RS1ML Fast Recovery Rectifier Diode Equivalent & Substitute Parts

Part Overview

The RS1ML is a fast recovery rectifier diode manufactured by SMC Diode Solutions, rated for 1000V DC reverse voltage and 1A average rectified current in a surface mount SOD-123FL package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical performance characteristics, package compatibility, and operational parameters. Alternative sources become necessary for supply chain continuity, inventory availability, or specific application requirements such as automotive qualification.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1 A	V
Reverse Recovery Time (trr)	500	ns
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	SOD-123F / SOD-123FL	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the RS1ML are qualified based on the following electrical and mechanical parameters:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1 A
Reverse Recovery Time (trr): 500 ns
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Package Compatibility: Substitutes are available in SOD-123F and SOD-123FL packages, both compatible with surface mount assembly processes.

Secondary Considerations: Current - Reverse Leakage @ Vr and Capacitance @ Vr, F vary within acceptable ranges across substitute parts. All substitute parts maintain the same core electrical performance envelope and thermal operating range.

Parameter Comparison

Parameter	RS1ML (SMC)	RS1010FL_R1_00001 (Panjit)	RS1MSWFM-7 (Diodes Inc.)	RS1MSWFMQ-7 (Diodes Inc.)	RS1MWF-7 (Diodes Inc.)
Manufacturer	SMC Diode Solutions	Panjit International Inc.	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A
Reverse Recovery Time (trr)	500 ns	500 ns	500 ns	500 ns	500 ns
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	1 µA @ 1000 V	10 µA @ 1000 V	10 µA @ 1000 V	5 µA @ 1000 V
Capacitance @ Vr, F	10 pF @ 4V, 1MHz	9 pF @ 4V, 1MHz	4.7 pF @ 4V, 1MHz	4.7 pF @ 4V, 1MHz	8 pF @ 1V, 1MHz
Package / Case	SOD-123F	SOD-123F	SOD-123F	SOD-123F	SOD-123F
Supplier Device Package	SOD-123FL	SOD-123FL	SOD-123F	SOD-123F	SOD-123F
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 150 °C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Grade / Qualification	—	—	Automotive / AEC-Q101	Automotive / AEC-Q101	—
Product Status	Active	Active	Active	Active	Active
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All substitute parts listed maintain electrical equivalence to the RS1ML across the critical parameters of reverse voltage, forward current, forward voltage drop, and reverse recovery time. Selection among substitutes is determined by specific application requirements and regulatory compliance:

RS1010FL_R1_00001 (Panjit International Inc.): Active product status with ROHS3 compliance and REACH Unaffected designation. This part exhibits lower reverse leakage current (1 µA) compared to the RS1ML (5 µA), making it suitable for applications requiring minimal leakage performance. Capacitance specification is 9 pF at 4V, 1MHz.

RS1MSWFM-7 (Diodes Incorporated): Active product status with ROHS3 compliance, REACH Unaffected designation, and automotive grade qualification per AEC-Q101. This part is suitable for automotive applications requiring formal qualification documentation. Reverse leakage current is 10 µA and capacitance is 4.7 pF at 4V, 1MHz.

RS1MSWFMQ-7 (Diodes Incorporated): Active product status with ROHS3 compliance, REACH Unaffected designation, and automotive grade qualification per AEC-Q101. Specifications are identical to RS1MSWFM-7, with 10 µA reverse leakage current and 4.7 pF capacitance at 4V, 1MHz. This variant is suitable for automotive applications.

RS1MWF-7 (Diodes Incorporated): Active product status with ROHS3 compliance and REACH Unaffected designation. This part exhibits reverse leakage current of 5 µA, matching the RS1ML specification. Capacitance is specified at 8 pF at 1V, 1MHz. No automotive qualification is listed.

Frequently Asked Questions (FAQ)

Q: Can RS1010FL_R1_00001 be used as a direct replacement for RS1ML?

A: Yes. Both parts share identical electrical specifications for voltage rating (1000 V), current rating (1 A), forward voltage (1.3 V @ 1 A), and reverse recovery time (500 ns). Both are surface mount SOD-123F package devices with identical thermal operating range (-55°C to 150°C) and RoHS3 compliance. The RS1010FL_R1_00001 exhibits lower reverse leakage current (1 µA versus 5 µA), which is a performance advantage in most applications.

Q: What is the difference between RS1MSWFM-7 and RS1MSWFMQ-7?

A: Both parts are manufactured by Diodes Incorporated and share identical electrical specifications. The primary distinction is that RS1MSWFMQ-7 carries automotive grade qualification per AEC-Q101, while RS1MSWFM-7 does not. Both are suitable for general-purpose applications; automotive applications should specify RS1MSWFMQ-7 if AEC-Q101 qualification is required.

Q: Are all substitute parts available in the same package?

A: All substitute parts are surface mount devices in the SOD-123F package family. RS1ML and RS1010FL_R1_00001 are supplied in SOD-123FL variant, while RS1MSWFM-7, RS1MSWFMQ-7, and RS1MWF-7 are supplied in SOD-123F variant. Both variants are mechanically and electrically compatible for surface mount assembly.

Q: Which substitute part has the lowest reverse leakage current?

A: RS1010FL_R1_00001 (Panjit International Inc.) specifies 1 µA reverse leakage current at 1000 V, which is lower than the RS1ML specification of 5 µA. This part is suitable for applications where minimizing leakage current is a design requirement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant designation, matching the RS1ML compliance status.

Q: What is the REACH status difference between RS1ML and the substitute parts?

A: RS1ML is designated as REACH Affected. All substitute parts (RS1010FL_R1_00001, RS1MSWFM-7, RS1MSWFMQ-7, and RS1MWF-7) are designated as REACH Unaffected. Applications subject to REACH regulatory requirements should consider this distinction during component selection.

Q: Can RS1MWF-7 be used in automotive applications?

A: RS1MWF-7 is not listed with automotive grade or AEC-Q101 qualification. For automotive applications requiring formal qualification documentation, RS1MSWFM-7 or RS1MSWFMQ-7 are the appropriate selections.

Q: What is the difference in capacitance specifications across substitute parts?

A: Capacitance specifications vary: RS1ML (10 pF @ 4V, 1MHz), RS1010FL_R1_00001 (9 pF @ 4V, 1MHz), RS1MSWFM-7 and RS1MSWFMQ-7 (4.7 pF @ 4V, 1MHz), and RS1MWF-7 (8 pF @ 1V, 1MHz). These variations are within acceptable ranges for fast recovery rectifier applications and do not affect functional equivalence for standard circuit applications.

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