STMicroelectronics STTH30ACS06W

Overview

STTH30ACS06W from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in DO-247 package, rated for 600 V repetitive peak reverse voltage, 30 A average forward current, and 30 ns maximum reverse recovery time at 25 °C. It serves as a boost diode in interleaved PFC stages of air conditioning systems and as a freewheeling diode in high-efficiency SMPS.

For engineers reviewing the STTH30ACS06W datasheet, STTH30ACS06W pinout, STTH30ACS06W application, or STTH30ACS06W equivalent, key selection criteria include trr ≤ 30 ns, VF(typ) = 1.45 V at 150 °C, Rth(j-c) = 1.2 °C/W, IF(AV) = 30 A, and suitability for continuous-conduction-mode PFC and high-dI/dt freewheeling.

Technical Context

This device implements ST's Turbo 2 600 V technology, optimized for low conduction and switching losses in high-frequency power conversion. Its ultrafast recovery (trr ≤ 30 ns at IF = 0.5 A) and soft recovery behavior (softness factor > 1) minimize voltage overshoot and EMI during turn-off.

Thermal performance is enhanced by low junction-to-case thermal resistance (1.2 °C/W), enabling high-power operation with conductive cooling. The diode exhibits low reverse leakage (≤300 µA at 150 °C, VR = VRRM) and stable VF across temperature (1.45 V typ at 150 °C, IF = 30 A).

Key Specifications

Pinout & Package

STTH30ACS06W is housed in a DO-247 through-hole package with two terminals: anode and cathode. The case is electrically isolated and designed for conductive cooling via mounting screw (recommended torque: 0.8 N·m). Dimensions comply with ST's mechanical drawing (L = 20.0 mm, H = 15.6 mm, Dia = 3.6 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH30ACS06W, the IXYS part adds dual-diode integration but sacrifices speed and forward drop, while the Vishay part matches form-factor and function most closely-though with marginal thermal and conduction penalties affecting high-density thermal designs.

Availability

STTH30ACS06W is available at Aetrix Electronics and suitable for air conditioning PFC modules, industrial SMPS designs, motor drive clamping circuits, and UPS inverter output stages requiring stable component supply and long-term production continuity.

Supply support for STTH30ACS06W 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The STTH series belongs to ST's high-voltage rectifier product line, engineered specifically for ultrafast switching in energy-efficient AC-DC and DC-DC power conversion systems demanding low trr, low VF, and high thermal robustness.

FAQ

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

The STTH30ACS06W has a maximum operating junction temperature of +175 °C. This rating allows sustained operation in thermally constrained environments such as sealed HVAC enclosures or high-ambient industrial PSUs. Operating consistently above 150 °C accelerates parametric drift and increases reverse leakage, so thermal design must maintain Tj ≤ 150 °C for >10-year field life.

Is STTH30ACS06W suitable for use in synchronous rectification topologies?

No - STTH30ACS06W is a unidirectional, non-controlled rectifier and lacks gate control or bidirectional conduction capability. It functions only as a passive freewheeling or boost diode. For synchronous rectification, discrete MOSFETs or dedicated SR controllers (e.g., STSR3) paired with logic-level FETs are required.

How does the DO-247 package differ from TO-247 in thermal performance?

The DO-247 package uses a metal slug base for direct thermal conduction, achieving Rth(j-c) = 1.2 °C/W - matching or exceeding many TO-247 variants. Unlike TO-247, DO-247 has no insulated tab; its case is electrically connected to the cathode, requiring isolation between heatsink and circuit ground unless cathode is at ground potential.

Can STTH30ACS06W replace standard fast recovery diodes in existing 600 V designs?

Yes - with verified layout review. Its 30 ns trr and soft recovery reduce voltage spikes and EMI compared to standard fast diodes (e.g., 100–200 ns trr). However, PCB trace inductance must be minimized, and snubber components may require re-tuning due to faster switching edge rates and lower IRM-induced ringing.