Equivalent & Substitute Parts for 161CMQ040

Part Overview

The 161CMQ040 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode module rated for 40 V DC reverse voltage and 160 A average rectified current per diode. The device is housed in a TO-249AA chassis mount package and is classified as obsolete. Due to its obsolete product status, identifying equivalent and substitute components is necessary to maintain design continuity and ensure supply chain availability for applications requiring this specific electrical and mechanical configuration.

Substiute Parts

161CMQ040

Vishay General Semiconductor - Diodes DivisionIn Stock: 1024161CMQ040 Datasheet

Current PartRFQ

160CMQ040

Vishay General Semiconductor - Diodes DivisionIn Stock: 655160CMQ040 Datasheet

MFR RecommendedRFQ

161CMQ040

Vishay General Semiconductor - Diodes DivisionIn Stock: 1024161CMQ040 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 161CMQ040 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io): 160 A per diode
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 5 mA @ 40 V

Mechanical Parameters:

• Mounting Type: Chassis Mount
• Package / Case: TO-249AA

Configuration Parameters:

• Diode Configuration: 1 Pair Common Cathode

Compliance Parameters:

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

The 160CMQ040 qualifies as a substitute based on matching voltage, current, technology, speed, leakage, mounting type, and package specifications. Minor variations in forward voltage (860 mV vs. 880 mV @ 160 A) and the absence of common cathode configuration in the 160CMQ040 represent functional differences that must be evaluated within the context of the specific application circuit topology.

Parameter Comparison

Engineering Selection Recommendations

Both the 161CMQ040 and 160CMQ040 are classified as obsolete products. Selection between these components must be based on the following criteria:

Configuration Compatibility: The 161CMQ040 is specified as a 1 Pair Common Cathode diode array, while the 160CMQ040 is specified as a single diode. This configuration difference is fundamental and affects circuit topology. The common cathode configuration of the 161CMQ040 provides a shared cathode terminal for both diodes within the array, which may be required for specific application circuits.

Electrical Performance: Both components meet the 40 V reverse voltage and 160 A current specifications. The 160CMQ040 exhibits a lower forward voltage drop (860 mV vs. 880 mV @ 160 A), which results in reduced power dissipation and improved thermal performance in high-current applications.

Compliance and Availability: Both components are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage practices. Current inventory availability shows 934 units of 161CMQ040 and 633 units of 160CMQ040 in stock.

Substitution Feasibility: The 160CMQ040 can serve as a substitute for the 161CMQ040 only in applications where the common cathode configuration is not a circuit requirement. Circuit topology analysis is necessary to confirm compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 160CMQ040 directly replace the 161CMQ040 in all applications?

A: No. The 161CMQ040 is configured as a 1 Pair Common Cathode diode array, while the 160CMQ040 is a single diode. Direct substitution is only possible in applications where the common cathode configuration is not required for circuit operation. Circuit topology review is necessary.

Q: What are the key electrical parameters that must match for substitution?

A: The critical matching parameters are: Voltage - DC Reverse (Vr) of 40 V, Current - Average Rectified (Io) of 160 A, Schottky technology, Fast Recovery speed (≤ 500ns, > 200mA), and Current - Reverse Leakage of 5 mA @ 40 V.

Q: Are both parts housed in the same package?

A: Yes. Both the 161CMQ040 and 160CMQ040 use the TO-249AA chassis mount package, ensuring mechanical compatibility in terms of mounting and thermal interface requirements.

Q: What is the significance of the forward voltage difference between these parts?

A: The 160CMQ040 has a forward voltage of 860 mV @ 160 A compared to 880 mV @ 160 A for the 161CMQ040. This 20 mV difference results in lower power dissipation and reduced heat generation in the 160CMQ040, which may be beneficial in thermally constrained applications.

Q: Are both components RoHS compliant?

A: Yes. Both the 161CMQ040 and 160CMQ040 are ROHS3 compliant and carry MSL 1 (Unlimited) ratings, meeting current environmental and manufacturing standards.

Q: Why are both parts classified as obsolete?

A: Both components are listed with obsolete product status. This classification indicates that these parts are no longer in active production. Existing inventory remains available, but long-term supply cannot be guaranteed.