MBRB4030T4G Schottky Diode Equivalent & Substitute Parts

Part Overview

The MBRB4030T4G is a 30V, 40A Schottky rectifier diode manufactured by onsemi in the SWITCHMODE™ series. This surface mount component is housed in a D2PAK (TO-263-3) package and is designed for fast recovery applications with forward voltage of 550 mV at 40A. The part is currently designated as Last Time Buy, indicating limited future availability. Identification of equivalent and substitute parts is necessary to ensure design continuity and supply chain reliability for applications requiring this specific electrical and mechanical specification.

Substiute Parts

MBRB4030T4G

onsemiIn Stock: 16688MBRB4030T4G Datasheet

Current PartRFQ

NRVBB4030T4G

onsemiIn Stock: 1804NRVBB4030T4G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBRB4030T4G are identified based on strict parametric equivalence across the following criteria:

Electrical Parameters (Critical for Substitution):

• Voltage - DC Reverse (Vr) (Max): 30 V
• Current - Average Rectified (Io): 40 A
• Voltage - Forward (Vf) (Max) @ If: 550 mV @ 40 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 350 µA @ 30 V
• Operating Temperature - Junction: -65°C to 175°C

Mechanical Parameters (Critical for Substitution):

• Package / Case: TO-263-3, D2PAK (2 Leads + Tab)
• Mounting Type: Surface Mount

Compliance Parameters:

• Technology: Schottky
• RoHS Status: ROHS3 Compliant

Parts meeting all these parameters are classified as parametric equivalents and may be substituted in applications where the MBRB4030T4G is specified.

Parameter Comparison

Engineering Selection Recommendations

NRVBB4030T4G is a parametric equivalent to the MBRB4030T4G. All electrical specifications, mechanical dimensions, package configuration, and compliance certifications are identical. Both parts are manufactured by onsemi and meet ROHS3 compliance requirements with REACH Unaffected status.

The primary distinction between these parts is product status. The MBRB4030T4G is designated Last Time Buy, while the NRVBB4030T4G is Obsolete. This status difference reflects manufacturing lifecycle phases rather than functional or electrical differences. Both parts share identical electrical performance characteristics, including 30V reverse voltage rating, 40A average rectified current, 550 mV forward voltage at 40A, and fast recovery speed specifications.

For new designs or long-term production requirements, component availability should be verified with the manufacturer or authorized distributors, as both parts have limited future availability. The selection between these equivalent parts should be based on current inventory status and supply chain accessibility rather than technical performance criteria.

Frequently Asked Questions (FAQ)

Q: Can NRVBB4030T4G be used as a direct replacement for MBRB4030T4G?

A: Yes. The NRVBB4030T4G is a parametric equivalent with identical electrical specifications, forward voltage characteristics, reverse voltage rating, current capacity, and package configuration. Direct substitution is supported from an electrical and mechanical standpoint.

Q: Are there any differences in thermal performance between these parts?

A: Both parts share identical operating temperature ranges (-65°C to 175°C junction temperature) and are housed in the same D2PAK package. No thermal performance differences are specified in the provided parameters.

Q: What does the product status difference mean?

A: MBRB4030T4G is designated Last Time Buy, indicating the manufacturer is limiting future production. NRVBB4030T4G is Obsolete, indicating the manufacturer has discontinued production. Both statuses reflect manufacturing lifecycle decisions. Electrical and mechanical specifications remain unchanged.

Q: Are both parts RoHS compliant?

A: Yes. Both MBRB4030T4G and NRVBB4030T4G are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

Q: Can these parts be used interchangeably in PCB layouts?

A: Yes. Both parts use identical TO-263-3 D2PAK packaging with the same lead configuration (2 Leads + Tab). PCB footprints and thermal pad layouts are compatible.

Q: What is the reverse leakage current specification?

A: Both parts specify 350 µA maximum reverse leakage current at 30V reverse voltage.

Q: What is the forward voltage drop at rated current?

A: Both parts specify 550 mV maximum forward voltage at 40A average rectified current.