RS3M R7G Equivalent & Substitute Parts

Part Overview

The RS3M R7G is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. Manufactured by Taiwan Semiconductor Corporation, this component is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Reverse Recovery Time (trr)	500 ns
Current - Reverse Leakage @ Vr	10 µA @ 1000 V
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RS3M R7G is determined by the following critical electrical and mechanical parameters:

Voltage Rating: All substitute parts must maintain a maximum DC reverse voltage (Vr) of 1000 V or greater to ensure equivalent or superior voltage withstand capability.

Current Rating: All substitute parts must support an average rectified current (Io) of 3 A or greater. Parts rated for higher current (5 A) are acceptable as they provide design margin.

Package Compatibility: Primary substitutes maintain the DO-214AB (SMC) surface mount package for direct board-level compatibility. Secondary substitutes in DO-214AA (SMB) package are listed for applications where package footprint differences are acceptable.

Recovery Characteristics: The RS3M R7G specifies fast recovery (≤ 500 ns). Substitute parts are grouped into two categories: fast recovery (≤ 500 ns) and standard recovery (> 500 ns). Fast recovery substitutes provide identical switching performance; standard recovery substitutes are acceptable where switching speed is not a limiting design constraint.

Temperature Range: Operating junction temperature range of -55°C to 150°C is maintained across all primary substitutes.

Compliance: All substitute parts are ROHS3 compliant and REACH unaffected, matching the original part's regulatory status.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	trr	Ir @ Vr	Package	Tj (Operating)	Product Status
RS3M R7G	Taiwan Semiconductor Corporation	1000 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	500 ns	10 µA @ 1000 V	DO-214AB (SMC)	-55°C ~ 150°C	Discontinued
S3M-TP	Micro Commercial Co	1000 V	3 A	1.2 V @ 3 A	Standard Recovery > 500 ns	—	10 µA @ 1000 V	DO-214AB (SMC)	-55°C ~ 150°C	Active
CFRC307-G	Comchip Technology	1000 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	500 ns	5 µA @ 1000 V	DO-214AB (SMC)	-55°C ~ 150°C	Active
RS3M-13-F	Diodes Incorporated	1000 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	500 ns	5 µA @ 1000 V	DO-214AB (SMC)	-65°C ~ 150°C	Active
RS3MB-13-F	Diodes Incorporated	1000 V	3 A	1.3 V @ 3 A	Fast Recovery ≤ 500 ns	500 ns	5 µA @ 1000 V	DO-214AA (SMB)	-65°C ~ 150°C	Active
S3M-13-F	Diodes Incorporated	1000 V	3 A	1.15 V @ 3 A	Standard Recovery > 500 ns	—	10 µA @ 1000 V	DO-214AB (SMC)	-65°C ~ 150°C	Active
S3M-M3/57T	Vishay General Semiconductor - Diodes Division	1000 V	3 A	1.15 V @ 2.5 A	Standard Recovery > 500 ns	2.5 µs	10 µA @ 1000 V	DO-214AB (SMC)	-55°C ~ 150°C	Active
S3MB-13-F	Diodes Incorporated	1000 V	3 A	1.15 V @ 3 A	Standard Recovery > 500 ns	—	10 µA @ 1000 V	DO-214AA (SMB)	-65°C ~ 150°C	Active
S3MHE3_A/H	Vishay General Semiconductor - Diodes Division	1000 V	3 A	1.15 V @ 2.5 A	Standard Recovery > 500 ns	2.5 µs	10 µA @ 1000 V	DO-214AB (SMC)	-55°C ~ 150°C	Active
S3MHE3_A/I	Vishay General Semiconductor - Diodes Division	1000 V	3 A	1.15 V @ 2.5 A	Standard Recovery > 500 ns	2.5 µs	10 µA @ 1000 V	DO-214AB (SMC)	-55°C ~ 150°C	Active
CGRC507-G	Comchip Technology	1000 V	5 A	1.15 V @ 5 A	Standard Recovery > 500 ns	—	10 µA @ 1000 V	DO-214AB (SMC)	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Replacement (DO-214AB SMC Package, Fast Recovery):

CFRC307-G and RS3M-13-F are direct electrical and mechanical equivalents to the RS3M R7G. Both parts maintain 1000 V reverse voltage, 3 A current rating, fast recovery characteristics (≤ 500 ns), and identical DO-214AB (SMC) package geometry. CFRC307-G is manufactured by Comchip Technology with 864 units in stock. RS3M-13-F is manufactured by Diodes Incorporated with 80,400 units in stock and extended operating temperature range (-65°C to 150°C). Both parts are active products with ROHS3 compliance.

