STTH6002CW [STMicroelectronics]

Product Overview

The STMicroelectronics STTH6002CW is a 200 V dual common-cathode ultrafast rectifier designed for switch-mode power supplies and high-frequency DC/DC converters. It integrates two rectifier diodes rated at 30 A average forward current each, providing a combined device rating of 60 A under the specified thermal and duty-cycle conditions.

The device combines low forward voltage with fast recovery characteristics to help limit conduction and switching losses. Its common-cathode arrangement is suitable for center-tapped rectification, while its current capability supports power-conversion circuits requiring substantial load current. ST also identifies low-voltage high-frequency inverters, freewheeling, and polarity protection as intended applications. 

The exact STTH6002CW ordering code uses a three-lead TO-247 through-hole package and is supplied in tubes. ST lists this version as an active industrial-grade product with ECOPACK2 compliance.

Part Number Breakdown

The manufacturer’s ordering diagram defines CW together as the TO-247 designation. The exact STTH6002CW version is tube-packed; the alternative STTH6002CPI uses a different package.

Key Parameters

Competitive Advantages

Key Features

1. Dual Common-Cathode Configuration

Two diodes share a common cathode, providing a convenient arrangement for center-tapped rectifier circuits.

Advantages:

• Combines two rectifying elements in one package
• Simplifies the common output connection
• Supports compact secondary-side rectifier layouts

2. High-Current Rectification

Each diode supports 30 A average forward current under the specified conditions, with a 60 A combined device rating.

Advantages:

• Supports high-current power-conversion stages
• Allows both rectifier branches to share one mounting location
• Provides a practical option for demanding secondary-side loads

3. Ultrafast Reverse Recovery

Reverse recovery time is typically 22 ns under the datasheet’s 1 A test conditions. Recovery behavior varies with current, temperature, and switching conditions.

Advantages:

• Helps reduce recovery-related switching losses
• Supports high-frequency rectification
• Limits the duration of reverse-recovery conduction

4. Low Forward Voltage

At 30 A and a junction temperature of 150°C, the forward voltage is typically 0.75 V and no more than 0.84 V.

Advantages:

• Helps limit conduction losses
• Reduces rectifier heat generation
• Supports efficient high-current output stages

5. Non-Repetitive Surge Capability

The device has a 330 A non-repetitive surge rating for the specified 10 ms sinusoidal waveform. This is a transient limit, not a repetitive operating-current rating.

Advantages:

• Provides margin for appropriately controlled startup transients
• Supports assessment of short-duration overload events
• Helps designers coordinate rectifier and protection ratings

6. TO-247 Thermal Design

The through-hole TO-247 package supports conduction cooling, with a junction-to-case thermal resistance of 1.2°C/W per diode. Maximum operating junction temperature is 175°C.

Advantages:

• Accommodates heatsink-based cooling
• Supports thermal analysis of both diode branches
• Provides a familiar power-package mounting format

Electrical performance remains subject to the datasheet’s test conditions and thermal limits.

Applications

Switch-Mode Power Supplies

• Center-tapped secondary rectification
• High-current DC output stages
• Industrial switching power supplies

DC/DC Conversion and Inverters

• High-frequency DC/DC converter rectifiers
• Low-voltage inverter power stages
• Transformer-coupled converter outputs

Freewheeling and Polarity Protection

• Freewheeling paths for compatible switching circuits
• Inductive-current recirculation
• Diode-based polarity protection

These examples fit the application categories identified by ST. Actual suitability depends on circuit topology, reverse-voltage transients, current waveform, and cooling.