CFRC307-G Equivalent & Substitute Parts Reference

Part Overview

The CFRC307-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 1000 V DC reverse voltage and 3 A average rectified current in a Surface Mount DO-214AB (SMC) package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction (Max)	150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the CFRC307-G are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V minimum
Current - Average Rectified (Io): 3 A minimum
Package / Case: DO-214AB or SMC equivalent
Mounting Type: Surface Mount
Operating Temperature - Junction: Compatible with application requirements

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max): Acceptable range 1.0 V to 1.7 V @ rated current
Speed Classification: Fast Recovery or Standard Recovery acceptable
Reverse Recovery Time (trr): Acceptable range 75 ns to 2.5 µs
Current - Reverse Leakage @ Vr: Acceptable range 5 µA to 10 µA @ 1000 V
RoHS Status: ROHS3 Compliant or equivalent environmental compliance
Moisture Sensitivity Level (MSL): 1 (Unlimited) preferred

Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria with minimal parameter variation) and Functional Equivalents (meeting all primary criteria with acceptable secondary parameter differences).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	trr [ns/µs]	Ir @ Vr [µA]	Package	Tj (Max) [°C]	RoHS Status
CFRC307-G	Comchip Technology	1000	3	1.3 @ 3A	Fast Recovery ≤ 500ns	500	5 @ 1000V	DO-214AB (SMC)	150	ROHS3
RS3M-13-F	Diodes Incorporated	1000	3	1.3 @ 3A	Fast Recovery ≤ 500ns	500	5 @ 1000V	DO-214AB (SMC)	150	ROHS3
S3M-13-F	Diodes Incorporated	1000	3	1.15 @ 3A	Standard Recovery >500ns	—	10 @ 1000V	DO-214AB (SMC)	150	ROHS3
S3M	Diotec Semiconductor	1000	3	1.15 @ 3A	Standard Recovery >500ns	1500	5 @ 1000V	DO-214AB (SMC)	150	Not applicable
S3M-E3/57T	Vishay General Semiconductor - Diodes Division	1000	3	1.15 @ 2.5A	Standard Recovery >500ns	2500	10 @ 1000V	DO-214AB (SMC)	150	ROHS3
S3M-E3/9AT	Vishay General Semiconductor - Diodes Division	1000	3	1.15 @ 2.5A	Standard Recovery >500ns	2500	10 @ 1000V	DO-214AB (SMC)	150	ROHS3
SMLJ60S10-TP	Micro Commercial Co	1000	6	1.0 @ 6A	Standard Recovery >500ns	—	5 @ 1000V	DO-214AB (SMC)	150	ROHS3
STTH310S	STMicroelectronics	1000	3	1.7 @ 3A	Fast Recovery ≤ 500ns	75	10 @ 1000V	DO-214AB (SMC)	175	ROHS3

Engineering Selection Recommendations

Direct Equivalent (Highest Compatibility):

RS3M-13-F (Diodes Incorporated) provides the closest electrical match to CFRC307-G, with identical voltage rating (1000 V), current rating (3 A), forward voltage (1.3 V @ 3 A), recovery speed classification (Fast Recovery ≤ 500ns), and reverse recovery time (500 ns). Both components are RoHS3 compliant with MSL 1 (Unlimited) and REACH Unaffected status. This part is recommended as the primary substitute when CFRC307-G is unavailable.

Functional Equivalents (Acceptable Substitution):

S3M-13-F, S3M-E3/57T, and S3M-E3/9AT meet all primary substitution criteria (1000 V, 3 A, DO-214AB package, Surface Mount) with acceptable secondary parameter variations. These parts feature Standard Recovery classification (>500ns) instead of Fast Recovery, resulting in longer reverse recovery times (1.5 µs to 2.5 µs). Forward voltage is reduced to 1.15 V @ 2.5 A to 3 A, and reverse leakage current is 10 µA @ 1000 V. All three are RoHS3 compliant. These substitutes are suitable for applications where recovery speed is not performance-critical.

S3M (Diotec Semiconductor) qualifies as a functional equivalent with identical electrical ratings to S3M-13-F. However, RoHS status is listed as "Not applicable," which may require verification for compliance-sensitive applications.

