DS9-08F Equivalent & Substitute Parts

Part Overview

The DS9-08F is a general-purpose rectifier diode manufactured by IXYS, rated for 800 V DC reverse voltage and 11 A average rectified current in a DO-203AA stud mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The diode operates across a junction temperature range of -40°C to 180°C and exhibits standard recovery characteristics with reverse leakage of 3 mA at rated voltage.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	11	A
Voltage - Forward (Vf) (Max) @ If	1.4 V @ 36 A	V @ A
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	3	mA @ 800 V
Mounting Type	Chassis, Stud Mount	—
Package / Case	DO-203AA, DO-4, Stud	—
Operating Temperature - Junction	-40 to 180	°C
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the DS9-08F is determined by the following critical parameters: voltage rating (Vr), current capacity (Io), mounting type, and package compatibility. All substitute parts must maintain the DO-203AA stud mount configuration to ensure mechanical and electrical compatibility within existing assemblies.

Substitute parts are grouped into three categories based on electrical characteristics:

Category 1: Lower Current Rating (5 A) at 800 V Parts 1N2240 and 1N2240A provide 800 V voltage compatibility but reduced current capacity. These are suitable only for applications where the 11 A requirement can be reduced to 5 A.

Category 2: Higher Current Rating (12-16 A) at 800-1000 V Parts VS-12FL80S05, 1N3623, VS-1N3672A, and VS-1N3673A provide equal or greater current capacity with voltage ratings at or above 800 V. These parts maintain functional equivalence for the DS9-08F application.

Category 3: Higher Voltage Rating (1000 V) at 12 A Parts VS-12F100M, VS-12F100, and VS-12FL100S05 provide elevated voltage ratings with comparable current capacity, suitable for applications requiring enhanced voltage margin.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	Reverse Leakage @ Vr	Mounting Type	Package	Tj Range [°C]	Product Status
DS9-08F	IXYS	800	11	1.4 @ 36 A	Standard >500ns	3 mA @ 800 V	Chassis, Stud Mount	DO-203AA	-40 to 180	Obsolete
1N2240	Microchip Technology	800	5	1.3 @ 30 A	Standard >500ns	10 µA @ 800 V	Stud Mount	DO-203AA, DO-4	-65 to 200	Active
1N2240A	Microchip Technology	800	5	1.3 @ 30 A	Standard >500ns	10 µA @ 800 V	Stud Mount	DO-203AA, DO-4	-65 to 200	Active
1N3623	Microchip Technology	800	16	1.0 @ 30 A	Standard >500ns	10 µA @ 800 V	Stud Mount	DO-203AA, DO-4	-65 to 200	Active
VS-12F100	Vishay General Semiconductor	1000	12	1.26 @ 38 A	Standard >500ns	12 mA @ 1000 V	Chassis, Stud Mount	DO-203AA, DO-4	-65 to 175	Active
VS-12F100M	Vishay General Semiconductor	1000	12	1.47 @ 600 A	Standard >500ns	Not specified	Chassis, Stud Mount	DO-203AA, DO-4	-40 to 180	Active
VS-12FL100S05	Vishay General Semiconductor	1000	12	1.4 @ 12 A	Fast Recovery ≤500ns	50 µA @ 1000 V	Chassis, Stud Mount	DO-203AA, DO-4	-65 to 150	Active
VS-12FL80S05	Vishay General Semiconductor	800	12	1.4 @ 12 A	Fast Recovery ≤500ns	50 µA @ 800 V	Chassis, Stud Mount	DO-203AA, DO-4	-65 to 150	Active
VS-1N3672A	Vishay General Semiconductor	900	12	1.35 @ 12 A	Standard >500ns	700 µA @ 900 V	Chassis, Stud Mount	DO-203AA, DO-4	-65 to 200	Active
VS-1N3673A	Vishay General Semiconductor	1000	12	1.35 @ 12 A	Standard >500ns	600 µA @ 1000 V	Chassis, Stud Mount	DO-203AA, DO-4	-65 to 200	Active

Engineering Selection Recommendations

All substitute parts listed are active production components with REACH compliance and EAR99 export classification, matching the regulatory status of the DS9-08F.

