Diodes Incorporated DDTC123YCA-7-F

Overview

DDTC123YCA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring built-in bias resistors R1 = 2.2 kΩ and R2 = 10 kΩ (R1 ≠ R2), V_CEO = 50 V, I_C(MAX) = 100 mA, and DC current gain (h_FE) ≥ 33 at I_C = 5 mA. It is AEC-Q101 qualified and used for digital switching in automotive body control modules.

For engineers reviewing the DDTC123YCA-7-F datasheet, DDTC123YCA-7-F pinout, DDTC123YCA-7-F application, or DDTC123YCA-7-F equivalent, key selection criteria include input voltage threshold (V_IN(ON) = 3.0 V @ I_O = 20 mA), output saturation voltage (V_CE(SAT) ≤ 0.3 V), resistor tolerance (±30% on R1), resistance ratio tolerance (±20% on R2/R1), and thermal resistance (R_θJA = 625 °C/W).

Technical Context

This device integrates a monolithic NPN transistor with two discrete on-die biasing resistors-R1 connected between base and input, R2 between base and emitter-enabling single-resistor drive logic interface without external components. Its R1 ≠ R2 topology provides asymmetric turn-on/turn-off behavior optimized for clean digital switching.

Designed for high-reliability automotive applications, it operates across −55 °C to +150 °C, meets AEC-Q101 stress testing requirements, and delivers stable DC current gain (G_L = 33 min) under 5 mA collector load at V_CE = 5 V. The SOT23 package supports automated placement and reflow soldering per J-STD-020 Level 1 moisture sensitivity.

Key Specifications

Pinout & Package

Package: SOT23 - Surface-mount plastic case, 3-terminal, JEDEC TO-236AB compliant; dimensions: 2.9 mm × 1.35 mm × 1.0 mm (L × W × H); matte tin-plated leads, RoHS-compliant, halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTC123JCA-7-F and DDTC143XCA-7-F, DDTC123YCA-7-F offers optimal balance of input sensitivity (3.0 V threshold), drive capability (20 mA sink), and thermal performance (625 °C/W) for cost-sensitive 12 V automotive and industrial digital switching.

Availability

DDTC123YCA-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O cards, and consumer appliance motor drivers requiring stable component supply, AEC-Q101 compliance, and SOT23 surface-mount compatibility.

Supply support for DDTC123YCA-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 DDTC (R1≠R2 Series) CA family of pre-biased transistors, engineered specifically for simplified digital switching in automotive and industrial control systems where space, reliability, and qualification are critical.

FAQ

What is the maximum continuous collector current for DDTC123YCA-7-F?

The absolute maximum continuous collector current is 100 mA, verified per DS30330 Rev. 11–2 Absolute Maximum Ratings table. This rating applies at T_A = +25°C with derating above 25°C per the 625 °C/W thermal resistance curve. Operation beyond this limit risks permanent degradation of h_FE and V_CE(SAT).

Does DDTC123YCA-7-F require external base resistors?

No - it contains integrated R1 = 2.2 kΩ and R2 = 10 kΩ bias resistors, eliminating the need for external components. The R1 ≠ R2 configuration ensures predictable turn-on behavior with standard CMOS/TTL logic levels and prevents unintended conduction due to leakage currents.

Is DDTC123YCA-7-F suitable for automotive applications?

Yes - it is explicitly AEC-Q101 qualified and marked "AEC-Q101" in ordering information. It has passed stress tests including temperature cycling, high-temperature reverse bias, and ESD per JESD22, making it appropriate for non-safety-critical automotive subsystems such as lighting, HVAC, and body electronics.

What is the meaning of the "-7-F" suffix in DDTC123YCA-7-F?

The "-7-F" denotes tape-and-reel packaging: 7-inch reel diameter, 8 mm tape width, and 3,000 units per reel. The "F" indicates full RoHS compliance and green material content per Diodes Incorporated's definitions, including halogen- and antimony-free molding compound.