Alternative Replacement (DO-214AB SMC Package, Standard Recovery):

S3M-13-F, S3M-M3/57T, S3MHE3_A/H, and S3MHE3_A/I provide electrical equivalence with standard recovery characteristics (> 500 ns). These parts are suitable for applications where switching speed is not a critical design parameter. S3M-13-F (Diodes Incorporated, 15,100 units in stock) and S3M-M3/57T (Vishay, 652 units in stock) maintain the -55°C to 150°C operating range. S3MHE3_A/H and S3MHE3_A/I (Vishay, 21,650 and 5,600 units respectively) include automotive-grade qualification (AEC-Q101).

Package Variant Replacement (DO-214AA SMB Package):

RS3MB-13-F and S3MB-13-F are functionally equivalent to the RS3M R7G but utilize the DO-214AA (SMB) surface mount package instead of DO-214AB (SMC). These parts are suitable for designs where SMB package footprint is acceptable. RS3MB-13-F provides fast recovery (≤ 500 ns) with 10,300 units in stock. S3MB-13-F provides standard recovery with 155,200 units in stock. Both are manufactured by Diodes Incorporated with extended temperature range (-65°C to 150°C).

Higher Current Rating (DO-214AB SMC Package):

CGRC507-G (Comchip Technology, 978 units in stock) provides 5 A current rating with 1000 V reverse voltage in the DO-214AB (SMC) package. This part is suitable for applications requiring design margin above the 3 A specification.

Standard Recovery Alternative (DO-214AB SMC Package):

S3M-TP (Micro Commercial Co, 321,300 units in stock) provides standard recovery characteristics with identical voltage and current ratings in the DO-214AB (SMC) package. This part offers the highest inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher current rating than the original RS3M R7G?

A: Yes. CGRC507-G is rated for 5 A average rectified current compared to the RS3M R7G's 3 A rating. Higher current rating provides design margin and is electrically compatible in applications requiring 3 A or less.

Q: What is the difference between fast recovery and standard recovery diodes?

A: The RS3M R7G specifies fast recovery with reverse recovery time (trr) of 500 ns or less. Standard recovery substitutes have trr greater than 500 ns. Fast recovery diodes switch more quickly, reducing switching losses in high-frequency applications. Standard recovery diodes are acceptable in applications where switching speed is not a limiting design constraint.

Q: Can I substitute the DO-214AB (SMC) package with DO-214AA (SMB) package?

A: Package substitution requires board-level design review. RS3MB-13-F and S3MB-13-F provide electrical equivalence in the DO-214AA (SMB) package. SMB packages have different footprint dimensions than SMC packages. Direct board-level substitution is not possible without PCB modification.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the original RS3M R7G regulatory status.

Q: Which substitute part has the best inventory availability?

A: S3M-TP (Micro Commercial Co) has the highest inventory with 321,300 units in stock. S3MB-13-F (Diodes Incorporated) has 155,200 units in stock. RS3M-13-F (Diodes Incorporated) has 80,400 units in stock.

Q: Do any substitute parts include automotive qualification?

A: Yes. S3MHE3_A/H and S3MHE3_A/I (Vishay General Semiconductor - Diodes Division) include AEC-Q101 automotive qualification. These parts are suitable for automotive applications requiring qualified component status.

Q: What is the difference between forward voltage specifications at different current levels?

A: Forward voltage (Vf) varies with applied current (If). The RS3M R7G specifies 1.3 V @ 3 A. Some substitutes specify Vf @ 2.5 A (S3M-M3/57T, S3MHE3_A/H, S3MHE3_A/I) or @ 5 A (CGRC507-G). Forward voltage increases with current; specifications at lower current levels indicate lower voltage drop at reduced current.

Q: Can I use S3M-TP as a direct replacement for the RS3M R7G?

A: S3M-TP provides electrical equivalence with identical voltage and current ratings in the same DO-214AB (SMC) package. The primary difference is standard recovery (> 500 ns) versus fast recovery (≤ 500 ns). S3M-TP is suitable for applications where switching speed is not a critical design parameter. S3M-TP has the highest inventory availability (321,300 units).

Q: What is reverse leakage current and why does it vary among substitutes?

A: Reverse leakage current (Ir) is the small current flowing through the diode when reverse biased. The RS3M R7G specifies 10 µA @ 1000 V. CFRC307-G and RS3M-13-F specify 5 µA @ 1000 V, indicating lower leakage. Lower reverse leakage reduces power dissipation in reverse bias conditions and is generally beneficial for circuit performance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message