Diodes Incorporated STPR2020CTW

Overview

STPR2020CTW from Diodes Incorporated is a superfast glass passivated rectifier diode rated for 200 V reverse voltage and 20 A average forward current at TC = 110°C, with 30 ns reverse recovery time and 0.94 V forward voltage at 20 A/25°C, used in high-frequency DC-DC converters and switched-mode power supplies.

For engineers reviewing the STPR2020CTW datasheet, STPR2020CTW pinout, STPR2020CTW application, or STPR2020CTW equivalent, key selection criteria include reverse recovery time (30 ns), thermal resistance (2°C/W junction-to-case), AEC-Q101 qualification, TO-220AB package mounting requirements, and low VF performance across temperature.

Technical Context

This device is a single-phase, dual-common-cathode configuration fast recovery rectifier optimized for high-efficiency switching topologies. Its 30 ns trr and 95 pF junction capacitance support operation above 100 kHz, while the 125 A non-repetitive surge rating enables robust handling of inrush and transient events.

The TO-220AB package provides direct heatsink mounting capability with RthJC = 2°C/W when mounted on a fin-type heatsink (50 mm × 50 mm × 21 mm). Thermal derating follows a linear curve to zero amps at 150°C case temperature.

Key Specifications

Pinout & Package

Package: JEDEC TO-220AB, three-terminal through-hole package with metal tab electrically connected to cathode, designed for vertical mounting and heatsink attachment via screw or clip.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast rectifier applications.

Compared with STTH2002CW and GBPC3506, STPR2020CTW uniquely combines AEC-Q101 qualification, 30 ns trr, and dual-anode topology-enabling compact, high-efficiency, automotive-grade rectification where discrete channel control and thermal management are critical.

Availability

STPR2020CTW is available at Aetrix Electronics and suitable for switched-mode power supplies, automotive onboard chargers, and industrial motor drive auxiliary supplies requiring stable component supply and long-term production continuity.

Supply support for STPR2020CTW 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-performance, high-reliability components for power management, signal integrity, and protection applications.

The STPR series targets high-efficiency rectification in automotive, industrial, and computing power systems, emphasizing fast recovery, low conduction loss, and AEC-Q101-compliant reliability under harsh thermal and electrical stress.

FAQ

Is STPR2020CTW suitable for surface-mount assembly?

No. STPR2020CTW uses a through-hole TO-220AB package with leads designed for wave or hand soldering and mechanical heatsink mounting. It lacks SMD-compatible terminations or thermal pad design, and its 1.927 g mass exceeds typical reflow profile limits for SMT processes.

What is the maximum allowable case temperature for continuous 20 A operation?

The datasheet specifies 20 A average forward current at TC = 110°C. Operation above this case temperature requires derating per Figure 1: at TC = 125°C, maximum I(AV) drops to ~16 A; at TC = 150°C, it reaches zero. Exceeding 110°C without derating risks thermal runaway and premature failure.

Does the metal tab connect internally to a specific terminal?

Yes. The metal tab is electrically connected to the common cathode terminal. This is confirmed in the mechanical drawing and thermal test notes (RthJC measured with tab as thermal interface), and must be electrically isolated from other potentials unless the circuit design intentionally references the cathode to chassis ground.

Can STPR2020CTW replace a standard 1N5408 in a 24 V power supply?

No. While both are rectifiers, STPR2020CTW is rated for 200 V VRRM and 20 A I(AV), whereas 1N5408 is 1000 V / 3 A. Substituting it risks overvoltage failure in 1N5408's intended applications. Conversely, using 1N5408 in place of STPR2020CTW would cause thermal overload and catastrophic failure at 20 A due to higher VF and lower surge rating.