Equivalent & Substitute Parts for 180NQ045

Part Overview

The 180NQ045 is a Schottky rectifier diode rated for 45 V DC reverse voltage and 180 A average rectified current, housed in a D-67 HALF-PAK chassis mount package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for new production and field replacements.

Substiute Parts

180NQ045

Vishay General Semiconductor - Diodes DivisionIn Stock: 1528180NQ045 Datasheet

Current PartRFQ

180NQ045-1

SMC Diode SolutionsIn Stock: 682180NQ045-1 Datasheet

MFR RecommendedRFQ

181NQ045-1

SMC Diode SolutionsIn Stock: 969181NQ045-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 180NQ045 is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 45 V
• Current - Average Rectified (Io): 180 A
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 15 mA @ 45 V

Mechanical Equivalence Criteria:

• Mounting Type: Chassis Mount
• Package / Case: HALF-PAK configuration
• RoHS Compliance: ROHS3 Compliant

The substitute parts 180NQ045-1 and 181NQ045-1 meet these core substitution parameters. Both are manufactured by SMC Diode Solutions and carry active product status, ensuring long-term availability. Minor variations in forward voltage and capacitance do not disqualify these parts from substitution when the primary electrical ratings and mechanical form factor remain within specification.

Parameter Comparison

Engineering Selection Recommendations

180NQ045-1 (SMC Diode Solutions): This substitute maintains identical electrical specifications to the original 180NQ045, including forward voltage of 600 mV @ 180 A and capacitance of 7700 pF @ 5V, 1MHz. The part carries active product status and ROHS3 compliance. Current inventory of 625 units is available. This part is the preferred direct replacement when electrical parameter matching is critical.

181NQ045-1 (SMC Diode Solutions): This substitute meets all core substitution criteria with identical reverse voltage, current rating, and leakage specifications. Forward voltage is specified at 660 mV @ 180 A (60 mV higher than the original) and capacitance is 7800 pF @ 5V, 1MHz (100 pF higher). The part carries active product status and ROHS3 compliance. Current inventory of 929 units is available. This part is suitable for applications where the forward voltage and capacitance variations fall within circuit design tolerances.

Both substitute parts are manufactured by SMC Diode Solutions, ensuring consistent quality and long-term availability. Selection between 180NQ045-1 and 181NQ045-1 depends on circuit-specific requirements regarding forward voltage drop and capacitive behavior.

Frequently Asked Questions (FAQ)

Q: Why is the 180NQ045 no longer available? A: The 180NQ045 is classified as obsolete by Vishay General Semiconductor - Diodes Division. Substitute parts from active manufacturers ensure continued component availability and design support.

Q: Are the substitute parts electrically equivalent to the original 180NQ045? A: The 180NQ045-1 is electrically identical to the original part across all specified parameters. The 181NQ045-1 maintains equivalence in reverse voltage, current rating, and leakage specifications, with minor variations in forward voltage (60 mV higher) and capacitance (100 pF higher) that fall within typical circuit design margins.

Q: Can I use 181NQ045-1 as a direct replacement for 180NQ045? A: The 181NQ045-1 is a functional substitute when the forward voltage increase of 60 mV and capacitance increase of 100 pF do not adversely affect circuit performance. Circuit analysis is required to confirm compatibility with specific application requirements.

Q: What is the difference between the D-67 HALF-PAK and PRM1-1 (Half Pak Module) packages? A: Both designations refer to the same HALF-PAK chassis mount form factor. The PRM1-1 designation is the supplier device package nomenclature used by SMC Diode Solutions. Mechanical and electrical interfaces are equivalent.

Q: Are the substitute parts RoHS compliant? A: Both 180NQ045-1 and 181NQ045-1 are ROHS3 compliant, matching the compliance status of the original 180NQ045.

Q: What is the operating temperature range for the substitute parts? A: The 180NQ045-1 operates from -55°C to 150°C junction temperature. The 181NQ045-1 operates from -55°C to 175°C junction temperature, providing an extended high-temperature capability.

Q: How do I determine which substitute part to use? A: Use 180NQ045-1 for direct electrical equivalence. Use 181NQ045-1 when the extended operating temperature range (-55°C to 175°C) is required and the forward voltage and capacitance variations are acceptable for the application.