MBRD320 Equivalent & Substitute Parts

Part Overview

The MBRD320 is a Schottky rectifier diode rated for 20 V DC reverse voltage and 3 A average rectified current in a surface mount DPAK package. The original onsemi MBRD320 carries an Obsolete product status, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain electrical performance across voltage, current, and thermal specifications while accommodating packaging and compliance requirements for new designs.

Substiute Parts

MBRD320

onsemiIn Stock: 3380MBRD320 Datasheet

Current PartRFQ

MBRD320

SMC Diode SolutionsIn Stock: 3374MBRD320 Datasheet

DirectRFQ

RB051L-40TE25

Rohm SemiconductorIn Stock: 80454RB051L-40TE25 Datasheet

SimilarRFQ

VS-MBRD320-M3

Vishay General Semiconductor - Diodes DivisionIn Stock: 30368VS-MBRD320-M3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MBRD320 is determined by strict equivalence across the following parameters:

Primary Electrical Criteria:

• Voltage - DC Reverse (Vr) (Max): 20 V
• Current - Average Rectified (Io): 3 A
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Secondary Electrical Criteria:

• Voltage - Forward (Vf) (Max) @ If: 600 mV @ 3 A (or lower)
• Current - Reverse Leakage @ Vr: 200 µA @ 20 V (or lower)

Mechanical Criteria:

• Mounting Type: Surface Mount
• Package / Case: TO-252-3, DPAK or equivalent footprint compatibility

Thermal Criteria:

• Operating Temperature - Junction: Must support minimum -40°C to 150°C range

Substitute parts are grouped into two categories:

Direct Equivalents (Identical Electrical & Package Specifications): Parts meeting all primary and secondary electrical criteria with identical DPAK packaging and thermal range.

Functional Equivalents (Electrical Equivalence with Package Variation): Parts meeting all primary electrical criteria but with different surface mount packages (e.g., SMA/DO-214AC) that require PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

MBRD320 (SMC Diode Solutions) — Recommended Direct Substitute

The SMC Diode Solutions MBRD320 is the primary substitute for the obsolete onsemi MBRD320. This part maintains identical electrical specifications (20 V, 3 A, 600 mV forward voltage, 200 µA reverse leakage) and identical DPAK packaging. The part carries Active product status and ROHS3 compliance, supporting new design requirements. Operating temperature range (-55°C to 150°C) covers the original specification minimum of -65°C with a 10°C reduction at the lower bound. REACH Affected status requires compliance verification in regulated markets.

VS-MBRD320-M3 (Vishay General Semiconductor) — Direct Substitute with Extended Availability

The Vishay VS-MBRD320-M3 provides direct electrical and package equivalence to the original MBRD320. Electrical parameters are identical (20 V, 3 A, 600 mV forward voltage, 200 µA reverse leakage) with identical TO-252-3 DPAK packaging. The part carries Active product status and ROHS3 compliance. Operating temperature range (-40°C to 150°C) meets the original specification minimum with a 25°C reduction at the lower bound. Capacitance specification (189 pF @ 5V, 1MHz) is provided. REACH Unaffected status eliminates regulatory compliance concerns in all markets. High inventory availability (30,300 pcs) supports production requirements.

RB051L-40TE25 (Rohm Semiconductor) — Functional Equivalent with Package Variation

The Rohm RB051L-40TE25 meets primary electrical criteria (20 V, 3 A, Fast Recovery ≤ 500ns) with superior forward voltage performance (450 mV @ 3 A versus 600 mV). However, this part uses DO-214AC SMA packaging instead of DPAK, requiring PCB layout modification. Current - Reverse Leakage is elevated (1 mA @ 20 V versus 200 µA), representing a 5× increase. Operating temperature maximum is 125°C, reducing thermal headroom compared to the original 150°C specification. Product status is Not For New Designs. This part is suitable only for legacy system maintenance where package change is feasible and elevated leakage current is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the SMC Diode Solutions MBRD320 be used as a direct replacement for the onsemi MBRD320?

A: Yes. The SMC Diode Solutions MBRD320 is electrically and mechanically identical to the onsemi MBRD320, with identical DPAK packaging and electrical specifications (20 V, 3 A, 600 mV forward voltage). No PCB modification is required. The part is Active and ROHS3 compliant.

Q: What is the difference between the Vishay VS-MBRD320-M3 and the original onsemi MBRD320?

A: Electrical specifications are identical (20 V, 3 A, 600 mV forward voltage, 200 µA reverse leakage). Both use identical TO-252-3 DPAK packaging. The operating temperature range differs: Vishay supports -40°C to 150°C versus onsemi's -65°C to 150°C. Vishay provides additional capacitance specification (189 pF @ 5V, 1MHz). No PCB modification is required.

Q: Why does the Rohm RB051L-40TE25 have different electrical specifications?

A: The Rohm RB051L-40TE25 is a functional equivalent meeting the primary voltage and current criteria (20 V, 3 A) but with different secondary characteristics. Forward voltage is lower (450 mV @ 3 A versus 600 mV), reducing power dissipation. Reverse leakage current is higher (1 mA @ 20 V versus 200 µA), increasing standby current. These differences reflect different semiconductor process technology and design optimization.

Q: Can the Rohm RB051L-40TE25 be used without PCB modification?

A: No. The Rohm RB051L-40TE25 uses DO-214AC SMA packaging, while the original MBRD320 uses TO-252-3 DPAK packaging. These packages have different footprints and pin configurations, requiring PCB layout modification. The part is suitable only for applications where package change is feasible.

Q: What is the impact of the Rohm RB051L-40TE25's elevated reverse leakage current?

A: Reverse leakage current of 1 mA @ 20 V is 5× higher than the original 200 µA specification. In applications with high reverse voltage bias or high ambient temperature, this increases standby power consumption and heat generation. Thermal design must account for this additional leakage current.

Q: Are all substitute parts RoHS compliant?

A: The SMC Diode Solutions MBRD320 and Vishay VS-MBRD320-M3 are ROHS3 compliant. The Rohm RB051L-40TE25 is ROHS3 compliant. The original onsemi MBRD320 is RoHS non-compliant. For new designs, ROHS3-compliant substitutes are required.

Q: Which substitute part has the best availability?

A: The Rohm RB051L-40TE25 has the highest inventory (80,400 pcs). The Vishay VS-MBRD320-M3 has 30,300 pcs. The SMC Diode Solutions MBRD320 has 3,270 pcs. Availability should be verified with suppliers for production quantities.

Q: What is the operating temperature difference between substitutes?

A: The original onsemi MBRD320 supports -65°C to 150°C. The SMC Diode Solutions MBRD320 supports -55°C to 150°C (10°C reduction at lower bound). The Vishay VS-MBRD320-M3 supports -40°C to 150°C (25°C reduction at lower bound). The Rohm RB051L-40TE25 supports up to 125°C maximum (25°C reduction at upper bound). Application thermal requirements determine acceptable substitutes.

Q: Can the MBRD320 be used in new product designs?

A: The original onsemi MBRD320 is Obsolete and RoHS non-compliant. New designs must use the SMC Diode Solutions MBRD320 or Vishay VS-MBRD320-M3, both of which are Active and ROHS3 compliant. The Rohm RB051L-40TE25 carries Not For New Designs status and is unsuitable for new product development.