MBRF2045CT-Y Equivalent & Substitute Parts

Part Overview

The MBRF2045CT-Y is a Schottky diode array manufactured by Taiwan Semiconductor Corporation, configured as a 1 Pair Common Cathode arrangement in a TO-220-3 Full Pack with Isolated Tab package. This component is rated for 45 V DC reverse voltage and 20 A average rectified current per diode, with fast recovery characteristics suitable for high-frequency rectification applications. The part is currently Active in product status with 952 units in stock. Substitute parts are necessary when the original manufacturer discontinues production, when alternative sourcing improves lead times or cost efficiency, or when application requirements align with comparable electrical specifications from other manufacturers.

Substiute Parts

MBRF2045CT-Y

Taiwan Semiconductor CorporationIn Stock: 1025MBRF2045CT-Y Datasheet

Current PartRFQ

MBRF2045CT

Diodes IncorporatedIn Stock: 36666MBRF2045CT Datasheet

DirectRFQ

MBRF2045CTP

SMC Diode SolutionsIn Stock: 1615MBRF2045CTP Datasheet

DirectRFQ

MBRF2545CT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1531MBRF2545CT-E3/45 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRF2045CT-Y is determined by strict alignment of electrical and mechanical parameters. The critical parameters that govern substitutability are:

Mandatory Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Mounting Type: Through Hole
• Package / Case: TO-220-3 Full Pack, Isolated Tab
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Electrical Compatibility Parameters:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 45 V
• Current - Average Rectified (Io) (per Diode): Must equal or exceed 20 A
• Operating Temperature - Junction: Must encompass or exceed -55°C to 150°C range

Substitute parts are grouped into two categories:

Direct Substitutes: Parts that match all mandatory parameters and meet or exceed all electrical specifications. These parts are electrically and mechanically interchangeable with the MBRF2045CT-Y.

Similar Substitutes: Parts that match all mandatory parameters but have electrical specifications that differ from the main part. These parts are mechanically compatible but require application-level verification of electrical suitability.

Parameter Comparison

Engineering Selection Recommendations

MBRF2045CTP (SMC Diode Solutions): This part is the primary direct substitute for the MBRF2045CT-Y. It maintains identical voltage rating (45 V), matching diode configuration, package type, and thermal operating range. The forward voltage specification (840 mV @ 20 A) is within 10 mV of the main part. Product status is Active with 1596 units in stock. RoHS3 compliance and unlimited MSL rating ensure compatibility with standard manufacturing processes. This substitute is suitable for direct replacement in applications where the MBRF2045CT-Y is specified.

MBRF2045CT (Diodes Incorporated): This part shares the same base product number and package configuration as the main part. However, it is marked as Obsolete in product status, indicating discontinued manufacturing. The electrical specifications differ significantly: 60 V reverse voltage rating and 10 A current rating represent a downgrade in current capacity relative to the 20 A specification of the MBRF2045CT-Y. This part is not recommended for new designs or as a primary substitute due to its obsolete status and reduced current rating. The part carries AEC-Q101 automotive qualification and REACH Affected status.

MBRF2545CT-E3/45 (Vishay General Semiconductor - Diodes Division): This part is classified as a similar substitute. It maintains the 45 V voltage rating and TO-220-3 package configuration of the main part. The current rating is 12.5 A per diode, which is lower than the 20 A specification of the MBRF2045CT-Y. The forward voltage (820 mV @ 30 A) is slightly lower than the main part. Operating temperature range extends to -65°C, providing enhanced low-temperature performance. Product status is Active with 1427 units in stock. REACH Unaffected status and RoHS3 compliance are confirmed. This substitute is suitable for applications where the 12.5 A current rating is sufficient and the lower forward voltage is beneficial.

Frequently Asked Questions (FAQ)

Q: Can MBRF2045CTP be used as a direct replacement for MBRF2045CT-Y?

A: Yes. MBRF2045CTP meets all mandatory substitution criteria: identical diode configuration (1 Pair Common Cathode), Schottky technology, through-hole mounting, TO-220-3 Full Pack with Isolated Tab package, and fast recovery speed. Electrical specifications align within acceptable tolerances: 45 V reverse voltage rating, forward voltage of 840 mV @ 20 A (versus 850 mV @ 20 A for the main part), and matching operating temperature range of -55°C to 150°C. Product status is Active.

Q: Why is MBRF2045CT listed as a substitute if it has lower current rating?

A: MBRF2045CT is listed in the provided substitute data but is marked as Obsolete. The 10 A current rating represents a significant reduction from the 20 A specification of the MBRF2045CT-Y. This part is not recommended for applications requiring the full 20 A capacity. Its inclusion reflects historical cross-reference data rather than a viable substitution path for new designs.

Q: What is the difference between MBRF2545CT-E3/45 and MBRF2045CT-Y?

A: Both parts share the same 45 V reverse voltage rating and TO-220-3 package configuration. The primary difference is current rating: MBRF2545CT-E3/45 is rated for 12.5 A per diode, while MBRF2045CT-Y is rated for 20 A per diode. MBRF2545CT-E3/45 has a lower forward voltage (820 mV @ 30 A) and an extended low-temperature operating range (-65°C to 150°C versus -55°C to 150°C). This part is suitable for applications where 12.5 A capacity is sufficient.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed—MBRF2045CT-Y, MBRF2045CT, MBRF2045CTP, and MBRF2545CT-E3/45—are confirmed as ROHS3 Compliant. This ensures compatibility with RoHS3 regulated manufacturing environments and end-use applications.

Q: What is the significance of the Isolated Tab in the TO-220-3 Full Pack package?

A: The Isolated Tab designation indicates that the tab (thermal mounting surface) is electrically isolated from the diode circuit. This allows the tab to be mounted directly to a heat sink without requiring electrical isolation hardware. All substitute parts maintain this isolated tab configuration, ensuring mechanical and thermal compatibility with existing PCB layouts and thermal management designs.

Q: Can MBRF2045CTP be used in automotive applications?

A: MBRF2045CTP does not carry automotive qualification markings in the provided specifications. MBRF2045CT carries AEC-Q101 automotive qualification. If automotive-grade qualification is a requirement, MBRF2045CT should be considered despite its obsolete status, or alternative qualified parts should be sourced. MBRF2045CTP is suitable for industrial and commercial applications.

Q: What is the impact of reverse leakage current differences among substitute parts?

A: Reverse leakage current varies among the substitutes: MBRF2045CT-Y specifies 100 µA @ 45 V, MBRF2045CTP specifies 1 mA @ 45 V, and MBRF2545CT-E3/45 specifies 200 µA @ 45 V. Higher reverse leakage increases power dissipation in reverse-biased conditions. For applications sensitive to leakage current, MBRF2045CTP (1 mA) represents a higher leakage condition and should be evaluated against application thermal and efficiency requirements.

Q: Is inventory availability a factor in part selection?

A: Inventory levels are provided for reference: MBRF2045CT-Y has 952 units, MBRF2045CT has 36565 units, MBRF2045CTP has 1596 units, and MBRF2545CT-E3/45 has 1427 units. While MBRF2045CT shows the highest inventory, its Obsolete status makes it unsuitable for new designs. MBRF2045CTP and MBRF2545CT-E3/45 both maintain Active status with adequate stock levels for production requirements.