8EWF12S Equivalent & Substitute Parts

Part Overview

The 8EWF12S is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This component is rated for 1200 V DC reverse voltage with an 8 A average rectified current capacity. The device features fast recovery characteristics with a reverse recovery time of 270 ns and is housed in a TO-252-3 (DPAK) surface mount package.

The 8EWF12S is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing production requirements, maintenance operations, and system redesigns where this component is specified in existing designs.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the 8EWF12S are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic requires that candidate parts match the following key parameters:

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

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes. The VS-8EWF12S-M3 satisfies all specified parameters and is therefore a valid substitute for the 8EWF12S.

Parameter Comparison

Parameter	8EWF12S	VS-8EWF12S-M3	Match
Voltage - DC Reverse (Vr) (Max)	1200 V	1200 V	Yes
Current - Average Rectified (Io)	8 A	8 A	Yes
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 8 A	1.3 V @ 8 A	Yes
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Yes
Reverse Recovery Time (trr)	270 ns	270 ns	Yes
Current - Reverse Leakage @ Vr	100 µA @ 1200 V	100 µA @ 1200 V	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	Yes
Operating Temperature - Junction	-40°C to 150°C	-40°C to 150°C	Yes
Technology	Standard	Standard	Yes
Product Status	Obsolete	Active	Different
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Different

Engineering Selection Recommendations

The VS-8EWF12S-M3 is a direct parametric equivalent to the 8EWF12S across all electrical and mechanical specifications. Both components are manufactured by Vishay General Semiconductor - Diodes Division and share identical base product number 8EWF12.

The primary distinction between these parts is product status and regulatory compliance. The 8EWF12S is classified as obsolete, whereas the VS-8EWF12S-M3 maintains active product status with current manufacturing support. The VS-8EWF12S-M3 is ROHS3 compliant, whereas the 8EWF12S is RoHS non-compliant. Both components are REACH unaffected and classified under ECCN EAR99.

For new designs and ongoing production applications, the VS-8EWF12S-M3 is the appropriate selection due to its active status and regulatory compliance. The component is available in tube packaging with significantly higher inventory levels (15,200 pieces) compared to the obsolete 8EWF12S (1,400 pieces).

Frequently Asked Questions (FAQ)

Q: Can the VS-8EWF12S-M3 be used as a direct replacement for the 8EWF12S in existing designs?

A: Yes. The VS-8EWF12S-M3 is a parametric equivalent with identical electrical ratings (1200 V, 8 A, 1.3 V forward voltage, 270 ns reverse recovery time) and identical mechanical packaging (TO-252-3 DPAK). No circuit modifications are required.

Q: What is the difference between the 8EWF12S and VS-8EWF12S-M3?

A: Both parts are electrically and mechanically identical. The VS-8EWF12S-M3 is the current production equivalent with active product status and ROHS3 compliance. The 8EWF12S is obsolete and RoHS non-compliant.

Q: Are there any package or pinout differences between these parts?

A: No. Both components use the TO-252-3 DPAK package with 2 leads plus tab (SC-63). Pinout and mechanical dimensions are identical.

Q: What is the operating temperature range for both parts?

A: Both the 8EWF12S and VS-8EWF12S-M3 operate across a junction temperature range of -40°C to 150°C.

Q: Is the VS-8EWF12S-M3 suitable for high-reliability applications?

A: Both parts employ standard rectifier diode technology with identical electrical characteristics. Selection for high-reliability applications depends on system-level requirements beyond component specifications. The VS-8EWF12S-M3 offers the advantage of active product status and regulatory compliance.

Q: What packaging options are available for the VS-8EWF12S-M3?

A: The VS-8EWF12S-M3 is supplied in tube packaging. The 8EWF12S packaging format is not specified in available data.

Q: Are both parts RoHS compliant?

A: The VS-8EWF12S-M3 is ROHS3 compliant. The 8EWF12S is RoHS non-compliant. Both are REACH unaffected.

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