LSR104 L0G Schottky Diode 40V 1A MELF Equivalent & Substitute Parts

Part Overview

The LSR104 L0G is a Schottky rectifier diode rated for 40V DC reverse voltage and 1A average rectified current in a surface mount MELF (DO-213AB) package. This component is classified as Not For New Designs, indicating it has reached end-of-life status. The identification of equivalent and substitute parts is necessary to support existing designs, maintenance requirements, and production continuity for legacy applications utilizing this diode.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	mV
Speed - Fast Recovery	≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	1	mA @ 40 V
Capacitance @ Vr, F	110	pF @ 4V, 1MHz
Package / Case	DO-213AB, MELF	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65°C ~ 125°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LSR104 L0G is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 1 A
Technology: Schottky
Package / Case: DO-213AB, MELF
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Variations:

Voltage - Forward (Vf) (Max) @ If: 500 mV to 550 mV @ 1 A (within acceptable forward voltage range)
Current - Reverse Leakage @ Vr: 500 µA to 1 mA @ 40 V (within acceptable leakage specification)
Operating Temperature - Junction: -55°C ~ 125°C to -65°C ~ 125°C (wider or equivalent range acceptable)
Capacitance @ Vr, F: 110 pF @ 4V, 1MHz (when specified)

Substitute parts are grouped into two categories: Direct Substitutes (Vishay GL41 variants) and Parametric Equivalents (STMicroelectronics TMBYV10-40FILM).

Parameter Comparison

Parameter	LSR104 L0G (Taiwan Semiconductor)	BYM13-40HE3/96 (Vishay)	BYM13-40HE3/97 (Vishay)	SGL41-40HE3/96 (Vishay)	SGL41-40HE3/97 (Vishay)	TMBYV10-40FILM (STMicroelectronics)
Voltage - DC Reverse (Vr) (Max)	40 V	40 V	40 V	40 V	40 V	40 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A	500 mV @ 1 A	500 mV @ 1 A	500 mV @ 1 A	500 mV @ 1 A	550 mV @ 1 A
Speed - Fast Recovery	≤ 500ns, > 200mA (Io)	≤ 500ns, > 200mA (Io)	≤ 500ns, > 200mA (Io)	≤ 500ns, > 200mA (Io)	≤ 500ns, > 200mA (Io)	≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 40 V	500 µA @ 40 V	500 µA @ 40 V	500 µA @ 40 V	500 µA @ 40 V	500 µA @ 40 V
Capacitance @ Vr, F	110 pF @ 4V, 1MHz	110 pF @ 4V, 1MHz	110 pF @ 4V, 1MHz	110 pF @ 4V, 1MHz	110 pF @ 4V, 1MHz	Not specified
Package / Case	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF	DO-213AB, MELF
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-65°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-65°C ~ 125°C
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Product Status	Not For New Designs	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Vishay BYM13 and SGL41 Series (Direct Substitutes):

The Vishay BYM13-40HE3/96, BYM13-40HE3/97, SGL41-40HE3/96, and SGL41-40HE3/97 diodes are direct substitutes for the LSR104 L0G. All variants maintain identical electrical specifications for reverse voltage (40 V), average rectified current (1 A), fast recovery speed (≤ 500ns), and package configuration (DO-213AB, MELF). These parts are manufactured by Vishay General Semiconductor - Diodes Division and carry Active product status, ensuring long-term availability and supply chain stability. All variants are ROHS3 compliant with MSL 1 (Unlimited) rating. The Vishay parts feature lower reverse leakage current (500 µA @ 40 V) compared to the LSR104 L0G (1 mA @ 40 V), which represents an improvement in leakage performance. Forward voltage is specified at 500 mV @ 1 A, which is 50 mV lower than the LSR104 L0G specification, resulting in reduced power dissipation. Operating temperature range for Vishay variants is -55°C ~ 125°C, which is narrower at the lower end compared to the LSR104 L0G (-65°C ~ 125°C). Selection between BYM13 and SGL41 base product numbers, and between /96 and /97 variants, is determined by supplier device package designation and internal manufacturing process codes; electrical performance is equivalent across all four variants.

