STMicroelectronics STTH30RQ06W

Overview

STTH30RQ06W from STMicroelectronics is a 600 V, 30 A ultrafast high-voltage rectifier diode in DO-247 package, designed for secondary-side rectification in LLC full-bridge topologies and PFC stages. It delivers typ. 1.45 V forward voltage at 15 A/150 °C, 30 ns max reverse recovery time, and 175 °C maximum junction temperature-enabling high-efficiency, high-power-density AC/DC and industrial power supplies.

For engineers reviewing the STTH30RQ06W datasheet, STTH30RQ06W pinout, STTH30RQ06W application, or STTH30RQ06W equivalent, key selection criteria include ultrafast soft-recovery behavior (S-factor >1.0), low thermal resistance (R_th(j-c) = 0.70 °C/W), creepage distance compliance (5.38 mm anode-to-cathode with coating), and ECOPACK2 environmental compliance for high-reliability industrial and charging infrastructure designs.

Technical Context

This ultrafast rectifier employs optimized silicon epitaxial structure and tailored carrier lifetime control to achieve soft reverse recovery-minimizing voltage overshoot and EMI in hard-switched and resonant converters. Its dynamic performance is characterized under standardized conditions: I_F = 0.5 A, I_R = 1 A, I_rr = 0.25 A, dI_F/dt = −50 A/µs at T_j = 25 °C.

The device supports high surge capability (180 A I_FSM for 10 ms sinusoidal pulse) and operates reliably up to 175 °C junction temperature. Thermal management is enabled by low R_th(j-c) and compatibility with standard heatsink mounting via insulated tab-critical for UPS, air conditioning inverters, and EV charging station front-end rectifiers.

Key Specifications

Pinout & Package

STTH30RQ06W is housed in a DO-247 package-a surface-mount-compatible, high-power discrete diode package with insulated metal tab for direct heatsink mounting. The package features UL94 V0 epoxy, 0.8 N·m recommended mounting torque, and 5.38 mm minimum creepage distance between anode and cathode (with top coating).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH30R06D and MUR3060CT, STTH30RQ06W offers superior thermal performance (0.70 vs. ≥0.90 °C/W), certified creepage compliance (5.38 mm), and documented soft recovery-making it the optimal choice for high-reliability, high-frequency, and safety-critical AC/DC power conversion.

Availability

STTH30RQ06W is available at Aetrix Electronics and suitable for LLC resonant converters, industrial UPS systems, and EV charging station power modules requiring stable component supply, long-lifecycle support, and traceable sourcing for production ramp-up.

Supply support for STTH30RQ06W 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.

STTH30RQ06W belongs to ST's high-voltage ultrafast rectifier product line-engineered specifically for high-efficiency, high-reliability power conversion in resonant topologies, PFC circuits, and industrial-grade power supplies.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH30RQ06W is rated for I_F(AV) = 30 A at T_C = 103 °C, meaning the case temperature must not exceed 103 °C under continuous DC or square-wave forward current conditions. Exceeding this limit requires derating per Figure 1 in DS12164, and junction temperature must remain ≤175 °C.

Does STTH30RQ06W require a heatsink in typical 30 A applications?

Yes-due to its 0.70 °C/W R_th(j-c), a heatsink is mandatory to maintain T_j ≤175 °C at 30 A. For example, with 1.45 V V_F and 30 A I_F(AV), conduction loss is ~43.5 W; using a 1.5 °C/W heatsink yields T_j ≈ 103 °C + (43.5 × 2.2) ≈ 200 °C-so a lower-R_th heatsink or forced airflow is required.

How does the DO-247 package differ from D²PAK HV in creepage performance?

The DO-247 package achieves 5.38 mm minimum anode-to-cathode creepage *with top coating*, matching the D²PAK HV specification. However, DO-247 uses a single-tab construction with gull-wing lead, while D²PAK HV has a larger footprint and different thermal pad geometry-making DO-247 more suitable for high-density layouts where creepage and thermal performance are both critical.

Is STTH30RQ06W suitable for synchronous rectification replacement?

No-STTH30RQ06W is a unidirectional, passive silicon rectifier diode and cannot replace active MOSFET-based synchronous rectifiers. It lacks gate control, body diode optimization, or low R_DS(on); its role is complementary-used where simplicity, ruggedness, and zero gate-drive overhead are prioritized over peak efficiency in <10 kW designs.