RGF1K Equivalent & Substitute Parts Reference

Part Overview

The RGF1K is a general-purpose rectifier diode manufactured by onsemi, rated for 800 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Finding equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original component is no longer available or procurement is limited.

The RGF1K features fast recovery characteristics (≤500 ns) with a maximum forward voltage of 1.3 V at 1 A, making it suitable for applications requiring rapid switching performance in rectification circuits operating at 800 V.

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 @ 1 A	V
Speed Classification	Fast Recovery ≤500ns, >200mA	-
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5 @ 800 V	µA
Capacitance @ Vr, F	8.5 @ 4V, 1MHz	pF
Package / Case	DO-214AC, SMA	-
Operating Temperature - Junction	-65 to 175	°C
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the RGF1K is determined by strict electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Requirements:

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 significantly exceed 1.3 V at 1 A to maintain circuit performance
Speed classification and reverse recovery time determine switching behavior in high-frequency applications

Mechanical Compatibility Requirements:

Package / Case must be DO-214AC (SMA) or DO-214BA (GF1) for direct PCB footprint compatibility
Mounting Type must be Surface Mount
Operating Temperature range must support the application's thermal requirements

Compliance Requirements:

RoHS3 Compliance mandatory for new procurement
MSL rating of 1 (Unlimited) ensures handling compatibility

Substitute parts are grouped into three categories:

Direct Electrical & Package Equivalents (800 V, 1 A, DO-214AC/SMA): Parts with identical voltage and current ratings in the same package footprint
Higher Voltage Alternatives (1000 V, 1 A, DO-214AC/SMA or DO-214BA): Parts with elevated voltage ratings suitable for applications with voltage margin requirements
Alternative Package Variants (800 V, 1 A, DO-214BA): Parts with identical electrical ratings but different package geometry (DO-214BA instead of DO-214AC)

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ 1A (V)	Speed	trr (ns)	Package	Temp Range (°C)	Status
RGF1K	onsemi	800	1	1.3	Fast ≤500ns	500	DO-214AC	-65 to 175	Not For New Designs
RS1K	Fairchild Semiconductor	800	1	1.3	Fast ≤500ns	500	DO-214AC	-55 to 150	Active
RGF1K-E3/67A	Vishay General Semiconductor	800	1	1.3	Fast ≤500ns	500	DO-214BA	-65 to 175	Active
CFRA106-G	Comchip Technology	800	1	1.3	Fast ≤500ns	500	DO-214AC	-55 to 150	Active
CGRA4006-G	Comchip Technology	800	1	1.1	Fast ≤500ns	-	DO-214AC	-55 to 150	Active
GF1K-E3/67A	Vishay General Semiconductor	800	1	1.2	Standard >500ns	2000	DO-214BA	-65 to 175	Active
NRVA4006T3G	onsemi	800	1	1.1	Standard >500ns	-	DO-214AC	-55 to 150	Not For New Designs
MRA4007T3G	onsemi	1000	1	1.1	Standard >500ns	-	DO-214AC	-55 to 175	Not For New Designs
GF1M-E3/67A	Vishay General Semiconductor	1000	1	1.2	Standard >500ns	2000	DO-214BA	-65 to 175	Active
GF1M-E3/5CA	Vishay General Semiconductor	1000	1	1.2	Standard >500ns	2000	DO-214BA	-65 to 175	Active
GS1M-LTP	Micro Commercial Co	1000	1	1.0	Standard >500ns	-	DO-214AC	-55 to 150	Active

Engineering Selection Recommendations

For Direct Replacement (800 V, 1 A, Fast Recovery, DO-214AC Package):

RS1K (Fairchild Semiconductor) is the primary direct substitute for RGF1K. Both parts share identical electrical specifications (800 V, 1 A, 1.3 V forward voltage, 500 ns recovery time) and the same DO-214AC package footprint. RS1K is currently in Active product status, ensuring ongoing availability. The operating temperature range is -55°C to 150°C, which is narrower than RGF1K's -65°C to 175°C; verify application requirements before selection.

CFRA106-G (Comchip Technology) provides an alternative direct replacement with identical electrical and package specifications. This part is Active status and suitable for applications not requiring the extended -65°C lower temperature limit.

For Package-Compatible Substitution (800 V, 1 A, DO-214BA Package):

RGF1K-E3/67A (Vishay General Semiconductor, SUPERECTIFIER® series) matches all electrical parameters of RGF1K but uses the DO-214BA (GF1) package instead of DO-214AC. This part is Active status and maintains the full -65°C to 175°C operating range. PCB layout modification is required due to different package geometry.

