CFRA106-G Equivalent & Substitute Parts Reference

Part Overview

The CFRA106-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 800V DC reverse voltage and 1A 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).

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers offer improved inventory availability, or when design requirements permit selection from qualified alternatives meeting identical or superior electrical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	800	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) Maximum @ 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
Mounting Type	Surface Mount	-
Package / Case	DO-214AC, SMA	-
Operating Temperature - Junction Maximum	150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution eligibility for the CFRA106-G is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) Maximum: 800V (exact match required)
Current - Average Rectified (Io): 1A (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: DO-214AC or SMA (mechanical compatibility required)

Secondary Compatibility Parameters:

Voltage - Forward (Vf) Maximum @ If: ≤ 1.3V @ 1A (equal or lower acceptable)
Reverse Recovery Time (trr): ≤ 500ns (equal or faster acceptable for fast recovery devices)
Current - Reverse Leakage @ Vr: ≤ 5µA @ 800V (equal or lower acceptable)
Operating Temperature - Junction: ≥ 150°C (equal or higher acceptable)
RoHS Status: ROHS3 Compliant (required)
Moisture Sensitivity Level: MSL 1 (required)

Substitute parts are grouped into two categories based on recovery speed classification: Fast Recovery devices (trr ≤ 500ns) and Standard Recovery devices (trr > 500ns). Fast Recovery substitutes maintain identical switching characteristics. Standard Recovery substitutes exhibit different transient behavior and are suitable only when circuit design permits slower recovery performance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ 1A (V)	Speed / trr	Ir @ 800V (µA)	Package	Tj (Max) °C	Product Status
CFRA106-G	Comchip Technology	800	1	1.3	Fast Recovery / 500ns	5	DO-214AC	150	Active
RGF1K-E3/67A	Vishay General Semiconductor	800	1	1.3	Fast Recovery / 500ns	5	DO-214BA	175	Active
RS1K	Fairchild Semiconductor	800	1	1.3	Fast Recovery / 500ns	5	DO-214AC	150	Active
RS1K-13-F	Diodes Incorporated	800	1	1.3	Fast Recovery / 500ns	5	DO-214AC	150	Active
GF1K-E3/67A	Vishay General Semiconductor	800	1	1.2	Standard Recovery / 2µs	5	DO-214BA	175	Active
GS1K-LTP	Micro Commercial Co	800	1	1.0	Standard Recovery / >500ns	10	DO-214AC	150	Active
MRA4006T3G	onsemi	800	1	1.1	Standard Recovery / >500ns	10	DO-214AC	175	Not For New Designs
RGF1K	onsemi	800	1	1.3	Fast Recovery / 500ns	5	DO-214AC	175	Not For New Designs
S1K-13-F	Diodes Incorporated	800	1	1.1	Standard Recovery / 3µs	5	DO-214AC	150	Active
US1K-13-F	Diodes Incorporated	800	1	1.7	Fast Recovery / 75ns	5	DO-214AC	150	Active
S1K	YAGEO	800	1	1.1	Not Specified	Not Specified	DO-214AC	Not Specified	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (Fast Recovery, Identical Specifications):

RS1K-13-F (Diodes Incorporated) and RS1K (Fairchild Semiconductor) are direct electrical equivalents to CFRA106-G. Both maintain 800V/1A ratings, 1.3V forward voltage, 500ns recovery time, and 5µA reverse leakage. Both are Active product status with ROHS3 compliance. RS1K-13-F offers significantly higher inventory availability (85,200 units) compared to CFRA106-G (966 units).

RGF1K-E3/67A (Vishay General Semiconductor) is electrically equivalent with identical fast recovery characteristics and superior operating temperature range (-65°C to 175°C versus -55°C to 150°C). Product status is Active. Package variant is DO-214BA instead of DO-214AC; mechanical compatibility must be verified for board layout.

