STMicroelectronics STTH15RQ06DY

Overview

STTH15RQ06DY from STMicroelectronics is an AEC-Q101-qualified ultrafast high-voltage rectifier diode in TO-220AC package, rated for 600 V repetitive peak reverse voltage, 15 A average forward current, and 25 ns maximum reverse recovery time at 25 °C. It serves as secondary-side rectifier in LLC full-bridge topologies, PFC stages, and automotive/industrial UPS and charging station power supplies.

For engineers reviewing the STTH15RQ06DY datasheet, STTH15RQ06DY pinout, STTH15RQ06DY application, or STTH15RQ06DY equivalent, key selection criteria include its soft recovery behavior (S-factor >1.0), low thermal resistance (1.5 °C/W junction-to-case), guaranteed V_RRM across –40 °C to +175 °C, and compliance with ECOPACK®2 environmental standards.

Technical Context

This diode employs platinum-doped silicon to achieve ultrafast switching with soft reverse recovery-critical for minimizing EMI and voltage overshoot in high-frequency LLC resonant converters. Its design targets high-efficiency secondary rectification where low conduction loss (V_F = 1.45 V max at 15 A, 150 °C) and fast, predictable trr (<70 ns at 125 °C, 400 V) are required.

Thermal performance is optimized via low R_th(j-c) (1.5 °C/W) and high T_j capability (–40 °C to +175 °C), enabling operation in constrained automotive under-hood environments and industrial power modules without derating. Creepage distance is not applicable for TO-220AC variant (only specified for D²PAK HV).

Key Specifications

Pinout & Package

TO-220AC package: single-anode, single-cathode, isolated metal tab (anode-connected). Mounting hole centered on tab; cathode lead is center pin (Pin 2), anode is tab and Pin 1 (source/drain configuration not applicable - this is a two-terminal diode).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH15R06DJ, STTH15RQ06DY offers mechanical robustness and simplified thermal mounting via TO-220AC tab, while IXYS MUR1560CT trades qualification and speed for broader distributor availability-but requires re-evaluation of EMI and thermal margins.

Availability

STTH15RQ06DY is available at Aetrix Electronics and suitable for automotive on-board chargers, industrial uninterruptible power supplies, and commercial air conditioning inverters requiring stable component supply and full AEC-Q101 compliance.

Supply support for STTH15RQ06DY 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

This device belongs to ST's "Automotive Turbo 2" ultrafast rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in resonant and hard-switched power converters operating above 100 kHz.

FAQ

Is STTH15RQ06DY pin-compatible with standard TO-220AC rectifiers like UF1506 or BYV26E?

Yes - STTH15RQ06DY uses industry-standard TO-220AC mechanical outline (per Table 7) with Pin 1 = anode/tab, Pin 2 = cathode. It replaces legacy ultrafast diodes in existing footprints, but verify layout clearance for 600 V creepage and thermal pad area per ST's recommended mounting torque (0.55 N·m).

What is the maximum recommended heatsink temperature for continuous 15 A operation?

At I_F(AV) = 15 A and T_C = 115 °C (case temperature), junction temperature remains within 175 °C limit. For reliable long-term operation, maintain heatsink temperature ≤95 °C to allow margin for ambient rise and thermal interface resistance - calculated using R_th(j-c) = 1.5 °C/W and measured case-to-heatsink resistance.

Does STTH15RQ06DY require snubber circuits in LLC full-bridge applications?

Snubbers are typically unnecessary due to its soft recovery behavior (S-factor >1.0) and low Q_RR (250 nC typ.), which suppress voltage spikes. However, empirical validation is required at system level - especially when dI_F/dt exceeds 300 A/µs or layout parasitics exceed 20 nH. Refer to AN4021 for reverse loss modeling.

How does ECOPACK®2 compliance affect soldering profile and board assembly?

ECOPACK®2 specifies halogen-free, lead-free compatible materials with standard Pb-free reflow profiles (peak 260 °C, 60 s max). No special prebake or moisture sensitivity handling is required (MSL 1). The TO-220AC package is not moisture-sensitive and may be assembled using standard convection or vapor-phase reflow.