Equivalent & Substitute Parts for 241NQ045 Schottky Diode

Part Overview

The 241NQ045 is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 45V DC reverse voltage and 240A average rectified current in a D-67 HALF-PAK chassis mount package. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

241NQ045

Vishay General Semiconductor - Diodes DivisionIn Stock: 916241NQ045 Datasheet

Current PartRFQ

240NQ045-1

SMC Diode SolutionsIn Stock: 1067240NQ045-1 Datasheet

MFR RecommendedRFQ

241NQ045-1

SMC Diode SolutionsIn Stock: 985241NQ045-1 Datasheet

MFR RecommendedRFQ

244NQ045-1

SMC Diode SolutionsIn Stock: 801244NQ045-1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 241NQ045 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 45 V
• Mounting Type: Chassis Mount
• Package / Case: HALF-PAK configuration
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 20 mA @ 45 V
• Capacitance @ Vr, F: 10300pF @ 5V, 1MHz
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Current Rating Consideration: The 241NQ045 specifies 240A average rectified current. Substitute parts are grouped based on whether they maintain this current specification or operate within compatible electrical parameters for the intended application.

Three active substitute parts from SMC Diode Solutions meet the core electrical and mechanical requirements while offering improved product status and compliance attributes.

Parameter Comparison

Engineering Selection Recommendations

241NQ045-1 (Primary Equivalent)

The 241NQ045-1 from SMC Diode Solutions provides direct electrical equivalence to the obsolete 241NQ045. This part maintains identical voltage rating (45V), current rating (240A), forward voltage drop (690 mV @ 240A), and all secondary electrical parameters. The part is active in production, ROHS3 compliant, and offers an extended operating temperature range to 175°C. This substitute is the preferred selection for applications requiring exact electrical performance matching.

240NQ045-1 (Alternative with Improved Forward Voltage)

The 240NQ045-1 operates at the same 45V reverse voltage with improved forward voltage characteristics (610 mV @ 240A versus 690 mV). This part reduces forward voltage drop by 80 mV, resulting in lower power dissipation in high-current applications. The part is active and ROHS3 compliant. Current rating is not specified in available documentation. Selection of this part is appropriate when thermal management and efficiency improvements are prioritized.

244NQ045-1 (Alternative with Lowest Forward Voltage)

The 244NQ045-1 provides the lowest forward voltage drop (550 mV @ 240A) among available substitutes, offering maximum efficiency improvement with 140 mV reduction compared to the original part. This part is active and ROHS3 compliant with an operating temperature range to 125°C. Current rating is not specified in available documentation. Selection of this part is appropriate for applications where power dissipation minimization is critical.

All three substitute parts maintain HALF-PAK chassis mount packaging, Schottky technology, fast recovery speed characteristics, and identical reverse leakage and capacitance specifications. All are ROHS3 compliant with MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can 241NQ045-1 be used as a direct replacement for 241NQ045?

A: Yes. The 241NQ045-1 maintains identical electrical specifications including 45V reverse voltage, 240A average rectified current, 690 mV forward voltage drop at 240A, and all secondary parameters. Both use HALF-PAK chassis mount packaging. The primary difference is product status: 241NQ045-1 is active while 241NQ045 is obsolete.

Q: What is the difference between 241NQ045-1 and 240NQ045-1?

A: Both parts operate at 45V reverse voltage with identical reverse leakage, capacitance, and speed characteristics. The key difference is forward voltage drop: 241NQ045-1 specifies 690 mV @ 240A while 240NQ045-1 specifies 610 mV @ 240A. The 240NQ045-1 exhibits lower power dissipation. Current rating is not specified for 240NQ045-1 in available documentation.

Q: What is the difference between 241NQ045-1 and 244NQ045-1?

A: Both parts operate at 45V reverse voltage with identical reverse leakage, capacitance, and speed characteristics. The key difference is forward voltage drop: 241NQ045-1 specifies 690 mV @ 240A while 244NQ045-1 specifies 550 mV @ 240A. The 244NQ045-1 exhibits the lowest power dissipation among available substitutes. Current rating is not specified for 244NQ045-1 in available documentation. Operating temperature range differs: 241NQ045-1 extends to 175°C while 244NQ045-1 extends to 125°C.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three substitute parts (241NQ045-1, 240NQ045-1, 244NQ045-1) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the compliance profile of the original 241NQ045.

Q: Do the substitute parts use the same package as the original?

A: Yes. All substitute parts use HALF-PAK chassis mount packaging, maintaining mechanical compatibility with the original D-67 HALF-PAK configuration.

Q: What is the impact of forward voltage differences on circuit performance?

A: Forward voltage drop directly affects power dissipation and thermal management. Lower forward voltage (240NQ045-1 at 610 mV and 244NQ045-1 at 550 mV) reduces heat generation compared to the original specification (690 mV). Selection depends on thermal budget and efficiency requirements of the specific application.

Q: Are there temperature rating differences between substitutes?

A: Yes. 241NQ045-1 operates to 175°C junction temperature, while 244NQ045-1 operates to 125°C. The original 241NQ045 does not specify operating temperature range. Application thermal environment must be evaluated against these limits.