Fast Recovery Alternatives with Performance Variations:

US1K-13-F (Diodes Incorporated) maintains fast recovery speed (75ns, superior to 500ns) but exhibits elevated forward voltage (1.7V @ 1A versus 1.3V). This results in increased power dissipation and is suitable only when thermal design accommodates higher losses. Product status is Active with high inventory (125,400 units).

Standard Recovery Alternatives:

GS1K-LTP (Micro Commercial Co), GF1K-E3/67A (Vishay), S1K-13-F (Diodes Incorporated), and MRA4006T3G (onsemi) employ standard recovery topology (trr > 500ns). These devices are suitable only when circuit design does not require fast switching transient response. GS1K-LTP offers lowest forward voltage (1.0V @ 1A) but exhibits higher reverse leakage (10µA). GF1K-E3/67A and RGF1K-E3/67A are Vishay SUPERECTIFIER® series devices with extended temperature range.

Inventory and Availability Considerations:

S1K-13-F (Diodes Incorporated) provides highest inventory availability at 215,900 units. RS1K (Fairchild) offers 106,700 units. MRA4006T3G (onsemi) provides 45,300 units. RGF1K (onsemi) is marked Not For New Designs and should be avoided for new circuit designs despite 39,900 unit availability.

Compliance and Regulatory Status:

All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level. All are EAR99 classified with identical HTSUS code 8541.10.0080. REACH status is Unaffected for all parts.

Frequently Asked Questions (FAQ)

Q: Can I substitute CFRA106-G with a Standard Recovery diode like GS1K-LTP?

A: Standard Recovery substitutes are electrically compatible for DC voltage and current ratings but exhibit different transient behavior due to longer recovery time (>500ns versus 500ns). Substitution is permissible only when circuit design does not depend on fast switching response. Verify switching frequency and transient requirements before selection.

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

A: Both are surface mount packages with identical electrical performance. DO-214AC (SMA) and DO-214BA (GF1) differ in physical dimensions and lead configuration. Mechanical compatibility with PCB footprint must be verified. Consult package datasheets for specific dimensional requirements.

Q: Why does US1K-13-F have higher forward voltage (1.7V) than CFRA106-G (1.3V)?

A: Forward voltage variation reflects different semiconductor material composition and junction design. Higher forward voltage results in increased power dissipation (P = Vf × I). US1K-13-F is suitable only when thermal design accommodates additional heat generation. Calculate power dissipation for your specific application current before selection.

Q: Is RGF1K suitable for new designs?

A: RGF1K is marked Not For New Designs by manufacturer onsemi. This designation indicates the part is in mature/legacy status and may face future discontinuation. For new circuit designs, select from Active status parts: RS1K-13-F, RGF1K-E3/67A, GS1K-LTP, S1K-13-F, or US1K-13-F.

Q: What does "Fast Recovery ≤ 500ns" mean for circuit performance?

A: Recovery time (trr) defines the interval required for diode current to cease after reverse bias application. Fast recovery (≤500ns) enables higher switching frequencies and reduces switching losses. Standard recovery (>500ns) is suitable for lower frequency applications. Match recovery speed to your circuit's operating frequency and switching requirements.

Q: Can I use S1K from YAGEO as a substitute?

A: S1K (YAGEO) meets voltage and current ratings but lacks complete electrical specification data in available documentation. Reverse recovery time, reverse leakage current, and operating temperature range are not specified. Use only when complete datasheet verification confirms compatibility with CFRA106-G specifications.

Q: Which substitute offers the best thermal performance?

A: RGF1K-E3/67A and GF1K-E3/67A (Vishay SUPERECTIFIER® series) support extended operating temperature range to 175°C versus 150°C for CFRA106-G. This permits operation in higher ambient temperature environments. Both are Active status with ROHS3 compliance.

Q: How do I verify package compatibility before substitution?

A: Obtain the PCB footprint specification for CFRA106-G (DO-214AC/SMA). Compare against substitute part package dimensions in manufacturer datasheets. DO-214AC and DO-214BA packages have different lead spacing and orientation. Physical verification on test board is recommended before production implementation.

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