LLSD103C-TP Equivalent & Substitute Parts

Part Overview

The LLSD103C-TP is a Schottky diode manufactured by Micro Commercial Co, rated for 20V DC reverse voltage with 350mA average rectified current. This component is packaged in a Mini MELF (DO-213AC, SOD-80) surface mount configuration and features fast recovery characteristics with a 10ns reverse recovery time. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical performance specifications while accommodating packaging and availability constraints.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	20	V
Current - Average Rectified (Io)	350	mA
Voltage - Forward (Vf) (Max) @ If	600 mV @ 200 mA	mV @ mA
Reverse Recovery Time (trr)	10	ns
Current - Reverse Leakage @ Vr	5 µA @ 10 V	µA @ V
Technology	Schottky	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LLSD103C-TP is determined by equivalence across the following critical electrical parameters: maximum reverse voltage (20V), average rectified current (350mA), forward voltage drop (600mV @ 200mA), and reverse recovery time (10ns). All substitute parts must be Schottky diodes with surface mount packaging and identical voltage and current ratings. Package form factor differences are acceptable provided the substitute maintains electrical performance and board-level compatibility. The substitute part SD103CW-TP meets all electrical specifications while offering active product status and improved inventory availability.

Parameter Comparison

Parameter	LLSD103C-TP (Main Part)	SD103CW-TP (Substitute)	Match Status
Manufacturer	Micro Commercial Co	Micro Commercial Co	Identical
Technology	Schottky	Schottky	Identical
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	Identical
Current - Average Rectified (Io)	350 mA	350 mA	Identical
Voltage - Forward (Vf) (Max) @ If	600 mV @ 200 mA	600 mV @ 200 mA	Identical
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Identical
Reverse Recovery Time (trr)	10 ns	10 ns	Identical
Current - Reverse Leakage @ Vr	5 µA @ 10 V	5 µA @ 10 V	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	Different Form Factor
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 125°C	Substitute Range Narrower
Product Status	Obsolete	Active	Substitute Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical

Engineering Selection Recommendations

The SD103CW-TP is a direct electrical equivalent to the LLSD103C-TP with identical voltage, current, and switching characteristics. Both components are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for current manufacturing standards. The primary distinction is packaging: the substitute uses SOD-123 form factor instead of Mini MELF, requiring PCB layout modification. The substitute maintains MSL Level 1 (unlimited moisture sensitivity), eliminating moisture-related handling constraints. The substitute operates across a narrower junction temperature range (-55°C to 125°C versus -55°C to 150°C), which is acceptable for applications not requiring operation above 125°C. Active product status of the SD103CW-TP ensures long-term availability and supply chain continuity compared to the obsolete LLSD103C-TP.

Frequently Asked Questions (FAQ)

Question	Answer
Can SD103CW-TP replace LLSD103C-TP in all applications?	SD103CW-TP provides identical electrical performance (20V, 350mA, 600mV forward drop, 10ns recovery time). Substitution is valid for applications where junction temperature does not exceed 125°C and PCB layout accommodates SOD-123 package geometry instead of Mini MELF.
What is the primary difference between these parts?	Package form factor differs: LLSD103C-TP uses DO-213AC Mini MELF (SOD-80), while SD103CW-TP uses SOD-123. Electrical specifications are identical. Operating temperature range is narrower for the substitute (125°C maximum versus 150°C).
Are both parts RoHS compliant?	Yes. Both LLSD103C-TP and SD103CW-TP are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.
Does the substitute part require design changes?	PCB footprint modification is required due to package change from Mini MELF to SOD-123. Electrical circuit design remains unchanged. Both parts are surface mount with identical electrical performance.
What is the availability status of each part?	LLSD103C-TP is obsolete with 1045 pieces in stock. SD103CW-TP is active with 4300 pieces in stock, providing superior long-term availability and supply chain reliability.
Are the reverse recovery times equivalent?	Yes. Both parts specify 10ns reverse recovery time with fast recovery characteristics (≤500ns for currents >200mA), ensuring identical switching performance in rectification and protection circuits.
What is the moisture sensitivity classification?	Both parts are classified as MSL Level 1 (Unlimited), indicating no moisture-related handling or storage restrictions during manufacturing and assembly.