Diodes Incorporated DDTC123JCA-7-F

Overview

DDTC123JCA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring integrated bias resistors R1 = 2.2 kΩ and R2 = 47 kΩ (R1 ≠ R2), V_CEO = 50 V, I_C(MAX) = 100 mA, and DC current gain (h_FE) = 80 at I_C = 10 mA. It delivers logic-level switching with V_I(ON) = 3.0 V and V_O(ON) = 0.3 V at I_O/I_IN = 5 mA/0.25 mA, used in automotive LED driver control circuits.

For engineers reviewing the DDTC123JCA-7-F datasheet, DDTC123JCA-7-F pinout, DDTC123JCA-7-F application, or DDTC123JCA-7-F equivalent, key selection criteria include input voltage threshold (3.0 V), output saturation voltage (0.3 V), resistor ratio tolerance (±20%), AEC-Q101 qualification, and SOT23 thermal resistance (625 °C/W).

Technical Context

This device integrates a monolithic NPN transistor with two discrete on-die biasing resistors (R1 = 2.2 kΩ, R2 = 47 kΩ), enabling single-pin digital input control without external base resistors. Its R1 ≠ R2 architecture provides asymmetric bias for optimized turn-on speed and leakage suppression.

Designed for high-reliability automotive applications, it operates across −55 °C to +150 °C, supports 50 V collector-emitter breakdown, and maintains stable h_FE = 80 under 10 mA collector current and 5 V V_CE, with f_T = 250 MHz for moderate-frequency switching.

Key Specifications

Pinout & Package

Package: SOT23 - Surface-mount plastic case (2.4 mm × 1.3 mm × 1.0 mm), UL 94V-0 rated, moisture sensitivity Level 1, matte tin-plated leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTC123YCA-7-F and NSVD123JXV6T1G, DDTC123JCA-7-F uniquely balances low-input-threshold switching (3.0 V), automotive qualification, and compact SOT23 packaging-making it optimal for space-constrained, safety-critical LED control nodes.

Availability

DDTC123JCA-7-F is available at Aetrix Electronics and suitable for automotive interior lighting control, industrial sensor interface buffering, and consumer appliance panel indicators requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DDTC123JCA-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, specializing in high-reliability components for automotive, industrial, and computing markets since 1959.

This part belongs to the DDTC (R1 ≠ R2 Series) CA family-engineered specifically for simplified, robust digital switching in harsh-environment applications where AEC-Q101 compliance and resistor-ratio precision are critical.

FAQ

What is the maximum operating temperature for DDTC123JCA-7-F?

The device is rated for junction and storage temperatures from −55 °C to +150 °C. Its thermal resistance (R_θJA) is 625 °C/W on FR4 board with minimum pad layout, meaning it can sustain 100 mA continuous current up to +85 °C ambient without derating when properly mounted.

Does DDTC123JCA-7-F require external base resistors?

No. It integrates R1 = 2.2 kΩ and R2 = 47 kΩ on-die, forming a complete bias network. Pin 2 (base) connects directly to logic sources; no external resistors are needed for standard switching operation at 3.3 V or 5 V.

Is this part suitable for PWM-driven LED dimming?

Yes. With f_T = 250 MHz and typical turn-on delay <15 ns (per Diodes' characterization curves), it supports PWM frequencies up to 50 kHz at 50% duty cycle while maintaining low V_CE(SAT) = 0.3 V and minimal switching loss.

How does the R1 ≠ R2 configuration improve performance over R1 = R2 types?

The asymmetric resistor ratio increases input impedance in OFF state (reducing leakage) while delivering sufficient base current for fast saturation in ON state. This yields lower standby current (0.5 μA) and sharper logic transitions compared to symmetric-bias equivalents like DDTC143ZCA.