RGF1M General Purpose Rectifier Diode 1KV 1A DO-214AC Equivalent & Substitute Parts

Part Overview

The RGF1M is a general purpose rectifier diode manufactured by onsemi, rated for 1000 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 This component is classified as "Not For New Designs," indicating it has been superseded in onsemi's product portfolio. Identifying equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the original specification must be maintained or where compatible alternatives with improved availability or performance characteristics are required.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5 µA @ 1000 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	—

Substitute Part Grouping Explanation

Substitution of the RGF1M is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 1000 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Package / Case: Must be DO-214AC (SMA) or compatible surface mount package
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must accommodate the application's thermal requirements

Secondary Compatibility Factors:

Voltage - Forward (Vf): Lower values indicate improved efficiency; values up to 1.3 V @ 1 A are acceptable
Speed Classification: Fast Recovery (≤ 500ns) and Standard Recovery (>500ns) are both acceptable depending on circuit requirements
Reverse Recovery Time (trr): Relevant for high-frequency switching applications
Current - Reverse Leakage: Lower values indicate superior performance
RoHS and REACH Compliance: Must maintain regulatory compliance

Parts are grouped into three categories:

Category 1 - Direct Electrical & Package Equivalents: Parts with identical voltage, current, and package specifications (DO-214AC SMA, 1000 V, 1 A, Fast Recovery).

Category 2 - Functional Equivalents with Package Variation: Parts with identical electrical specifications but different package designations (DO-214BA instead of DO-214AC), requiring PCB layout verification.

Category 3 - Lower Voltage Alternatives: Parts rated for 800 V instead of 1000 V, suitable only for applications where the lower voltage rating is acceptable.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If (V)	Speed	trr (ns)	Package	Temp Range (°C)	Status
RGF1M	onsemi	1000	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	DO-214AC (SMA)	-65 to 175	Not For New Designs
MRA4007T3G	onsemi	1000	1	1.1 @ 1A	Standard Recovery >500ns	—	DO-214AC (SMA)	-55 to 175	Not For New Designs
CFRA107-G	Comchip Technology	1000	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	DO-214AC (SMA)	—	Active
CGRA4007-G	Comchip Technology	1000	1	1.1 @ 1A	Standard Recovery >500ns	—	DO-214AC (SMA)	-55 to 150	Active
CMR1-10M TR13 PBFREE	Central Semiconductor Corp	1000	1	1.1 @ 1A	Standard Recovery >500ns	—	DO-214AC (SMA)	-65 to 150	Active
CMR1F-10M BK PBFREE	Central Semiconductor Corp	1000	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	DO-214AC (SMA)	-65 to 150	Active
RGF1M-E3/67A	Vishay General Semiconductor	1000	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	DO-214BA (GF1)	-65 to 175	Active
GF1M-E3/5CA	Vishay General Semiconductor	1000	1	1.2 @ 1A	Standard Recovery >500ns	2000	DO-214BA (GF1)	-65 to 175	Active
MRA4006T3G	onsemi	800	1	1.1 @ 1A	Standard Recovery >500ns	—	DO-214AC (SMA)	-55 to 175	Not For New Designs
RS1K	Fairchild Semiconductor	800	1	1.3 @ 1A	Fast Recovery ≤ 500ns	500	DO-214AC (SMA)	-55 to 150	Active
GF1K-E3/67A	Vishay General Semiconductor	800	1	1.2 @ 1A	Standard Recovery >500ns	2000	DO-214BA (GF1)	-65 to 175	Active

Engineering Selection Recommendations

For Direct Replacement (Same Electrical & Package Specifications):

Select CFRA107-G (Comchip Technology) or CMR1F-10M BK PBFREE (Central Semiconductor Corp) when an exact electrical and package match is required. Both parts maintain 1000 V reverse voltage, 1 A current rating, DO-214AC (SMA) package, and Fast Recovery characteristics (≤ 500ns). CFRA107-G is classified as Active product status, providing superior long-term availability compared to the RGF1M's "Not For New Designs" status. Both parts are ROHS3 Compliant and REACH Unaffected.

For Improved Availability with Compatible Electrical Performance:

Select MRA4007T3G (onsemi) when maintaining the same manufacturer is preferred. This part provides identical voltage and current ratings in the same DO-214AC (SMA) package. The forward voltage is reduced to 1.1 V @ 1 A (compared to 1.3 V), offering improved efficiency. The trade-off is Standard Recovery classification (>500ns) instead of Fast Recovery. MRA4007T3G inventory availability is significantly higher (425,100 pcs) compared to RGF1M (19,080 pcs).

