RSFJL M2G Equivalent & Substitute Parts

Part Overview

The RSFJL M2G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600V DC reverse voltage and 500mA average rectified current in a surface mount Sub SMA package (DO-219AB). This component is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts become necessary when the RSFJL M2G reaches end-of-life status, experiences supply constraints, or when design requirements necessitate alternative electrical characteristics such as higher current ratings or improved reverse recovery performance. The parts listed below provide functional equivalence or enhanced performance within the same package family.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	500	mA
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA	V
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Package / Case	DO-219AB	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the RSFJL M2G is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 600V
Package / Case: Must be DO-219AB (Sub SMA)
Mounting Type: Must be Surface Mount
RoHS Status: Must maintain ROHS3 compliance

Secondary Compatibility Factors:

Current - Average Rectified (Io): Equal or higher ratings are acceptable
Voltage - Forward (Vf): Lower or equal values preferred for efficiency
Reverse Recovery Time (trr): Lower values indicate improved performance
Operating Temperature Range: Must accommodate application requirements

Parametric Equivalent Parts maintain identical electrical specifications and are direct replacements within the same product family (RSFJL series variants).

Similar Parts from alternative manufacturers (Vishay FRED Pt® series) provide enhanced performance characteristics while maintaining package compatibility and voltage/current ratings suitable for applications requiring the RSFJL M2G.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA/A]	Vf (Max) [V]	trr [ns]	Ir @ Vr [µA]	Package	Product Status
RSFJL M2G	Taiwan Semiconductor	600	500mA	1.3 @ 500mA	250	5 @ 600V	DO-219AB	Active
RSFJL	Taiwan Semiconductor	600	500mA	1.3 @ 500mA	500	5 @ 600V	DO-219AB	Not For New Designs
RSFJL R3G	Taiwan Semiconductor	600	500mA	1.3 @ 500mA	250	5 @ 600V	DO-219AB	Discontinued at DiGi Electronics
VS-1EFU06HM3/I	Vishay General Semiconductor	600	1A	1.2 @ 1A	32	3 @ 600V	DO-219AB	Active
VS-2EFU06HM3/I	Vishay General Semiconductor	600	2A	1.35 @ 2A	55	3 @ 600V	DO-219AB	Active

Engineering Selection Recommendations

For Direct Replacement (Active Status): The RSFJL M2G is the primary selection for new designs and ongoing production. This part maintains Active product status with full manufacturer support and unlimited availability through distribution channels.

For Existing Inventory Utilization (Parametric Equivalent): The RSFJL R3G provides identical electrical performance with matching reverse recovery time (250ns) and is suitable for applications where existing stock must be consumed. However, this part is discontinued at DiGi Electronics and should not be selected for new designs.

For Enhanced Performance Requirements: The VS-1EFU06HM3/I and VS-2EFU06HM3/I from Vishay General Semiconductor offer superior reverse recovery characteristics (32ns and 55ns respectively) compared to the RSFJL M2G (250ns). These parts are qualified to AEC-Q101 automotive standards and operate across an extended temperature range (-55°C to 175°C). Selection between these two depends on current requirements: VS-1EFU06HM3/I for 1A applications and VS-2EFU06HM3/I for 2A applications.

Compliance Considerations: All listed parts maintain ROHS3 compliance and REACH unaffected status. The Vishay parts carry automotive-grade qualification (AEC-Q101), providing additional reliability assurance for mission-critical applications.

Avoid Selection: The RSFJL (base part number without revision) exhibits extended reverse recovery time (500ns) and carries "Not For New Designs" status, making it unsuitable for new applications despite adequate voltage and current ratings.

Frequently Asked Questions (FAQ)

Q: Can the RSFJL M2G be replaced with the RSFJL R3G? A: The RSFJL R3G is a parametric equivalent with identical voltage, current, and forward voltage specifications. However, it is discontinued at DiGi Electronics and carries "Discontinued" product status. Use only if existing inventory must be consumed in legacy production runs.

Q: What is the difference between RSFJL M2G and RSFJL (base part)? A: Both parts share identical voltage (600V) and current (500mA) ratings. The primary difference is reverse recovery time: RSFJL M2G operates at 250ns while the base RSFJL operates at 500ns. The base RSFJL carries "Not For New Designs" status and should not be selected for new applications.

Q: Are Vishay VS-1EFU06HM3/I and VS-2EFU06HM3/I suitable replacements for RSFJL M2G? A: Yes, both Vishay parts are suitable replacements. They maintain the same 600V reverse voltage rating and DO-219AB package. The VS-1EFU06HM3/I provides 1A current capacity with 32ns reverse recovery time, while VS-2EFU06HM3/I provides 2A capacity with 55ns recovery time. Both offer superior performance characteristics and active product status with AEC-Q101 automotive qualification.

Q: What does "Not For New Designs" mean for the RSFJL base part? A: This status indicates the manufacturer no longer recommends this part for new circuit designs. While existing inventory may be available, it should only be used for sustaining production of legacy products. New designs should specify RSFJL M2G or alternative active parts.

Q: Can I use a higher current-rated diode as a substitute? A: Yes. The VS-1EFU06HM3/I (1A) and VS-2EFU06HM3/I (2A) both exceed the RSFJL M2G's 500mA rating while maintaining the same 600V reverse voltage and DO-219AB package. Higher current ratings provide design margin and are electrically compatible with applications designed for 500mA operation.

Q: What is the significance of reverse recovery time differences? A: Reverse recovery time (trr) affects switching speed and efficiency. The RSFJL M2G operates at 250ns, while Vishay parts operate at 32ns (VS-1EFU06HM3/I) or 55ns (VS-2EFU06HM3/I). Lower trr values reduce switching losses and electromagnetic interference, beneficial for high-frequency applications. The RSFJL base part at 500ns is slower and less suitable for demanding switching applications.

Q: Are all listed parts RoHS compliant? A: Yes. All parts listed maintain ROHS3 compliance and REACH unaffected status, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the operating temperature difference between RSFJL M2G and Vishay alternatives? A: RSFJL M2G operates from -55°C to 150°C junction temperature. Vishay VS-1EFU06HM3/I and VS-2EFU06HM3/I extend this range to -55°C to 175°C, providing 25°C additional high-temperature margin suitable for automotive and harsh environment applications.

Q: Can I mix RSFJL M2G and Vishay parts in the same circuit? A: Yes. Both part families share identical 600V reverse voltage rating, DO-219AB package, and surface mount configuration. Mixing is acceptable from an electrical and mechanical standpoint, though design documentation should specify the actual part used for traceability and future maintenance.

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