LSR103 L0G Schottky Diode 30V 1A MELF Equivalent & Substitute Parts

Part Overview

The LSR103 L0G is a surface mount Schottky rectifier diode rated for 30 V DC reverse voltage and 1 A average rectified current in a DO-213AB MELF package. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Identification of equivalent and substitute parts is necessary for ongoing support of legacy designs, inventory management, and sourcing continuity.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 1 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 30 V
Capacitance @ Vr, F	110 pF @ 4 V, 1 MHz
Package / Case	DO-213AB, MELF
Mounting Type	Surface Mount
Operating Temperature - Junction	-65°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LSR103 L0G are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 30 V
Current - Average Rectified (Io): 1 A
Package / Case: DO-213AB, MELF
Mounting Type: Surface Mount
Technology: Schottky
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Capacitance @ Vr, F: 110 pF @ 4 V, 1 MHz

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in forward voltage (Vf) and reverse leakage current (Ir) are within acceptable tolerances for Schottky diode technology and do not preclude functional equivalence in standard rectification applications.

Parameter Comparison

Parameter	LSR103 L0G	BYM13-30HE3/96	BYM13-30HE3/97	SGL41-30HE3/96	SGL41-30HE3/97
Manufacturer	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	30 V	30 V	30 V	30 V	30 V
Current - Average Rectified (Io)	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
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 30 V	500 µA @ 30 V	500 µA @ 30 V	500 µA @ 30 V	500 µA @ 30 V
Capacitance @ Vr, F	110 pF @ 4 V, 1 MHz	110 pF @ 4 V, 1 MHz	110 pF @ 4 V, 1 MHz	110 pF @ 4 V, 1 MHz	110 pF @ 4 V, 1 MHz
Package / Case	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
Operating Temperature - Junction	-65°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Product Status	Not For New Designs	Active	Active	Active	Active
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)

Engineering Selection Recommendations

All listed substitute parts maintain electrical and mechanical compatibility with the LSR103 L0G within the parameters specified. The substitute parts from Vishay General Semiconductor - Diodes Division (BYM13 and SGL41 series) are classified as Active products, ensuring ongoing availability and manufacturing support.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original LSR103 L0G. Moisture sensitivity level remains at MSL 1 (Unlimited) across all alternatives, indicating no special handling requirements during storage or assembly.

Temperature Range Consideration:

The LSR103 L0G specifies an operating junction temperature range of -65°C to 125°C, while all substitute parts specify -55°C to 125°C. Applications requiring operation below -55°C require verification against specific circuit requirements.

Forward Voltage Difference:

Substitute parts exhibit a forward voltage of 500 mV @ 1 A compared to 550 mV @ 1 A for the LSR103 L0G. This 50 mV reduction represents improved efficiency characteristics in the substitute parts and does not create compatibility issues in standard rectification circuits.

Reverse Leakage Current Difference:

Substitute parts exhibit reverse leakage current of 500 µA @ 30 V compared to 1 mA @ 30 V for the LSR103 L0G. This represents improved leakage characteristics in the substitute parts and does not create compatibility issues.

Frequently Asked Questions (FAQ)

Q: Can BYM13-30HE3/96, BYM13-30HE3/97, SGL41-30HE3/96, and SGL41-30HE3/97 be used interchangeably with LSR103 L0G?

A: Yes. All substitute parts maintain identical voltage ratings (30 V), current ratings (1 A), package type (DO-213AB MELF), and fast recovery speed characteristics. The parts are electrically and mechanically compatible for standard rectification applications.

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

A: Both series maintain identical electrical specifications for the 30 V 1 A rating. The difference lies in the manufacturer's internal product line designation. Both are manufactured by Vishay General Semiconductor - Diodes Division and are classified as Active products.

Q: Why do the substitute parts have lower forward voltage than the LSR103 L0G?

A: The 50 mV reduction in forward voltage (from 550 mV to 500 mV @ 1 A) reflects manufacturing improvements in Schottky diode technology. This results in lower power dissipation and improved efficiency without affecting functional compatibility.

Q: Are there any temperature range limitations when substituting?

A: The LSR103 L0G operates from -65°C to 125°C, while substitute parts operate from -55°C to 125°C. Applications requiring operation below -55°C should retain the original LSR103 L0G or verify circuit performance at the lower temperature limit.

Q: Do all parts have the same moisture sensitivity level?

A: Yes. All parts, including the LSR103 L0G and all substitute parts, are classified as MSL 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

Q: What is the significance of the /96 and /97 designations in the part numbers?

A: The /96 and /97 designations represent different manufacturing date codes or tape reel configurations from Vishay. Both variants maintain identical electrical and mechanical specifications and are functionally equivalent.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original LSR103 L0G.

Q: Can I use these parts in new designs?

A: The LSR103 L0G is classified as Not For New Designs. The substitute parts from Vishay (BYM13 and SGL41 series) are classified as Active products and are suitable for new designs requiring 30 V 1 A Schottky rectifier diodes in DO-213AB MELF packages.

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