STMicroelectronics STTH1512W

Overview

STTH1512W from STMicroelectronics is a 1200 V ultrafast recovery diode in DO-247 package, rated for 15 A average forward current and 200 A surge current, with 53 ns typical reverse recovery time (trr) at 125 °C and 200 A/µs dIF/dt. It delivers soft recovery (S = 1.5), low conduction loss (VF = 1.20 V typ. at 15 A, 150 °C), and high junction temperature capability (Tj = 175 °C), enabling use in high-frequency industrial rectification and freewheeling circuits.

For engineers reviewing the STTH1512W datasheet, STTH1512W pinout, STTH1512W application, or STTH1512W equivalent, key selection criteria include reverse recovery softness, thermal impedance (Rth(j-c) = 1.3 °C/W), insulation rating (DOP3I variant only), junction capacitance (12 pF), and compatibility with high-dI/dt snubber and bootstrap topologies.

Technical Context

This diode employs an optimized silicon epitaxial structure to achieve ultrafast, soft reverse recovery-critical for minimizing EMI and voltage overshoot in hard-switched PFC and motor drive inverters. Its low VF and high trr consistency across temperature (25–150 °C) support stable conduction loss modeling using P = 1.4 × IF(AV) + 0.027 × IF²(RMS).

The DO-247 package provides robust mechanical mounting and thermal path integrity, with no integrated insulation-unlike the DOP3I variant-but maintains full 1200 V VRRM rating and 175 °C Tj operation. Dynamic parameters are characterized under standardized conditions: IF = 15 A, dIF/dt = –200 A/µs, VR = 600 V, Tj = 125 °C.

Key Specifications

Pinout & Package

The STTH1512W uses the DO-247 surface-mount package (no insulation), featuring two terminals: Anode and Cathode. The package has no internal isolation barrier and relies on PCB layout for creepage/clearance compliance. Mounting requires solder reflow per JEDEC J-STD-020, with maximum lead temperature of 260 °C for 10 s.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast recovery diode applications.

Compared with MUR1512CT and VS-15EWH12, STTH1512W offers superior softness (S = 1.5) and lower Rth(j-c) (1.3 °C/W), making it preferred for high-dI/dt, EMI-critical freewheeling and snubber roles where voltage overshoot and thermal density are design constraints.

Availability

STTH1512W is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, induction heating systems, and UPS inverter stages requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.

Supply support for STTH1512W 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 industrial, automotive, and consumer markets.

The STTH ultrafast diode product line targets high-efficiency, high-reliability power conversion systems-specifically engineered for demanding rectification, freewheeling, and snubber functions in industrial and telecom infrastructure.

FAQ

Is STTH1512W RoHS-compliant and halogen-free?

Yes. STTH1512W is manufactured in ST's ECOPACK®2-compliant process, meeting RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21. The DO-247 package uses lead-free matte tin plating and epoxy meeting UL94 V0 flammability rating.

What is the recommended PCB footprint and thermal pad layout for STTH1512W?

The official DO-247 footprint (Figure 13, Doc ID 12157 Rev 2) specifies 10.80–11.30 mm terminal pitch, 19.85–20.15 mm body length, and 4.85–5.15 mm width. A 25 mm² copper thermal pad (2 oz) beneath the cathode tab is recommended to achieve the specified Rth(j-c) = 1.3 °C/W.

Can STTH1512W replace STTH1512PI in a design?

No-STTH1512PI uses the insulated DOP3I package (2500 V rms isolation, 12 pF capacitance), while STTH1512W is non-insulated DO-247. Substitution requires verifying creepage/clearance compliance, revising thermal interface design, and revalidating EMI due to different parasitic capacitance and mounting mechanics.

What is the maximum allowable dIF/dt for reliable operation of STTH1512W?

ST characterizes dynamic parameters up to 500 A/µs (Figures 4–8). For guaranteed reliability, ST recommends limiting dIF/dt to ≤300 A/µs in production designs-verified by measurement of IRM ≤28 A and trr ≤75 ns at Tj = 125 °C, ensuring margin against premature failure under transient overloads.