STMicroelectronics STTH15AC06CT

Overview

STTH15AC06CT from STMicroelectronics is a dual common-cathode ultrafast high-voltage silicon rectifier diode in TO-220AB package, rated for 600 V repetitive peak reverse voltage, 15 A total average forward current (7.5 A per diode), and 25 ns maximum reverse recovery time. It serves as a boost diode in interleaved PFC stages of air conditioning systems and as a freewheeling diode in industrial switch-mode power supplies.

For engineers reviewing the STTH15AC06CT datasheet, STTH15AC06CT pinout, STTH15AC06CT application, or STTH15AC06CT equivalent, key selection criteria include ultrafast trr performance under high dIF/dt, low conduction loss at 150 °C junction temperature, insulated thermal path capability, and dual-diode configuration for space-constrained PFC topologies.

Technical Context

The STTH15AC06CT integrates two independent ultrafast epitaxial planar diodes in a single TO-220AB package with common cathode connection. Its Turbo 2 technology enables low Qrr (typ. 40 nC at 125 °C) and soft reverse recovery (SFACTOR > 1.5), minimizing EMI and voltage overshoot during hard-switching transitions.

Designed for continuous conduction mode (CCM) operation, it supports high-frequency PFC (≥50 kHz) with VF(max) = 1.5 V at 7.5 A/150 °C and Rth(j–c) = 1.7 °C/W (total device), enabling efficient thermal coupling to heatsinks without isolation pads in non-safety-isolated designs.

Key Specifications

Pinout & Package

TO-220AB package: non-insulated, 3-pin, vertical mounting, screw-terminal compatible (0.4–0.6 N·m torque). Cathode tab is electrically connected to pin 2 and metal tab; pins 1 and 3 are anodes (A1, A2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast high-voltage rectifier applications.

Compared with MUR1560CT and VS-15EWH06-M3, STTH15AC06CT uniquely delivers dual common-cathode topology with industry-leading 25 ns trr and 1.5 V VF in TO-220AB-enabling compact, high-efficiency interleaved PFC without sacrificing thermal or EMI performance.

Availability

STTH15AC06CT is available at Aetrix Electronics and suitable for air conditioning PFC modules, industrial SMPS designs, and UPS input rectification requiring stable component supply and long-term production continuity.

Supply support for STTH15AC06CT 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, specializing in power management, analog, microcontrollers, and automotive-grade ICs.

The STTH series belongs to ST's Turbo 2 ultrafast diode product line, engineered specifically for high-frequency, high-efficiency power conversion in consumer, industrial, and HVAC applications where low Qrr and soft recovery are critical.

FAQ

What is the maximum junction temperature and how does it affect thermal design?

The STTH15AC06CT has a maximum junction temperature (Tj) of 175 °C. This allows operation in high-ambient environments such as enclosed HVAC cabinets without significant derating. At 15 A total IF(AV), its 1.7 °C/W Rth(j–c) requires a heatsink with ≤35 °C/W thermal resistance to maintain Tj ≤125 °C under worst-case convection cooling.

Is the metal tab electrically isolated in the STTH15AC06CT package?

No-the TO-220AB package used in STTH15AC06CT is non-insulated. The metal tab is internally connected to pin 2 (common cathode) and must be electrically referenced to the DC bus positive rail. For isolation, ST offers the STTH15AC06CFP variant in TO-220FPAB (2500 VDC insulation).

How does the dual common-cathode configuration improve PFC efficiency?

The dual common-cathode structure eliminates separate cathode traces and reduces loop inductance between diodes and output capacitors. In interleaved PFC, this cuts high-frequency ringing by up to 40% and lowers total conduction + switching loss by 1.2–1.8 W per diode pair compared to discrete solutions at 100 kHz.

Can STTH15AC06CT replace STTH15AC06CFP in existing designs?

Only if electrical isolation is not required. STTH15AC06CT uses TO-220AB (non-insulated), while STTH15AC06CFP uses TO-220FPAB (2500 VDC isolation). Substitution may compromise safety certification in medical or industrial equipment requiring reinforced insulation-thermal and electrical specs are otherwise identical.