NRVS3KB Equivalent & Substitute Parts

Part Overview

The NRVS3KB is a general-purpose rectifier diode manufactured by onsemi, rated for 800 V DC reverse voltage and 3 A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as Last Time Buy, indicating discontinued production with limited remaining inventory of 1,103 pieces. The part carries automotive-grade qualification (AEC-Q101) and is ROHS3 compliant. Identifying equivalent and substitute parts is necessary to ensure design continuity and supply chain reliability for applications requiring this rectifier specification.

Substiute Parts

NRVS3KB

onsemiIn Stock: 1206NRVS3KB Datasheet

Current PartRFQ

S3KB

Taiwan Semiconductor CorporationIn Stock: 75312S3KB Datasheet

Parametric EquivalentRFQ

S3KHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 4413S3KHE3_A/I Datasheet

SimilarRFQ

S3KB

Taiwan Semiconductor CorporationIn Stock: 75312S3KB Datasheet

Parametric EquivalentRFQ

S3KBH

Taiwan Semiconductor CorporationIn Stock: 7221S3KBH Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NRVS3KB is determined by matching the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 800 V
• Current - Average Rectified (Io): 3 A
• Voltage - Forward (Vf) (Max): 1.15 V or lower
• Reverse Recovery Time (trr): 1.5 µs or lower
• Current - Reverse Leakage @ Vr: 10 µA @ 800 V

Mechanical Matching Criteria:

• Package / Case: DO-214AA (SMB) or DO-214AB (SMC)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C to 150°C or wider

Compliance Criteria:

• RoHS3 Compliant
• REACH Unaffected
• Automotive Grade (AEC-Q101 preferred for automotive applications)

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical and mechanical specifications with same package) and Similar Parts (equivalent electrical performance with alternative package form factor).

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitutes):

The S3KB (Taiwan Semiconductor Corporation) and S3KBH (Taiwan Semiconductor Corporation) are parametric equivalents to the NRVS3KB. Both parts match all critical electrical specifications (800 V, 3 A, 1.15 V forward voltage, 1.5 µs recovery time) and share the identical DO-214AA (SMB) package. The S3KBH carries automotive-grade qualification and AEC-Q101 certification, matching the original part's compliance profile. The S3KB lacks explicit automotive grading but maintains full electrical equivalence. Both parts are in active production status with substantially higher inventory availability (75,300 and 7,146 pieces respectively) compared to the NRVS3KB's Last Time Buy status.

Similar Part (Alternative Package):

The S3KHE3_A/I (Vishay General Semiconductor - Diodes Division) is a similar part with equivalent electrical performance but uses the DO-214AB (SMC) package instead of DO-214AA (SMB). This part maintains 800 V reverse voltage, 3 A current rating, and automotive AEC-Q101 qualification. The reverse recovery time is 2.5 µs (longer than the 1.5 µs specification) and capacitance is 60 pF (higher than 40 pF). The forward voltage specification is rated at 2.5 A rather than 3 A. This part is suitable for applications where package footprint differences are acceptable and the slightly extended recovery time does not impact circuit performance.

Selection Criteria:

For direct replacement in existing designs without PCB modification, select S3KB or S3KBH. The S3KBH is preferred for automotive applications requiring AEC-Q101 certification. For applications permitting package form factor changes, the S3KHE3_A/I provides an alternative with active production status and automotive qualification.

Frequently Asked Questions (FAQ)

Q: Can the S3KB be used as a direct replacement for the NRVS3KB?

A: Yes. The S3KB matches all critical electrical parameters (800 V reverse voltage, 3 A current, 1.15 V forward voltage, 1.5 µs recovery time) and uses the identical DO-214AA (SMB) package. No PCB modifications are required. However, the S3KB does not carry explicit automotive grading; verify compliance requirements for your application.

Q: What is the difference between S3KB and S3KBH?

A: Both parts are electrically identical with matching 800 V, 3 A, and 1.5 µs specifications in the DO-214AA package. The S3KBH carries automotive-grade qualification and AEC-Q101 certification, while the S3KB does not. The S3KBH is packaged in Tape & Reel (TR) format with 7,146 pieces in stock; the S3KB is available in Cut Tape (CT) & Digi-Reel® format with 75,300 pieces in stock.

Q: Can the S3KHE3_A/I replace the NRVS3KB in my design?

A: The S3KHE3_A/I is electrically compatible but uses the DO-214AB (SMC) package instead of DO-214AA (SMB). This requires PCB layout modification. The reverse recovery time is 2.5 µs (versus 1.5 µs for the NRVS3KB) and capacitance is 60 pF (versus 40 pF). Evaluate whether these parameter differences and package change are acceptable for your circuit.

Q: Why is the NRVS3KB marked as Last Time Buy?

A: Last Time Buy status indicates onsemi has discontinued production of this part. Existing inventory of 1,103 pieces represents the final available stock. Transition to an active substitute part is necessary for long-term supply chain continuity.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The NRVS3KB, S3KB, S3KBH, and S3KHE3_A/I are all ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Q: Which substitute part has the best inventory availability?

A: The S3KB (Taiwan Semiconductor Corporation) has the highest inventory with 75,300 pieces in stock, followed by S3KBH with 7,146 pieces and S3KHE3_A/I with 4,369 pieces.

Q: Do all substitute parts support the same operating temperature range?

A: Yes. The NRVS3KB, S3KB, S3KBH, and S3KHE3_A/I all operate across the -55°C to 150°C junction temperature range.