VSSAF3L45HM3_A/I Equivalent & Substitute Parts

Part Overview

The VSSAF3L45HM3_A/I is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, classified within the TMBS® and SlimSMA™ series. This surface mount component operates at 45 V DC reverse voltage with a 3 A average rectified current rating and is housed in a DO-221AC (SMA Flat Leads) package. The device is qualified to AEC-Q101 automotive standards and maintains active product status. Substitute parts are identified based on identical electrical specifications, mechanical compatibility, and compliance certifications to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	450 mV @ 3 A	mV
Speed - Fast Recovery	≤ 500 ns, > 200 mA (Io)	ns
Current - Reverse Leakage @ Vr	450	µA @ 45 V
Capacitance @ Vr, F	425 pF @ 4 V, 1 MHz	pF
Package / Case	DO-221AC, SMA Flat Leads	—
Operating Temperature - Junction	-40 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the VSSAF3L45HM3_A/I are identified through parametric equivalence. The substitution logic is based on the following critical parameters that must remain identical:

Voltage - DC Reverse (Vr) (Max): 45 V
Current - Average Rectified (Io): 3 A
Voltage - Forward (Vf) (Max) @ If: 450 mV @ 3 A
Speed - Fast Recovery: ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr: 450 µA @ 45 V
Capacitance @ Vr, F: 425 pF @ 4 V, 1 MHz
Package / Case: DO-221AC, SMA Flat Leads
Operating Temperature - Junction: -40°C to 150°C
Grade: Automotive
Qualification: AEC-Q101
Technology: Schottky
Series: TMBS®, SlimSMA™

All substitute parts must maintain identical electrical performance characteristics, mechanical compatibility with DO-221AC surface mount footprints, and automotive-grade qualification status.

Parameter Comparison

Parameter	VSSAF3L45HM3_A/I	VSSAF3L45HM3_A/H
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Category	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Schottky	Schottky
Series	TMBS®, SlimSMA™	TMBS®, SlimSMA™
Voltage - DC Reverse (Vr) (Max)	45 V	45 V
Current - Average Rectified (Io)	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	450 mV @ 3 A	450 mV @ 3 A
Speed - Fast Recovery	≤ 500 ns, > 200 mA (Io)	≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	450 µA @ 45 V	450 µA @ 45 V
Capacitance @ Vr, F	425 pF @ 4 V, 1 MHz	425 pF @ 4 V, 1 MHz
Package / Case	DO-221AC, SMA Flat Leads	DO-221AC, SMA Flat Leads
Mounting Type	Surface Mount	Surface Mount
Operating Temperature - Junction	-40°C to 150°C	-40°C to 150°C
Grade	Automotive	Automotive
Qualification	AEC-Q101	AEC-Q101
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 VSSAF3L45HM3_A/H serves as a direct parametric equivalent to the VSSAF3L45HM3_A/I. Both components are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical electrical specifications, mechanical packaging, and compliance certifications. Both parts are active products with AEC-Q101 automotive qualification, ROHS3 compliance, and unlimited moisture sensitivity rating (MSL 1). The substitution is valid for applications requiring 45 V Schottky rectifier diodes with 3 A average rectified current in DO-221AC surface mount packages. Component selection between these two parts may be determined by inventory availability and supply chain considerations, as both satisfy identical functional and compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can VSSAF3L45HM3_A/H replace VSSAF3L45HM3_A/I in existing designs?

A: Yes. Both parts are parametrically equivalent Schottky rectifier diodes with identical electrical specifications, forward voltage characteristics, reverse leakage current, and capacitance values. They share the same DO-221AC package footprint and automotive-grade AEC-Q101 qualification.

Q: Are there differences in package dimensions between these parts?

A: No. Both components use the DO-221AC (SMA Flat Leads) package with identical mechanical specifications and surface mount footprint compatibility.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both VSSAF3L45HM3_A/I and VSSAF3L45HM3_A/H are qualified to AEC-Q101 automotive standards and carry automotive-grade classification.

Q: What is the difference between the part number suffixes _A/I and _A/H?

A: The suffixes indicate different tape and reel configurations or manufacturing lot designations. The electrical and mechanical specifications remain identical between these variants.

Q: Are both parts RoHS compliant?

A: Yes. Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

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

A: Yes. Both parts maintain identical operating temperature ranges from -40°C to 150°C junction temperature, supporting equivalent thermal performance in automotive and industrial applications.

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

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage, handling, or reflow processes.

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