80CNQ040ASL Schottky Diode Array Equivalent & Substitute Parts

Part Overview

The 80CNQ040ASL is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode arrangement rated for 40 V DC reverse voltage and 40 A average rectified current per diode. This component is classified as obsolete, necessitating identification of active equivalent alternatives for continued system support and new design implementations. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating package and compliance variations.

Substiute Parts

80CNQ040ASL

Vishay General Semiconductor - Diodes DivisionIn Stock: 106580CNQ040ASL Datasheet

Current PartRFQ

80CNQ040SL

SMC Diode SolutionsIn Stock: 92780CNQ040SL Datasheet

MFR RecommendedRFQ

81CNQ040SL

SMC Diode SolutionsIn Stock: 120081CNQ040SL Datasheet

MFR RecommendedRFQ

84CNQ040SL

SMC Diode SolutionsIn Stock: 102884CNQ040SL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 80CNQ040ASL is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io) (per Diode): 40 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 5 mA @ 40 V
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variations:

• Forward Voltage (Vf) @ 40 A: Permitted to vary within manufacturer specifications
• Operating Temperature - Junction (Max): Permitted to exceed minimum requirement of 150°C
• Package / Case designation: Permitted to differ (D-61-8-SL vs. PRM2-SL) provided surface mount compatibility is maintained
• Product Status: Active status preferred for long-term availability
• RoHS and REACH Compliance: Variations permitted based on application requirements

All three substitute parts (80CNQ040SL, 81CNQ040SL, 84CNQ040SL) satisfy the mandatory matching parameters and are classified as active products from SMC Diode Solutions.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (80CNQ040SL, 81CNQ040SL, 84CNQ040SL) are electrically equivalent to the 80CNQ040ASL and satisfy the mandatory substitution criteria. Selection among these alternatives is determined by application-specific requirements and compliance mandates:

80CNQ040SL (SMC Diode Solutions): This part maintains identical operating temperature range (-55°C ~ 150°C) to the original 80CNQ040ASL and exhibits the lowest forward voltage specification (660 mV @ 40 A) among the three alternatives. ROHS3 compliance and REACH Affected status apply. This part is suitable for applications requiring thermal performance equivalent to the original specification.

81CNQ040SL (SMC Diode Solutions): This part extends the maximum operating temperature to -55°C ~ 175°C, providing enhanced thermal margin for high-temperature applications. Forward voltage is specified at 740 mV @ 40 A. ROHS3 compliance and REACH Affected status apply. This part is suitable for applications requiring extended temperature operation beyond the original 150°C maximum.

84CNQ040SL (SMC Diode Solutions): This part operates within a reduced temperature range (-55°C ~ 125°C) and exhibits forward voltage specification of 620 mV @ 40 A. ROHS3 compliance and REACH Affected status apply. This part is suitable for applications with maximum operating temperatures not exceeding 125°C.

All substitute parts are manufactured by SMC Diode Solutions with active product status, ensuring long-term availability and supply chain continuity. Package designation changes from D-61-8-SL to PRM2-SL require verification of PCB footprint compatibility prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the 80CNQ040SL, 81CNQ040SL, or 84CNQ040SL be used as direct replacements for the obsolete 80CNQ040ASL?

A: Yes, all three parts are electrically equivalent substitutes. They maintain identical voltage ratings (40 V), current ratings (40 A), diode configuration (1 Pair Common Cathode), technology (Schottky), and reverse leakage specifications (5 mA @ 40 V). Package designation differs (PRM2-SL vs. D-61-8-SL), requiring PCB footprint verification.

Q: What is the primary difference between the three substitute parts?

A: The three substitutes differ in forward voltage specification and maximum operating temperature. The 80CNQ040SL maintains the original temperature range (-55°C ~ 150°C) with 660 mV forward voltage. The 81CNQ040SL extends temperature to 175°C with 740 mV forward voltage. The 84CNQ040SL limits temperature to 125°C with 620 mV forward voltage.

Q: Which substitute part should be selected for a high-temperature application?

A: The 81CNQ040SL is specified for operation to -55°C ~ 175°C, providing the highest maximum junction temperature among the three alternatives. Selection should be confirmed against specific application thermal requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes, all three substitute parts (80CNQ040SL, 81CNQ040SL, 84CNQ040SL) are ROHS3 compliant. The original 80CNQ040ASL is RoHS non-compliant. Applications requiring RoHS compliance must transition to one of the three substitute parts.

Q: What is the impact of the package change from D-61-8-SL to PRM2-SL?

A: The package designation change requires verification that the PRM2-SL surface mount footprint is compatible with existing PCB designs. Physical dimensions, lead spacing, and solder pad configuration must be confirmed against PCB layout prior to component substitution.

Q: Are the substitute parts affected by REACH regulations?

A: Yes, all three substitute parts (80CNQ040SL, 81CNQ040SL, 84CNQ040SL) are classified as REACH Affected. The original 80CNQ040ASL is REACH Unaffected. Applications subject to REACH compliance requirements must confirm compatibility with the substitute parts' REACH status.

Q: What is the forward voltage difference between the substitute parts, and does it affect circuit performance?

A: Forward voltage specifications range from 620 mV (84CNQ040SL) to 740 mV (81CNQ040SL) at 40 A. The 80CNQ040ASL original specification is 520 mV @ 40 A. Forward voltage variations affect power dissipation and thermal performance. Circuit designs must accommodate the specified forward voltage range of the selected substitute part.

Q: Is the reverse leakage current specification identical across all parts?

A: Yes, all parts including the original 80CNQ040ASL and all three substitutes specify 5 mA reverse leakage current @ 40 V. This parameter is identical and does not differentiate the substitute options.

Q: What is the moisture sensitivity level for all parts?

A: All parts, including the original 80CNQ040ASL and the three substitutes, are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.