LLSD101A-7 Equivalent & Substitute Parts

Part Overview

The LLSD101A-7 is a Schottky diode manufactured by Diodes Incorporated, rated for 60 V DC reverse voltage and 15 mA average rectified current in a Mini MELF surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Substitute parts maintain electrical performance while offering improved availability and active product status.

Key Parameters

Parameter	Value
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	60 V
Current - Average Rectified (Io)	15 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 15 mA
Reverse Recovery Time (trr)	1 ns
Current - Reverse Leakage @ Vr	200 nA @ 50 V
Capacitance @ Vr, F	2 pF @ 0 V, 1 MHz
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LLSD101A-7 is determined by equivalence in the following critical electrical parameters: reverse voltage rating (60 V), forward voltage drop (1 V @ 15 mA), reverse recovery time (1 ns), reverse leakage current (200 nA @ 50 V), and junction capacitance (2 pF @ 0 V, 1 MHz). All substitute parts maintain these electrical specifications and Schottky diode technology classification.

Substitute parts are grouped into two categories based on package compatibility:

Category 1: Direct Package Equivalent (Mini MELF / SOD-80) Parts maintaining the original Mini MELF package form factor, enabling direct board-level replacement without layout modification.

Category 2: Alternative Package (SOD-123) Parts with equivalent electrical performance in an alternative surface mount package, requiring PCB layout adjustment but offering improved availability.

Parameter Comparison

Parameter	LLSD101A-7	SD101AW-7-F	LL101A-GS18
Manufacturer	Diodes Incorporated	Diodes Incorporated	Vishay General Semiconductor - Diodes Division
Technology	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	60 V	60 V	60 V
Current - Average Rectified (Io)	15 mA	15 mA	30 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 15 mA	1 V @ 15 mA	1 V @ 15 mA
Reverse Recovery Time (trr)	1 ns	1 ns	1 ns
Current - Reverse Leakage @ Vr	200 nA @ 50 V	200 nA @ 50 V	200 nA @ 50 V
Capacitance @ Vr, F	2 pF @ 0 V, 1 MHz	2 pF @ 0 V, 1 MHz	2 pF @ 0 V, 1 MHz
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	DO-213AC, MINI-MELF, SOD-80
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C	-65°C ~ 125°C	125°C (Max)
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SD101AW-7-F (Diodes Incorporated)

This part is the manufacturer-recommended substitute for the LLSD101A-7. It maintains identical electrical specifications and forward voltage characteristics. The SD101AW-7-F is classified as active product status with ROHS3 compliance. The primary design consideration is package transition from Mini MELF (DO-213AC) to SOD-123, which requires PCB layout modification. The extended operating temperature range (-65°C to 125°C) provides additional thermal margin compared to the original part. This substitute is suitable for applications where PCB redesign is feasible.

LL101A-GS18 (Vishay General Semiconductor - Diodes Division)

This part maintains the original Mini MELF package form factor (DO-213AC, SOD-80), enabling direct board-level replacement without layout modification. Electrical specifications are equivalent to the LLSD101A-7 across all critical parameters. The LL101A-GS18 is classified as active product status with ROHS3 compliance and carries AEC-Q101 automotive qualification. The current rating is specified at 30 mA, providing 2x margin over the 15 mA requirement. This substitute is suitable for applications requiring package compatibility and automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can the SD101AW-7-F be used as a direct replacement without PCB modification?

A: No. The SD101AW-7-F uses SOD-123 package geometry, while the LLSD101A-7 uses Mini MELF (DO-213AC). PCB footprint and land pattern modification is required. The LL101A-GS18 maintains the original Mini MELF package and supports direct replacement.

Q: What are the electrical differences between the substitute parts?

A: Both substitute parts maintain the critical electrical specifications of the LLSD101A-7: 60 V reverse voltage, 1 V forward voltage drop at 15 mA, 1 ns reverse recovery time, and 200 nA reverse leakage current. The LL101A-GS18 has a higher current rating (30 mA vs. 15 mA), which does not affect compatibility in applications requiring 15 mA operation.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both SD101AW-7-F and LL101A-GS18 are ROHS3 compliant, matching the compliance status of the original LLSD101A-7.

Q: Which substitute part should be selected for automotive applications?

A: The LL101A-GS18 carries AEC-Q101 automotive qualification and is suitable for automotive-grade applications. The SD101AW-7-F does not specify automotive qualification.

Q: What is the moisture sensitivity level for the substitute parts?

A: Both substitute parts have MSL 1 (Unlimited), identical to the original LLSD101A-7, indicating no moisture sensitivity restrictions during storage and handling.

Q: Can the LL101A-GS18 be used in all applications where the LLSD101A-7 was specified?

A: Yes, provided the operating temperature range requirement does not exceed -55°C to 125°C. The LL101A-GS18 specifies a maximum junction temperature of 125°C without a minimum temperature specification, which is suitable for most applications within the original temperature range.

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