STMicroelectronics STTH30R04W

Overview

STTH30R04W from STMicroelectronics is an ultrafast recovery diode in DO-247 package, rated for 400 V repetitive peak reverse voltage, 30 A average forward current, and 24 ns typical reverse recovery time at 25 °C. It delivers low conduction loss (VF = 0.97 V at 30 A/150 °C), high junction temperature capability (175 °C), and low thermal resistance (1.15 °C/W junction-to-case), making it suitable for high-frequency switching power supplies and PFC stages.

For engineers reviewing the STTH30R04W datasheet, STTH30R04W pinout, STTH30R04W application, or STTH30R04W equivalent, key selection criteria include reverse recovery time under high dIF/dt conditions, thermal performance at Tc = 120 °C, leakage current stability up to 125 °C, and mechanical compatibility with DO-247 mounting requirements.

Technical Context

The STTH30R04W employs a planar epitaxial silicon structure optimized for ultrafast soft recovery, minimizing voltage overshoot and EMI during turn-off. Its dynamic behavior is characterized by trr = 24 ns (typ) at IF = 1 A, dIF/dt = −200 A/µs, VR = 30 V, and IRM = 10–14 A under harsher conditions (IF = 30 A, dIF/dt = −200 A/µs, VR = 320 V, Tj = 125 °C).

Thermal design is enabled by Rth(j-c) = 1.15 °C/W and Tj(max) = 175 °C, supporting operation with case temperatures up to 120 °C at full 30 A rating. Reverse leakage remains tightly controlled: IR ≤ 15 µA at 25 °C and ≤ 150 µA at 125 °C under VRRM.

Key Specifications

Pinout & Package

STTH30R04W uses the DO-247 through-hole package with two terminals: anode and cathode. The package features a metal tab for thermal conduction and mechanical mounting, with no internal gate or control pins. Mounting torque must not exceed 0.7 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR3040PT and VS-30EWH04-M3, STTH30R04W offers the best balance of ultrafast recovery (24 ns), low VF (0.97 V), and thermal resistance (1.15 °C/W) in DO-247, making it optimal for high-frequency, thermally constrained industrial power stages.

Availability

STTH30R04W is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, solar inverter boost stages, and uninterruptible power supplies requiring stable component supply and long-term manufacturing continuity.

Supply support for STTH30R04W 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 industrial, automotive, and consumer markets.

The STTH series targets high-reliability power conversion applications, with STTH30R04W specifically engineered for ultrafast, high-current rectification where low loss, thermal robustness, and soft recovery are mandatory.

FAQ

What is the maximum allowable case temperature for continuous 30 A operation?

The STTH30R04W is rated for IF(AV) = 30 A at Tc = 120 °C per Table 2. Operation above this temperature requires linear derating; at Tc = 135 °C, maximum average current drops to approximately 24 A to maintain Tj ≤ 175 °C using Rth(j-c) = 1.15 °C/W.

Does STTH30R04W have a built-in thermal protection feature?

No, STTH30R04W is a passive discrete diode without integrated thermal sensing or shutdown circuitry. Thermal protection must be implemented externally via heatsink temperature monitoring or system-level current/voltage limiting based on its absolute maximum ratings and thermal impedance profile.

Can STTH30R04W replace STTH30L04 in existing designs?

Yes, but with caution: STTH30L04 has lower VRRM (400 V same) but slower trr (≈50 ns) and higher VF (1.05 V typ). STTH30R04W improves switching efficiency and EMI but may require re-evaluation of snubber networks due to faster recovery and reduced stored charge (QRR).

Is the DO-247 package of STTH30R04W compatible with automated through-hole assembly?

Yes - the DO-247 package is designed for wave soldering and selective soldering processes. Its lead pitch (F = 1.0–1.4 mm), body dimensions (L = 19.85–20.15 mm), and tab geometry support standard AOI inspection and automated insertion, though manual torque control (≤0.7 N·m) is required for mechanical reliability.