SB130-B Schottky Diode Equivalent & Substitute Parts

Part Overview

The SB130-B is a 30V, 1A Schottky rectifier diode manufactured by Diodes Incorporated in DO-41 through-hole packaging. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement. Schottky diodes in this voltage and current class are widely used in power supply circuits, reverse polarity protection, and high-frequency switching applications where fast recovery characteristics are required.

Substiute Parts

SB130-B

Diodes IncorporatedIn Stock: 15374SB130-B Datasheet

Current PartRFQ

SB130-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 9180SB130-E3/54 Datasheet

DirectRFQ

SB130-E3/73

Vishay General Semiconductor - Diodes DivisionIn Stock: 3233SB130-E3/73 Datasheet

DirectRFQ

DSB1A30

Microchip TechnologyIn Stock: 931DSB1A30 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SB130-B is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 30 V
• Current - Average Rectified (Io): 1 A
• Technology: Schottky
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial

Acceptable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Variations within typical Schottky diode specifications
• Current - Reverse Leakage @ Vr: Variations within acceptable leakage ranges
• Speed: Fast Recovery characteristic maintained

All substitute parts listed maintain identical voltage and current ratings, Schottky technology, and through-hole axial packaging. Variations in forward voltage drop and reverse leakage current remain within acceptable operating margins for standard rectification applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended):

The SB130-E3/54 and SB130-E3/73 from Vishay General Semiconductor are direct functional equivalents to the SB130-B. Both parts are active products with identical electrical ratings (30V, 1A), matching Schottky technology, and identical through-hole DO-41 packaging. Both maintain ROHS3 compliance and feature superior forward voltage characteristics (480 mV vs. 500 mV). The SB130-E3/54 offers higher inventory availability (9149 units) compared to SB130-E3/73 (3200 units). Both are REACH unaffected, providing regulatory advantage over the original SB130-B.

Secondary Substitute (Conditional):

The DSB1A30 from Microchip Technology meets all critical electrical and mechanical parameters (30V, 1A, Schottky, through-hole DO-41). However, this part is RoHS non-compliant, which may restrict use in applications requiring RoHS3 certification. The DSB1A30 exhibits lower reverse leakage current (100 µA vs. 500 µA) and higher forward voltage drop (600 mV vs. 500 mV). Selection of this part requires verification of compliance requirements for the target application.

Frequently Asked Questions (FAQ)

Q: Can the SB130-E3/54 and SB130-E3/73 be used interchangeably with the SB130-B?

A: Yes. Both Vishay parts are direct functional equivalents with identical voltage ratings (30V), current ratings (1A), Schottky technology, and through-hole DO-41 packaging. The primary difference is packaging format (Cut Tape vs. bulk), which does not affect electrical performance or circuit compatibility.

Q: What is the difference between SB130-E3/54 and SB130-E3/73?

A: Both parts are electrically identical with matching 30V/1A ratings, forward voltage (480 mV @ 1A), and reverse leakage characteristics. The designation difference reflects packaging tape specifications. SB130-E3/54 has higher inventory availability. Selection between these parts depends on procurement quantity and packaging requirements.

Q: Why does the DSB1A30 have different forward voltage and reverse leakage specifications?

A: The DSB1A30 is manufactured by Microchip Technology using different process technology than the Diodes Incorporated SB130-B and Vishay SB130-E3 series. While all three parts meet the 30V/1A Schottky diode classification, manufacturing variations result in different forward voltage drop (600 mV vs. 480-500 mV) and reverse leakage current (100 µA vs. 500 µA). These differences remain within acceptable operating margins for standard rectification circuits.

Q: Is the DSB1A30 suitable for RoHS-compliant applications?

A: No. The DSB1A30 is RoHS non-compliant, making it unsuitable for applications requiring RoHS3 certification. The SB130-E3/54 and SB130-E3/73 are both ROHS3 compliant and are the recommended choices for RoHS-restricted applications.

Q: Are all substitute parts available in the same DO-41 package?

A: Yes. All substitute parts (SB130-E3/54, SB130-E3/73, and DSB1A30) are available in DO-204AL (DO-41) axial through-hole packaging, ensuring direct mechanical compatibility with the original SB130-B footprint.

Q: What is the impact of lower reverse leakage current in the DSB1A30?

A: Lower reverse leakage current (100 µA vs. 500 µA) in the DSB1A30 indicates reduced parasitic current flow when the diode is reverse-biased. This characteristic may provide marginal benefits in low-power or high-impedance circuits but does not affect standard rectification performance. The SB130-E3 series with 500 µA leakage remains fully functional for all standard applications.

Q: Can the SB130-B be replaced in existing circuit boards?

A: Yes. All substitute parts maintain identical through-hole axial lead configuration and DO-41 package dimensions, enabling direct replacement in existing PCB designs without layout modifications.