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LS4151-GS18 Equivalent & Substitute Parts
Part Overview
The LS4151-GS18 is a general-purpose fast recovery diode rated for 50 V DC reverse voltage and 300 mA average rectified current in a surface mount SOD-80 QuadroMELF package. This component is classified as Active and meets automotive-grade specifications including AEC-Q101 qualification. Substitute parts are identified when equivalent electrical characteristics, mechanical compatibility, and compliance certifications are maintained across the product line.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - DC Reverse (Vr) (Max) | 50 V |
| Current - Average Rectified (Io) | 300 mA |
| Voltage - Forward (Vf) (Max) @ If | 1 V @ 50 mA |
| Reverse Recovery Time (trr) | 4 ns |
| Current - Reverse Leakage @ Vr | 50 nA @ 50 V |
| Capacitance @ Vr, F | 2 pF @ 0 V, 1 MHz |
| Package / Case | SOD-80 Variant |
| Mounting Type | Surface Mount |
| Operating Temperature - Junction (Max) | 175°C |
| Grade | Automotive |
| Qualification | AEC-Q101 |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the LS4151-GS18 is determined by strict equivalence across the following critical parameters:
- Voltage rating: 50 V DC reverse voltage maximum
- Current rating: 300 mA average rectified current
- Forward voltage: 1 V maximum at 50 mA
- Reverse recovery time: 4 ns
- Reverse leakage current: 50 nA at 50 V
- Package type: SOD-80 QuadroMELF surface mount
- Mounting technology: Surface mount
- Thermal rating: 175°C maximum junction temperature
- Compliance: Automotive grade with AEC-Q101 qualification
- Environmental: ROHS3 compliant, MSL 1 (Unlimited)
Parts meeting all these parameters are classified as parametric equivalents and direct substitutes.
Parameter Comparison
| Parameter | LS4151-GS18 | LS4151GS08 |
|---|---|---|
| Manufacturer | Vishay General Semiconductor - Diodes Division | Vishay General Semiconductor - Diodes Division |
| Category | Diodes, Rectifiers | Diodes, Rectifiers |
| Voltage - DC Reverse (Vr) (Max) | 50 V | 50 V |
| Current - Average Rectified (Io) | 300 mA | 300 mA |
| Voltage - Forward (Vf) (Max) @ If | 1 V @ 50 mA | 1 V @ 50 mA |
| Reverse Recovery Time (trr) | 4 ns | 4 ns |
| Current - Reverse Leakage @ Vr | 50 nA @ 50 V | 50 nA @ 50 V |
| Capacitance @ Vr, F | 2 pF @ 0 V, 1 MHz | 2 pF @ 0 V, 1 MHz |
| Package / Case | SOD-80 Variant | SOD-80 Variant |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature - Junction (Max) | 175°C | 175°C |
| Grade | Automotive | Automotive |
| Qualification | AEC-Q101 | AEC-Q101 |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Active |
Engineering Selection Recommendations
The LS4151GS08 is a direct parametric equivalent to the LS4151-GS18. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications, package configuration, and compliance certifications. Selection between these parts may be based on inventory availability and supply chain considerations. Both parts maintain Active product status and meet automotive-grade requirements with AEC-Q101 qualification. Environmental compliance is equivalent, with both parts ROHS3 compliant and MSL 1 rated.
Frequently Asked Questions (FAQ)
Q: Can LS4151GS08 be used as a direct replacement for LS4151-GS18?
A: Yes. The LS4151GS08 is a parametric equivalent with identical electrical ratings, package type, and compliance certifications. All critical parameters including voltage, current, recovery time, and thermal specifications are equivalent.
Q: Are there any differences in the SOD-80 package between these parts?
A: No. Both parts use the SOD-80 QuadroMELF surface mount package variant with identical mechanical and electrical interface specifications.
Q: Do both parts meet automotive qualification requirements?
A: Yes. Both LS4151-GS18 and LS4151GS08 are automotive-grade components with AEC-Q101 qualification and are suitable for automotive applications.
Q: What is the difference between the part numbers LS4151-GS18 and LS4151GS08?
A: The part numbers represent different manufacturing batches or tape reel configurations from Vishay. The electrical and mechanical specifications are identical, making them interchangeable for circuit design purposes.
Q: Are moisture sensitivity considerations the same for both parts?
A: Yes. Both parts have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage and handling.
Q: Can these parts be used interchangeably in PCB assembly?
A: Yes. Both parts have identical SOD-80 QuadroMELF package specifications and surface mount mounting requirements, allowing direct substitution in PCB designs without layout modifications.
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