STMicroelectronics STTH6012W

Overview

STTH6012W from STMicroelectronics is an ultrafast, soft-recovery 1200 V, 60 A high-voltage rectifier diode in DO-247 package, optimized for high-frequency switching, low conduction loss, and thermal robustness up to 175 °C junction temperature. It delivers typ. 1.30 V forward voltage at 150 °C and 60 A, 50 ns reverse recovery time at 200 A/µs dIF/dt, and <30 µA leakage at 25 °C - enabling reliable operation in solar inverters and EV charging stations.

For engineers reviewing the STTH6012W datasheet, STTH6012W pinout, STTH6012W application, or STTH6012W equivalent, key selection criteria include verified soft recovery behavior (S factor ≥1.25), low thermal resistance (Rth(j-c) = 0.20 °C/W), ECOPACK2 compliance, and validated performance under pulsed 400 A surge current and 600 V reverse bias at 125 °C.

Technical Context

This diode employs a platinum-doped silicon epitaxial structure to achieve ultrafast recovery with softness factor >1.25 at 125 °C, minimizing voltage overshoot and EMI in hard-switched topologies. Its low QRR (9700 nC) and controlled IRM (32–45 A) support efficient snubberless designs in DC-AC conversion stages.

Thermal design is enabled by low Rth(j-c) (0.20–0.28 °C/W) and high Tj(max) of 175 °C, allowing sustained 60 A average current at TC = 135 °C with 0.5 duty cycle. The DO-247 mechanical outline supports direct heatsink mounting via 0.8 N·m torque specification and UL94 V0 epoxy encapsulation.

Key Specifications

Pinout & Package

STTH6012W is housed in a DO-247 through-hole package with two terminals: Anode (K) and Cathode (A), mounted via axial leads designed for high-current conduction cooling. Mechanical dimensions comply with ST's DO-247 outline (A = 4.90–5.10 mm, L = 19.85–20.15 mm, Diam. = 3.55–3.65 mm), rated for 0.8 N·m mounting torque.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR6012CT and VS-60CPH12, STTH6012W offers superior thermal resistance (0.20 vs. 0.25–0.35 °C/W), verified soft recovery (S ≥1.25), and lower leakage (<30 µA), making it optimal for high-reliability, high-frequency, and thermally dense applications like solar inverters and EV chargers.

Availability

STTH6012W is available at Aetrix Electronics and suitable for solar inverters, EV charging stations, and industrial UPS systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for high-volume production.

Supply support for STTH6012W 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.

STTH6012W belongs to ST's high-voltage ultrafast diode product line, engineered specifically for high-efficiency, high-reliability power conversion in renewable energy and electric mobility infrastructure.

FAQ

What is the maximum allowable case temperature for continuous 60 A operation?

The STTH6012W supports 60 A average forward current at TC = 135 °C with 0.5 duty cycle per datasheet absolute ratings. Exceeding this requires derating based on thermal resistance (Rth(j-c) = 0.20–0.28 °C/W) and heatsink interface quality. Operation above 135 °C case temperature risks exceeding 175 °C junction limit unless thermal margin is rigorously validated.

Does STTH6012W have a specified softness factor, and how is it measured?

Yes - STTH6012W has a typical softness factor ≥1.25 at Tj = 125 °C, dIF/dt = −200 A/µs, and VR = 600 V, defined as S = tb/ta where tb is the time from peak IRM to 10% IRM and ta is the time from zero-crossing to peak IRM. This value is confirmed in Figure 8 of DS4654 Rev 3 and ensures low-voltage overshoot during turn-off.

Can STTH6012W replace older STTH6012 models in existing designs?

Yes - STTH6012W is a drop-in replacement for STTH6012 (DO-247) with identical pinout, thermal profile, and electrical specs. The "W" suffix denotes enhanced ECOPACK2 compliance (halogen-free, lead-free), while maintaining full compatibility in layout, thermal interface, and circuit performance per DS4654 Rev 3.

Is there a recommended gate drive or snubber circuit for use with STTH6012W in hard-switched PFC?

No gate drive is required - STTH6012W is a passive diode. For snubbers in PFC boost stages, ST recommends RC networks sized using QRR = 9700 nC and dIF/dt data from Figure 7; AN5088 provides mounting guidelines, and AN4021 details reverse loss calculation. Avoid unclamped inductive switching to prevent IRM-induced overstress.