Diodes Incorporated DSC02120

Overview

DSC02120 from Diodes Incorporated is a 1200 V, 2 A silicon carbide Schottky diode in TO220AC (Type WX) package, designed for high-efficiency rectification with low conduction loss and fast reverse recovery. It delivers VF ≤ 1.7 V at 2 A and +25°C, IR ≤ 11.7 µA at 1200 V and +25°C, and supports junction temperatures up to +175°C - ideal for power factor correction and industrial motor drive DC-link freewheeling.

For engineers reviewing the DSC02120 datasheet, DSC02120 pinout, DSC02120 application, or DSC02120 equivalent, key selection criteria include its 1200 V blocking capability, thermal resistance of 10 °C/W (junction-to-case), SiC-based zero-recovery charge advantage, and suitability for high-temperature SMPS and UPS systems requiring stable leakage performance.

Technical Context

This SiC Schottky diode replaces conventional silicon fast recovery diodes in high-voltage switching applications by eliminating minority-carrier storage delay. Its unipolar conduction mechanism ensures near-zero reverse recovery charge (QC = 10 nC) and minimal temperature-dependent VF drift.

It operates across –55°C to +175°C with R_θJC = 10 °C/W and R_θJL = 9 °C/W, enabling direct mounting on aluminum heatsinks (20 mm × 10 mm × 1.64 mm). The device sustains non-repetitive surge current up to 24 A (10 ms half-sine) and exhibits capacitive charge <12 nC across 0–400 V reverse bias.

Key Specifications

Pinout & Package

Package: TO220AC (Type WX), 3-terminal through-hole package with isolated tab (cathode-connected tab), matte tin-plated copper leadframe, UL 94V-0 molded plastic body, weight ≈1.868 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SiC Schottky diode applications.

Compared with C3D02065E and SS120HE3/57T, DSC02120 uniquely combines 1200 V blocking, SiC-level Q_C, and TO220AC (Type WX) mechanical robustness - making it optimal for new 800–1000 V DC-link designs demanding long-term thermal stability and loss minimization.

Availability

DSC02120 is available at Aetrix Electronics and suitable for power factor correction, industrial motor drivers, and uninterruptible power supplies requiring stable component supply and qualified SiC diode sourcing.

Supply support for DSC02120 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.

The DSC series targets high-reliability SiC power rectification, specifically engineered for industrial, computing, and renewable energy systems needing high-voltage, high-temperature, low-loss diode solutions.

FAQ

Is DSC02120 suitable for automotive applications?

No - DSC02120 is not AEC-Q101 qualified and is explicitly marked "NOT RECOMMENDED FOR NEW DESIGNS" in its datasheet. Diodes Incorporated states that automotive-grade alternatives require specific change control, PPAP capability, and IATF 16949 manufacturing - none of which apply to this part. Use only in industrial, computing, or telecom systems.

What is the thermal resistance from junction to lead (R_θJL) and why does it matter?

R_θJL is 9 °C/W, measured from junction to the anode lead under JESD-51 conditions. This value matters because it defines how efficiently heat transfers from the die to the PCB copper pour or leadframe - critical for estimating local board temperature rise when lead soldering is used instead of tab heatsinking.

Does DSC02120 have a cathode-connected tab, and how should it be mounted?

Yes - the center tab is electrically connected to the cathode. When mounting to a heatsink, an electrically isolating but thermally conductive washer (e.g., mica or ceramic) must be used unless the heatsink is fully floating. Direct metal-to-metal contact without isolation risks shorting the cathode to system ground.

How does DSC02120's VF temperature coefficient affect parallel operation?

DSC02120 exhibits a positive VF temperature coefficient: VF increases as junction temperature rises. This self-balancing behavior promotes natural current sharing among paralleled units without external resistors - a key advantage over Si diodes with negative coefficients that can cause thermal runaway.