CPT40145

Diode Arrays Overview

The Microsemi CPT40145 is a silicon Schottky barrier rectifier in the PowerMod package, rated for 200 A average forward current and 45 V repetitive peak reverse voltage. It features a common cathode configuration with two elements. The device supports an operating junction temperature range of -55°C to 150°C and a storage temperature range of -55°C to 150°C. Key electrical parameters include a maximum instantaneous forward voltage of 0.57 V per leg at 200 A and 25°C, and a typical junction capacitance of 7000 pF per leg. The maximum surge current is 3000 A (8.3 ms half-sine). Thermal resistance from junction to case is 0.16°C/W, and from case to sink is 0.32°C/W.

Diode Arrays Feature Summary

• Schottky barrier construction provides fast switching speed and low forward voltage drop.
• Guard ring protection enhances reliability against transient voltage events.
• Flange mount package design facilitates efficient heat dissipation via baseplate mounting.
• Common cathode configuration integrates dual elements within a single housing.

Diode Arrays Applications

• High-current DC power supply rectification
• Free-wheeling diodes in high-frequency inverters
• Industrial motor drive systems
• Battery charging circuits

Diode Arrays Procurement Notes

Verify the specific suffix designation when ordering, as 'A' indicates a common anode configuration and 'D' denotes a doubler configuration, which alters the internal circuit topology compared to the standard common cathode version. Confirm RoHS compliance status with the supplier, as historical data indicates non-compliance for certain manufacturing runs. Ensure the procurement documentation matches the exact part number including any suffixes to guarantee correct pinout and electrical characteristics for the intended application.

Diode Arrays Selection Notes

Select the CPT40145 for applications requiring high current handling with low conduction losses. The 45 V rating suits low-voltage, high-amperage systems. Evaluate thermal management requirements carefully, utilizing the specified junction-to-case and case-to-sink thermal resistances for heatsink calculations. Consider the 3000 A surge capability for inrush current scenarios. Compare against similar parts like the CPT40130 or CPT40140 if different voltage ratings are needed while maintaining the same current and package constraints.

Diode Arrays Part Context

The CPT40145 belongs to the CPT40130-CPT40145 series of Schottky PowerMod rectifiers from Microsemi. This family shares identical physical dimensions and thermal characteristics, differing primarily in their repetitive peak reverse voltage ratings ranging from 30 V to 45 V. All variants offer 200 A average forward current and utilize the robust flange-mount PowerMod package designed for high-power industrial and commercial applications.

Diode Arrays Replacement Considerations

Direct replacements within the same series include CPT40130 (30V), CPT40135 (35V), and CPT40140 (40V) if lower voltage ratings are acceptable. Cross-brand equivalents must match the 200 A current, 45 V reverse voltage, and PowerMod flange-mount package dimensions. Verify that alternative components meet the same thermal resistance and surge current specifications to ensure system compatibility without redesign.

Diode Arrays FAQ

What is the difference between the standard CPT40145 and the CPT40145A?

The standard CPT40145 features a common cathode configuration. The CPT40145A suffix indicates a common anode configuration, which changes the polarity arrangement of the internal diode elements.

How is the CPT40145 mounted thermally?

The device uses a flange mount design. The center hole must be torqued first, followed by the outside holes. Maximum torque for terminals is 30-40 inch pounds, and for the mounting base center hole, it is 8-10 inch pounds.

What is the maximum surge current rating for this component?

The maximum repetitive peak forward surge current is 3000 Amperes, measured under conditions of an 8.3 ms half-sine wave pulse with an initial junction temperature of 150°C.