SS3P4-E3/85A Equivalent & Substitute Parts

Part Overview

The SS3P4-E3/85A 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 part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing production and procurement requirements. Substitute parts maintain identical electrical specifications and mechanical compatibility while offering active product status and improved supply chain availability.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the SS3P4-E3/85A is determined by strict equivalence across the following critical parameters:

Electrical Specifications (Non-Negotiable):

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 3 A
Voltage - Forward (Vf) (Max) @ If: 600 mV @ 3 A
Current - Reverse Leakage @ Vr: 150 µA @ 40 V
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Specifications (Non-Negotiable):

Package / Case: DO-220AA (SMP)
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C ~ 150°C

Compliance & Environmental:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain these specifications. Variations in product status (Active vs. Obsolete), packaging format (Tape & Reel vs. bulk), automotive qualification (AEC-Q100, AEC-Q101), and series designation do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Ir @ Vr	Speed	Package	Product Status	Inventory (Pcs)
SS3P4-E3/85A	Vishay	40 V	3 A	600 mV @ 3 A	150 µA @ 40 V	≤ 500ns	DO-220AA	Obsolete	1106
SS3P4-M3/85A	Vishay	40 V	3 A	600 mV @ 3 A	150 µA @ 40 V	≤ 500ns	DO-220AA	Active	10123
SS3P4-M3/84A	Vishay	40 V	3 A	600 mV @ 3 A	150 µA @ 40 V	≤ 500ns	DO-220AA	Active	20300
SS3P4HE3/84A	Vishay	40 V	3 A	600 mV @ 3 A	150 µA @ 40 V	≤ 500ns	DO-220AA	Active	1005
SS3P4HE3/85A	Vishay	40 V	3 A	600 mV @ 3 A	150 µA @ 40 V	≤ 500ns	DO-220AA	Active	1128
SS3P4HM3/84A	Vishay	40 V	3 A	600 mV @ 3 A	150 µA @ 40 V	≤ 500ns	DO-220AA	Active	2063
SS3P4HM3/85A	Vishay	40 V	3 A	600 mV @ 3 A	150 µA @ 40 V	≤ 500ns	DO-220AA	Active	10776
SS3P4HM3J/84A	Vishay	40 V	3 A	600 mV @ 3 A	150 µA @ 40 V	≤ 500ns	DO-220AA	Active	885

Engineering Selection Recommendations

Primary Substitutes (Highest Availability & Active Status):

SS3P4-M3/85A and SS3P4-M3/84A are the preferred direct replacements for the obsolete SS3P4-E3/85A. Both parts are in active production status with significantly higher inventory levels (10,123 and 20,300 units respectively). These parts maintain complete electrical and mechanical equivalence and are supplied in Tape & Reel packaging suitable for automated assembly processes.

Automotive-Grade Alternatives:

For applications requiring automotive qualification, SS3P4HE3/85A, SS3P4HE3/84A, SS3P4HM3/85A, SS3P4HM3/84A, and SS3P4HM3J/84A are qualified to AEC-Q100 or AEC-Q101 standards. These variants are suitable for automotive and high-reliability applications while maintaining identical electrical performance. SS3P4HM3/85A offers the highest inventory among automotive-qualified options (10,776 units).

Selection Criteria:

Standard Applications: Select SS3P4-M3/85A or SS3P4-M3/84A for non-automotive use cases requiring maximum supply availability.
Automotive Applications: Select SS3P4HM3/85A for AEC-Q101 qualification with optimal inventory levels.
Packaging Requirements: All listed substitutes are available in Tape & Reel format except SS3P4HE3/84A and SS3P4HE3/85A, which are supplied in bulk packaging.

All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard PCB assembly and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SS3P4-M3/85A directly replace SS3P4-E3/85A in existing designs?

A: Yes. SS3P4-M3/85A is electrically and mechanically equivalent to SS3P4-E3/85A. Both parts share identical voltage ratings (40 V), current ratings (3 A), forward voltage characteristics (600 mV @ 3 A), and DO-220AA package specifications. The primary difference is product status: SS3P4-E3/85A is obsolete while SS3P4-M3/85A is in active production.

Q: What is the difference between SS3P4-M3/85A and SS3P4-M3/84A?

A: Both parts are electrically identical with 40 V reverse voltage, 3 A current rating, and 600 mV forward voltage. The suffix designation (85A vs. 84A) indicates different manufacturing date codes or tape reel configurations. Selection between these parts does not affect circuit performance.

Q: Are automotive-qualified variants (SS3P4HM3/85A, SS3P4HE3/85A) suitable for non-automotive applications?

A: Yes. Automotive-qualified parts exceed standard reliability requirements and are fully compatible with non-automotive applications. These variants maintain identical electrical specifications and can be used as direct substitutes in any application where the standard parts are specified.

Q: What does the "HM3" designation indicate in part numbers like SS3P4HM3/85A?

A: The "HM3" suffix indicates automotive-grade qualification (AEC-Q101) and specific manufacturing process parameters. This designation does not affect electrical performance or package compatibility; it reflects enhanced quality and reliability screening.

Q: Is the DO-220AA package compatible with standard surface mount assembly equipment?

A: Yes. The DO-220AA (SMP) package is a standard surface mount package compatible with conventional pick-and-place and reflow soldering processes. All listed substitute parts use this identical package format.

Q: Can I mix different substitute part numbers in the same production batch?

A: Yes. All substitute parts listed maintain identical electrical specifications, forward voltage characteristics, reverse leakage, and thermal performance. Mixing part numbers within a single assembly does not affect circuit functionality or reliability.

Q: What is the significance of the MSL 1 (Unlimited) moisture sensitivity rating?

A: MSL 1 indicates the component has unlimited shelf life and does not require special moisture-controlled storage or baking procedures prior to assembly. This simplifies inventory management and reduces handling requirements compared to higher MSL ratings.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, meeting current environmental and hazardous substance restrictions. This ensures compatibility with modern supply chain requirements and regulatory standards.

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