MR754G Equivalent & Substitute Parts

Part Overview

The MR754G is a general-purpose rectifier diode manufactured by onsemi, rated for 400 V DC reverse voltage and 6 A average rectified current. The device features a through-hole Microde Button package with standard recovery characteristics. The MR754G is classified as obsolete, necessitating identification of equivalent substitute components for ongoing applications and new designs. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating package and mounting variations.

Substiute Parts

MR754G

onsemiIn Stock: 938MR754G Datasheet

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6A4-TP

Micro Commercial CoIn Stock: 128516A4-TP Datasheet

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GI754-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 27167GI754-E3/54 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MR754G are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 400 V minimum
• Current - Average Rectified (Io): 6 A minimum
• Mounting Type: Through Hole
• Speed Classification: Standard Recovery >500ns, > 200mA (Io)
• Package / Case: Axial configuration

Secondary Compatibility Factors:

• Voltage - Forward (Vf) (Max) @ If: ≤950 mV @ 6 A
• Current - Reverse Leakage @ Vr: ≤25 µA @ 400 V
• Operating Temperature - Junction: Minimum -50°C to maximum 125°C or greater
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute parts GI754-E3/54 and 6A4-TP satisfy all primary criteria and maintain electrical performance within acceptable tolerances. Both devices are through-hole axial rectifier diodes with identical voltage and current ratings. Package variations (P600 and R-6 respectively) accommodate different circuit board layouts while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

GI754-E3/54 (Vishay General Semiconductor - Diodes Division) is the primary substitute for the obsolete MR754G. This device is classified as Active product status, ensuring long-term availability and supply chain continuity. The GI754-E3/54 is ROHS3 compliant and provides identical electrical performance with lower reverse leakage current (5 µA versus 25 µA). The P600 package accommodates standard through-hole circuit board layouts. Operating temperature range of -50°C to 150°C covers the majority of industrial applications.

6A4-TP (Micro Commercial Co) serves as a secondary substitute option. This device is classified as Not For New Designs but remains available with substantial inventory. The 6A4-TP exhibits slightly elevated forward voltage (950 mV versus 900 mV at 6 A) and reduced reverse leakage (10 µA). The R-6 package provides alternative mechanical compatibility for specific board configurations. Operating temperature range of -55°C to 125°C is suitable for standard commercial and industrial environments.

Selection between GI754-E3/54 and 6A4-TP depends on product lifecycle requirements, package space constraints, and thermal operating conditions. For new designs and long-term production, GI754-E3/54 is the recommended choice due to active product status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the GI754-E3/54 directly replace the MR754G without circuit modifications?

A: The GI754-E3/54 maintains identical voltage and current ratings (400 V, 6 A) and standard recovery characteristics. The primary difference is package form factor (P600 versus Microde Button). Direct electrical substitution is valid; mechanical mounting accommodation may be required depending on circuit board layout.

Q: What is the significance of the forward voltage difference between MR754G (900 mV) and 6A4-TP (950 mV)?

A: The 50 mV difference at 6 A rated current represents a 5.6% increase in forward voltage drop. This results in proportionally higher power dissipation in the 6A4-TP. For applications with tight thermal budgets or high-frequency switching, this difference may be significant. The GI754-E3/54 maintains the original 900 mV specification.

Q: Why is the 6A4-TP marked "Not For New Designs"?

A: This classification indicates the manufacturer does not recommend this part for new product development. While the device remains electrically functional and available, long-term supply and support are not guaranteed. The GI754-E3/54 (Active status) is the preferred choice for new designs.

Q: Are package differences between Microde Button, P600, and R-6 electrically significant?

A: Package differences are mechanical and thermal in nature, not electrical. All three packages are through-hole axial configurations with identical electrical performance. Package selection depends on circuit board hole spacing, lead diameter requirements, and thermal dissipation needs.

Q: What is the impact of reverse leakage current differences across the three devices?

A: The MR754G specifies 25 µA reverse leakage at 400 V, while GI754-E3/54 specifies 5 µA and 6A4-TP specifies 10 µA. Lower reverse leakage reduces standby power consumption and heat generation. For DC power supply and rectification applications, this difference is typically negligible. For precision analog circuits, lower leakage may provide performance benefits.

Q: Can the MR754G be used in applications requiring ROHS3 compliance?

A: The MR754G RoHS status is not specified in available documentation. The GI754-E3/54 is explicitly ROHS3 compliant and is the appropriate choice for applications with regulatory compliance requirements.

Q: What are the thermal operating range implications of the three devices?

A: The MR754G operates from -65°C to 175°C, the GI754-E3/54 from -50°C to 150°C, and the 6A4-TP from -55°C to 125°C. For applications requiring operation below -50°C or above 150°C, the MR754G specifications are superior. For standard industrial temperature ranges (-40°C to 85°C), all three devices are suitable.