Diodes Incorporated DDTD142JC-7-F

Overview

DDTD142JC-7-F from Diodes Incorporated is an NPN pre-biased digital transistor in SOT23 package, featuring integrated 47kΩ input bias resistor (R1) and open emitter (R2), 500mA continuous collector current, 50V V_CBO, and 0.3V V_CE(sat) at I_C = 50mA/I_B = 2.5mA. It serves as a compact, RoHS-compliant switching element in low-voltage logic interface and load control circuits.

For engineers reviewing the DDTD142JC-7-F datasheet, DDTD142JC-7-F pinout, DDTD142JC-7-F application, or DDTD142JC-7-F equivalent, key selection criteria include verified input resistor value (47kΩ), guaranteed saturation voltage under 50mA load, thermal resistance (R_θJA = 500°C/W on FR4), AEC-Q101 readiness for automotive use, and SOT23 footprint compatibility with space-constrained PCB layouts.

Technical Context

This device integrates a single NPN transistor with monolithically embedded base biasing network-R1 = 47kΩ connected between base and input pin, R2 omitted (open), enabling direct TTL/CMOS-level drive without external resistors. It operates as a saturated switch, not a linear amplifier, with guaranteed turn-on threshold (V_IN(on) = 2.0V @ I_O = 20mA) and sub-0.3V saturation voltage.

Designed for discrete logic-level translation and low-side switching, it supports fast switching (f_T = 200MHz) while maintaining DC current gain (h_FE = 100–600) and robust ESD tolerance. Its "Green" halogen-free molding compound and IATF 16949 manufacturing ensure compliance for automotive and industrial applications requiring long-term reliability.

Key Specifications

Pinout & Package

Package: SOT23 - Surface-mount plastic package (2.9mm × 1.3mm × 1.0mm), UL 94V-0 rated, matte tin-plated leads, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTD142TC-7-F (obsolete) and NSVD142JXV6T1G (400mA), DDTD142JC-7-F offers active production status, full 500mA current rating, and lowest thermal resistance (500°C/W), making it optimal for high-reliability, high-current switching where board space and thermal headroom are constrained.

Availability

DDTD142JC-7-F is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC output stages, and consumer appliance control boards requiring stable component supply and long-term manufacturability.

Supply support for DDTD142JC-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 Diodes' DDTD series of pre-biased transistors, engineered specifically for simplified logic-level switching in automotive, industrial, and consumer systems where board space, BOM cost, and qualification rigor are critical.

FAQ

What is the function of Pin 2 in DDTD142JC-7-F?

Pin 2 is the base terminal, internally connected to one end of the 47kΩ bias resistor (R1). The other end of R1 connects to Pin 1 (emitter), forming a built-in base pull-down network. This allows direct connection of a logic-high signal to Pin 2 to turn on the transistor without external components.

Does DDTD142JC-7-F support AEC-Q101 qualification?

DDTD142JC-7-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified as a standard AEC-Q101 part, Diodes confirms it meets AEC-Q101 stress test requirements upon customer request and change-controlled release for automotive applications.

Can DDTD142JC-7-F replace a standard 2N3904 with external bias resistors?

Yes-it replaces a 2N3904 plus two external resistors (base pull-up and pull-down) in switching applications. Its integrated 47kΩ R1 and open R2 match typical 5V logic drive conditions, but note its fixed gain profile and 500mA I_C limit differ from the 2N3904's 200mA rating and variable external bias flexibility.

What is the maximum allowable pulse current for DDTD142JC-7-F?

The datasheet does not specify pulsed I_C beyond DC limits. However, Figure 3 shows pulse power dissipation up to 0.3W for 1ms pulses at D=0.1 duty cycle. Using P = I²R and V_CE(sat) ≈ 0.3V, peak pulse current is estimated ≤ 1A for short durations with adequate cooling and duty cycle control.