RS1K Equivalent & Substitute Parts

Part Overview

The RS1K is a general-purpose rectifier diode manufactured by onsemi, rated for 800 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status within onsemi's product portfolio. Identifying equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original part is no longer available or procurement becomes impractical.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns	-
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Capacitance @ Vr, F	10	pF @ 4V, 1MHz
Mounting Type	Surface Mount	-
Package / Case	DO-214AC, SMA	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the RS1K is determined by strict electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) must equal or exceed 800 V
Current - Average Rectified (Io) must equal or exceed 1 A
Voltage - Forward (Vf) must not exceed 1.3 V @ 1 A
Reverse Recovery Time (trr) must not exceed 500 ns for fast recovery classification
Current - Reverse Leakage must not exceed 5 µA @ rated voltage

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount (required)
Package / Case: DO-214AC (SMA) or equivalent footprint
Operating Temperature Range: Must support -55°C to 150°C minimum

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into three categories based on their relationship to the RS1K:

Direct Equivalents (Vishay): Parts with identical electrical specifications, same package, and active product status
Functional Equivalents (onsemi, EVVO Semi, Diodes Incorporated): Parts meeting all electrical requirements with same or superior ratings
Package Variants (Vishay DO-214BA): Parts with identical electrical performance but different package footprint (DO-214BA instead of DO-214AC)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed Classification	trr [ns]	Ir @ Vr [µA]	Package	Product Status	Temp Range [°C]
RS1K	onsemi	800	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	5 @ 800V	DO-214AC (SMA)	Not For New Designs	-55 to 150
MRA4006T3G	onsemi	800	1	1.1 @ 1A	Standard Recovery >500ns	-	10 @ 800V	DO-214AC (SMA)	Not For New Designs	-55 to 175
MRA4007T3G	onsemi	1000	1	1.1 @ 1A	Standard Recovery >500ns	-	10 @ 1000V	DO-214AC (SMA)	Not For New Designs	-55 to 175
NRVA4006T3G	onsemi	800	1	1.1 @ 1A	Standard Recovery >500ns	-	10 @ 800V	DO-214AC (SMA)	Not For New Designs	-55 to 150
RS1M	EVVO Semi	1000	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	5 @ 1kV	DO-214AC (SMA)	Active	-55 to 150
RGF1K-E3/67A	Vishay General Semiconductor - Diodes Division	800	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	5 @ 800V	DO-214BA (GF1)	Active	-65 to 175
RS1K-E3/5AT	Vishay General Semiconductor - Diodes Division	800	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	5 @ 800V	DO-214AC (SMA)	Active	-55 to 150
RS1K-E3/61T	Vishay General Semiconductor - Diodes Division	800	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	5 @ 800V	DO-214AC (SMA)	Active	-55 to 150
RS1K-13-F	Diodes Incorporated	800	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	5 @ 800V	DO-214AC (SMA)	Active	-65 to 150
GF1K-E3/67A	Vishay General Semiconductor - Diodes Division	800	1	1.2 @ 1A	Standard Recovery >500ns	2000	5 @ 800V	DO-214BA (GF1)	Active	-65 to 175
GF1M-E3/5CA	Vishay General Semiconductor - Diodes Division	1000	1	1.2 @ 1A	Standard Recovery >500ns	2000	5 @ 1000V	DO-214BA (GF1)	Active	-65 to 175

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

The RS1K-E3/61T (Vishay General Semiconductor - Diodes Division) and RS1K-E3/5AT (Vishay General Semiconductor - Diodes Division) are the preferred direct substitutes. Both parts maintain identical electrical specifications to the RS1K, including 800 V reverse voltage, 1 A current rating, 1.3 V forward voltage, fast recovery characteristics with 500 ns reverse recovery time, and the same DO-214AC (SMA) package footprint. Both are classified as Active products, ensuring long-term availability and supply chain stability. These parts are ROHS3 compliant and carry MSL 1 (Unlimited) rating, matching the original part's environmental qualifications.

Secondary Substitutes (Functional Equivalents with Enhanced Ratings):

The RS1M (EVVO Semi) provides identical electrical performance to the RS1K with an upgraded voltage rating of 1000 V, offering superior overvoltage margin. This part is Active and maintains the same DO-214AC (SMA) package, fast recovery speed, and operating temperature range. The RS1K-13-F (Diodes Incorporated) offers identical 800 V specifications with extended lower temperature operation (-65°C minimum) and is Active status.

