CFRA104-G Equivalent & Substitute Parts Reference

Part Overview

The CFRA104-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when electrical parameters and mechanical compatibility align with the main part specifications. The CFRA104-G serves as a reference baseline for equivalent rectifier diodes across multiple manufacturers, enabling design flexibility and supply chain alternatives.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1 A
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: ≤ 1.3 V @ 1 A
Current - Reverse Leakage @ Vr: ≤ 5 µA @ 400 V
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Package Compatibility: Substitute parts must use either DO-214AC (SMA) or DO-214BA (GF1) package formats. DO-214BA represents a mechanical variant with identical electrical performance and footprint compatibility in most applications.

Reverse Recovery Time (trr): The CFRA104-G specifies 150 ns. Substitute parts with equal or faster recovery times (≤ 150 ns) are electrically compatible. Parts with faster recovery times (50 ns, 35 ns, 25 ns) represent performance enhancements and are direct substitutes.

Operating Temperature Range: The CFRA104-G maximum junction temperature is 150°C. Substitute parts with equal or extended temperature ranges are acceptable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V @ A]	trr [ns]	Ir @ Vr [µA @ V]	Package	Tj (Max) [°C]	Product Status
CFRA104-G	Comchip Technology	400	1	1.3 @ 1	150	5 @ 400	DO-214AC (SMA)	150	Active
CURA104-G	Comchip Technology	400	1	1.3 @ 1	50	5 @ 400	DO-214AC (SMA)	150	Active
RGF1G-E3/67A	Vishay General Semiconductor - Diodes Division	400	1	1.3 @ 1	150	5 @ 400	DO-214BA (GF1)	175	Active
RS1G	Taiwan Semiconductor Corporation	400	1	1.3 @ 1	150	5 @ 400	DO-214AC (SMA)	150	Active
RS1G-E3/5AT	Vishay General Semiconductor - Diodes Division	400	1	1.3 @ 1	150	5 @ 400	DO-214AC (SMA)	150	Active
RS1G-E3/61T	Vishay General Semiconductor - Diodes Division	400	1	1.3 @ 1	150	5 @ 400	DO-214AC (SMA)	150	Active
RGF1G	onsemi	400	1	1.3 @ 1	150	5 @ 400	DO-214AC (SMA)	175	Not For New Designs
RS1G-13-F	Diodes Incorporated	400	1	1.3 @ 1	150	5 @ 400	DO-214AC (SMA)	150	Active
CMR1U-04M TR13 PBFREE	Central Semiconductor Corp	400	1	1.25 @ 1	50	5 @ 400	DO-214AC (SMA)	175	Active
ES1G-13-F	Diodes Incorporated	400	1	1.25 @ 1	25	5 @ 400	DO-214AC (SMA)	150	Active
ES1G-LTP	Micro Commercial Co	400	1	1.25 @ 1	35	5 @ 400	DO-214AC (SMA)	175	Active

Engineering Selection Recommendations

Primary Substitutes (Identical Electrical and Mechanical Specifications):

Parts RS1G, RS1G-E3/5AT, and RS1G-E3/61T from Vishay General Semiconductor - Diodes Division and RS1G from Taiwan Semiconductor Corporation provide direct electrical equivalence to CFRA104-G with identical reverse recovery time (150 ns), forward voltage (1.3 V @ 1 A), and DO-214AC package format. These parts are Active product status and suitable for new designs.

Enhanced Performance Substitutes (Faster Recovery Time):

CURA104-G (Comchip Technology, 50 ns trr), CMR1U-04M TR13 PBFREE (Central Semiconductor Corp, 50 ns trr), ES1G-LTP (Micro Commercial Co, 35 ns trr), and ES1G-13-F (Diodes Incorporated, 25 ns trr) offer reduced reverse recovery time while maintaining all other electrical parameters. These parts are electrically superior and backward compatible. All are Active product status.

Package Variant Substitute (DO-214BA):

RGF1G-E3/67A from Vishay General Semiconductor - Diodes Division uses DO-214BA (GF1) package instead of DO-214AC (SMA). Electrical parameters are identical to CFRA104-G. This variant is suitable when DO-214BA footprint compatibility is required. Product status is Active.

Obsolescence Consideration:

RGF1G from onsemi carries "Not For New Designs" product status. While electrically equivalent, this part should not be selected for new circuit designs. Existing designs using this part may continue with current inventory.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, matching the CFRA104-G baseline. REACH status is Unaffected for all listed parts.

Frequently Asked Questions (FAQ)

Q: Can I substitute CFRA104-G with RS1G-E3/5AT?

A: Yes. RS1G-E3/5AT from Vishay General Semiconductor - Diodes Division meets all electrical parameters: 400 V reverse voltage, 1 A average rectified current, 1.3 V forward voltage @ 1 A, 150 ns reverse recovery time, and 5 µA reverse leakage @ 400 V. Both use DO-214AC (SMA) package. Product status is Active.

Q: What is the difference between CFRA104-G and CURA104-G?

A: Both are manufactured by Comchip Technology with identical electrical ratings except reverse recovery time. CURA104-G specifies 50 ns trr compared to CFRA104-G at 150 ns. This represents faster switching performance. CURA104-G is a performance upgrade and direct substitute.

Q: Can I use RGF1G-E3/67A as a substitute?

A: Yes, with package consideration. RGF1G-E3/67A uses DO-214BA (GF1) package instead of DO-214AC (SMA). Electrical parameters are identical. Verify PCB footprint compatibility before substitution. Product status is Active.

Q: Why would I choose ES1G-13-F over CFRA104-G?

A: ES1G-13-F from Diodes Incorporated offers faster reverse recovery time (25 ns vs. 150 ns) and lower forward voltage (1.25 V vs. 1.3 V @ 1 A). These characteristics reduce switching losses and heat generation. Selection depends on circuit performance requirements. Product status is Active.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, matching CFRA104-G specifications.

Q: What does "Not For New Designs" mean for RGF1G?

A: This product status indicates the part is obsolete or being phased out by the manufacturer. While electrically equivalent and currently in stock, RGF1G should not be selected for new circuit designs. Use Active status parts instead.

Q: Can I mix different substitute parts in the same circuit?

A: Yes. All listed substitute parts meet identical electrical specifications for voltage, current, and leakage parameters. Mixing parts from different manufacturers is acceptable from an electrical standpoint. Verify component availability and lead times with your supplier.

Q: Does reverse recovery time affect circuit performance?

A: Yes. Faster reverse recovery time (lower trr value) reduces switching losses and electromagnetic interference. Parts with 25 ns, 35 ns, or 50 ns trr are performance enhancements over the 150 ns baseline. Selection depends on circuit switching frequency and thermal requirements.

Q: What is the significance of forward voltage differences?

A: Forward voltage affects power dissipation and heat generation. ES1G-13-F and CMR1U-04M TR13 PBFREE specify 1.25 V @ 1 A compared to CFRA104-G at 1.3 V @ 1 A. Lower forward voltage reduces power loss by approximately 3.8% at rated current, beneficial in high-current or thermally constrained applications.

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