S1MWF-7 Equivalent & Substitute Parts

Part Overview

The S1MWF-7 is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 1 A average rectified current in a surface mount SOD-123F package, manufactured by Diodes Incorporated. This part is classified as Obsolete, indicating it is no longer in active production. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1000 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Reverse Recovery Time (trr)	3 µs
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Capacitance @ Vr, F	7 pF @ 4V, 1MHz
Package / Case	SOD-123F
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the S1MWF-7 is determined by electrical and mechanical parameter equivalence within the following criteria:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 1 A
Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
Package / Case: SOD-123F (or SOD-123FL, which is mechanically compatible)
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum

Secondary Parameters Affecting Compatibility:

Reverse Recovery Time (trr): Acceptable range 1 µs to 3 µs
Current - Reverse Leakage @ Vr: Acceptable range 1 µA to 10 µA @ 1000 V
Capacitance @ Vr, F: Acceptable range 4 pF to 10 pF @ 4V, 1MHz

All identified substitute parts meet or exceed the critical electrical and mechanical parameters of the S1MWF-7. Variations in secondary parameters remain within acceptable operational limits for general-purpose rectification applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Reverse Leakage @ Vr	Capacitance @ Vr, F	Package	Product Status
S1MWF-7	Diodes Incorporated	1000 V	1 A	1.1 V @ 1 A	3 µs	5 µA @ 1000 V	7 pF @ 4V, 1MHz	SOD-123F	Obsolete
S1MWFM-7	Diodes Incorporated	1000 V	1 A	1.1 V @ 1 A	3 µs	5 µA @ 1000 V	4 pF @ 4V, 1MHz	SOD-123F	Active
S1MSWFQ-7	Diodes Incorporated	1000 V	1 A	1.1 V @ 1 A	1 µs	10 µA @ 1000 V	6 pF @ 4V, 1MHz	SOD-123F	Active
GS1010FL_R1_00001	Panjit International Inc.	1000 V	1 A	1.1 V @ 1 A	Not specified	1 µA @ 1000 V	4 pF @ 4V, 1MHz	SOD-123FL	Active
ACGRMS4007-HF	Comchip Technology	1000 V	1 A	1.1 V @ 1 A	Not specified	10 µA @ 1000 V	10 pF @ 4V, 1MHz	SOD-123F	Active
NRVS1MFL	onsemi	1000 V	1 A	1.1 V @ 1 A	2 µs	1 µA @ 1000 V	4 pF @ 4V, 1MHz	SOD-123F	Not For New Designs

Engineering Selection Recommendations

Primary Recommendation: S1MWFM-7

The S1MWFM-7 from Diodes Incorporated is the direct parametric equivalent to the S1MWF-7. It maintains identical electrical specifications including reverse recovery time (3 µs) and reverse leakage current (5 µA @ 1000 V). The part is in Active product status, ensuring long-term availability. It carries AEC-Q101 automotive qualification and ROHS3 compliance. This part is available in Tape & Reel packaging with 3249 pieces in stock.

Secondary Recommendation: S1MSWFQ-7

The S1MSWFQ-7 from Diodes Incorporated is an Active parametric equivalent with improved reverse recovery time (1 µs versus 3 µs). This faster recovery characteristic may provide performance benefits in switching applications. The part is AEC-Q101 qualified and ROHS3 compliant. It is available in Tape & Reel packaging with 1447 pieces in stock.

Alternative Recommendation: GS1010FL_R1_00001

The GS1010FL_R1_00001 from Panjit International Inc. is an Active manufacturer-recommended substitute. It meets all critical electrical parameters and is available in the mechanically compatible SOD-123FL package variant. This part exhibits superior reverse leakage characteristics (1 µA @ 1000 V) and is ROHS3 compliant. Inventory availability is substantial at 365400 pieces.

Supplementary Options: ACGRMS4007-HF and NRVS1MFL

The ACGRMS4007-HF from Comchip Technology is an Active parametric equivalent with AEC-Q101 qualification. The NRVS1MFL from onsemi is classified as Not For New Designs and should be considered only for legacy system support or maintenance applications where existing inventory exists.

Frequently Asked Questions (FAQ)

Q: Can S1MWFM-7 be used as a direct replacement for S1MWF-7?

A: Yes. The S1MWFM-7 is a parametric equivalent with identical voltage, current, forward voltage, and reverse leakage specifications. Both parts are rated for 1000 V, 1 A, and operate across the same temperature range. The primary difference is product status: S1MWFM-7 is Active while S1MWF-7 is Obsolete.

Q: What is the difference between SOD-123F and SOD-123FL packages?

A: Both packages are mechanically compatible surface mount packages for this diode category. SOD-123FL is a variant designation used by certain manufacturers. The GS1010FL_R1_00001 uses the SOD-123FL designation but maintains mechanical compatibility with SOD-123F footprints.

Q: Does faster reverse recovery time (trr) affect circuit performance?

A: Reverse recovery time is a specified parameter provided in the component data. The S1MSWFQ-7 has a trr of 1 µs compared to 3 µs for the S1MWF-7. Selection between these parts should be based on circuit requirements and application specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 Compliant status, matching the compliance level of the S1MWF-7.

Q: Why is NRVS1MFL listed as "Not For New Designs"?

A: The NRVS1MFL carries a "Not For New Designs" product status designation from onsemi. This classification indicates the manufacturer recommends against using this part in new circuit designs. It remains available for legacy system support and maintenance applications.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive qualification standard. Parts carrying this qualification have undergone testing and validation for automotive applications. S1MWFM-7, S1MSWFQ-7, ACGRMS4007-HF, and NRVS1MFL all carry AEC-Q101 qualification.

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

A: Both GS1010FL_R1_00001 and NRVS1MFL exhibit reverse leakage current of 1 µA @ 1000 V, compared to 5 µA for the S1MWF-7 and 10 µA for S1MSWFQ-7 and ACGRMS4007-HF.

Q: Is inventory availability a factor in part selection?

A: Inventory levels are provided for reference. GS1010FL_R1_00001 has the highest inventory at 365400 pieces. S1MWFM-7 has 3249 pieces, S1MSWFQ-7 has 1447 pieces, NRVS1MFL has 7768 pieces, and ACGRMS4007-HF has 750 pieces available.

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