SB330-B Schottky Diode Equivalent & Substitute Parts

Part Overview

The SB330-B is a 30V, 3A Schottky rectifier diode manufactured by Diodes Incorporated in DO-201AD axial through-hole packaging. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Schottky diodes in this voltage and current class are commonly used in power supply circuits, reverse polarity protection, and high-frequency rectification applications where fast recovery characteristics are required.

Substiute Parts

SB330-B

Diodes IncorporatedIn Stock: 1185SB330-B Datasheet

Current PartRFQ

SB330-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 5577SB330-E3/54 Datasheet

MFR RecommendedRFQ

SR803HA0G

Taiwan Semiconductor CorporationIn Stock: 1075SR803HA0G Datasheet

MFR RecommendedRFQ

1N5821-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 121661N5821-E3/54 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SB330-B is determined by strict equivalence across the following critical parameters: reverse voltage rating (30V maximum), average rectified current capacity (3A), forward voltage characteristics, fast recovery speed classification, reverse leakage current, through-hole mounting configuration, DO-201AD axial package format, and operating temperature range. Parts are grouped into two categories based on these criteria:

Category 1: Direct Parametric Equivalents — Parts meeting all electrical specifications and package requirements with identical or superior performance characteristics within the defined parameter set.

Category 2: Higher Current Rated Alternatives — Parts exceeding the 3A current specification while maintaining all other critical parameters, suitable for applications requiring additional current margin within the same voltage class and package.

Parameter Comparison

Engineering Selection Recommendations

SB330-E3/54 (Vishay General Semiconductor) is the manufacturer-recommended direct substitute for the obsolete SB330-B. This part maintains identical electrical specifications, package configuration, and operating temperature range. The SB330-E3/54 carries active product status with ROHS3 compliance and REACH unaffected classification, providing regulatory advantage over the original part. Forward voltage is marginally improved at 490 mV versus 500 mV. This part is the primary selection for direct replacement in existing designs.

1N5821-E3/54 (Vishay General Semiconductor) is a parametric equivalent offering identical voltage, current, and package specifications. This part is widely available with 12,100 units in stock. The reverse leakage current specification differs at 2 mA versus 500 µA, representing a higher leakage characteristic. This part is suitable for applications where leakage current tolerance permits the higher specification. Active product status and REACH unaffected classification apply.

SR803HA0G (Taiwan Semiconductor Corporation) is a higher current rated alternative rated for 8A average rectified current within the same 30V voltage class and DO-201AD package. This part carries automotive qualification (AEC-Q101) and is suitable for applications requiring additional current capacity margin. The operating temperature range is -55°C to 125°C, representing a 10°C reduction at the lower bound compared to the original specification. Forward voltage at 550 mV reflects the higher current rating. Selection of this part is appropriate only when circuit design permits the higher current rating and can accommodate the modified temperature range.

Frequently Asked Questions (FAQ)

Q: Can SB330-E3/54 be used as a direct replacement for SB330-B without circuit modification?

A: Yes. The SB330-E3/54 maintains identical voltage rating (30V), current rating (3A), forward voltage characteristics (490 mV at 3A), fast recovery speed, reverse leakage current (500 µA at 30V), through-hole mounting, DO-201AD axial package, and operating temperature range (-65°C to 125°C). No circuit modification is required.

Q: What is the difference between 1N5821-E3/54 and SB330-E3/54?

A: Both parts share identical voltage (30V), current (3A), forward voltage (500 mV at 3A), speed, package, and temperature specifications. The primary difference is reverse leakage current: 1N5821-E3/54 specifies 2 mA at 30V compared to 500 µA for SB330-E3/54. The 1N5821-E3/54 exhibits higher leakage current and is suitable only for applications where this specification is acceptable.

Q: When should SR803HA0G be selected instead of SB330-E3/54?

A: SR803HA0G is selected when circuit design requires current capacity exceeding 3A within the 30V voltage class. The 8A rating provides additional margin for high-current applications. Selection requires verification that the operating temperature range (-55°C to 125°C) accommodates the application, as the lower bound is 10°C higher than the original specification.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts are packaged in DO-201AD axial through-hole format, maintaining mechanical and electrical compatibility with the original SB330-B. Mounting and PCB layout modifications are not required.

Q: What is the significance of REACH status in part selection?

A: The original SB330-B carries REACH Affected status, indicating potential regulatory restrictions in certain jurisdictions. All substitute parts (SB330-E3/54, 1N5821-E3/54, SR803HA0G) carry REACH Unaffected classification, providing regulatory compliance advantage for new designs and procurement.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed carry ROHS3 Compliant status, matching the original SB330-B specification and meeting current environmental regulatory requirements.

Q: What is the inventory status of substitute parts?

A: SB330-E3/54 has 5,500 units in stock, 1N5821-E3/54 has 12,100 units in stock, and SR803HA0G has 1,062 units in stock. All parts are classified as new original inventory.