LL5819 L0 Schottky Diode Equivalent & Substitute Parts

Part Overview

The LL5819 L0 is a 40 V, 1 A surface mount Schottky diode manufactured by Taiwan Semiconductor Corporation in DO-213AB MELF package. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing production and maintenance applications. Schottky diodes in this voltage and current class are widely used in power supply circuits, rectification stages, and reverse polarity protection applications where fast recovery characteristics and low forward voltage drop are required.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	900 mV @ 3 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V
Capacitance @ Vr, F	110 pF @ 4 V, 1 MHz
Package / Case	DO-213AB, MELF
Operating Temperature - Junction	-65°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LL5819 L0 is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-213AB, MELF
Technology: Schottky
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr: 500 µA @ 40 V
Capacitance @ Vr, F: 110 pF @ 4 V, 1 MHz

All identified substitute parts meet these core electrical specifications. Variations in forward voltage (Vf) at different test currents and operating temperature ranges do not preclude substitution when the primary electrical ratings remain equivalent. Packaging variants (Tape & Reel, Cut Tape, or unspecified) represent different distribution formats of electrically identical components and are interchangeable at the component level.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Ir @ Vr	C @ Vr, F	Package	Tj (Operating)	Product Status	RoHS
LL5819 L0	Taiwan Semiconductor Corporation	40 V	1 A	900 mV @ 3 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-65°C ~ 125°C	Obsolete	ROHS3 Compliant
LL5819 L0G	Taiwan Semiconductor Corporation	40 V	1 A	600 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-65°C ~ 125°C	Not For New Designs	ROHS3 Compliant
BYM13-40-E3/96	Vishay General Semiconductor - Diodes Division	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-55°C ~ 125°C	Active	ROHS3 Compliant
BYM13-40-E3/97	Vishay General Semiconductor - Diodes Division	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-55°C ~ 125°C	Active	ROHS3 Compliant
BYM13-40HE3/96	Vishay General Semiconductor - Diodes Division	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-55°C ~ 125°C	Active	ROHS3 Compliant
BYM13-40HE3/97	Vishay General Semiconductor - Diodes Division	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-55°C ~ 125°C	Active	ROHS3 Compliant
SGL41-40-E3/96	Vishay General Semiconductor - Diodes Division	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-55°C ~ 125°C	Active	ROHS3 Compliant
SGL41-40-E3/97	Vishay General Semiconductor - Diodes Division	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-55°C ~ 125°C	Active	ROHS3 Compliant
SGL41-40/96	Vishay General Semiconductor - Diodes Division	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-55°C ~ 125°C	Active	RoHS non-compliant
SGL41-40HE3/96	Vishay General Semiconductor - Diodes Division	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-55°C ~ 125°C	Active	ROHS3 Compliant
SGL41-40HE3/97	Vishay General Semiconductor - Diodes Division	40 V	1 A	500 mV @ 1 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	110 pF @ 4 V, 1 MHz	DO-213AB, MELF	-55°C ~ 125°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, ROHS3 Compliant):

The Vishay General Semiconductor BYM13 and SGL41 series parts represent the preferred substitutes for the obsolete LL5819 L0. All Vishay alternatives listed with Active product status and ROHS3 compliance provide direct electrical equivalence while offering improved long-term availability and regulatory compliance assurance.

Secondary Substitute (Not For New Designs):

The LL5819 L0G, manufactured by Taiwan Semiconductor Corporation, provides an alternative within the same product family. This part carries "Not For New Designs" status and is suitable only for legacy system maintenance or repair applications where component continuity is required.

Compliance Consideration:

The SGL41-40/96 variant is RoHS non-compliant and should be excluded from new designs or applications subject to RoHS3 regulatory requirements. All other listed substitutes maintain ROHS3 compliance status.

Operating Temperature Range:

The original LL5819 L0 operates across -65°C to 125°C. All Vishay substitute parts operate across -55°C to 125°C. Applications requiring operation below -55°C junction temperature must retain the original LL5819 L0 or LL5819 L0G.

Frequently Asked Questions (FAQ)

Q: Can BYM13-40-E3/97 directly replace LL5819 L0 in existing designs?

A: Yes. Both parts share identical electrical specifications for reverse voltage (40 V), average rectified current (1 A), fast recovery speed (≤ 500 ns), reverse leakage current (500 µA @ 40 V), and junction capacitance (110 pF @ 4 V, 1 MHz). Both use DO-213AB MELF packaging. The BYM13-40-E3/97 exhibits lower forward voltage (500 mV @ 1 A versus 900 mV @ 3 A), which represents improved performance characteristics.

Q: What is the difference between BYM13-40-E3/97 and SGL41-40-E3/97?

A: Both parts are manufactured by Vishay General Semiconductor and share identical electrical parameters. The primary difference is the base product number designation (BYM13 versus SGL41). Both are Active status, ROHS3 compliant, and electrically interchangeable.

Q: Why do some part numbers include "/96" or "/97" suffixes?

A: These suffixes denote packaging and distribution format variants. "/96" typically indicates Cut Tape (CT) & Digi-Reel® packaging, while "/97" indicates Tape & Reel (TR) packaging. These represent different supply formats of electrically identical components and do not affect functional performance.

Q: Is LL5819 L0G suitable for new product designs?

A: No. The LL5819 L0G carries "Not For New Designs" product status. This designation indicates the part is available for legacy support and maintenance applications only. New designs should utilize Active status alternatives such as BYM13-40-E3/97 or SGL41-40-E3/97.

Q: What is the significance of the "HE3" designation in part numbers like BYM13-40HE3/96?

A: The "HE3" designation is a Vishay product code variant. Parts with and without this designation (for example, BYM13-40-E3/96 versus BYM13-40HE3/96) maintain identical electrical specifications and are functionally interchangeable.

Q: Should SGL41-40/96 be used in new designs?

A: No. The SGL41-40/96 is RoHS non-compliant. Applications subject to RoHS3 regulatory requirements must use compliant alternatives such as SGL41-40-E3/96, SGL41-40-E3/97, SGL41-40HE3/96, or SGL41-40HE3/97.

Q: Are there temperature range limitations when substituting the LL5819 L0?

A: Yes. The original LL5819 L0 operates from -65°C to 125°C junction temperature. All Vishay substitutes operate from -55°C to 125°C. Applications requiring operation below -55°C must retain the original LL5819 L0 or LL5819 L0G.

Q: What inventory levels are available for substitute parts?

A: Current inventory for active substitutes includes: BYM13-40-E3/97 (10,573 pcs), SGL41-40-E3/97 (6,326 pcs), SGL41-40HE3/96 (9,100 pcs), SGL41-40-E3/96 (7,833 pcs), BYM13-40HE3/96 (6,210 pcs), and BYM13-40-E3/96 (2,038 pcs).

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