440CMQ030 Equivalent & Substitute Parts

Part Overview

The 440CMQ030 is a Schottky diode array module configured as a 1 Pair Common Cathode rectifier rated for 30 V DC reverse voltage and 220 A average rectified current per diode. Manufactured by Vishay General Semiconductor - Diodes Division, this component is housed in a TO-244AB package for chassis mount applications.

The 440CMQ030 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this rectifier module.

Substiute Parts

440CMQ030

Vishay General Semiconductor - Diodes DivisionIn Stock: 1110440CMQ030 Datasheet

Current PartRFQ

440CMQ030

SMC Diode SolutionsIn Stock: 1148440CMQ030 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 440CMQ030 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Parameters (Must Match):

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 30 V
• Current - Average Rectified (Io) (per Diode): 220 A
• Voltage - Forward (Vf) (Max) @ If: 500 mV @ 220 A
• Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
• Current - Reverse Leakage @ Vr: 20 mA @ 30 V
• Operating Temperature - Junction: -55°C ~ 150°C

Mechanical Parameters (Must Match):

• Mounting Type: Chassis Mount
• Base Product Number: 440CMQ

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts may differ in package designation (TO-244AB versus PRM4) provided all electrical specifications and mounting requirements remain equivalent. Package differences reflect alternative mechanical implementations of the same electrical functionality.

Parameter Comparison

Engineering Selection Recommendations

The 440CMQ030 manufactured by SMC Diode Solutions represents a direct electrical and functional equivalent to the obsolete Vishay 440CMQ030. Both components satisfy identical electrical specifications across all critical parameters: 30 V reverse voltage rating, 220 A average rectified current, 500 mV forward voltage drop at rated current, and fast recovery Schottky technology.

The SMC Diode Solutions variant carries Active product status, ensuring ongoing availability and supply chain support. Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity classification, confirming equivalent environmental and regulatory standing.

The primary mechanical difference is the package designation: TO-244AB (Vishay) versus PRM4 (SMC Diode Solutions). Both packages support chassis mount applications. PCB layout and thermal management considerations must account for package-specific footprint and mounting geometry differences.

Selection of the SMC Diode Solutions 440CMQ030 is appropriate for applications requiring continued supply of this rectifier module specification, particularly where the Vishay component is no longer available through standard distribution channels.

Frequently Asked Questions (FAQ)

Q: Can the SMC Diode Solutions 440CMQ030 directly replace the Vishay 440CMQ030 in existing designs?

A: Electrical substitution is direct. All electrical parameters, including voltage rating, current capacity, forward voltage drop, and temperature range, are identical. Mechanical substitution requires verification of package footprint compatibility. The TO-244AB (Vishay) and PRM4 (SMC Diode Solutions) packages differ in physical dimensions and mounting configuration. PCB layout modifications may be necessary.

Q: What is the significance of the package difference between TO-244AB and PRM4?

A: Both packages support chassis mount applications and deliver equivalent electrical performance. The package designation reflects different mechanical implementations of the same diode array configuration. TO-244AB and PRM4 differ in physical footprint, lead configuration, and mounting interface. Design verification is required to confirm mechanical compatibility with existing PCB layouts and thermal management systems.

Q: Are there compliance or regulatory differences between the two parts?

A: Both the Vishay and SMC Diode Solutions variants maintain ROHS3 compliance and carry MSL 1 (Unlimited) classification. Regulatory and environmental standing is equivalent. The SMC part is REACH Affected, while the Vishay part is REACH Unaffected; however, both satisfy applicable compliance requirements for their respective manufacturing origins.

Q: Why is the Vishay 440CMQ030 listed as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The SMC Diode Solutions 440CMQ030 maintains Active status, confirming ongoing production and availability. For applications requiring this rectifier specification, the SMC variant provides continued supply assurance.

Q: What thermal considerations apply to this substitution?

A: Both parts operate across the identical temperature range (-55°C ~ 150°C junction temperature). Thermal performance is determined by package design, mounting interface, and thermal management implementation. Package differences may affect thermal resistance characteristics. Thermal analysis specific to the PRM4 package geometry is required for applications with stringent thermal constraints.