MBR2045CTH Equivalent & Substitute Parts

Part Overview

The MBR2045CTH is a Schottky diode array manufactured by Taiwan Semiconductor Corporation, configured as a 1 Pair Common Cathode with 45 V reverse voltage rating and 20 A average rectified current per diode. The device is packaged in TO-220-3 through-hole configuration and qualified to AEC-Q101 automotive standards. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

MBR2045CTH

Taiwan Semiconductor CorporationIn Stock: 1003MBR2045CTH Datasheet

Current PartRFQ

MBR2045CT

Fairchild SemiconductorIn Stock: 30232MBR2045CT Datasheet

Parametric EquivalentRFQ

MBR2045PT C0G

Taiwan Semiconductor CorporationIn Stock: 750MBR2045PT C0G Datasheet

Parametric EquivalentRFQ

DSSK28-0045A

IXYSIn Stock: 1656DSSK28-0045A Datasheet

SimilarRFQ

MBR1545CT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 4012MBR1545CT-E3/45 Datasheet

SimilarRFQ

MBR2545CT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 2482MBR2545CT-E3/45 Datasheet

SimilarRFQ

MBR3045CT-BP

Micro Commercial CoIn Stock: 6035MBR3045CT-BP Datasheet

SimilarRFQ

MBR30H45PT-E3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1072MBR30H45PT-E3/45 Datasheet

SimilarRFQ

VT1045CBP-M3/4W

Vishay General Semiconductor - Diodes DivisionIn Stock: 717VT1045CBP-M3/4W Datasheet

SimilarRFQ

VT3045CBP-M3/4W

Vishay General Semiconductor - Diodes DivisionIn Stock: 3835VT3045CBP-M3/4W Datasheet

SimilarRFQ

VT60M45C-M3/4W

Vishay General Semiconductor - Diodes DivisionIn Stock: 2306VT60M45C-M3/4W Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBR2045CTH is determined by the following critical parameters:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 45 V minimum
• Current - Average Rectified (Io) (per Diode): 20 A minimum
• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky

Mechanical Parameters:

• Package / Case: TO-220-3 (primary), TO-247-3 (alternative package with same electrical function)
• Mounting Type: Through Hole

Compliance Parameters:

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

Substitute parts are classified into two categories:

Parametric Equivalent: Parts that match all critical electrical and mechanical parameters with identical or superior ratings in the same package.

Similar Parts: Parts that share the same voltage rating, configuration, and package but differ in current rating or other secondary parameters. These are suitable for applications where the current requirement is lower than the original specification.

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalent - Primary Recommendation:

MBR2045PT C0G (Taiwan Semiconductor Corporation) is the parametric equivalent with identical electrical specifications (45 V, 20 A, 840 mV @ 20 A) and the same manufacturer as the original part. The primary difference is the package format: TO-247-3 instead of TO-220-3. This part is active and maintains ROHS3 compliance and MSL 1 rating. Selection of this part requires PCB layout modification to accommodate the TO-247-3 footprint.

Parametric Equivalent - Secondary Recommendation:

MBR2045CT (Fairchild Semiconductor) is listed as a parametric equivalent with active product status. Detailed electrical specifications are not provided in the available data; verification against the original 45 V, 20 A, 840 mV @ 20 A parameters is required before selection.

Automotive-Grade Substitute:

VT60M45C-M3/4W (Vishay General Semiconductor - Diodes Division) is rated for 30 A average rectified current per diode at 45 V reverse voltage, exceeding the original 20 A specification. This part maintains automotive grade qualification and AEC-Q101 certification, matching the original part's compliance profile. The TO-220-3 package is identical to the original. Forward voltage is 680 mV @ 30 A. Operating temperature range is -40°C ~ 175°C. This part is suitable for direct replacement in automotive applications where the higher current rating provides design margin.

