8EWF04STRR Equivalent & Substitute Parts

Part Overview

The 8EWF04STRR is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 400 V DC reverse voltage and 8 A average rectified current in a surface mount TO-252AA (DPAK) package. This part is classified as obsolete, indicating discontinuation from 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 diode specification.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	8 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 8 A
Speed Classification	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Mounting Type	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Operating Temperature - Junction	-40°C ~ 150°C

Substitute Part Grouping Explanation

Substitution of the 8EWF04STRR is determined by strict equivalence across the following parameters: DC reverse voltage rating (400 V), average rectified current capacity (8 A), forward voltage drop (1.2 V @ 8 A), fast recovery speed classification (≤ 500 ns), surface mount technology, and TO-252AA (DPAK) package configuration. All substitute parts listed maintain identical electrical ratings and mechanical packaging, ensuring direct functional replacement without circuit redesign. Differences in reverse recovery time (trr) and reverse leakage current measurement conditions are noted but do not preclude substitution, as all values remain within the fast recovery diode classification and acceptable operating parameters for general-purpose rectification applications.

Parameter Comparison

Parameter	8EWF04STRR	VS-8EWF04STR-M3	VS-8EWF04STRL-M3	VS-8EWF04STRR-M3
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	8 A	8 A	8 A	8 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 8 A	1.2 V @ 8 A	1.2 V @ 8 A	1.2 V @ 8 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Reverse Recovery Time (trr)	140 ns	55 ns	55 ns	200 ns
Current - Reverse Leakage @ Vr	100 µA @ 200 V	100 µA @ 400 V	100 µA @ 400 V	100 µA @ 400 V
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63
Operating Temperature - Junction	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 8EWF04STRR is obsolete and no longer in active production. All three substitute parts—VS-8EWF04STR-M3, VS-8EWF04STRL-M3, and VS-8EWF04STRR-M3—are active products from the same manufacturer with identical electrical and mechanical specifications. All substitute parts are ROHS3 compliant, addressing regulatory requirements that the original part does not meet. Selection among the three active substitutes should be based on availability and packaging format (Tape & Reel). The substitute parts demonstrate improved or equivalent reverse recovery time performance while maintaining all critical electrical parameters required for direct replacement in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the VS-8EWF04STR-M3, VS-8EWF04STRL-M3, or VS-8EWF04STRR-M3 directly replace the 8EWF04STRR without circuit modification?

A: Yes. All three substitute parts maintain identical voltage ratings (400 V), current ratings (8 A), forward voltage characteristics (1.2 V @ 8 A), and package configuration (TO-252AA DPAK). Direct substitution is supported without circuit redesign.

Q: What is the difference between the three substitute parts?

A: The three substitute parts differ only in reverse recovery time (trr): VS-8EWF04STR-M3 and VS-8EWF04STRL-M3 feature 55 ns trr, while VS-8EWF04STRR-M3 features 200 ns trr. All remain within the fast recovery diode classification and are electrically equivalent for general-purpose rectification applications.

Q: Why is the original 8EWF04STRR marked as obsolete?

A: The 8EWF04STRR has been discontinued from active production by the manufacturer. The active substitute parts provide equivalent functionality with improved regulatory compliance (ROHS3).

Q: Are there packaging differences between the original part and substitutes?

A: The original 8EWF04STRR packaging format is not specified in the provided data. All substitute parts are supplied in Tape & Reel (TR) format. Verify packaging requirements for your procurement process.

Q: Do the substitute parts meet current regulatory requirements?

A: Yes. All three substitute parts are ROHS3 compliant, whereas the original 8EWF04STRR is RoHS non-compliant. This addresses current environmental and regulatory standards for electronic components.

Q: Is there a performance advantage to selecting one substitute over the others?

A: VS-8EWF04STR-M3 and VS-8EWF04STRL-M3 offer faster reverse recovery time (55 ns versus 140 ns in the original and 200 ns in VS-8EWF04STRR-M3), which reduces switching losses in high-frequency applications. For general-purpose rectification, all three substitutes perform equivalently.

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