MBR1045 C0G Equivalent & Substitute Parts

Part Overview

The MBR1045 C0G is a general-purpose rectifier diode rated for 45 V DC reverse voltage and 10 A average rectified current in a Through Hole TO-220AC package. Manufactured by Taiwan Semiconductor Corporation, this component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent alternatives for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating the Through Hole TO-220AC form factor.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io)	10	A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 10 A	mV
Current - Reverse Leakage @ Vr	100	µA @ 45 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	-
Package / Case	TO-220-2	-
Technology	Standard	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the MBR1045 C0G is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 45 V
Current - Average Rectified (Io): Must equal or exceed 10 A
Mounting Type: Must be Through Hole
Package / Case: Must be TO-220-2
Supplier Device Package: Must be TO-220AC
RoHS Status: Must maintain ROHS3 Compliance

Secondary Evaluation Parameters:

Voltage - Forward (Vf) (Max) @ If: Lower values indicate improved efficiency
Current - Reverse Leakage @ Vr: Lower values indicate superior blocking characteristics
Operating Temperature - Junction: Extended range provides design margin
Technology: Schottky technology offers faster recovery characteristics than Standard technology

The substitute parts identified below satisfy all mandatory compatibility criteria and are presented with their respective parameter variations for engineering evaluation.

Parameter Comparison

Parameter	MBR1045 C0G (Main)	MBR1045 (Direct)	DSS10-0045A (IXYS)	VT2045BP-M3/4W (Vishay)
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	IXYS	Vishay General Semiconductor - Diodes Division
Technology	Standard	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	45 V	45 V
Current - Average Rectified (Io)	10 A	10 A	10 A	20 A
Voltage - Forward (Vf) (Max) @ If	700 mV @ 10 A	700 mV @ 10 A	680 mV @ 10 A	660 mV @ 20 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)	Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 45 V	100 µA @ 45 V	300 µA @ 45 V	2 mA @ 45 V
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 175°C	-55°C to 200°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-2	TO-220-2	TO-220-2	TO-220-2
Supplier Device Package	TO-220AC	TO-220AC	TO-220AC	TO-220AC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent - MBR1045 (Taiwan Semiconductor Corporation)

The MBR1045 represents the direct equivalent to the MBR1045 C0G. Both parts share identical voltage and current ratings, forward voltage characteristics, and operating temperature range. The primary distinction is technology classification: the MBR1045 employs Schottky technology with fast recovery characteristics (≤500ns) compared to the standard recovery (>500ns) of the original part. The MBR1045 maintains active product status and ROHS3 compliance, providing immediate procurement availability.

Alternative Equivalent - DSS10-0045A (IXYS)

The DSS10-0045A satisfies all mandatory compatibility criteria with matching 45 V reverse voltage and 10 A current ratings. This Schottky diode offers a marginally lower forward voltage (680 mV versus 700 mV) and extended operating temperature range to 175°C. Reverse leakage current is elevated at 300 µA compared to 100 µA in the original specification. The DSS10-0045A maintains active status and ROHS3 compliance.

Higher Current Capacity Alternative - VT2045BP-M3/4W (Vishay General Semiconductor - Diodes Division)

The VT2045BP-M3/4W provides 45 V reverse voltage compatibility with doubled current capacity at 20 A average rectified current. This Schottky diode exhibits superior forward voltage performance (660 mV at 20 A) and the highest operating temperature rating at 200°C maximum junction temperature. Reverse leakage current is significantly elevated at 2 mA. The VT2045BP-M3/4W is supplied in Tube packaging, maintains active product status, and meets ROHS3 compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the MBR1045 (Schottky) directly replace the MBR1045 C0G (Standard) without circuit modification?

A: Yes. Both parts maintain identical voltage ratings (45 V), current ratings (10 A), forward voltage characteristics (700 mV @ 10 A), and operating temperature range (-55°C to 150°C). The Schottky technology in the MBR1045 provides faster recovery characteristics, which is compatible with standard rectifier applications.

Q: What is the primary difference between the DSS10-0045A and the direct MBR1045 equivalent?

A: The DSS10-0045A is manufactured by IXYS rather than Taiwan Semiconductor Corporation. It offers marginally improved forward voltage (680 mV versus 700 mV) and extended temperature range to 175°C. Reverse leakage current is higher at 300 µA compared to 100 µA. All other electrical and mechanical parameters remain compatible.

Q: Why does the VT2045BP-M3/4W have a higher reverse leakage current (2 mA) compared to other alternatives?

A: The VT2045BP-M3/4W is rated for 20 A average rectified current, double the original 10 A specification. Higher current capacity Schottky diodes typically exhibit increased reverse leakage as a characteristic of the technology. This part remains suitable for applications requiring the original 10 A specification with additional design margin.

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

A: Yes. All identified substitute parts utilize the Through Hole TO-220-2 package with TO-220AC supplier device package designation, ensuring mechanical and thermal interface compatibility with the original MBR1045 C0G.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. The MBR1045, DSS10-0045A, and VT2045BP-M3/4W all maintain ROHS3 Compliant status, meeting environmental and regulatory requirements equivalent to the original part.

Q: What is the significance of the Schottky technology in the substitute parts?

A: Schottky diodes provide fast recovery characteristics (≤500ns) compared to standard recovery (>500ns) in the original MBR1045 C0G. This results in reduced switching losses and improved efficiency in rectifier applications. Fast recovery is compatible with standard rectifier circuit designs.

Q: Can the VT2045BP-M3/4W be used in applications designed for 10 A operation?

A: Yes. The VT2045BP-M3/4W is rated for 20 A average rectified current, providing 100% design margin for 10 A applications. The 45 V reverse voltage rating and TO-220AC package ensure full mechanical and electrical compatibility. The higher current capacity does not create operational constraints in lower-current designs.

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