STMicroelectronics STTH1602CR

Overview

STTH1602CR from STMicroelectronics is a dual-center-tap ultrafast recovery silicon rectifier diode in I2PAK package, rated for 200 V repetitive peak reverse voltage, 16 A average forward current per device at Tc = 140°C, and 21 ns typical reverse recovery time. It delivers low conduction loss (VF = 0.78 V typ. at 150°C/8 A) and high thermal robustness (Tj(max) = 175°C), enabling use in high-frequency DC–DC converters and SMPS secondary-side rectification.

For engineers reviewing the STTH1602CR datasheet, STTH1602CR pinout, STTH1602CR application, or STTH1602CR equivalent, key selection criteria include verified ultrafast trr performance under dIF/dt = 100–200 A/µs, thermal resistance of 3.0 °C/W (junction-to-case, per diode), and dual-diode center-tap configuration supporting synchronous rectifier replacement in isolated flyback and forward topologies.

Technical Context

This dual-diode rectifier integrates two independent ultrafast epitaxial junctions in a single I2PAK thermally optimized package, with shared cathode connection forming a center-tapped output. Its low Qrr (typ. 20 nC at dIF/dt = 200 A/µs) and minimal IRM (6.8 A typ. at 125°C) reduce switching losses in hard-switched 100–500 kHz power stages.

The device operates with symmetrical electrical characteristics across both diodes - identical VRRM (200 V), trr (21 ns typ.), and VF (0.78 V typ. @ 150°C/8 A) - and supports parallel operation via matched dynamic parameters, making it suitable for interleaved or redundant low-voltage output rails in telecom and server PSUs.

Key Specifications

Pinout & Package

I2PAK (TO-262) package with insulated plastic body, 3-pin configuration, and metal tab electrically connected to cathode (K). Mounting hole accepts M3 screw; recommended torque 0.55 N·m. Tab provides primary thermal path and functional cathode connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast dual-center-tap rectifier applications.

Compared with STTH1602CT and STTH1602CFP, the STTH1602CR offers optimal thermal performance (3.0 °C/W per diode) in a low-profile surface-mountable I2PAK, making it preferred for space-constrained, high-power-density 12–48 V DC–DC designs where thermal management dominates over isolation requirements.

Availability

STTH1602CR is available at Aetrix Electronics and suitable for telecom DC–DC converters, server VRM modules, and industrial PLC power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STTH1602CR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The STTH1602C series belongs to ST's high-efficiency ultrafast diode product line, engineered specifically for high-frequency, low-loss rectification in switch-mode power supplies and isolated DC–DC converters demanding reliability at elevated junction temperatures.

FAQ

What is the maximum continuous forward current rating for STTH1602CR at 100°C case temperature?

At Tc = 100°C, the STTH1602CR supports 20 A average forward current per device (not per diode), as confirmed in the Absolute Ratings table on page 1 of the official ST datasheet (Doc ID 5767, Rev 1). This rating assumes proper heatsinking and accounts for thermal coupling between the two diodes in the I2PAK package.

Is the cathode (K) pin electrically isolated from the metal tab in the STTH1602CR I2PAK package?

No - the metal tab in the STTH1602CR I2PAK is internally connected to the common cathode (K) terminal. The package is not fully insulated; it is a standard I2PAK (TO-262), not the insulated TO-220FPAB variant. Electrical isolation requires an external insulator if mounting to a grounded heatsink.

Can STTH1602CR replace STTH1602CG in a D2PAK-based design without layout changes?

No - STTH1602CR (I2PAK) and STTH1602CG (D2PAK) have incompatible footprints and pin spacing. While electrically identical, their mechanical outlines differ: I2PAK uses 2.4 mm lead pitch and 13.1–13.6 mm length, whereas D2PAK specifies 2.54 mm pitch and 15.0–15.85 mm length. PCB redesign is required for substitution.

What is the typical reverse recovery charge (Qrr) at 125°C and dIF/dt = 200 A/µs?

The typical reverse recovery charge (Qrr) is 20 nC under conditions of Tj = 125°C, IF = 8 A, VR = 160 V, and dIF/dt = 200 A/µs, as shown in Figure 5 of the datasheet. This value is critical for estimating turn-off loss and snubber sizing in high-frequency flyback or forward converters.