CDBMH340-G

Overview

The Comchip Technology CDBMH340-G is a Schottky Barrier Rectifier in the SOD-123T (Mini-SMA) surface-mount package. It features a repetitive peak reverse voltage of 40V and a continuous forward current rating of 3.0A. The device exhibits a maximum forward voltage drop of 0.70V at 3.0A and supports a maximum forward surge current of 80A for an 8.3ms half-sine wave. Operating characteristics include a typical thermal resistance of 20°C/W, a maximum reverse current of 50mA at rated voltage and 25°C, and a junction capacitance of approximately 250pF at 1MHz.

Feature Summary

• Utilizes silicon epitaxial planar chip technology with metal silicon junctions for ultra high-speed switching capabilities.
• Features a low profile surface mount design optimized to minimize board space requirements.
• Incorporates batch process design to ensure excellent power dissipation and improved thermal resistance.
• Provides guarding against overvoltage conditions while maintaining low power loss and high efficiency.

Applications

• Low profile surface mounted applications requiring optimized board space utilization
• High efficiency rectification circuits demanding low forward voltage drop
• Overvoltage protection systems utilizing high surge capability

Procurement Notes

Verify that the specific part number suffix matches the required voltage and current ratings, as the datasheet covers multiple variants within the series. Confirm compliance with MIL-STD-19500/228 environmental standards if lead-free specifications are mandatory. Ensure the ordering quantity aligns with standard reel packaging quantities to avoid partial reel handling issues during assembly.

Selection Notes

Select this component when a 40V reverse voltage rating and 3.0A continuous current capacity are required in a compact SOD-123T footprint. Consider the 0.70V forward voltage drop for efficiency calculations under full load conditions. Evaluate the 80A surge current capability against potential transient loads to ensure adequate safety margins for the specific application environment.

Part Context

This device belongs to the CDBMH Series of Schottky Barrier Rectifiers manufactured by Comchip Technology. The series encompasses various voltage ratings ranging from 20V to 100V, all sharing the same Mini-SMA/SOD-123T package style. These components are designed specifically for surface mount applications where space constraints and high switching speeds are critical design factors.

Replacement Considerations

Compatible substitutes within the same series include the CDBMH320-HF, CDBMH360-HF, CDBMH380-HF, and CDBMH3100-HF. Verify that any replacement maintains the identical SOD-123T package dimensions and pinout configuration to ensure mechanical compatibility without PCB redesign.

FAQ

What is the maximum forward surge current rating for the CDBMH340-G?

The maximum forward surge current is 80A, measured using an 8.3ms single half-sine wave superimposed on the rated load according to JEDEC methods.

Does the CDBMH340-G require external components for operation?

No external components are required for basic rectification operation. The device is a standalone silicon epitaxial planar chip with integrated metal silicon junctions designed for direct surface mounting.