LLSD101A-TP Equivalent & Substitute Parts

Part Overview

The LLSD101A-TP is a Schottky diode rated for 60V DC reverse voltage with 15mA average rectified current, manufactured by Micro Commercial Co in a Mini MELF surface mount package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain electrical performance characteristics while accommodating available packaging options and current product availability.

Key Parameters

Parameter	Value
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
Technology	Schottky
Mounting Type	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical electrical parameters: reverse voltage rating (60V), average rectified current capacity (15mA minimum), forward voltage characteristics, reverse recovery time (1 ns), and reverse leakage current (200 nA @ 50V). All substitute parts must be Schottky diodes with surface mount technology and RoHS3 compliance.

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

Category 1: Direct Package Equivalents (SOD-123) Parts maintaining SOD-123 packaging with identical electrical specifications to the main part.

Category 2: Package Variants (SOD-80 MiniMELF) Parts with enhanced current ratings (30mA) in the original Mini MELF package form factor, suitable for applications where package footprint compatibility is prioritized over current derating.

Parameter Comparison

Parameter	LLSD101A-TP	SD101AW-TP	LL101A-GS08	LL101A-GS18	SD101AW-7-F
Manufacturer	Micro Commercial Co	Micro Commercial Co	Vishay General Semiconductor	Vishay General Semiconductor	Diodes Incorporated
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	60 V	60 V	60 V	60 V	60 V
Current - Average Rectified (Io)	15 mA	15 mA	30 mA	30 mA	15 mA
Voltage - Forward (Vf) (Max) @ If	1 V @ 15 mA	1 V @ 15 mA	410 mV @ 1 mA	1 V @ 15 mA	1 V @ 15 mA
Reverse Recovery Time (trr)	1 ns	1 ns	1 ns	1 ns	1 ns
Current - Reverse Leakage @ Vr	200 nA @ 50 V	200 nA @ 50 V	200 nA @ 50 V	200 nA @ 50 V	200 nA @ 50 V
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	SOD-123
Operating Temperature - Junction	-55°C ~ 150°C	125°C (Max)	125°C (Max)	125°C (Max)	-65°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	783 Pcs	10617 Pcs	15186 Pcs	8110 Pcs	9594 Pcs

Engineering Selection Recommendations

SD101AW-TP (Micro Commercial Co) This part is the primary direct substitute, offering identical electrical specifications and current rating to the LLSD101A-TP. The transition from Mini MELF to SOD-123 packaging requires PCB layout modification. Product status is active with substantial inventory availability (10617 pcs). Operating temperature maximum is reduced to 125°C compared to the original 150°C junction temperature. RoHS3 compliance and MSL-1 rating are maintained.

SD101AW-7-F (Diodes Incorporated) This alternative provides matching electrical performance and SOD-123 packaging identical to SD101AW-TP. The extended operating temperature range (-65°C ~ 125°C) accommodates wider environmental specifications. Product status is active with high inventory (9594 pcs). RoHS3 compliance and MSL-1 rating are maintained. Selection of this part over SD101AW-TP depends on temperature range requirements and supply chain preferences.

LL101A-GS18 (Vishay General Semiconductor) This part maintains the original Mini MELF package form factor, eliminating PCB layout redesign requirements. Current rating is doubled to 30mA, providing design margin for applications operating near the 15mA specification limit. AEC-Q101 automotive qualification is included. Product status is active with adequate inventory (8110 pcs). Operating temperature maximum is 125°C. RoHS3 compliance and MSL-1 rating are maintained. Selection is appropriate for designs requiring package footprint compatibility and automotive-grade qualification.

LL101A-GS08 (Vishay General Semiconductor) This part is functionally equivalent to LL101A-GS18, maintaining Mini MELF packaging and 30mA current rating. Forward voltage specification differs (410 mV @ 1 mA versus 1 V @ 15 mA), reflecting different measurement conditions. Product status is active with highest inventory availability (15186 pcs). Operating temperature maximum is 125°C. RoHS3 compliance and MSL-1 rating are maintained. Selection between LL101A-GS08 and LL101A-GS18 depends on automotive qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can SD101AW-TP be used as a direct replacement for LLSD101A-TP? A: SD101AW-TP meets all electrical specifications of LLSD101A-TP with identical voltage, current, and switching characteristics. The primary difference is packaging: SOD-123 versus Mini MELF. PCB layout modification is required. Operating temperature maximum is reduced from 150°C to 125°C.

Q: What is the difference between SOD-123 and Mini MELF packages? A: SOD-123 and Mini MELF (SOD-80) are distinct surface mount package formats with different footprints and land patterns. SOD-123 is smaller and more compact. Mini MELF is larger with different pin spacing. Selection depends on available PCB real estate and design constraints.

Q: Why do LL101A-GS08 and LL101A-GS18 have higher current ratings (30mA) than the original part (15mA)? A: Both Vishay parts are rated for 30mA average rectified current, providing enhanced current capacity. These parts are suitable for applications requiring higher current handling or where design margin is necessary. The 15mA specification of LLSD101A-TP remains within the 30mA capability of these substitutes.

Q: Is LL101A-GS18 suitable for automotive applications? A: LL101A-GS18 carries AEC-Q101 automotive qualification, making it suitable for automotive-grade applications. LL101A-GS08 does not include this qualification. Selection between these parts depends on automotive compliance requirements.

Q: What is the impact of the reduced operating temperature maximum (125°C versus 150°C) in substitute parts? A: The original LLSD101A-TP supports junction temperatures up to 150°C. Most substitute parts (SD101AW-TP, LL101A-GS08, LL101A-GS18) are rated to 125°C maximum. SD101AW-7-F extends to 125°C maximum. Applications operating near or above 125°C junction temperature require thermal analysis to confirm compatibility.

Q: Are all substitute parts RoHS3 compliant? A: All substitute parts listed are RoHS3 compliant with MSL-1 (unlimited) moisture sensitivity level, matching the compliance profile of LLSD101A-TP.

Q: Which substitute part should be selected for new designs? A: For new designs without existing Mini MELF footprints, SD101AW-TP or SD101AW-7-F (SOD-123 package) are preferred due to smaller package size and active product status. For designs requiring package footprint compatibility with existing Mini MELF layouts, LL101A-GS18 (with automotive qualification) or LL101A-GS08 are appropriate selections.

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