Package Variant Substitutes (DO-214BA Footprint):

The RGF1K-E3/67A (Vishay SUPERECTIFIER® series) provides identical electrical performance in a DO-214BA (GF1) package. This part is suitable only if the circuit board layout accommodates the different footprint. The GF1K-E3/67A offers similar performance with standard recovery characteristics and extended temperature range (-65°C to 175°C).

Higher Voltage Alternatives:

The MRA4007T3G (onsemi) and GF1M-E3/5CA (Vishay) provide 1000 V ratings for applications requiring enhanced voltage margin. These parts are suitable for circuits where the additional voltage headroom does not conflict with forward voltage or recovery time requirements.

Avoid for New Designs:

MRA4006T3G and NRVA4006T3G are classified as "Not For New Designs" and should be used only for legacy system maintenance where the original RS1K is unavailable.

Frequently Asked Questions (FAQ)

Q: Can I use MRA4006T3G as a direct replacement for RS1K?

A: MRA4006T3G meets the voltage and current requirements but differs in recovery speed classification (Standard Recovery >500ns versus Fast Recovery ≤500ns) and reverse leakage current (10 µA versus 5 µA). Both parts are classified "Not For New Designs." For active product substitution, use RS1K-E3/61T or RS1K-E3/5AT instead.

Q: What is the difference between RS1K-E3/61T and RS1K-E3/5AT?

A: Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications (800 V, 1 A, 1.3 V forward voltage, 500 ns recovery time). The difference is in packaging configuration: RS1K-E3/61T is supplied in Tape & Reel (TR) with 174,300 pieces in stock, while RS1K-E3/5AT is also Tape & Reel with 7,378 pieces in stock. Both are Active products with the same DO-214AC (SMA) package.

Q: Can I substitute RS1K with a higher voltage part like MRA4007T3G?

A: Yes, MRA4007T3G (1000 V rating) is electrically compatible for applications where the RS1K (800 V) is used, as it exceeds the voltage requirement. However, MRA4007T3G has Standard Recovery characteristics (>500ns) versus the RS1K's Fast Recovery (≤500ns), which may affect switching performance in high-frequency circuits. Verify circuit timing requirements before substitution.

Q: What is the difference between DO-214AC (SMA) and DO-214BA (GF1) packages?

A: Both are surface mount packages for 1 A rectifier diodes, but they have different physical footprints. DO-214AC (SMA) is the original RS1K package. DO-214BA (GF1) is used by Vishay's SUPERECTIFIER® series (RGF1K-E3/67A, GF1K-E3/67A). Substitution between these packages requires circuit board layout modification and is not a direct drop-in replacement.

Q: Is RS1M from EVVO Semi a suitable substitute?

A: Yes, RS1M is a suitable substitute with enhanced specifications. It provides 1000 V reverse voltage (versus 800 V), identical 1 A current rating, matching 1.3 V forward voltage, and identical fast recovery characteristics (500 ns). RS1M is Active status and uses the same DO-214AC (SMA) package. The higher voltage rating provides additional design margin without compromising compatibility.

Q: Why should I avoid MRA4006T3G and NRVA4006T3G?

A: Both parts are classified "Not For New Designs" by onsemi, indicating end-of-life status. While they meet basic voltage and current requirements, they exhibit Standard Recovery characteristics (>500ns) and higher reverse leakage (10 µA). These parts should be used only for legacy system maintenance where original RS1K parts are unavailable. For new applications or ongoing production, use Active-status alternatives such as RS1K-E3/61T or RS1K-13-F.

Q: What is the operating temperature range difference between RS1K and its substitutes?

A: The RS1K operates from -55°C to 150°C. Most Vishay substitutes (RS1K-E3/61T, RS1K-E3/5AT) maintain this range. However, RS1K-13-F (Diodes Incorporated) extends the lower limit to -65°C, and Vishay's DO-214BA variants (RGF1K-E3/67A, GF1K-E3/67A, GF1M-E3/5CA) extend the upper limit to 175°C. Verify your application's temperature requirements before selecting a substitute.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original RS1K's environmental qualifications.

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