SS1P4LHM3/84A Equivalent & Substitute Parts

Part Overview

The SS1P4LHM3/84A is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 40V DC reverse voltage and 1.5A average rectified current in a DO-220AA surface mount package. This component is classified as Active product status and carries automotive-grade qualification (AEC-Q101). Substitute parts are identified when equivalent electrical performance parameters are required but the primary part is unavailable, when alternative packaging is necessary for design constraints, or when higher current ratings are needed for circuit optimization.

Substiute Parts

SS1P4LHM3/84A

Vishay General Semiconductor - Diodes DivisionIn Stock: 24232SS1P4LHM3/84A Datasheet

Current PartRFQ

SS1P4L-M3/84A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1563SS1P4L-M3/84A Datasheet

Parametric EquivalentRFQ

DFLS140Q-7

Diodes IncorporatedIn Stock: 2573DFLS140Q-7 Datasheet

DirectRFQ

PMEG040V030EPDZ

Nexperia USA Inc.In Stock: 1115PMEG040V030EPDZ Datasheet

MFR RecommendedRFQ

SS1040HE-AU_R1_000A1

Panjit International Inc.In Stock: 3613SS1040HE-AU_R1_000A1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SS1P4LHM3/84A is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 40V
• Technology: Schottky rectifier diode
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Grade: Automotive with AEC-Q101 qualification
• RoHS Status: ROHS3 Compliant

Secondary Substitution Criteria:

• Current - Average Rectified (Io): Equal to or greater than 1.5A (for direct replacement) or lower ratings for current-limited applications
• Voltage - Forward (Vf) (Max) @ If: Comparable forward voltage drop characteristics
• Package / Case: Surface mount technology; package type may vary based on design constraints
• Operating Temperature - Junction: Minimum -55°C to 150°C range

Substitute parts are grouped into three categories: parametric equivalents (identical electrical specifications), direct manufacturer alternatives (different manufacturer, comparable performance), and manufacturer-recommended alternatives (higher current ratings or different package options).

Parameter Comparison

Engineering Selection Recommendations

SS1P4L-M3/84A (Parametric Equivalent) This part is a direct parametric equivalent to the SS1P4LHM3/84A, manufactured by the same supplier (Vishay General Semiconductor - Diodes Division). All electrical specifications, thermal characteristics, and package dimensions are identical. This substitute is suitable for direct replacement in all applications. Product status is Active, and AEC-Q101 automotive qualification is maintained. Use this substitute when the primary part number is unavailable but identical performance is required.

DFLS140Q-7 (Direct Alternative) Manufactured by Diodes Incorporated, this part meets the 40V reverse voltage requirement and maintains fast recovery speed characteristics. The current rating is 1.1A, which is lower than the primary part's 1.5A rating. This substitute is applicable in circuits where the maximum current demand does not exceed 1.1A. The operating temperature range extends to 125°C (versus 150°C for the primary part). Product status is Active with AEC-Q101 automotive qualification. Package type is POWERDI®123, which differs from the DO-220AA of the primary part and requires PCB layout verification.

SS1040HE-AU_R1_000A1 (Manufacturer Recommended) Manufactured by Panjit International Inc., this part meets the 40V reverse voltage requirement and maintains fast recovery speed characteristics. The current rating is 1.0A, which is lower than the primary part's 1.5A rating. This substitute is applicable in circuits where the maximum current demand does not exceed 1.0A. Operating temperature range is -55°C to 150°C, matching the primary part. Product status is Active with AEC-Q101 automotive qualification. Package type is SOD-123H, which differs from the DO-220AA of the primary part and requires PCB layout verification.

PMEG040V030EPDZ (Manufacturer Recommended) Manufactured by Nexperia USA Inc., this part meets the 40V reverse voltage requirement and maintains fast recovery speed characteristics with a specified reverse recovery time of 13 ns. The current rating is 3.0A, which exceeds the primary part's 1.5A rating and provides additional design margin. Operating temperature maximum is 175°C, exceeding the primary part's 150°C. Product status is listed as "Not For New Designs," indicating this part is in end-of-life phase. AEC-Q101 automotive qualification is maintained. Package type is CFP15 (TO-277, 3-PowerDFN), which differs from the DO-220AA of the primary part and requires PCB layout verification. This substitute is suitable only for existing designs where new design qualification is not required.

Frequently Asked Questions (FAQ)

Q: Can SS1P4L-M3/84A be used as a direct drop-in replacement for SS1P4LHM3/84A? A: Yes. SS1P4L-M3/84A is a parametric equivalent with identical electrical specifications, thermal characteristics, package type (DO-220AA), and automotive qualification (AEC-Q101). No circuit modifications or PCB layout changes are required.

Q: What is the difference between the main part and DFLS140Q-7? A: Both parts are 40V Schottky diodes with fast recovery characteristics and AEC-Q101 qualification. The primary differences are: (1) DFLS140Q-7 has a lower current rating of 1.1A versus 1.5A; (2) DFLS140Q-7 uses POWERDI®123 package instead of DO-220AA; (3) DFLS140Q-7 has a maximum operating temperature of 125°C versus 150°C. DFLS140Q-7 is suitable only for applications where current demand does not exceed 1.1A and PCB layout accommodates the different package footprint.

Q: Can I use SS1040HE-AU_R1_000A1 in place of SS1P4LHM3/84A? A: SS1040HE-AU_R1_000A1 meets the 40V reverse voltage and fast recovery speed requirements with AEC-Q101 qualification. However, its current rating is 1.0A, which is lower than the primary part's 1.5A. This substitute is suitable only for circuits where the maximum current demand does not exceed 1.0A. The package type is SOD-123H instead of DO-220AA, requiring PCB layout verification.

Q: Why is PMEG040V030EPDZ marked as "Not For New Designs"? A: PMEG040V030EPDZ is in end-of-life phase according to the manufacturer's product status designation. This part should not be used in new circuit designs. It is listed as a reference for existing designs only. For new designs, use SS1P4L-M3/84A, DFLS140Q-7, or SS1040HE-AU_R1_000A1 depending on current requirements and package constraints.

Q: What are the key electrical parameters that determine substitutability? A: The critical parameters are: (1) Voltage - DC Reverse (Vr) (Max) must be 40V or higher; (2) Technology must be Schottky rectifier; (3) Speed must be Fast Recovery ≤ 500ns, > 200mA (Io); (4) Current - Average Rectified (Io) must meet or exceed circuit requirements; (5) Grade must be Automotive with AEC-Q101 qualification; (6) RoHS Status must be ROHS3 Compliant.

Q: Do package differences affect circuit performance? A: Package differences (DO-220AA, POWERDI®123, SOD-123H, CFP15) affect PCB layout, thermal dissipation characteristics, and board space requirements. Electrical performance is not affected by package type when all electrical parameters are equivalent. However, PCB layout must be verified to accommodate the different package footprint and thermal requirements of each substitute.

Q: Which substitute part has the highest current rating? A: PMEG040V030EPDZ has the highest current rating at 3.0A, compared to the primary part's 1.5A. However, this part is marked "Not For New Designs" and should be used only in existing designs where new qualification is not required.

Q: Are all substitute parts automotive-grade with AEC-Q101 qualification? A: Yes. All listed substitute parts carry automotive-grade classification and AEC-Q101 qualification, matching the primary part's qualification status.