STMicroelectronics TMBYV10-40FILM (Parametric Equivalent):

The TMBYV10-40FILM is a parametric equivalent offering identical reverse voltage (40 V), average rectified current (1 A), forward voltage (550 mV @ 1 A), and fast recovery speed (≤ 500ns) specifications. This part is manufactured by STMicroelectronics and carries Active product status. The TMBYV10-40FILM is supplied in Cut Tape (CT) & Digi-Reel® packaging format, differing from the Tape & Reel (TR) format of the LSR104 L0G. The operating temperature range matches the LSR104 L0G (-65°C ~ 125°C). Capacitance specification is not provided for the TMBYV10-40FILM. All parts are ROHS3 compliant with MSL 1 (Unlimited) rating. The TMBYV10-40FILM is suitable for applications where STMicroelectronics supply chain preference or packaging format is required.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with existing design documentation and manufacturing processes. ECCN classification (EAR99) and HTSUS code (8541.10.0080) are identical across all parts.

Frequently Asked Questions (FAQ)

Q: Can the Vishay BYM13-40HE3/96 directly replace the LSR104 L0G in existing designs?

A: Yes. The BYM13-40HE3/96 meets all mandatory electrical parameters: 40 V reverse voltage, 1 A average rectified current, fast recovery speed (≤ 500ns), and DO-213AB MELF package configuration. The part is electrically compatible and physically interchangeable. The lower reverse leakage current (500 µA vs. 1 mA) and lower forward voltage (500 mV vs. 550 mV) represent performance improvements.

Q: What is the difference between the Vishay BYM13 and SGL41 series?

A: Both series meet identical electrical specifications for this 40V 1A application. The difference lies in the base product number designation and internal manufacturing process codes (/96 vs. /97 variants). Electrical performance, package configuration (DO-213AB, MELF), and compliance certifications are equivalent. Selection is determined by supplier availability and internal part numbering systems.

Q: Why does the TMBYV10-40FILM have unspecified capacitance?

A: The capacitance parameter is not provided in the component data for the TMBYV10-40FILM. This does not indicate a deficiency; rather, the parameter was not included in the available technical documentation. For applications where capacitance is a critical design parameter, the Vishay variants (110 pF @ 4V, 1MHz) provide specified values.

Q: Are there temperature range differences between substitutes?

A: Yes. The LSR104 L0G and TMBYV10-40FILM both specify -65°C ~ 125°C operating temperature range. The Vishay variants (BYM13 and SGL41 series) specify -55°C ~ 125°C, which is narrower at the lower temperature limit by 10°C. For applications operating below -55°C, the LSR104 L0G or TMBYV10-40FILM must be used.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel (TR) is a continuous reel format for automated pick-and-place assembly. Cut Tape (CT) & Digi-Reel® is a segmented tape format. Both formats contain the same component in the same DO-213AB MELF package. The packaging format difference affects handling and assembly equipment compatibility, not electrical performance or physical dimensions.

Q: Can the LSR104 L0G be used in new designs?

A: No. The LSR104 L0G is classified as Not For New Designs. For new designs, use active product alternatives: Vishay BYM13-40HE3/96, BYM13-40HE3/97, SGL41-40HE3/96, SGL41-40HE3/97, or STMicroelectronics TMBYV10-40FILM.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating, matching the LSR104 L0G compliance profile.

Q: What is the reverse leakage current difference between the LSR104 L0G and Vishay substitutes?

A: The LSR104 L0G specifies 1 mA @ 40 V reverse leakage current. The Vishay variants (BYM13 and SGL41 series) specify 500 µA @ 40 V, which is 50% lower. The TMBYV10-40FILM also specifies 500 µA @ 40 V. Lower reverse leakage current reduces power dissipation and improves circuit performance in applications sensitive to leakage.

Q: What is the forward voltage difference between the LSR104 L0G and Vishay substitutes?

A: The LSR104 L0G specifies 550 mV @ 1 A forward voltage. The Vishay variants (BYM13 and SGL41 series) specify 500 mV @ 1 A, which is 50 mV lower. The TMBYV10-40FILM matches the LSR104 L0G at 550 mV @ 1 A. Lower forward voltage reduces power dissipation in rectification applications.

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