Higher Current Rating Alternative:

SMLJ60S10-TP (Micro Commercial Co) provides 6 A average rectified current at 1000 V, exceeding the 3 A requirement of CFRC307-G. This part is suitable for applications requiring higher current capacity within the same voltage class and package form factor. Forward voltage is 1.0 V @ 6 A, and reverse leakage is 5 µA @ 1000 V. RoHS3 compliant.

Fast Recovery Alternative with Extended Temperature Range:

STTH310S (STMicroelectronics) maintains Fast Recovery classification (≤ 500ns) with the fastest reverse recovery time (75 ns) among all substitutes. Operating temperature range extends to 175°C (versus 150°C for CFRC307-G). Forward voltage is higher at 1.7 V @ 3 A, and reverse leakage is 10 µA @ 1000 V. RoHS3 compliant. This part is recommended for high-speed switching applications or environments requiring extended temperature operation.

All recommended substitutes are Active product status with confirmed inventory availability and standard environmental compliance certifications.

Frequently Asked Questions (FAQ)

Q1: Can RS3M-13-F directly replace CFRC307-G without circuit modification?

A: Yes. RS3M-13-F is electrically and mechanically identical to CFRC307-G across all specified parameters: 1000 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage @ 3 A, Fast Recovery ≤ 500ns classification, 500 ns reverse recovery time, and DO-214AB (SMC) package. Both are RoHS3 compliant with MSL 1 (Unlimited). No circuit modification is required.

Q2: What is the difference between Fast Recovery and Standard Recovery classifications?

A: Fast Recovery diodes have reverse recovery time ≤ 500 ns, while Standard Recovery diodes exceed 500 ns. CFRC307-G and RS3M-13-F are Fast Recovery devices (500 ns). S3M-13-F, S3M-E3/57T, and S3M-E3/9AT are Standard Recovery devices (1.5 µs to 2.5 µs). Fast Recovery is preferred in high-frequency switching applications; Standard Recovery is acceptable in lower-frequency or linear applications.

Q3: Can SMLJ60S10-TP be used in place of CFRC307-G?

A: SMLJ60S10-TP is functionally compatible but rated for 6 A instead of 3 A. It meets the 1000 V voltage requirement and uses the same DO-214AB (SMC) package. The higher current rating provides design margin but does not prevent substitution. Forward voltage is lower (1.0 V @ 6 A), which may reduce power dissipation. Verify that the circuit design accommodates the different forward voltage characteristic.

Q4: Is STTH310S suitable for high-temperature applications?

A: STTH310S has a maximum junction temperature of 175°C, compared to 150°C for CFRC307-G. This 25°C margin makes STTH310S suitable for applications with elevated ambient temperatures or high power dissipation. However, forward voltage is higher (1.7 V @ 3 A), resulting in increased power loss. Thermal analysis is recommended before selection.

Q5: What does RoHS3 compliance mean for component substitution?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the component meets EU environmental standards restricting lead, cadmium, mercury, and other hazardous materials. All recommended substitutes except S3M are explicitly RoHS3 compliant. For applications requiring regulatory compliance, select only RoHS3-certified parts.

Q6: Are there package compatibility concerns between DO-214AB and SMC designations?

A: DO-214AB and SMC refer to the same physical package form factor. Both designations are used interchangeably in the industry. All substitute parts listed use DO-214AB (SMC) packaging and are mechanically compatible with CFRC307-G footprints.

Q7: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has no moisture sensitivity restrictions and does not require special handling, storage, or baking procedures prior to soldering. All recommended substitutes carry MSL 1 (Unlimited) or equivalent ratings, ensuring consistent manufacturing and assembly processes.

Q8: How do reverse leakage current differences affect circuit performance?

A: CFRC307-G and SMLJ60S10-TP specify 5 µA @ 1000 V reverse leakage, while S3M-13-F, S3M-E3/57T, S3M-E3/9AT, and STTH310S specify 10 µA @ 1000 V. This 5 µA difference is negligible in most applications. In high-impedance circuits or precision analog applications, verify that the higher leakage current does not exceed circuit requirements.

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