Current-Limited Substitutes:

For applications where the full 20 A specification is not required, the following active parts are available in TO-220-3 package with 45 V rating:

• MBR30H45PT-E3/45 (Vishay): 30 A rating, 730 mV @ 30 A, -65°C ~ 175°C
• MBR3045CT-BP (Micro Commercial Co): 15 A rating, 700 mV @ 15 A, -55°C ~ 150°C
• MBR2545CT-E3/45 (Vishay): 15 A rating, 820 mV @ 30 A, -65°C ~ 150°C
• VT3045CBP-M3/4W (Vishay): 15 A rating, 570 mV @ 15 A, -55°C ~ 200°C
• DSSK28-0045A (IXYS): 15 A rating, 670 mV @ 15 A, -55°C ~ 175°C
• MBR1545CT-E3/45 (Vishay): 7.5 A rating, 570 mV @ 7.5 A, -65°C ~ 175°C
• VT1045CBP-M3/4W (Vishay): 5 A rating, 580 mV @ 5 A, -55°C ~ 200°C

All listed substitutes maintain ROHS3 compliance and MSL 1 rating. Selection among these parts depends on the specific current requirement of the application and thermal management considerations.

Frequently Asked Questions (FAQ)

Q: Can MBR2045PT C0G be used as a direct replacement for MBR2045CTH?

A: MBR2045PT C0G is electrically equivalent with identical 45 V, 20 A, and 840 mV @ 20 A specifications. The primary difference is the package format: TO-247-3 versus TO-220-3. Direct PCB replacement is not possible without footprint modification. Both parts are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between parametric equivalents and similar parts?

A: Parametric equivalents match all critical electrical specifications (voltage, current, forward voltage) of the original part. Similar parts share the same voltage rating and configuration but have different current ratings. Similar parts are suitable only for applications where the lower current rating meets the design requirement.

Q: Is VT60M45C-M3/4W suitable for automotive applications?

A: Yes. VT60M45C-M3/4W carries automotive grade qualification and AEC-Q101 certification, matching the original MBR2045CTH. The 30 A rating exceeds the original 20 A specification, providing design margin. The TO-220-3 package is identical to the original.

Q: Why are some substitute parts rated for higher current than the original?

A: Higher current ratings indicate improved thermal performance or die design. Parts such as MBR30H45PT-E3/45 (30 A) and VT60M45C-M3/4W (30 A) can be used in applications requiring 20 A or less. The higher rating provides thermal margin and may reduce junction temperature during operation.

Q: What compliance certifications are maintained across substitute parts?

A: All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. VT60M45C-M3/4W additionally maintains automotive grade and AEC-Q101 qualification, identical to the original part.

Q: Can parts with lower current ratings be used if the application requires less than 20 A?

A: Yes. Parts such as MBR2545CT-E3/45 (15 A), DSSK28-0045A (15 A), and MBR1545CT-E3/45 (7.5 A) are suitable for applications where the current requirement is lower than the original specification. All maintain the 45 V reverse voltage rating and TO-220-3 package format.

Q: What is the significance of forward voltage differences among substitute parts?

A: Forward voltage (Vf) varies with current rating and die design. Lower Vf values (such as 570 mV in VT3045CBP-M3/4W and MBR1545CT-E3/45) indicate lower power dissipation at rated current. Higher Vf values (such as 840 mV in MBR2045PT C0G) are typical for higher current-rated devices. Selection depends on thermal budget and efficiency requirements of the application.

Q: Are all substitute parts available in the same TO-220-3 package?

A: All listed substitute parts except MBR2045PT C0G are available in TO-220-3 package. MBR2045PT C0G uses TO-247-3 package, which requires PCB layout modification. TO-247-3 provides improved thermal performance due to larger lead frame area.

Q: What is the operating temperature range consideration for substitute selection?

A: The original MBR2045CTH operates from -55°C to 150°C. Several substitutes offer extended ranges: MBR30H45PT-E3/45, DSSK28-0045A, and MBR1545CT-E3/45 extend to -65°C and 175°C. VT1045CBP-M3/4W and VT3045CBP-M3/4W extend to 200°C maximum junction temperature. Selection depends on the application's thermal environment and reliability requirements.