Equivalent & Substitute Parts for 8EWF12STR

Part Overview

The 8EWF12STR is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 1200 V DC reverse voltage and 8 A average rectified current in a surface mount TO-252AA (DPAK) package. This part is classified as obsolete, which necessitates identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for direct circuit substitution.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1200 V
Current - Average Rectified (Io)	8 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A
Reverse Recovery Time (trr)	270 ns
Current - Reverse Leakage @ Vr	100 µA @ 1200 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount
Operating Temperature - Junction	-40°C ~ 150°C
Technology	Standard

Substitute Part Grouping Explanation

Substitution of the 8EWF12STR is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage - DC Reverse (Vr) (Max): 1200 V
Current - Average Rectified (Io): 8 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 8 A
Reverse Recovery Time (trr): 270 ns
Current - Reverse Leakage @ Vr: 100 µA @ 1200 V
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type: Surface Mount
Operating Temperature - Junction: -40°C ~ 150°C

All substitute parts listed below meet these exact specifications. The primary distinction between substitute options relates to product status (active vs. obsolete), packaging format (Tape & Reel vs. bulk), and regulatory compliance certifications (RoHS3 compliance and AEC-Q101 qualification where applicable).

Parameter Comparison

Parameter	8EWF12STR	VS-8EWF12STR-M3	VS-8EWF12STRL-M3	VS-8EWF12STRR-M3	VS-8EWF12SLHM3
Voltage - DC Reverse (Vr) (Max)	1200 V	1200 V	1200 V	1200 V	1200 V
Current - Average Rectified (Io)	8 A	8 A	8 A	8 A	8 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A	1.3 V @ 8 A	1.3 V @ 8 A	1.3 V @ 8 A	1.3 V @ 8 A
Reverse Recovery Time (trr)	270 ns	270 ns	270 ns	270 ns	270 ns
Current - Reverse Leakage @ Vr	100 µA @ 1200 V	100 µA @ 1200 V	100 µA @ 1200 V	100 µA @ 1200 V	100 µA @ 1200 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
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	TO-252-3, DPAK (2 Leads + Tab), SC-63
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C	-40°C ~ 150°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Grade	Standard	Standard	Standard	Standard	Automotive
Qualification	Not specified	Not specified	Not specified	Not specified	AEC-Q101

Engineering Selection Recommendations

All substitute parts (VS-8EWF12STR-M3, VS-8EWF12STRL-M3, VS-8EWF12STRR-M3, and VS-8EWF12SLHM3) provide parametric equivalence to the 8EWF12STR and are suitable for direct replacement in circuit applications requiring 1200 V, 8 A general-purpose rectification.

Product Status Consideration: The original 8EWF12STR is obsolete. All substitute parts carry active product status, ensuring continued availability and manufacturing support.

Regulatory Compliance: All substitute parts are ROHS3 compliant, whereas the original part is RoHS non-compliant. This distinction is significant for applications subject to RoHS directives or customer specifications requiring RoHS compliance.

Automotive Applications: The VS-8EWF12SLHM3 variant carries automotive grade designation and AEC-Q101 qualification. This part is appropriate for automotive and high-reliability applications requiring formal automotive qualification.

Packaging Format: The original 8EWF12STR is supplied in bulk packaging. All substitute parts are supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. Bulk quantities of substitute parts may be available through alternative sourcing channels if required.

Inventory Availability: VS-8EWF12STR-M3 maintains the highest inventory level (9113 pcs), followed by VS-8EWF12SLHM3 (1546 pcs), VS-8EWF12STRR-M3 (1059 pcs), and VS-8EWF12STRL-M3 (813 pcs).

Frequently Asked Questions (FAQ)

Q: Can VS-8EWF12STR-M3 be used as a direct replacement for 8EWF12STR?

A: Yes. The VS-8EWF12STR-M3 is parametrically equivalent across all electrical specifications (1200 V reverse voltage, 8 A average rectified current, 1.3 V forward voltage at 8 A, 270 ns reverse recovery time) and mechanical specifications (TO-252AA DPAK package, surface mount). The primary differences are product status (active vs. obsolete), RoHS compliance (ROHS3 vs. non-compliant), and packaging format (Tape & Reel vs. bulk).

Q: What is the difference between VS-8EWF12STR-M3, VS-8EWF12STRL-M3, and VS-8EWF12STRR-M3?

A: These three parts are electrically and mechanically identical. The suffix variations (STR-M3, STRL-M3, STRR-M3) indicate different manufacturing or packaging variants from Vishay. All three maintain identical electrical performance and package specifications. Selection between these variants may be determined by supplier availability or internal part numbering systems.

Q: When should VS-8EWF12SLHM3 be selected instead of other substitutes?

A: The VS-8EWF12SLHM3 should be selected for applications requiring automotive-grade components with AEC-Q101 qualification. This part is suitable for automotive, industrial, and high-reliability applications where formal qualification documentation is required. For general industrial applications without automotive requirements, VS-8EWF12STR-M3 is an appropriate alternative.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts (VS-8EWF12STR-M3, VS-8EWF12STRL-M3, VS-8EWF12STRR-M3, and VS-8EWF12SLHM3) are ROHS3 compliant. The original 8EWF12STR is RoHS non-compliant. This distinction is relevant for applications subject to RoHS directives or customer specifications requiring RoHS compliance.

Q: Is the TO-252AA (DPAK) package identical across all parts?

A: Yes. All parts, including the original 8EWF12STR and all substitutes, use the TO-252-3 DPAK (2 Leads + Tab) package, designated SC-63. This ensures mechanical and thermal compatibility in existing PCB layouts and thermal management designs.

Q: What is the operating temperature range for these diodes?

A: The junction operating temperature range is -40°C to 150°C for all parts listed. This range applies to the original 8EWF12STR and all substitute parts.

Q: Are there any electrical performance differences between the substitute parts?

A: No. All substitute parts maintain identical electrical specifications: 1200 V reverse voltage, 8 A average rectified current, 1.3 V forward voltage at 8 A, 270 ns reverse recovery time, and 100 µA reverse leakage current at 1200 V. Electrical performance is equivalent across all variants.

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