MR758-BP Equivalent & Substitute Parts

Part Overview

The MR758-BP is a general-purpose rectifier diode rated for 800 V DC reverse voltage and 6 A average rectified current, manufactured by Micro Commercial Co. This component features a leaded button package for through-hole mounting applications and operates across a junction temperature range of -65°C to 175°C.

The MR758-BP is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and legacy system requirements where this diode is specified in existing designs or field-deployed equipment.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	6	A
Voltage - Forward (Vf) (Max) @ If	900 mV @ 6 A	mV
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	25	µA @ 800 V
Mounting Type	Through Hole	—
Package / Case	Button, Axial	—
Operating Temperature - Junction	-65°C ~ 175°C	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MR758-BP are qualified based on the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 800 V minimum
Current - Average Rectified (Io): 6 A minimum
Speed: Standard Recovery >500ns, > 200mA (Io)
Technology: Standard

Mechanical Compatibility Criteria:

Mounting Type: Through Hole
Package / Case: Axial configuration

Compliance Criteria:

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

The substitute parts listed below meet all electrical and mechanical requirements for direct substitution in applications where the MR758-BP is specified. Variations in forward voltage, reverse leakage current, operating temperature range, and package form factor are documented to support engineering selection based on specific application constraints.

Parameter Comparison

Parameter	MR758-BP	60S8-TP	6A8-TP
Manufacturer	Micro Commercial Co	Micro Commercial Co	Micro Commercial Co
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V
Current - Average Rectified (Io)	6 A	6 A	6 A
Voltage - Forward (Vf) (Max) @ If	900 mV @ 6 A	1 V @ 6 A	950 mV @ 6 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	25 µA @ 800 V	5 µA @ 800 V	10 µA @ 800 V
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Button, Axial	DO-201AD, Axial	R-6, Axial
Operating Temperature - Junction	-65°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 125°C
Product Status	Obsolete	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

60S8-TP (Active Status)

The 60S8-TP is the primary substitute for the MR758-BP. This part maintains electrical equivalence across all critical parameters: 800 V reverse voltage rating, 6 A average rectified current, and standard recovery speed. The 60S8-TP is classified as Active, ensuring ongoing availability and manufacturing support. It is supplied in DO-201AD package format with Tape & Reel (TR) packaging. The operating temperature range (-55°C to 150°C) is narrower than the MR758-BP but remains suitable for most industrial and commercial applications. Forward voltage is slightly elevated at 1 V compared to 900 mV, and reverse leakage is lower at 5 µA. ROHS3 compliance and MSL 1 rating are maintained.

6A8-TP (Not For New Designs Status)

The 6A8-TP provides electrical equivalence and is available in higher inventory quantities. This part is classified as Not For New Designs, indicating it remains in production but is not recommended for new circuit development. The 6A8-TP is supplied in R-6 package format with Cut Tape (CT) packaging. The operating temperature range (-55°C to 125°C) is the most restrictive of the three options. Forward voltage is 950 mV, and reverse leakage is 10 µA. ROHS3 compliance and MSL 1 rating are maintained. This part is suitable for legacy system support and repair applications where existing designs already specify R-6 package compatibility.

Compliance and Certification

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing and storage requirements. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Frequently Asked Questions (FAQ)

Q: Can the 60S8-TP directly replace the MR758-BP in existing designs?

A: The 60S8-TP meets all electrical requirements for substitution: 800 V reverse voltage, 6 A current rating, and standard recovery speed. However, the package form factor differs (DO-201AD versus Button). Physical board layout and lead spacing must be verified before substitution. The 60S8-TP is the recommended substitute due to its Active product status.

Q: What is the difference between the Button package (MR758-BP) and the DO-201AD package (60S8-TP)?

A: Both are through-hole axial packages designed for PCB mounting. The Button package and DO-201AD package have different physical dimensions and lead configurations. Mechanical compatibility must be confirmed by comparing package drawings and PCB footprint specifications before substitution.

Q: Why is the 6A8-TP classified as "Not For New Designs"?

A: This classification indicates the part remains in production and available for support of existing systems but is not recommended for incorporation into new circuit designs. The 6A8-TP is suitable for repair and maintenance of legacy equipment where the R-6 package is already specified.

Q: Are there differences in forward voltage between these parts?

A: Yes. The MR758-BP specifies 900 mV maximum forward voltage at 6 A. The 60S8-TP specifies 1 V, and the 6A8-TP specifies 950 mV. These variations are within standard rectifier diode tolerances and do not affect functional equivalence in most applications. Circuit designs with tight forward voltage specifications should account for these differences.

Q: What is the significance of reverse leakage current differences?

A: The MR758-BP specifies 25 µA reverse leakage at 800 V. The 60S8-TP specifies 5 µA, and the 6A8-TP specifies 10 µA. Lower reverse leakage indicates better diode quality and lower standby current consumption. Applications sensitive to leakage current may benefit from the 60S8-TP or 6A8-TP.

Q: Does the narrower operating temperature range of the 60S8-TP (-55°C to 150°C) affect substitution?

A: The MR758-BP operates from -65°C to 175°C, while the 60S8-TP operates from -55°C to 150°C. If the application requires operation below -55°C or above 150°C, the 60S8-TP is not suitable. For standard industrial and commercial temperature ranges, the 60S8-TP is acceptable.

Q: What packaging formats are available for each substitute?

A: The 60S8-TP is supplied in Tape & Reel (TR) format. The 6A8-TP is supplied in Cut Tape (CT) format. The original MR758-BP packaging format is not specified in the available data. Packaging selection depends on manufacturing and assembly requirements.

Q: Are all parts RoHS3 compliant?

A: Yes. The MR758-BP, 60S8-TP, and 6A8-TP are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with modern manufacturing standards and environmental regulations.

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