SS3P3-E3/85A Equivalent & Substitute Parts

Part Overview

The SS3P3-E3/85A is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 30 V DC reverse voltage and 3 A average rectified current. The device is packaged in DO-220AA (SMP) surface mount configuration and operates across a junction temperature range of -55°C to 150°C. This part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts maintain identical electrical performance while offering active product status and improved availability.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	580 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	200 µA @ 30 V
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Schottky
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SS3P3-E3/85A is determined by electrical parameter equivalence and package compatibility. All substitute parts maintain identical voltage ratings (30 V), current ratings (3 A), forward voltage characteristics (580 mV @ 3 A), reverse leakage current (200 µA @ 30 V), and operating temperature range (-55°C to 150°C). The substitution logic is organized into two categories:

Package-Compatible Substitutes (DO-220AA): Parts SS3P3-M3/84A, SS3P3HM3/84A, SS3P3HM3/85A, and SS3P3HM3J/84A maintain the same DO-220AA package footprint as the main part, enabling direct mechanical and electrical interchange.

Package-Variant Substitute (TO-277A): Part SS3P3-M3/85A uses the TO-277A (SMPC) package, which differs mechanically but maintains all electrical specifications. This variant requires PCB layout modification.

All substitute parts are RoHS3 compliant, MSL 1 rated, and feature the same Schottky technology. Automotive-grade variants (SS3P3HM3/84A, SS3P3HM3/85A, SS3P3HM3J/84A) include AEC-Q101 qualification.

Parameter Comparison

Part Number	Vr (Max)	Io	Vf (Max) @ If	Reverse Leakage @ Vr	Package	Product Status	Grade	Qualification
SS3P3-E3/85A	30 V	3 A	580 mV @ 3 A	200 µA @ 30 V	DO-220AA	Obsolete	Standard	—
SS3P3-M3/85A	30 V	3 A	580 mV @ 3 A	200 µA @ 30 V	TO-277A	Active	Standard	—
SS3P3-M3/84A	30 V	3 A	580 mV @ 3 A	200 µA @ 30 V	DO-220AA	Active	Standard	—
SS3P3HM3/84A	30 V	3 A	580 mV @ 3 A	200 µA @ 30 V	DO-220AA	Active	Automotive	AEC-Q101
SS3P3HM3/85A	30 V	3 A	580 mV @ 3 A	200 µA @ 30 V	DO-220AA	Active	Automotive	AEC-Q101
SS3P3HM3J/84A	30 V	3 A	580 mV @ 3 A	200 µA @ 30 V	DO-220AA	Active	Automotive	AEC-Q101

Engineering Selection Recommendations

For Direct Mechanical Replacement: Select SS3P3-M3/84A, SS3P3HM3/84A, SS3P3HM3/85A, or SS3P3HM3J/84A. These parts maintain the DO-220AA package footprint identical to the obsolete SS3P3-E3/85A, requiring no PCB layout modification. All four options are active products with full availability.

For Automotive Applications: Specify SS3P3HM3/84A, SS3P3HM3/85A, or SS3P3HM3J/84A. These variants carry automotive-grade designation and AEC-Q101 qualification, meeting automotive industry reliability standards.

For Standard Industrial Applications: SS3P3-M3/84A provides the most economical active substitute with identical electrical and package specifications and highest inventory availability (144,242 units).

For Alternative Package Requirement: SS3P3-M3/85A offers active product status with TO-277A package configuration. This selection requires PCB redesign but maintains all electrical performance parameters.

All substitute parts are RoHS3 compliant and MSL 1 rated, ensuring compatibility with modern manufacturing processes and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can SS3P3-M3/84A directly replace SS3P3-E3/85A without PCB modification?

A: Yes. Both parts use the DO-220AA package with identical footprint, pinout, and electrical specifications. Direct substitution on existing PCBs is possible without layout changes.

Q: What is the difference between standard-grade and automotive-grade variants?

A: Automotive-grade variants (SS3P3HM3/84A, SS3P3HM3/85A, SS3P3HM3J/84A) include AEC-Q101 qualification and are tested to automotive reliability standards. Standard-grade parts (SS3P3-M3/84A, SS3P3-M3/85A) meet general industrial requirements. Electrical specifications are identical.

Q: Why is SS3P3-M3/85A listed as a substitute if it uses a different package?

A: SS3P3-M3/85A maintains all electrical parameters but uses TO-277A package instead of DO-220AA. It is a functional equivalent requiring PCB redesign. It is included for applications where package change is acceptable.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status, meeting environmental and regulatory requirements for electronic components.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level. These parts have unlimited shelf life under normal storage conditions and require no special moisture control during handling or storage.

Q: Which substitute part has the highest inventory availability?

A: SS3P3-M3/84A has the highest inventory with 144,242 units in stock, providing reliable supply for production requirements.

Q: Can I use SS3P3-M3/85A in place of SS3P3-E3/85A in an existing design?

A: Electrically yes, but mechanically no. SS3P3-M3/85A uses TO-277A package while SS3P3-E3/85A uses DO-220AA. PCB layout and footprint modification is required.

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