For Package Flexibility (DO-214BA Alternative):

Select RGF1M-E3/67A (Vishay General Semiconductor) when the application can accommodate a DO-214BA (GF1) package instead of DO-214AC (SMA). This part maintains identical electrical specifications (1000 V, 1 A, Fast Recovery, 500 ns trr) and operating temperature range (-65°C to 175°C). Active product status ensures ongoing availability. PCB layout and footprint compatibility must be verified before selection.

For Lower Voltage Applications (800 V Rating):

Select RS1K (Fairchild Semiconductor) only when the application's maximum reverse voltage requirement is 800 V or less. This part provides Fast Recovery characteristics and is classified as Active. Alternatively, GF1K-E3/67A (Vishay) offers the same 800 V rating with DO-214BA package and Active status, though with Standard Recovery characteristics.

Compliance Verification:

All recommended substitutes maintain ROHS3 Compliance and REACH Unaffected status, ensuring regulatory alignment with the original RGF1M specification.

Frequently Asked Questions (FAQ)

Q1: Can MRA4007T3G be used as a direct replacement for RGF1M?

A: MRA4007T3G is electrically compatible for applications where Standard Recovery (>500ns) performance is acceptable. Both parts are rated 1000 V, 1 A, and use the DO-214AC (SMA) package. The primary difference is recovery speed: RGF1M is Fast Recovery (≤ 500ns), while MRA4007T3G is Standard Recovery. In low-frequency rectification circuits, this difference is negligible. In high-frequency switching applications, the slower recovery time may introduce additional losses. Verify circuit operating frequency before selection.

Q2: What is the difference between DO-214AC and DO-214BA packages?

A: Both are surface mount packages for 1 A rectifier diodes, but they have different physical dimensions and footprints. DO-214AC (SMA) and DO-214BA (GF1) are not mechanically interchangeable without PCB redesign. If your PCB is designed for DO-214AC, you must select a substitute with DO-214AC package. If PCB layout can be modified, DO-214BA alternatives such as RGF1M-E3/67A or GF1M-E3/5CA are available.

Q3: Why is the forward voltage different between RGF1M (1.3 V) and MRA4007T3G (1.1 V)?

A: Forward voltage variation is a normal characteristic of different semiconductor manufacturers' processes and design approaches. Both values are within acceptable ranges for general purpose rectification. Lower forward voltage (1.1 V) results in reduced power dissipation and improved efficiency. Higher forward voltage (1.3 V) may indicate different doping profiles or junction design. For thermal-sensitive applications, the lower forward voltage option (MRA4007T3G) is preferable.

Q4: Can I use an 800 V rated diode (MRA4006T3G or RS1K) instead of the 1000 V RGF1M?

A: Only if your circuit's maximum reverse voltage does not exceed 800 V. Using an 800 V diode in a 1000 V application creates risk of diode failure and circuit malfunction. Verify the actual peak reverse voltage in your application before selecting a lower-rated substitute. If the application requires 1000 V rating, select only 1000 V or higher rated alternatives.

Q5: What does "Not For New Designs" status mean for RGF1M?

A: This designation indicates that onsemi has discontinued active development and marketing of the RGF1M. The part may still be available from inventory, but long-term supply cannot be guaranteed. For new designs or ongoing production, select alternatives with "Active" status such as CFRA107-G, CMR1-10M TR13 PBFREE, or MRA4007T3G to ensure sustained availability.

Q6: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts listed in this document are ROHS3 Compliant and REACH Unaffected, matching the regulatory compliance of the original RGF1M. This ensures compatibility with environmental and safety regulations across all major markets.

Q7: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time is the interval required for a diode to stop conducting after the applied voltage reverses. Fast Recovery (≤ 500ns) diodes are suitable for high-frequency switching applications and power supplies. Standard Recovery (>500ns) diodes are adequate for line-frequency rectification and low-frequency applications. If your circuit operates above 10 kHz, verify that the substitute part's recovery time is compatible with your switching frequency.

Q8: Which substitute offers the best long-term availability?

A: MRA4007T3G (onsemi) has the highest inventory level at 425,100 pcs and maintains Active product status. CFRA107-G (Comchip Technology) and CMR1-10M TR13 PBFREE (Central Semiconductor Corp) also have Active status with substantial inventory (894 pcs and 15,136 pcs respectively). For critical applications requiring guaranteed long-term supply, MRA4007T3G is the optimal choice.

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