LL4151-M-18 Equivalent & Substitute Parts

Part Overview

The LL4151-M-18 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, classified within the Diodes, Rectifiers category. This component is a 50 V, 300 mA surface mount diode in SOD-80 MiniMELF packaging, designed for fast recovery applications with a reverse recovery time of 4 nanoseconds. The part maintains Active product status and carries automotive-grade qualification under AEC-Q101 standards. Substitute parts are identified to address packaging format variations and inventory availability while maintaining identical electrical and mechanical specifications.

Substiute Parts

LL4151-M-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1189LL4151-M-18 Datasheet

Current PartRFQ

LL4151-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 27041LL4151-GS18 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LL4151-M-18 are identified based on strict electrical and mechanical parameter equivalence. The substitution logic is governed by the following criteria:

Electrical Parameters (Must Match Exactly):

• 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 @ 0V, 1MHz

Mechanical Parameters (Must Match Exactly):

• Package / Case: DO-213AC, MINI-MELF, SOD-80
• Mounting Type: Surface Mount
• Operating Temperature - Junction (Max): 175°C

Compliance & Qualification (Must Match Exactly):

• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The primary distinction between the main part and substitute parts lies in the packaging format: the LL4151-M-18 is supplied in Tape & Reel (TR) format, while substitute parts may be supplied in alternative packaging formats such as Cut Tape (CT). All other electrical, mechanical, and compliance parameters remain identical across all equivalent parts.

Parameter Comparison

Engineering Selection Recommendations

The LL4151-GS18 is a direct electrical and mechanical equivalent to the LL4151-M-18. Both parts share identical electrical specifications, package geometry, mounting characteristics, and automotive-grade qualifications. The distinction between these parts is limited to packaging format: LL4151-M-18 is supplied in Tape & Reel (TR) format, while LL4151-GS18 is supplied in Cut Tape (CT) format.

Selection between these parts should be based on procurement requirements and assembly process compatibility:

LL4151-M-18 (Tape & Reel): Suitable for high-volume automated assembly operations where continuous reel feeding is required.

LL4151-GS18 (Cut Tape): Suitable for lower-volume applications, manual assembly processes, or situations where partial reel quantities are acceptable.

Both parts maintain Active product status, carry AEC-Q101 automotive qualification, and comply with ROHS3 and REACH requirements. Inventory availability differs between the two formats, with LL4151-GS18 currently showing higher stock levels (26,955 Pcs) compared to LL4151-M-18 (1,087 Pcs).

Frequently Asked Questions (FAQ)

Q: Can LL4151-GS18 be used as a direct replacement for LL4151-M-18 in automotive applications?

A: Yes. Both parts are electrically and mechanically identical, carry identical AEC-Q101 automotive qualification, and meet the same compliance standards. The only difference is packaging format (Cut Tape versus Tape & Reel).

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging supplies components on a continuous reel suitable for automated pick-and-place assembly equipment. Cut Tape packaging supplies components on tape segments of specified lengths, typically used for lower-volume applications or manual assembly. Both formats contain the same component in the same SOD-80 MiniMELF package.

Q: Are there any electrical performance differences between LL4151-M-18 and LL4151-GS18?

A: No. Both parts have identical electrical specifications including reverse voltage rating (50 V), average rectified current (300 mA), forward voltage (1 V @ 50 mA), reverse recovery time (4 ns), reverse leakage current (50 nA @ 50 V), and junction capacitance (2 pF @ 0V, 1MHz).

Q: Do both parts meet the same compliance requirements?

A: Yes. Both LL4151-M-18 and LL4151-GS18 are ROHS3 Compliant, REACH Unaffected, carry Moisture Sensitivity Level 1 (Unlimited), and hold AEC-Q101 automotive qualification.

Q: Which part should be selected for high-volume production?

A: LL4151-M-18 in Tape & Reel format is optimized for high-volume automated assembly. However, LL4151-GS18 in Cut Tape format offers significantly higher current inventory availability (26,955 Pcs versus 1,087 Pcs).

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. Both parts use identical SOD-80 MiniMELF package geometry and surface mount footprint. PCB layout and assembly processes require no modification when substituting between these parts.

Q: What is the operating temperature range for these diodes?

A: Both parts have a maximum junction operating temperature of 175°C. Specific minimum operating temperature is not provided in the component specifications.