STMicroelectronics STTH30RQ06WL

Overview

STTH30RQ06WL from STMicroelectronics is a 600 V, 30 A ultrafast high-voltage rectifier diode in DO-247 LL package, designed for secondary-side rectification in LLC full-bridge topologies and PFC stages. It delivers soft recovery behavior (trr ≤ 30 ns at 25 °C), low thermal resistance (Rth(j-c) = 0.90 °C/W), and 175 °C maximum junction temperature - enabling high-efficiency, high-power-density AC/DC and industrial power supplies.

For engineers reviewing the STTH30RQ06WL datasheet, STTH30RQ06WL pinout, STTH30RQ06WL application, or STTH30RQ06WL equivalent, key selection criteria include reverse recovery time under high dIF/dt, forward voltage drop at 150 °C (VF = 1.45 V typ.), creepage distance (5.38 mm min. anode-to-cathode with coating), and thermal performance in forced-air or heatsink-mounted configurations.

Technical Context

This ultrafast rectifier employs optimized silicon epitaxy and lifetime control to achieve soft reverse recovery (S-factor > 1.0 at 125 °C), minimizing EMI and voltage overshoot during turn-off in high-frequency switching converters. Its low QRR (485 nC) and controlled IRM (8–11 A) reduce switching losses in resonant and hard-switched topologies operating up to 300 kHz.

The DO-247 LL package provides enhanced thermal dissipation via direct metal tab mounting and meets IEC 60664-1 creepage requirements (5.38 mm anode-to-cathode with top coating), making it suitable for reinforced insulation in 600 V-class industrial and EV charging applications where safety spacing and thermal reliability are critical.

Key Specifications

Pinout & Package

STTH30RQ06WL uses the DO-247 LL package: insulated metal tab (cathode), single lead (anode), and integrated creepage-enhancing top coating. Mounting requires 0.8 N·m torque on M3 screw; thermal interface must cover full tab area (13.46 × 15.87 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH30RQ06WL, STTH30R06DJ offers superior thermal resistance but less flexible mounting, while MUR3060PT trades verified safety spacing and eco-compliance for broader vendor availability - making STTH30RQ06WL optimal for new designs prioritizing safety, efficiency, and thermal reliability in space-constrained industrial systems.

Availability

STTH30RQ06WL is available at Aetrix Electronics and suitable for LLC resonant converters, PFC boost stages, and EV charging station rectifiers requiring stable component supply, long-term lifecycle support, and certified high-voltage isolation.

Supply support for STTH30RQ06WL 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

STTH30RQ06WL belongs to ST's high-voltage ultrafast rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in industrial UPS, server PSUs, and EV infrastructure where soft recovery, thermal robustness, and safety-certified packaging are essential.

FAQ

What is the maximum recommended mounting torque for the STTH30RQ06WL DO-247 LL package?

The manufacturer specifies a recommended torque value of 0.8 N·m and a maximum torque of 1.0 N·m for the M3 mounting screw. Exceeding 1.0 N·m risks mechanical damage to the internal die attach or tab insulation layer, potentially causing premature thermal failure or short-circuit risk. Always use calibrated torque tools and verify flatness of the heatsink mating surface before installation.

Does STTH30RQ06WL support bidirectional current flow in synchronous rectification circuits?

No - STTH30RQ06WL is a unidirectional ultrafast rectifier diode. It conducts only from anode to cathode and cannot be actively controlled like a MOSFET. For synchronous rectification, discrete MOSFETs (e.g., STL220N6F7) or dedicated SR controllers must be used; this diode serves only as a passive, high-performance freewheeling or clamp element.

How does the DO-247 LL package's creepage distance compare to D²PAK HV in safety-critical designs?

Both packages provide 5.38 mm minimum anode-to-cathode creepage *with top coating*, meeting IEC 60664-1 requirements for 600 V working voltage. However, DO-247 LL achieves this with a longer, more rigid leadframe and larger tab area, offering higher mechanical stability under thermal cycling - critical for field-deployed EV chargers where vibration and thermal fatigue are concerns.

Can STTH30RQ06WL replace STTH30RQ06W in existing designs?

Yes - STTH30RQ06WL is a direct mechanical and electrical upgrade of STTH30RQ06W (DO-247), sharing identical VRRM, IF(AV), trr, and VF specs. The LL variant adds improved thermal resistance (0.90 vs. 1.05 °C/W), enhanced creepage margin, and tighter mechanical tolerances. No circuit redesign is needed, but heatsink mounting pressure and torque must follow DO-247 LL specifications (0.8 N·m).