S07B-M-18 Equivalent & Substitute Parts

Part Overview

The S07B-M-18 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode is rated for 100 V DC reverse voltage with 700 mA average rectified current in a DO-219AB (SMF) package. The part is currently active and carries AEC-Q101 automotive qualification. Substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required, or when design specifications permit higher current ratings or different package geometries.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	700	mA
Voltage - Forward (Vf) (Max) @ If	1.1 @ 1 A	V
Reverse Recovery Time (trr)	1.8	µs
Current - Reverse Leakage @ Vr	10	µA @ 100 V
Package / Case	DO-219AB	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
AEC-Q101 Qualification	Yes	-

Substitute Part Grouping Explanation

Substitution of the S07B-M-18 is determined by the following critical parameters: reverse voltage rating (100 V minimum), average rectified current capacity, forward voltage characteristics, package type, and surface mount compatibility. The substitute parts are grouped into two categories based on electrical and mechanical compatibility:

Category 1: Parametric Equivalents (Identical Electrical and Package Specifications) These parts maintain the same 100 V reverse voltage, 700 mA current rating, DO-219AB package, and surface mount configuration. Differences exist only in packaging format (Tape & Reel versus Cut Tape) and inventory availability.

Category 2: Manufacturer Recommended Alternatives (Higher Current Rating, Different Package) These parts maintain the 100 V reverse voltage and forward voltage characteristics but feature higher current ratings (1 A) and different package geometries (SOD-123FL). These parts are suitable for designs where the increased current capacity and alternative package form factor are acceptable.

Parameter Comparison

Parameter	S07B-M-18	S1FLB-GS08	S1FLB-M-08	SM4002PL-TP	UFM12PL-TP
Manufacturer	Vishay	Vishay	Vishay	Micro Commercial Co	Micro Commercial Co
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	700 mA	700 mA	700 mA	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A	1 V @ 1 A
Speed	Standard Recovery >500ns	Standard Recovery >500ns	Standard Recovery >500ns	Standard Recovery >500ns	Fast Recovery ≤500ns
Reverse Recovery Time (trr)	1.8 µs	1.8 µs	1.8 µs	Not specified	35 ns
Current - Reverse Leakage @ Vr	10 µA @ 100 V	10 µA @ 100 V	10 µA @ 100 V	5 µA @ 100 V	10 µA @ 100 V
Package / Case	DO-219AB	DO-219AB	DO-219AB	SOD-123F	SOD-123F
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-55 to 150°C	-65 to 175°C	-65 to 150°C
Product Status	Active	Active	Active	Not For New Designs	Not For New Designs
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)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): The S1FLB-M-08 is the primary parametric equivalent to the S07B-M-18. Both parts maintain identical electrical characteristics (100 V reverse voltage, 700 mA current rating, 1.1 V forward voltage, 1.8 µs reverse recovery time) and the same DO-219AB package. The S1FLB-M-08 is currently active and carries higher inventory availability (18,051 pieces). This part is suitable for direct substitution in all applications where the S07B-M-18 is specified.

The S1FLB-GS08 is an alternative parametric equivalent available in Cut Tape and Digi-Reel packaging formats. This part maintains identical electrical specifications and DO-219AB package geometry but differs only in packaging presentation. Selection between S1FLB-M-08 and S1FLB-GS08 depends on procurement and assembly requirements.

For Applications Permitting Higher Current Ratings: The SM4002PL-TP and UFM12PL-TP are manufacturer-recommended alternatives suitable for designs where 1 A current capacity is acceptable and SOD-123FL package geometry is compatible with board layout. Both parts maintain the 100 V reverse voltage rating and forward voltage characteristics of the primary part. However, both parts carry "Not For New Designs" status and should be used only when existing designs require substitution or when new designs specifically require the SOD-123FL package form factor.

The UFM12PL-TP features fast recovery characteristics (35 ns reverse recovery time) compared to the standard recovery profile of the S07B-M-18. This faster recovery characteristic may introduce different switching behavior in rectification circuits and should be evaluated for circuit compatibility.

Frequently Asked Questions (FAQ)

Q: Can the S1FLB-M-08 be used as a direct replacement for the S07B-M-18? A: Yes. The S1FLB-M-08 maintains identical electrical specifications (100 V reverse voltage, 700 mA current rating, 1.1 V forward voltage, 1.8 µs reverse recovery time) and the same DO-219AB surface mount package. Both parts are currently active products with ROHS3 compliance and unlimited moisture sensitivity level.

Q: What is the difference between S1FLB-M-08 and S1FLB-GS08? A: Both parts are parametric equivalents with identical electrical and package specifications. The difference is packaging format: S1FLB-M-08 is supplied in Tape & Reel format, while S1FLB-GS08 is available in Cut Tape and Digi-Reel formats. Selection depends on assembly equipment compatibility and procurement preferences.

Q: Can SM4002PL-TP or UFM12PL-TP replace the S07B-M-18 in all applications? A: These parts are suitable only for applications where the higher 1 A current rating and SOD-123FL package geometry are compatible with circuit design and board layout. Both parts maintain the 100 V reverse voltage and forward voltage characteristics but feature different package form factors. Additionally, both parts carry "Not For New Designs" status and should be used only for existing design substitution or when the alternative package is specifically required.

Q: What is the significance of the "Not For New Designs" status on SM4002PL-TP and UFM12PL-TP? A: This status indicates that these parts are available for existing designs but should not be selected for new product development. For new designs, the S1FLB-M-08 or S1FLB-GS08 are the recommended choices as they maintain active product status.

Q: Does UFM12PL-TP have different switching characteristics than the S07B-M-18? A: Yes. The UFM12PL-TP features fast recovery characteristics with 35 ns reverse recovery time, compared to the 1.8 µs standard recovery time of the S07B-M-18. This difference affects switching speed in rectification circuits and requires circuit evaluation for compatibility.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts (S1FLB-GS08, S1FLB-M-08, SM4002PL-TP, and UFM12PL-TP) are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the compliance profile of the S07B-M-18.

Q: What is the primary difference between the S07B-M-18 and the Micro Commercial Co alternatives? A: The primary differences are manufacturer, current rating (700 mA versus 1 A), and package geometry (DO-219AB versus SOD-123FL). The Micro Commercial Co parts also carry "Not For New Designs" status, indicating they are available for existing design substitution only.

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