243NQ080 Schottky Diode Equivalent & Substitute Parts

Part Overview

The 243NQ080 is a Schottky rectifier diode rated for 80 V DC reverse voltage and 240 A average rectified current, housed in a D-67 HALF-PAK chassis mount package. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability. The part exhibits fast recovery characteristics suitable for high-frequency rectification applications requiring low forward voltage drop and rapid switching performance.

Substiute Parts

243NQ080

Vishay General Semiconductor - Diodes DivisionIn Stock: 1218243NQ080 Datasheet

Current PartRFQ

243NQ080-1

SMC Diode SolutionsIn Stock: 1213243NQ080-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 243NQ080 is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical for Functional Equivalence):

• Voltage - DC Reverse (Vr) Maximum: 80 V
• Current - Average Rectified (Io): 240 A
• Voltage - Forward (Vf) Maximum @ If: 860 mV @ 240 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA
• Current - Reverse Leakage @ Vr: 6 mA @ 80 V
• Capacitance @ Vr, F: 5500 pF @ 5V, 1MHz

Mechanical Parameters (Required for Physical Compatibility):

• Mounting Type: Chassis Mount
• Package Classification: HALF-PAK

Compliance Parameters (Mandatory for Regulatory Continuity):

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

The substitute part 243NQ080-1 satisfies all electrical and mechanical equivalence criteria while maintaining regulatory compliance. The transition from obsolete to active product status ensures long-term availability without performance degradation.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 243NQ080-1

The 243NQ080-1 manufactured by SMC Diode Solutions is the direct functional equivalent for the obsolete 243NQ080. Selection of this substitute is based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters—reverse voltage rating, average rectified current, forward voltage drop, switching speed, reverse leakage current, and junction capacitance—are identical to the original part. This ensures drop-in compatibility in existing circuit designs without performance degradation.

Mechanical Compatibility: Both parts utilize HALF-PAK chassis mount packaging. The supplier device package designation (PRM1-1 Half Pak Module for the substitute versus D-67 HALF-PAK for the original) represents equivalent mechanical form factors suitable for the same mounting interfaces.

Regulatory Compliance: The substitute maintains ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring continuity with environmental and regulatory requirements. The substitute provides specified operating temperature range (-55°C to 175°C), offering additional design documentation compared to the original part.

Product Status Transition: The transition from obsolete (243NQ080) to active (243NQ080-1) status ensures sustained supply chain availability and eliminates long-term procurement risk.

REACH Status Consideration: The substitute is classified as REACH Affected, whereas the original is REACH Unaffected. This distinction requires verification against specific application regulatory requirements in regions subject to REACH legislation.

Frequently Asked Questions (FAQ)

Q: Can the 243NQ080-1 be used as a direct replacement for the 243NQ080 in existing designs?

A: Yes. The 243NQ080-1 is electrically and mechanically equivalent to the 243NQ080 across all specified parameters. Both parts share identical voltage ratings (80 V), current ratings (240 A), forward voltage characteristics (860 mV @ 240 A), switching speed (Fast Recovery ≤ 500ns), and HALF-PAK chassis mount packaging. No circuit modifications are required.

Q: What is the difference between the D-67 HALF-PAK and PRM1-1 Half Pak Module package designations?

A: These designations represent supplier-specific nomenclature for equivalent HALF-PAK mechanical form factors. Both packages are functionally identical for chassis mount applications and provide the same physical and electrical interface characteristics. The different naming reflects manufacturer-specific packaging conventions rather than functional differences.

Q: Are there any compliance differences between the 243NQ080 and 243NQ080-1?

A: Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. The primary compliance difference is REACH status: the original part is REACH Unaffected, while the substitute is REACH Affected. Applications subject to REACH regulations must verify this classification against specific regional requirements.

Q: Does the 243NQ080-1 provide operating temperature specifications?

A: Yes. The 243NQ080-1 specifies an operating junction temperature range of -55°C to 175°C. The original 243NQ080 does not include this specification in the provided data. This additional specification in the substitute provides enhanced design documentation for thermal analysis.

Q: What inventory status should be considered when selecting between these parts?

A: The 243NQ080 (obsolete) has 1133 pieces in stock, while the 243NQ080-1 (active) has 1140 pieces in stock. Long-term design continuity favors the active 243NQ080-1 due to its non-obsolete status, ensuring sustained availability beyond current inventory levels.

Q: Are the reverse leakage current and capacitance characteristics identical?

A: Yes. Both parts exhibit 6 mA reverse leakage current at 80 V and 5500 pF capacitance at 5 V, 1 MHz. These parameters are critical for high-frequency rectification performance and are fully equivalent between the two parts.