Equivalent & Substitute Parts for SS3P4-M3/85A

Part Overview

The SS3P4-M3/85A is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 40 V DC reverse voltage and 3 A average rectified current in a DO-220AA surface mount package. This diode is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or application-specific qualification requirements such as automotive-grade certification.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	150	µA @ 40 V
Capacitance @ Vr, F	130	pF @ 4V, 1MHz
Package / Case	DO-220AA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SS3P4-M3/85A are qualified based on identical electrical and mechanical parameters. All substitute parts maintain the same voltage rating (40 V), current rating (3 A), forward voltage drop (600 mV @ 3 A), reverse leakage current (150 µA @ 40 V), and package type (DO-220AA surface mount). The substitution logic is based on the following key parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 3 A
Voltage - Forward (Vf) (Max) @ If: 600 mV @ 3 A
Package / Case: DO-220AA
Mounting Type: Surface Mount
Technology: Schottky
Operating Temperature Range: -55°C to 150°C

Substitute parts are differentiated by series designation (eSMP® vs. standard), automotive qualification status (AEC-Q101), and inventory availability. All substitute parts are Active status and ROHS3 compliant.

Parameter Comparison

Parameter	SS3P4-M3/85A	SS3P4-M3/84A	SS3P4HM3/84A	SS3P4HM3/85A
Manufacturer	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Category	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers	Diodes, Rectifiers
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 3 A	600 mV @ 3 A	600 mV @ 3 A	600 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	150 µA @ 40 V	150 µA @ 40 V	150 µA @ 40 V	150 µA @ 40 V
Capacitance @ Vr, F	130 pF @ 4V, 1MHz	130 pF @ 4V, 1MHz	130 pF @ 4V, 1MHz	Not specified
Package / Case	DO-220AA	DO-220AA	DO-220AA	DO-220AA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Series	eSMP®	eSMP®	Not specified	eSMP®
Grade	Not specified	Not specified	Automotive	Automotive
Qualification	Not specified	Not specified	AEC-Q101	AEC-Q101
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory (Pcs)	10123	20300	2063	10776

Engineering Selection Recommendations

All substitute parts maintain identical electrical performance and mechanical compatibility with the SS3P4-M3/85A. Selection between substitute parts is determined by application requirements and compliance specifications:

For non-automotive applications: SS3P4-M3/85A and SS3P4-M3/84A are suitable. Both are eSMP® series, ROHS3 compliant, and Active status. SS3P4-M3/84A offers higher inventory availability (20300 pcs).

For automotive applications requiring AEC-Q101 qualification: SS3P4HM3/84A and SS3P4HM3/85A are required. Both are automotive-grade, AEC-Q101 qualified, ROHS3 compliant, and Active status. SS3P4HM3/85A maintains eSMP® series designation and offers higher inventory (10776 pcs) compared to SS3P4HM3/84A (2063 pcs).

All parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8541.10.0080. Moisture sensitivity level is 1 (Unlimited) for all variants, indicating no special moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can SS3P4-M3/84A be used as a direct replacement for SS3P4-M3/85A?

A: Yes. Both parts are parametrically equivalent with identical voltage rating (40 V), current rating (3 A), forward voltage drop (600 mV @ 3 A), reverse leakage (150 µA @ 40 V), and DO-220AA package. Both are eSMP® series and ROHS3 compliant.

Q: What is the difference between eSMP® series and non-eSMP® variants?

A: The eSMP® designation indicates series classification. SS3P4-M3/85A, SS3P4-M3/84A, and SS3P4HM3/85A are eSMP® series. SS3P4HM3/84A does not specify series designation. All maintain identical electrical parameters.

Q: When should automotive-grade parts (SS3P4HM3/84A or SS3P4HM3/85A) be selected?

A: Automotive-grade parts with AEC-Q101 qualification are required for applications subject to automotive industry standards and reliability requirements. These parts are suitable for both automotive and non-automotive applications.

Q: Are all substitute parts compatible with the same PCB layout and reflow profile?

A: Yes. All substitute parts use the DO-220AA surface mount package with identical mechanical dimensions and mounting type. PCB layout and reflow profiles are interchangeable.

Q: What is the significance of the capacitance specification not being listed for SS3P4HM3/85A?

A: The capacitance value is not specified in the provided data for SS3P4HM3/85A. All other electrical parameters remain identical to other variants. Capacitance specification availability does not affect substitution eligibility.

Q: Do all substitute parts have the same moisture sensitivity requirements?

A: Yes. All parts are classified as Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling, baking, or storage requirements are necessary.

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

A: All parts maintain identical fast recovery speed specifications (≤ 500ns, > 200mA Io) and are suitable for applications within the specified operating temperature range (-55°C to 150°C). Application-specific performance validation is the responsibility of the design engineer.

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