LL4154-GS18 Equivalent & Substitute Parts

Part Overview

The LL4154-GS18 is a general-purpose fast recovery rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode is rated for 35 V DC reverse voltage with 300 mA average rectified current and features a 4 ns reverse recovery time, making it suitable for high-speed switching applications. The device is packaged in SOD-80 MiniMELF format and carries automotive-grade qualification under AEC-Q101 standard.

The LL4154-GS18 maintains Active product status. Identifying equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain performance consistency across manufacturing batches and procurement cycles.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	35	V
Current - Average Rectified (Io)	300	mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 30 mA	V
Reverse Recovery Time (trr)	4	ns
Current - Reverse Leakage @ Vr	100 nA @ 25 V	nA
Capacitance @ Vr, F	4 pF @ 0V, 1MHz	pF
Operating Temperature - Junction (Max)	175	°C
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
Mounting Type	Surface Mount	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitute parts for the LL4154-GS18 are identified based on strict electrical and mechanical parameter equivalence. The substitution logic is based on the following critical parameters:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 35 V
Current - Average Rectified (Io): 300 mA
Voltage - Forward (Vf) (Max) @ If: 1 V @ 30 mA
Reverse Recovery Time (trr): 4 ns
Current - Reverse Leakage @ Vr: 100 nA @ 25 V
Capacitance @ Vr, F: 4 pF @ 0V, 1MHz
Operating Temperature - Junction (Max): 175°C

Mechanical Parameters:

Package / Case: DO-213AC, MINI-MELF, SOD-80
Mounting Type: Surface Mount

Compliance Parameters:

Grade: Automotive
Qualification: AEC-Q101
RoHS Status: ROHS3 Compliant

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes for the LL4154-GS18.

Parameter Comparison

Parameter	LL4154-GS18	LL4154-GS08	Match
Voltage - DC Reverse (Vr) (Max)	35 V	35 V	✓
Current - Average Rectified (Io)	300 mA	300 mA	✓
Voltage - Forward (Vf) (Max) @ If	1 V @ 30 mA	1 V @ 30 mA	✓
Reverse Recovery Time (trr)	4 ns	4 ns	✓
Current - Reverse Leakage @ Vr	100 nA @ 25 V	100 nA @ 25 V	✓
Capacitance @ Vr, F	4 pF @ 0V, 1MHz	4 pF @ 0V, 1MHz	✓
Operating Temperature - Junction (Max)	175°C	175°C	✓
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	✓
Mounting Type	Surface Mount	Surface Mount	✓
Grade	Automotive	Automotive	✓
Qualification	AEC-Q101	AEC-Q101	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Base Product Number	LL4154	LL4154	✓

Engineering Selection Recommendations

The LL4154-GS08 is a direct parametric equivalent to the LL4154-GS18. Both devices share identical electrical specifications, mechanical packaging, and compliance certifications. Selection between these parts is based on availability and procurement requirements rather than technical performance differences.

Both parts maintain Active product status and carry AEC-Q101 automotive qualification with ROHS3 compliance. The LL4154-GS08 currently maintains higher inventory availability (25,756 pcs) compared to the LL4154-GS18 (754 pcs), which may influence procurement decisions for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the LL4154-GS08 be used as a direct replacement for the LL4154-GS18?

A: Yes. The LL4154-GS08 is a parametric equivalent with identical electrical ratings, reverse recovery time, forward voltage characteristics, and package specifications. Both devices meet AEC-Q101 automotive qualification and ROHS3 compliance requirements.

Q: Are there any differences in performance between these two parts?

A: No. All electrical parameters, including voltage ratings, current capacity, reverse recovery time, leakage current, and capacitance specifications are identical between the LL4154-GS18 and LL4154-GS08.

Q: Do both parts use the same package?

A: Yes. Both the LL4154-GS18 and LL4154-GS08 use the SOD-80 MiniMELF surface mount package (DO-213AC). They are mechanically and electrically interchangeable at the board level.

Q: What is the difference between the GS18 and GS08 designations?

A: The GS18 and GS08 designations refer to different tape and reel packaging configurations or manufacturing batches from Vishay General Semiconductor - Diodes Division. The electrical and mechanical specifications remain identical.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the LL4154-GS18 and LL4154-GS08 carry automotive-grade classification and AEC-Q101 qualification, making them suitable for automotive circuit applications.

Q: What is the maximum junction temperature for these diodes?

A: The maximum operating junction temperature for both parts is 175°C.

Q: Can these diodes handle 300 mA continuous current?

A: Yes. Both the LL4154-GS18 and LL4154-GS08 are rated for 300 mA average rectified current (Io).

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