Primary Substitutes for Direct Replacement:

VS-12FL80S05 is the preferred substitute when 800 V voltage rating and 12 A current capacity are required. This part maintains the exact voltage specification of the DS9-08F while providing 1 A additional current capacity. The fast recovery characteristic (≤500ns) represents an improvement over the standard recovery of the original part. Operating temperature range extends to -65°C, providing broader environmental coverage.

VS-1N3672A provides 900 V voltage rating with 12 A current capacity and standard recovery characteristics. This part bridges the voltage and current specifications between the DS9-08F and higher-rated alternatives.

Secondary Substitutes for Elevated Voltage Applications:

VS-1N3673A and VS-12F100M both provide 1000 V voltage rating with 12 A current capacity and standard recovery characteristics. These parts are suitable for applications requiring voltage margin above the original 800 V specification. VS-12F100M matches the original operating temperature range (-40°C to 180°C).

Substitutes for Reduced Current Applications:

1N2240 and 1N2240A are suitable only when application current requirements can be reduced to 5 A. Both parts maintain 800 V voltage rating and offer extended operating temperature range to -65°C.

Substitutes for Increased Current Applications:

1N3623 provides 16 A current capacity at 800 V, suitable for applications requiring current capacity above the original 11 A specification.

Frequently Asked Questions (FAQ)

Q: Can the DS9-08F be directly replaced with a lower current rated part?

A: No. Parts rated below 11 A average rectified current (such as 1N2240 at 5 A) cannot serve as direct replacements. Substitution with lower current ratings requires circuit redesign and thermal analysis to ensure the substitute part does not exceed its current limit during normal operation.

Q: What is the primary advantage of VS-12FL80S05 as a substitute?

A: VS-12FL80S05 maintains the 800 V voltage specification of the DS9-08F while providing 12 A current capacity (1 A above the original 11 A rating). The fast recovery characteristic (≤500ns) improves switching performance compared to the standard recovery (>500ns) of the original part. This part is active production with full compliance documentation.

Q: Are higher voltage rated parts (1000 V) suitable substitutes?

A: Yes. Parts rated at 1000 V (VS-12F100M, VS-12F100, VS-12FL100S05, VS-1N3673A) are suitable substitutes for 800 V applications. The higher voltage rating provides additional safety margin and does not degrade circuit performance. These parts maintain or exceed the 11-12 A current requirement.

Q: What is the difference between standard and fast recovery diodes in this list?

A: Standard recovery diodes (DS9-08F, VS-12F100, VS-1N3672A, VS-1N3673A) exhibit recovery times greater than 500 ns. Fast recovery diodes (VS-12FL80S05, VS-12FL100S05) exhibit recovery times of 500 ns or less. Fast recovery characteristics reduce switching losses and are beneficial in high-frequency applications. Standard recovery parts are suitable for line-frequency rectification.

Q: Can I use 1N3623 (16 A) instead of the DS9-08F (11 A)?

A: Yes. The 1N3623 provides 16 A current capacity at 800 V, exceeding the original 11 A specification. This part is suitable for applications where additional current margin is beneficial. The lower forward voltage (1.0 V @ 30 A) compared to the DS9-08F (1.4 V @ 36 A) reduces power dissipation.

Q: What mounting compatibility exists between substitute parts?

A: All substitute parts use DO-203AA stud mount packaging, identical to the DS9-08F. Mechanical compatibility is maintained across all listed substitutes. Chassis mounting provisions are consistent across all parts.

Q: How do operating temperature ranges affect substitution decisions?

A: The DS9-08F operates from -40°C to 180°C. Most substitute parts extend the lower temperature limit to -65°C, providing broader environmental coverage. VS-12FL80S05 and VS-12FL100S05 limit the upper temperature to 150°C, which may restrict use in high-temperature applications. VS-12F100 limits the upper temperature to 175°C. Verify application temperature requirements before selection.

Q: Are all substitute parts RoHS compliant?

A: All Vishay substitute parts (VS series) are explicitly marked as ROHS3 Compliant. Microchip parts (1N2240, 1N2240A, 1N3623) do not specify RoHS status in the provided data. Verify RoHS compliance requirements with component suppliers for Microchip parts if this certification is mandatory for your application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message