NRVUS2KA Equivalent & Substitute Parts

Part Overview

The NRVUS2KA is a general-purpose rectifier diode manufactured by onsemi, rated for 800 V DC reverse voltage and 1.5 A average rectified current in a surface mount DO-214AC (SMA) package. This device is classified as "Not For New Designs," indicating it has been superseded in onsemi's product portfolio. Identifying equivalent and substitute parts is necessary for applications requiring continued support, inventory management, or design flexibility across multiple suppliers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.7 @ 1.5	V @ A
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	5 @ 800	µA @ V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the NRVUS2KA are classified into two categories based on electrical parameter alignment:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 800 V reverse voltage, 1.5 A average rectified current, 1.7 V forward voltage at 1.5 A, 75 ns reverse recovery time, and 30 pF capacitance at 4 V. These parts are direct functional replacements with no derating required.

Similar Parts share the same 800 V reverse voltage and surface mount SMA package but differ in one or more electrical characteristics. These parts require design review to confirm compatibility within the application's operational constraints.

The following parameters determine substitution eligibility:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 800 V
Current - Average Rectified (Io): Must equal or exceed 1.5 A
Package / Case: Must be DO-214AC or SMA
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must encompass application requirements

Parameter Comparison

Parameter	NRVUS2KA (onsemi)	US2KA (onsemi)	HS2KA (TSC)	S2KA-13-F (Diodes Inc.)	US1K-13-F (Diodes Inc.)
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V	800 V	800 V
Current - Average Rectified (Io)	1.5 A	1.5 A	1.5 A	1.5 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1.5 A	1.7 V @ 1.5 A	1.7 V @ 1.5 A	1.15 V @ 1.5 A	1.7 V @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Standard Recovery > 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Reverse Recovery Time (trr)	75 ns	75 ns	75 ns	Not specified	75 ns
Current - Reverse Leakage @ Vr	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V	5 µA @ 800 V
Capacitance @ Vr, F	30 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz	20 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-65 to 150°C	-65 to 150°C
Product Status	Not For New Designs	Not For New Designs	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacements):

US2KA (onsemi) and HS2KA (Taiwan Semiconductor Corporation) are parametric equivalents to NRVUS2KA. Both maintain identical electrical specifications including 800 V reverse voltage, 1.5 A average rectified current, 1.7 V forward voltage at 1.5 A, 75 ns reverse recovery time, and 30 pF capacitance. HS2KA carries Active product status, making it suitable for new designs and long-term availability. US2KA retains Not For New Designs status, matching the original part classification. Both are ROHS3 compliant and qualified to AEC-Q101 automotive standards where applicable.

Similar Parts (Design Review Required):

S2KA-13-F (Diodes Incorporated) matches the 800 V reverse voltage and 1.5 A current rating but exhibits lower forward voltage (1.15 V @ 1.5 A versus 1.7 V) and standard recovery speed (> 500ns) rather than fast recovery. This part is Active status and suitable for applications where lower forward voltage drop is beneficial or where recovery speed is not a constraint. Operating temperature range extends to -65°C, providing wider low-temperature coverage.

US1K-13-F (Diodes Incorporated) is rated for 1 A average rectified current, which is below the 1.5 A specification of NRVUS2KA. This part is suitable only for applications where the actual current requirement does not exceed 1 A. It maintains 800 V reverse voltage, fast recovery characteristics (75 ns), and Active product status. Lower capacitance (10 pF) may benefit high-frequency switching applications.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status. HS2KA and both Diodes Incorporated parts carry Active product status, ensuring continued manufacturing and supply chain support. Inventory availability is highest for S2KA-13-F (77,100 pcs) and US1K-13-F (125,400 pcs), followed by US2KA (39,900 pcs) and HS2KA (15,973 pcs).

Frequently Asked Questions (FAQ)

Q: Can US2KA be used as a direct replacement for NRVUS2KA?

A: Yes. US2KA is a parametric equivalent with identical electrical specifications: 800 V reverse voltage, 1.5 A average rectified current, 1.7 V forward voltage at 1.5 A, 75 ns reverse recovery time, and 30 pF capacitance. Both are manufactured by onsemi and packaged in DO-214AC (SMA). No circuit modifications are required.

Q: What is the difference between HS2KA and NRVUS2KA?

A: HS2KA (Taiwan Semiconductor Corporation) and NRVUS2KA are parametric equivalents with identical electrical performance. The primary difference is product status: HS2KA is Active, while NRVUS2KA is Not For New Designs. HS2KA is recommended for applications requiring long-term supply assurance.

Q: Can S2KA-13-F replace NRVUS2KA in all applications?

A: S2KA-13-F shares the same 800 V reverse voltage and 1.5 A current rating but differs in forward voltage (1.15 V versus 1.7 V) and recovery speed (standard versus fast). It is suitable for applications where lower forward voltage drop is acceptable and where recovery speed is not a critical parameter. Design review is required to confirm compatibility.

Q: Why is US1K-13-F listed as a substitute if it is rated for only 1 A?

A: US1K-13-F is listed as a similar part for applications where the actual average rectified current requirement does not exceed 1 A. It maintains the 800 V reverse voltage and fast recovery characteristics. It is not a direct replacement for 1.5 A applications.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts are packaged in DO-214AC (SMA) surface mount format, matching the NRVUS2KA package specification. No PCB layout modifications are required for mechanical compatibility.

Q: Which substitute part has the best long-term availability?

A: S2KA-13-F (Diodes Incorporated) and US1K-13-F (Diodes Incorporated) both carry Active product status and have the highest inventory levels (77,100 pcs and 125,400 pcs respectively), indicating strong long-term supply commitment. HS2KA (Active status, 15,973 pcs) is also suitable for long-term applications.

Q: Do all substitute parts meet automotive qualification requirements?

A: NRVUS2KA carries AEC-Q101 automotive qualification. Automotive qualification status for substitute parts is not specified in the provided data. Applications requiring automotive-grade components should verify AEC-Q101 compliance with the respective manufacturers.

Q: What is the impact of lower capacitance in US1K-13-F?

A: US1K-13-F has 10 pF capacitance at 4 V compared to 30 pF in NRVUS2KA. Lower capacitance reduces parasitic effects in high-frequency switching applications and may improve switching performance. This is beneficial in applications where junction capacitance is a design constraint.

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