VS-40HF80M Equivalent & Substitute Parts

Part Overview

The VS-40HF80M is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This component operates at 800 V DC reverse voltage with a 40 A average rectified current rating and features a DO-203AB (DO-5) stud mount chassis package. The part is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product category. Alternative part numbers within the VS-40HF80 series provide identical functional performance while offering different inventory availability or manufacturing batches.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	40	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 125	V @ A
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Mounting Type	Chassis, Stud Mount	-
Package / Case	DO-203AB, DO-5, Stud	-
Operating Temperature - Junction	-65 to 190	°C
Technology	Standard	-
RoHS Status	ROHS3 Compliant	-
Product Status	Active	-

Substitute Part Grouping Explanation

Substitution eligibility for the VS-40HF80M is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match Exactly):

Voltage - DC Reverse (Vr) (Max): 800 V
Current - Average Rectified (Io): 40 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 125 A
Speed: Standard Recovery >500ns, > 200mA (Io)

Mechanical Parameters (Must Match Exactly):

Mounting Type: Chassis, Stud Mount
Package / Case: DO-203AB, DO-5, Stud

Compliance Parameters (Must Match Exactly):

Technology: Standard
RoHS Status: ROHS3 Compliant
Product Status: Active

The substitute parts VS-40HF80 and VS-42HF80 maintain identical electrical and mechanical specifications across all critical parameters. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share the same base functional characteristics as the VS-40HF80M.

Parameter Comparison

Parameter	VS-40HF80M	VS-40HF80	VS-42HF80
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V
Current - Average Rectified (Io)	40 A	40 A	40 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 125 A	1.3 V @ 125 A	1.3 V @ 125 A
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Mounting Type	Chassis, Stud Mount	Chassis, Stud Mount	Chassis, Stud Mount
Package / Case	DO-203AB, DO-5, Stud	DO-203AB, DO-5, Stud	DO-203AB, DO-5, Stud
Operating Temperature - Junction	-65°C ~ 190°C	-65°C ~ 190°C	-65°C ~ 190°C
Technology	Standard	Standard	Standard
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—VS-40HF80M, VS-40HF80, and VS-42HF80—are classified as Active products with identical electrical and mechanical specifications. Selection between these parts is based on availability and manufacturing batch designation rather than functional performance differences.

Compliance Verification: All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity level. These certifications are consistent across the entire substitution group.

Inventory Considerations:

VS-40HF80M: 730 Pcs available
VS-40HF80: 5069 Pcs available
VS-42HF80: 1166 Pcs available

Application Compatibility: The VS-40HF80 and VS-42HF80 are direct functional equivalents to the VS-40HF80M for all applications requiring 800 V, 40 A general-purpose rectification with standard recovery characteristics in DO-203AB stud mount packaging.

Frequently Asked Questions (FAQ)

Q: Can VS-40HF80 be used as a direct replacement for VS-40HF80M?

A: Yes. The VS-40HF80 maintains identical electrical parameters (800 V reverse voltage, 40 A average rectified current, 1.3 V forward voltage), mechanical specifications (DO-203AB stud mount package), and compliance certifications (ROHS3, REACH Unaffected). Both parts are Active status products from Vishay General Semiconductor - Diodes Division.

Q: What is the difference between VS-40HF80M and VS-42HF80?

A: Both parts share identical electrical and mechanical specifications. The designation difference reflects manufacturing batch or internal product line classification. All critical parameters—voltage rating, current rating, forward voltage, recovery speed, package type, and operating temperature range—are equivalent.

Q: Are all three parts suitable for high-temperature applications?

A: Yes. All three parts operate across the same junction temperature range of -65°C to 190°C, making them suitable for identical thermal environments.

Q: Does the DO-203AB stud mount package differ between these parts?

A: No. All three parts use the identical DO-203AB (DO-5) stud mount chassis package. Physical mounting and thermal interface characteristics are equivalent.

Q: Are there any compliance differences between the substitute parts?

A: No. All three parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity level. Regulatory and environmental compliance is uniform across the substitution group.

Q: What recovery speed specification applies to all substitute parts?

A: All parts operate with Standard Recovery >500ns at >200mA (Io). This specification is consistent across VS-40HF80M, VS-40HF80, and VS-42HF80.

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