GF1K-E3/67A (Vishay General Semiconductor, SUPERECTIFIER® series) provides an 800 V, 1 A alternative in DO-214BA package with slightly lower forward voltage (1.2 V) and standard recovery characteristics (2 µs). This part is Active status with full temperature range support.

For Higher Voltage Applications (1000 V, 1 A):

GF1M-E3/67A and GF1M-E3/5CA (Vishay General Semiconductor, SUPERECTIFIER® series) both provide 1000 V rating in DO-214BA package with 1 A current capacity. Both are Active status with full -65°C to 175°C temperature range. These parts are suitable for applications requiring voltage margin above 800 V.

GS1M-LTP (Micro Commercial Co) offers 1000 V, 1 A in DO-214AC package (same footprint as RGF1K) with the lowest forward voltage (1.0 V @ 1 A). This part is Active status but limited to -55°C to 150°C operating range.

Compliance & Availability Considerations:

All recommended substitutes are RoHS3 Compliant and carry MSL rating of 1 (Unlimited), matching RGF1K's compliance profile. Parts with Active product status (RS1K, RGF1K-E3/67A, CFRA106-G, GF1K-E3/67A, GF1M-E3/67A, GF1M-E3/5CA, GS1M-LTP) are preferred for new procurement due to ongoing manufacturer support and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can RS1K directly replace RGF1K without PCB modification?

A: Yes. RS1K and RGF1K share identical electrical specifications (800 V, 1 A, 1.3 V forward voltage, 500 ns recovery time) and both use the DO-214AC (SMA) package. Direct PCB footprint compatibility is confirmed. Verify the application's operating temperature range does not require the extended -65°C lower limit, as RS1K is rated -55°C to 150°C.

Q: What is the difference between DO-214AC and DO-214BA packages?

A: DO-214AC (SMA) and DO-214BA (GF1) are different surface mount diode package geometries with different PCB footprints. Parts in DO-214BA package (such as RGF1K-E3/67A, GF1K-E3/67A, GF1M-E3/67A) require PCB layout modification and cannot be used as drop-in replacements for DO-214AC parts without redesign.

Q: Why do some substitutes have 1000 V rating instead of 800 V?

A: Higher voltage-rated diodes (1000 V) can substitute for 800 V applications because they exceed the minimum voltage requirement. The 1000 V rating provides additional voltage margin and safety headroom. However, verify that the application circuit design does not depend on the specific 800 V characteristic. Forward voltage and recovery time may differ; review the parameter comparison table for circuit performance impact.

Q: What does "Fast Recovery ≤500ns" versus "Standard Recovery >500ns" mean for substitution?

A: Recovery time (trr) determines how quickly the diode transitions from conducting to blocking state. Fast recovery (≤500 ns) is required for high-frequency switching applications. Standard recovery (>500 ns) is suitable for lower-frequency rectification. RGF1K specifies fast recovery; substitutes with standard recovery (such as GF1K-E3/67A with 2 µs trr) may not be suitable for high-frequency circuits. Verify application switching frequency before selecting standard recovery alternatives.

Q: Is NRVA4006T3G a suitable substitute?

A: NRVA4006T3G matches RGF1K's 800 V, 1 A electrical specifications and DO-214AC package but has standard recovery characteristics (>500 ns) instead of fast recovery. Additionally, NRVA4006T3G is classified as "Not For New Designs" with automotive qualification (AEC-Q101), limiting its general availability. RS1K or CFRA106-G are preferred alternatives with Active status and fast recovery characteristics.

Q: Can I use GS1M-LTP as a direct replacement?

A: GS1M-LTP provides 1000 V, 1 A in the same DO-214AC package as RGF1K, enabling direct PCB compatibility. However, GS1M-LTP has standard recovery characteristics (>500 ns) instead of fast recovery, and its operating temperature range is limited to -55°C to 150°C. Use GS1M-LTP only if the application does not require fast recovery performance and operates within the specified temperature range.

Q: What is the significance of "Not For New Designs" status?

A: "Not For New Designs" indicates the manufacturer has discontinued active development and is phasing out the part. While existing inventory may be available, long-term procurement cannot be guaranteed. For new designs or long-term production, select substitutes with "Active" product status such as RS1K, RGF1K-E3/67A, CFRA106-G, or GF1K-E3/67A.

Q: Are all substitutes RoHS3 Compliant?

A: Yes. All substitute parts listed in this reference are RoHS3 Compliant and carry MSL rating of 1 (Unlimited), matching RGF1K's environmental and handling compliance profile.

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