SS2P4-E3/85A Equivalent & Substitute Parts

Part Overview

The SS2P4-E3/85A is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 40 V DC reverse voltage and 2 A average rectified current in a DO-220AA surface mount package. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within the same application category.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	150 µA @ 40 V
Package / Case	DO-220AA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
Technology	Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SS2P4-E3/85A is determined by equivalence in the following critical parameters: reverse voltage rating (40 V), average rectified current (2 A), forward voltage drop (550 mV @ 2 A), recovery speed (Fast Recovery ≤ 500ns), reverse leakage current (150 µA @ 40 V), and surface mount package compatibility. Parts are grouped into two categories:

Direct Manufacturer Equivalents (Vishay eSMP® Series): Parts SS2P4-M3/85A, SS2P4-M3/84A, SS2P4HM3/84A, and SS2P4HM3/85A maintain identical electrical specifications and DO-220AA packaging. These parts differ in product status (active versus obsolete), packaging format (tape & reel), and qualification level (automotive-grade variants with AEC-Q101 certification available).

Cross-Manufacturer Equivalent (Nexperia): Part PMEG4020ER,115 provides functional equivalence with identical voltage and current ratings, fast recovery speed, and surface mount technology. This part uses SOD-123W packaging instead of DO-220AA, requiring PCB layout modification.

Parameter Comparison

Parameter	SS2P4-E3/85A	SS2P4-M3/85A	SS2P4-M3/84A	SS2P4HM3/84A	SS2P4HM3/85A	PMEG4020ER,115
Manufacturer	Vishay	Vishay	Vishay	Vishay	Vishay	Nexperia
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V	40 V	40 V
Current - Average Rectified (Io)	2 A	2 A	2 A	2 A	2 A	2 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 2 A	550 mV @ 2 A	550 mV @ 2 A	550 mV @ 2 A	550 mV @ 2 A	490 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	150 µA @ 40 V	150 µA @ 40 V	150 µA @ 40 V	150 µA @ 40 V	150 µA @ 40 V	100 µA @ 40 V
Package / Case	DO-220AA	DO-220AA	DO-220AA	DO-220AA	DO-220AA	SOD-123W
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	150°C (Max)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Package Compatibility (DO-220AA): Select from Vishay eSMP® series equivalents SS2P4-M3/85A, SS2P4-M3/84A, SS2P4HM3/84A, or SS2P4HM3/85A. All four parts are active products with ROHS3 compliance and identical electrical specifications to the obsolete SS2P4-E3/85A. The automotive-grade variants (SS2P4HM3/84A and SS2P4HM3/85A) carry AEC-Q101 qualification and are suitable for applications requiring automotive-level reliability. Standard industrial variants (SS2P4-M3/85A and SS2P4-M3/84A) are appropriate for general commercial applications.

For Cross-Manufacturer Substitution: The Nexperia PMEG4020ER,115 provides electrical equivalence with superior reverse leakage performance (100 µA versus 150 µA) and lower forward voltage drop (490 mV versus 550 mV). This part requires PCB layout modification due to SOD-123W packaging. Selection of this part is appropriate when PCB redesign is feasible and the improved electrical characteristics provide system-level benefits.

Inventory and Availability: SS2P4-M3/84A offers the highest inventory availability (107,200 pieces), followed by SS2P4-M3/85A (1,089 pieces). Both automotive-grade variants and the Nexperia part maintain adequate stock levels (1,157 to 2,400 pieces).

Frequently Asked Questions (FAQ)

Q: Can SS2P4-M3/85A directly replace SS2P4-E3/85A without PCB modification?

A: Yes. SS2P4-M3/85A maintains identical electrical specifications and DO-220AA packaging. No PCB layout changes are required. Both parts are surface mount components with the same footprint and pin configuration.

Q: What is the difference between SS2P4-M3/84A and SS2P4-M3/85A?

A: Both parts are electrically identical with 40 V reverse voltage, 2 A current rating, and 550 mV forward voltage drop. The designation difference (84A versus 85A) reflects manufacturing date code or internal Vishay classification. Selection between these parts does not affect circuit performance.

Q: Are the automotive-grade variants (SS2P4HM3/84A and SS2P4HM3/85A) suitable for non-automotive applications?

A: Yes. Automotive-grade parts with AEC-Q101 qualification exceed the reliability requirements of standard industrial applications. These parts are fully compatible with non-automotive designs and provide enhanced quality assurance.

Q: Why does PMEG4020ER,115 have lower reverse leakage current (100 µA versus 150 µA)?

A: This reflects different manufacturing processes and materials between Nexperia and Vishay. The lower leakage current is a performance advantage in applications sensitive to standby power consumption. However, both values are within acceptable limits for standard rectifier applications.

Q: What PCB modifications are required to use PMEG4020ER,115 instead of SS2P4-E3/85A?

A: PMEG4020ER,115 uses SOD-123W packaging instead of DO-220AA. PCB footprint, trace routing, and component placement must be redesigned to accommodate the different package geometry. Electrical circuit connections remain functionally identical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SS2P4-M3/85A, SS2P4-M3/84A, SS2P4HM3/84A, SS2P4HM3/85A, and PMEG4020ER,115) are ROHS3 compliant and suitable for applications requiring environmental compliance.

Q: Can I mix different substitute parts in the same production run?

A: Yes, provided all parts meet the electrical specifications required by the circuit design. Vishay eSMP® series parts (SS2P4-M3/85A, SS2P4-M3/84A, SS2P4HM3/84A, SS2P4HM3/85A) are interchangeable from an electrical standpoint. However, mixing DO-220AA and SOD-123W packages requires separate PCB designs.

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