403CMQ080 Equivalent & Substitute Parts

Part Overview

The 403CMQ080 is a Schottky diode module configured as a 1 Pair Common Cathode array rated for 80 V DC reverse voltage and 200 A average rectified current per diode. This component is designed for chassis mount applications in high-current rectification circuits. The original Vishay General Semiconductor part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers to maintain design continuity and ensure supply chain availability.

Substiute Parts

403CMQ080

Vishay General Semiconductor - Diodes DivisionIn Stock: 2395403CMQ080 Datasheet

Current PartRFQ

403CMQ080

SMC Diode SolutionsIn Stock: 2313403CMQ080 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 403CMQ080 is determined by strict equivalence across the following electrical and mechanical parameters:

• Diode Configuration: Must be 1 Pair Common Cathode
• Technology: Must be Schottky
• Voltage Rating: DC Reverse voltage must be 80 V (maximum)
• Current Rating: Average rectified current must be 200 A per diode
• Forward Voltage: Must be 830 mV at 200 A
• Recovery Speed: Must be Fast Recovery ≤ 500ns for currents > 200mA
• Reverse Leakage: Must be 6 mA at 80 V
• Temperature Range: Operating junction temperature must span -55°C to 175°C
• Mounting: Must be Chassis Mount configuration
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The 403CMQ080 from SMC Diode Solutions meets all electrical specifications and compliance requirements. The primary difference is the package type: the original uses TO-244AB while the substitute uses PRM4 (Isolated). Both are chassis mount configurations suitable for the specified application parameters.

Parameter Comparison

Engineering Selection Recommendations

The SMC Diode Solutions 403CMQ080 in PRM4 package is a direct electrical equivalent to the obsolete Vishay 403CMQ080 in TO-244AB package. Selection between these variants depends on mechanical integration requirements:

Vishay 403CMQ080 (TO-244AB): Original design specification. Obsolete status limits availability to existing inventory. Suitable only for legacy system maintenance or repair applications where original package geometry is required.

SMC Diode Solutions 403CMQ080 (PRM4): Active product status ensures ongoing supply chain availability. Identical electrical performance and compliance certifications (ROHS3, MSL 1, EAR99). The PRM4 isolated package provides equivalent chassis mount functionality. Recommended for new designs and production continuity.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating. Electrical performance is identical across all specified parameters: 80 V reverse voltage, 200 A rectified current, 830 mV forward voltage at 200 A, and -55°C to 175°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the SMC Diode Solutions PRM4 package directly replace the Vishay TO-244AB package?

A: Both packages are chassis mount configurations with identical electrical specifications. Physical mounting geometry differs between TO-244AB and PRM4 (Isolated). Mechanical compatibility depends on the specific PCB layout and mounting hardware of the application. Verify mounting hole spacing and lead configuration against your design documentation.

Q: What is the significance of the PRM4 (Isolated) designation?

A: The PRM4 (Isolated) package indicates electrical isolation properties in the package design. This does not affect the electrical performance parameters specified for the diode array itself. Isolation characteristics are determined by the package construction and do not alter the 80 V, 200 A, or thermal specifications.

Q: Are there compliance differences between the Vishay and SMC versions?

A: Both parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The Vishay part is REACH Unaffected while the SMC part is REACH Affected. Both carry EAR99 export classification and identical HTSUS code 8541.10.0080. Verify REACH compliance requirements for your specific application and jurisdiction.

Q: What electrical parameters must remain constant for substitution?

A: Substitution requires equivalence in: diode configuration (1 Pair Common Cathode), technology (Schottky), reverse voltage (80 V), rectified current (200 A per diode), forward voltage (830 mV @ 200 A), recovery speed (≤ 500ns), reverse leakage (6 mA @ 80 V), and operating temperature range (-55°C to 175°C). Deviation in any of these parameters disqualifies a part as a direct substitute.

Q: Why is the Vishay part listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The SMC Diode Solutions equivalent maintains active production status, ensuring availability for ongoing supply requirements. For applications currently using the Vishay part, transition to the SMC equivalent is necessary for long-term supply chain continuity.

Q: Are there inventory considerations for these parts?

A: Both parts show 2300 Pcs New Original In Stock. However, the Vishay part's obsolete status means existing inventory is finite and non-replenishable. The SMC part's active status ensures continued availability through normal distribution channels.