NRVS3MB Equivalent & Substitute Parts

Part Overview

The NRVS3MB is a general-purpose rectifier diode manufactured by onsemi, rated for 1000 V DC reverse voltage and 3 A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original part is no longer available or procurement is constrained.

Substiute Parts

NRVS3MB

onsemiIn Stock: 3472NRVS3MB Datasheet

Current PartRFQ

S3MB

MDDIn Stock: 6444S3MB Datasheet

Parametric EquivalentRFQ

CMR3U-10M TR13 PBFREE

Central Semiconductor CorpIn Stock: 17410CMR3U-10M TR13 PBFREE Datasheet

SimilarRFQ

S3MHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 5643S3MHE3_A/I Datasheet

SimilarRFQ

S3MB R5G

Taiwan Semiconductor CorporationIn Stock: 1060S3MB R5G Datasheet

Parametric EquivalentRFQ

S3MBHR5G

Taiwan Semiconductor CorporationIn Stock: 5068S3MBHR5G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NRVS3MB is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 1000 V
• Current - Average Rectified (Io): 3 A
• Package / Case: DO-214AA (SMB) or compatible surface mount package
• Operating Temperature - Junction: -55°C to 150°C minimum
• RoHS3 Compliance and MSL 1 rating

Secondary Compatibility Factors:

• Voltage - Forward (Vf) (Max) @ If: ≤ 1.15 V @ 3 A
• Reverse Recovery Time (trr): ≤ 1.5 µs (standard recovery)
• Current - Reverse Leakage @ Vr: ≤ 10 µA @ 1000 V
• Capacitance @ Vr, F: ≤ 40 pF @ 4V, 1MHz

Substitute parts are grouped into two categories:

Parametric Equivalents: Parts meeting all primary and secondary criteria with identical or superior electrical performance and package compatibility.

Similar Parts: Parts meeting primary electrical criteria but with package variations (DO-214AB/SMC) or performance differences in secondary parameters (forward voltage, recovery time, capacitance).

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitutes (Parametric Equivalents):

S3MB (MDD): This part is the preferred parametric equivalent. It meets all electrical specifications with identical voltage and current ratings, operates within the same temperature range, and maintains ROHS3 compliance and MSL 1 rating. The S3MB demonstrates superior reverse leakage performance (5 µA versus 10 µA) and lower capacitance (35 pF versus 40 pF), resulting in improved circuit performance. Product status is Active, ensuring long-term availability.

S3MB R5G (Taiwan Semiconductor Corporation): This part provides parametric equivalence with identical electrical characteristics to the NRVS3MB, including forward voltage, reverse recovery time, and capacitance. Package compatibility is confirmed as DO-214AA (SMB). However, product status is listed as Discontinued at DiGi Electronics, limiting future procurement reliability.

S3MBHR5G (Taiwan Semiconductor Corporation): This part matches all electrical parameters of the NRVS3MB and maintains DO-214AA (SMB) package compatibility. Like the S3MB R5G, this part is Discontinued at DiGi Electronics, which constrains long-term availability for ongoing production or repair cycles.

Acceptable Alternative (Similar Part with Package Variation):

S3MHE3_A/I (Vishay General Semiconductor - Diodes Division): This part is qualified to AEC-Q101 automotive standard, matching the NRVS3MB grade designation. It meets the 1000 V / 3 A electrical specification and operates within the same temperature range. The package is DO-214AB (SMC), which is physically larger than the DO-214AA (SMB) but maintains surface mount compatibility. Reverse recovery time is 2.5 µs (versus 1.5 µs), and capacitance is 60 pF (versus 40 pF). These differences are within acceptable tolerance for standard recovery diode applications. Product status is Active, supporting long-term availability.

Conditional Alternative (Fast Recovery Technology):

CMR3U-10M TR13 PBFREE (Central Semiconductor Corp): This part meets the 1000 V / 3 A electrical specification and operates within an extended temperature range (-65°C to 175°C). However, it employs fast recovery technology (≤ 500 ns, trr = 100 ns) compared to the standard recovery specification of the NRVS3MB (> 500 ns, trr = 1.5 µs). Forward voltage is elevated at 2 V @ 3 A. The package is DO-214AB (SMC), requiring PCB layout modification. This part is suitable only for applications where fast recovery characteristics are beneficial or neutral to circuit operation. Product status is Active.

Frequently Asked Questions (FAQ)

Q: Can the S3MB (MDD) be used as a direct replacement for the NRVS3MB?

A: Yes. The S3MB meets all electrical specifications of the NRVS3MB with identical voltage and current ratings, matching operating temperature range, and equivalent package designation (SMB). The S3MB demonstrates superior performance in reverse leakage and capacitance. Active product status ensures availability.

Q: What is the difference between DO-214AA (SMB) and DO-214AB (SMC) packages?

A: DO-214AA (SMB) and DO-214AB (SMC) are both surface mount packages but differ in physical dimensions. SMB is smaller than SMC. Parts specified for SMC packages (such as S3MHE3_A/I and CMR3U-10M TR13 PBFREE) require PCB footprints designed for the larger package. Direct physical substitution on existing PCBs designed for SMB packages is not possible without layout modification.

Q: Why does the CMR3U-10M TR13 PBFREE have a higher forward voltage (2 V) compared to the NRVS3MB (1.15 V)?

A: The CMR3U-10M TR13 PBFREE employs fast recovery technology, which inherently results in higher forward voltage drop compared to standard recovery diodes. This characteristic is a trade-off for reduced reverse recovery time (100 ns versus 1.5 µs). Selection of this part should be based on circuit requirements for recovery speed.

Q: Is the S3MHE3_A/I suitable for automotive applications?

A: Yes. The S3MHE3_A/I carries AEC-Q101 qualification and Automotive grade designation, matching the NRVS3MB. It is suitable for automotive applications. The DO-214AB (SMC) package requires PCB layout compatibility verification.

Q: What does "Not For New Designs" status mean for the NRVS3MB?

A: "Not For New Designs" indicates the NRVS3MB has reached end-of-life and is no longer recommended for new product development. Existing inventory may be available, but long-term supply is not guaranteed. Substitution with an Active-status part (such as S3MB or S3MHE3_A/I) is recommended for new designs and ongoing production.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference meet ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity requirements, matching the NRVS3MB environmental specifications.

Q: Can the S3MB R5G or S3MBHR5G be used if the S3MB is unavailable?

A: Both parts provide parametric equivalence to the NRVS3MB. However, both are listed as Discontinued at DiGi Electronics, indicating limited availability. These parts should be considered only if current inventory is accessible and long-term supply constraints are acceptable for the application.

Q: What is the impact of the S3MHE3_A/I's higher capacitance (60 pF versus 40 pF)?

A: Higher capacitance may affect high-frequency circuit performance, particularly in switching applications or circuits with tight timing requirements. For standard rectification applications operating at line frequency or low switching speeds, the difference is typically negligible. Circuit-specific evaluation is necessary for high-frequency applications.