-F" suffix indicate in the part number?

The "-7-F" denotes tape-and-reel packaging: 7-inch reel diameter, 8 mm tape width, and 3,000 units per reel. The "F" confirms full RoHS 3 and green compliance. This packaging format is optimized for automated SMT assembly and supports JIT inventory management in high-volume production.