FS1ME-7 Equivalent & Substitute Parts

Part Overview

The FS1ME-7 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 1000 V DC reverse voltage and 1 A average rectified current in a surface mount DO-219AA package. This part is classified as obsolete, indicating it has been discontinued and is no longer in active production. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and ongoing system support.

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)	1.6 µs
Current - Reverse Leakage @ Vr	5 µA @ 1000 V
Capacitance @ Vr, F	7.6 pF @ 4 V, 1 MHz
Package / Case	DO-219AA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Standard
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the FS1ME-7 are qualified based on electrical and mechanical parameter equivalence within the rectifier diode category. The substitution logic is structured as follows:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-219AA
Mounting Type: Surface Mount
Operating Temperature Range: -55°C ~ 150°C
Technology: Standard

Secondary Alignment Parameters:

Voltage - Forward (Vf) (Max) @ If: 1.1 V @ 1 A
Current - Reverse Leakage @ Vr: 5 µA @ 1000 V
Capacitance @ Vr, F: 7.6 pF @ 4 V, 1 MHz
RoHS Status: ROHS3 Compliant

Substitute parts meeting all primary criteria and secondary alignment parameters are classified as direct electrical and mechanical equivalents. Variations in reverse recovery time (trr) within the standard recovery classification do not disqualify substitution when all other parameters align.

Parameter Comparison

Parameter	FS1ME-7	FS1ME_HF	FS1MED-7
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Product Status	Obsolete	Active	Active
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A	1.1 V @ 1 A	1.1 V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	1.6 µs	1.6 µs	1 µs
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	5 µA @ 1000 V	5 µA @ 1000 V
Capacitance @ Vr, F	7.6 pF @ 4 V, 1 MHz	7.6 pF @ 4 V, 1 MHz	7.6 pF @ 4 V, 1 MHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-219AA	DO-219AA	DO-219AA
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Technology	Standard	Standard	Standard
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99
HTSUS	8541.10.0080	8541.10.0080	8541.10.0080

Engineering Selection Recommendations

FS1ME_HF (Manufacturer Recommended Substitute)

The FS1ME_HF is the manufacturer-recommended substitute for the obsolete FS1ME-7. Both parts share identical electrical specifications across all critical parameters: 1000 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage drop, and 1.6 µs reverse recovery time. The FS1ME_HF maintains active product status with Diodes Incorporated, ensuring ongoing availability and supply chain continuity. Packaging is supplied as Tape & Reel (TR), which is standard for production environments. All compliance certifications align: ROHS3 Compliant, REACH Unaffected, and EAR99 classification. This part is the primary selection for direct replacement applications.

FS1MED-7 (Parametric Equivalent Substitute)

The FS1MED-7 is a parametric equivalent substitute that meets all primary electrical and mechanical requirements. This part is also active in production and available from Diodes Incorporated. The key distinction is a reduced reverse recovery time of 1 µs compared to the FS1ME-7 specification of 1.6 µs. This improvement in switching speed does not create incompatibility; it represents enhanced performance within the standard recovery classification. All other parameters, including voltage ratings, current ratings, forward voltage drop, leakage current, and capacitance, are identical. Compliance certifications are equivalent. The FS1MED-7 is suitable for applications where faster switching characteristics provide operational benefit or where supply availability of the FS1ME_HF is constrained.

Both substitute parts are manufactured by Diodes Incorporated and carry active product status, ensuring long-term component availability and technical support compared to the obsolete FS1ME-7.

Frequently Asked Questions (FAQ)

Q: Can the FS1ME_HF be used as a direct replacement for the FS1ME-7?

A: Yes. The FS1ME_HF is the manufacturer-recommended substitute and shares identical electrical specifications with the FS1ME-7 across all critical parameters: 1000 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage drop at 1 A, and 1.6 µs reverse recovery time. Both are packaged in DO-219AA surface mount format and operate across the same temperature range of -55°C to 150°C.

Q: What is the difference between FS1ME_HF and FS1MED-7?

A: Both parts are electrical and mechanical equivalents with one distinction: the FS1MED-7 has a reverse recovery time of 1 µs, compared to 1.6 µs for the FS1ME_HF. This represents faster switching performance. All other parameters—voltage ratings, current ratings, forward voltage drop, leakage current, and capacitance—are identical between the two parts.

Q: Are there packaging differences between the substitute parts?

A: The FS1ME_HF and FS1MED-7 are both supplied in Tape & Reel (TR) packaging, which is standard for surface mount production. The FS1ME-7 original part does not specify packaging format in the available data. Both substitutes use the same DO-219AA package case, ensuring mechanical compatibility with existing PCB layouts and assembly equipment.

Q: Do the substitute parts meet the same compliance requirements as the FS1ME-7?

A: Yes. Both FS1ME_HF and FS1MED-7 are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export control purposes. The HTSUS code is identical: 8541.10.0080. Compliance certifications are fully aligned with the original FS1ME-7 specification.

Q: Why is the FS1ME-7 listed as obsolete?

A: The FS1ME-7 has been discontinued by Diodes Incorporated and is no longer in active production. The manufacturer-recommended substitute FS1ME_HF and the parametric equivalent FS1MED-7 are both active products that provide identical or improved electrical performance, ensuring design continuity and supply chain reliability.

Q: Which substitute should be selected for new designs?

A: For new designs, either FS1ME_HF or FS1MED-7 is appropriate. The FS1ME_HF is the direct manufacturer recommendation. The FS1MED-7 offers improved reverse recovery time (1 µs versus 1.6 µs) and may be preferred in applications where faster switching characteristics are beneficial. Both parts are active products with assured long-term availability.

Q: Are there any thermal or electrical performance differences between the substitutes?

A: No. Both substitute parts operate across the same junction temperature range of -55°C to 150°C. Electrical performance is identical except for reverse recovery time, where the FS1MED-7 demonstrates faster switching. Forward voltage drop, reverse leakage current, and capacitance are identical across all three parts.

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