VS-20ATS12-M3 Equivalent & Substitute Parts

Part Overview

The VS-20ATS12-M3 is a general-purpose rectifier diode rated for 1200 V DC reverse voltage and 20 A average rectified current in a TO-220-3 through-hole package. This diode is designed for standard rectification applications requiring high voltage and moderate current handling. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across all critical parameters. Alternative part numbers may be necessary due to inventory availability, supply chain considerations, or application-specific qualification requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1200	V
Current - Average Rectified (Io)	20	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 20 A	V
Current - Reverse Leakage @ Vr	100	µA @ 1200 V
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Package / Case	TO-220-3	-
Mounting Type	Through Hole	-
Operating Temperature - Junction	-40 to 150	°C
Technology	Standard	-

Substitute Part Grouping Explanation

Substitution eligibility for the VS-20ATS12-M3 is determined by strict equivalence across the following critical parameters:

Voltage Rating: DC reverse voltage must equal 1200 V maximum
Current Rating: Average rectified current must equal 20 A
Forward Voltage Drop: Maximum forward voltage must equal 1.1 V at 20 A
Reverse Leakage: Maximum reverse leakage current must equal 100 µA at 1200 V
Recovery Speed: Recovery time classification must match Standard Recovery >500ns, > 200mA (Io)
Package: Physical form factor must be TO-220-3 through-hole
Operating Temperature Range: Junction temperature range must span -40°C to 150°C
Technology Type: Must be Standard technology classification

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes. Variations in manufacturing grade, qualification standards, or inventory status do not affect electrical or mechanical compatibility.

Parameter Comparison

Parameter	VS-20ATS12-M3	VS-20ATS12HM3	Unit
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	-
Category	Diodes, Rectifiers	Diodes, Rectifiers	-
Voltage - DC Reverse (Vr) (Max)	1200	1200	V
Current - Average Rectified (Io)	20	20	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 20 A	1.1 @ 20 A	V
Current - Reverse Leakage @ Vr	100 @ 1200 V	100 @ 1200 V	µA
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	-
Package / Case	TO-220-3	TO-220-3	-
Mounting Type	Through Hole	Through Hole	-
Operating Temperature - Junction	-40 to 150	-40 to 150	°C
Technology	Standard	Standard	-
Product Status	Active	Active	-
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	-
REACH Status	REACH Unaffected	REACH Unaffected	-

Engineering Selection Recommendations

The VS-20ATS12HM3 is a direct parametric equivalent to the VS-20ATS12-M3. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical electrical specifications across all critical parameters including voltage rating, current capacity, forward voltage drop, and reverse leakage characteristics.

Both parts are active products with full RoHS3 compliance and REACH unaffected status. The VS-20ATS12HM3 carries additional automotive-grade qualification (AEC-Q101), which indicates enhanced reliability screening and qualification for automotive applications. This qualification does not alter the electrical or mechanical compatibility of the part.

Selection between these two part numbers should be based on application requirements and inventory availability. The VS-20ATS12HM3 is suitable for applications requiring automotive-grade components or enhanced reliability assurance. The VS-20ATS12-M3 is suitable for general industrial and commercial applications where automotive qualification is not required.

Frequently Asked Questions (FAQ)

Q: Can VS-20ATS12HM3 be used as a direct replacement for VS-20ATS12-M3?

A: Yes. Both parts are parametric equivalents with identical electrical specifications. All critical parameters including voltage rating (1200 V), current rating (20 A), forward voltage drop (1.1 V @ 20 A), and reverse leakage (100 µA @ 1200 V) are identical. The TO-220-3 package and through-hole mounting are identical, ensuring mechanical compatibility.

Q: What is the difference between VS-20ATS12-M3 and VS-20ATS12HM3?

A: The primary difference is that VS-20ATS12HM3 carries automotive-grade qualification (AEC-Q101) and is designated for automotive applications. Electrically and mechanically, both parts are identical. The automotive qualification indicates additional reliability screening and qualification procedures have been applied to the VS-20ATS12HM3.

Q: Are both parts RoHS compliant?

A: Yes. Both VS-20ATS12-M3 and VS-20ATS12HM3 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Can these diodes be used in high-temperature applications?

A: Both parts have an operating junction temperature range of -40°C to 150°C. Applications requiring operation at the upper temperature limit should account for potential changes in forward voltage drop and reverse leakage characteristics at elevated temperatures, though these parameters are specified at the maximum rated conditions.

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

A: No. Both parts use the TO-220-3 through-hole package with identical pinout and mechanical dimensions. They are mechanically interchangeable without any PCB or assembly modifications.

Q: What is the moisture sensitivity rating for these parts?

A: Both parts have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage, handling, or assembly.

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