Diodes Incorporated STPR1620CTW

Overview

STPR1620CTW from Diodes Incorporated is a superfast glass passivated rectifier diode rated for 200 V reverse voltage and 16 A average forward current at T_C = 100°C, with 125 A non-repetitive surge capability and 30 ns reverse recovery time. It serves as the main output rectifier in high-frequency DC-DC converters and SMPS secondary-side circuits where low conduction loss and fast switching are critical.

For engineers reviewing the STPR1620CTW datasheet, STPR1620CTW pinout, STPR1620CTW application, or STPR1620CTW equivalent, key selection criteria include its TO-220AB package thermal resistance (R_thJC = 3°C/W), 0.95 V forward voltage at 16 A/25°C, AEC-Q101 qualification, and 65 pF junction capacitance at 4 V/1 MHz.

Technical Context

This device is a dual-common-cathode superfast rectifier configured in a single TO-220AB package with three terminals: Anode1, Anode2, and Cathode. Its 30 ns reverse recovery time and low Q_rr support operation in 100–500 kHz switching topologies without excessive switching loss.

The 200 V V_RRM, 16 A I_(AV), and 125 A I_FSM ratings enable use in 48 V and 54 V output rails of telecom and industrial power supplies. Thermal performance is validated with R_thJC = 3°C/W on a 75 mm × 75 mm × 1.8 mm copper heatsink per JESD-51.

Key Specifications

Pinout & Package

Package: JEDEC TO-220AB, 3-terminal, through-hole, isolated tab (cathode-connected tab), green molding compound, RoHS and AEC-Q101 qualified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1602CW, STPR1620CTW delivers faster recovery and lower V_F with automotive qualification; versus VS-16CTQ020, it trades Schottky efficiency for 10× higher voltage rating and ruggedness in transient-prone environments.

Availability

STPR1620CTW is available at Aetrix Electronics and suitable for telecom DC-DC converters, industrial SMPS outputs, and automotive onboard charger auxiliary rails requiring stable component supply and AEC-Q101 compliance.

Supply support for STPR1620CTW 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 STPR series targets high-reliability power conversion applications, emphasizing superfast switching, thermal robustness, and automotive qualification for demanding industrial and transportation end equipment.

FAQ

Is STPR1620CTW pin-compatible with STTH1602CW?

Yes - both use identical TO-220AB pinout: Anode1 (lead 1), Anode2 (lead 2), and common cathode (tab). Mechanical mounting, PCB footprint, and thermal interface are interchangeable. Electrical differences (T_RR, V_F, qualification) require circuit-level validation but no layout change.

What is the maximum recommended case temperature for continuous 16 A operation?

The datasheet specifies I_(AV) = 16 A at T_C = 100°C. Operation above this requires derating per Figure 1: at T_C = 110°C, max I_(AV) drops to ~14.5 A; at T_C = 125°C, it falls to ~12 A. Thermal design must maintain case temperature ≤100°C under full load.

Does the cathode tab require electrical isolation from the heatsink?

Yes - the metal tab is electrically connected to the common cathode. If the heatsink is grounded or at a different potential, dielectric isolation (e.g., mica washer + thermal grease or isolating pad) is mandatory to prevent short circuits. Isolation voltage rating must exceed system peak reverse voltage.

Can STPR1620CTW replace a standard fast recovery diode like FR307 in a 24 V SMPS?

Yes - with benefits: 30 ns T_RR (vs. ~500 ns for FR307) cuts switching loss significantly, and 0.95 V V_F lowers conduction loss. However, verify layout clearance (TO-220AB is larger than DO-15), heatsink compatibility, and ensure the 200 V rating aligns with your reflected voltage margin - over-specification is acceptable but may increase cost.