SB330-T Equivalent & Substitute Parts

Part Overview

The SB330-T is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 30 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The SB330-T serves as a fast recovery rectifier suitable for applications requiring low forward voltage drop and rapid switching characteristics. Substitute parts must maintain electrical equivalence across voltage, current, and thermal specifications while accommodating available packaging and manufacturer options.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	500	mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 30 V
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-65°C ~ 150°C	—
Technology	Schottky	—

Substitute Part Grouping Explanation

Substitution of the SB330-T is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Equivalence Parameters:

Voltage - DC Reverse (Vr) (Max): 30 V
Current - Average Rectified (Io): 3 A
Technology: Schottky
Mounting Type: Through Hole
Fast Recovery Speed: ≤ 500ns, > 200mA (Io)

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: 490–550 mV @ 3 A
Current - Reverse Leakage @ Vr: 100–2000 µA @ 30 V
Operating Temperature - Junction: -65°C to -55°C (minimum), 125°C to 150°C (maximum)
Package / Case: DO-201AD or equivalent axial configurations (DO-201AA, DO-27, B Axial)

Substitute parts are grouped by manufacturer and product status. Direct substitutes maintain identical electrical ratings and packaging. Functional equivalents meet all electrical specifications but may differ in reverse leakage characteristics or operating temperature ranges within acceptable engineering tolerances.

Parameter Comparison

Parameter	SB330-T (Main)	1N5821-AP	1N5821-BP	1N5821-TP	1N5821 (Microchip)	1N5821RLG	SB330-E3/54	SR303HB0G
Manufacturer	Diodes Inc.	Micro Commercial Co	Micro Commercial Co	Micro Commercial Co	Microchip Technology	onsemi	Vishay	Taiwan Semiconductor
Vr (Max)	30 V	30 V	30 V	30 V	30 V	30 V	30 V	30 V
Io	3 A	3 A	3 A	3 A	3 A	3 A	3 A	3 A
Vf (Max) @ If	500 mV @ 3 A	500 mV @ 3 A	500 mV @ 3 A	500 mV @ 3 A	500 mV @ 3 A	500 mV @ 3 A	490 mV @ 3 A	550 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Ir @ Vr	500 µA @ 30 V	500 µA @ 30 V	500 µA @ 30 V	500 µA @ 30 V	100 µA @ 30 V	2 mA @ 30 V	500 µA @ 30 V	500 µA @ 30 V
Tj (Operating)	-65°C ~ 150°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-55°C ~ 125°C
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	B, Axial	DO-201AA, DO-27, Axial	DO-201AD, Axial	DO-201AD, Axial
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS3 Compliant	Yes	Not specified	Not specified	Yes	Not specified	Yes	Yes	Yes
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Electrical Equivalence):

The 1N5821-TP (Micro Commercial Co, Cut Tape packaging) and SB330-E3/54 (Vishay, Cut Tape packaging) are direct functional equivalents to the SB330-T. Both parts maintain identical voltage and current ratings, forward voltage characteristics, and fast recovery speed specifications. Both are RoHS3 compliant and REACH unaffected, providing regulatory compliance advantages over the obsolete SB330-T. The 1N5821-TP offers higher inventory availability (6005 units) compared to SB330-E3/54 (5500 units).

Secondary Substitutes (Active Status, Minor Parameter Variations):

The 1N5821-AP and 1N5821-BP (Micro Commercial Co, Bulk packaging) are electrically equivalent to the primary substitutes but differ in packaging format. Both maintain 30 V / 3 A ratings and identical forward voltage specifications. Operating temperature range is reduced to -55°C ~ 125°C, which is acceptable for most applications but represents a narrower upper temperature limit compared to the SB330-T specification of -65°C ~ 150°C.

The 1N5821 (Microchip Technology, B Axial package) provides superior reverse leakage performance (100 µA @ 30 V versus 500 µA @ 30 V), resulting in lower standby current. Operating temperature range extends to -65°C ~ 125°C. Package designation differs (B Axial versus DO-201AD), requiring mechanical verification for board-level compatibility.

The 1N5821RLG (onsemi, Cut Tape packaging) maintains full electrical equivalence with elevated reverse leakage (2 mA @ 30 V). Package options include DO-201AA, DO-27, and Axial configurations. Operating temperature range is -65°C ~ 125°C. RoHS3 compliance is confirmed.

Specialized Substitute (Automotive Grade):

The SR303HB0G (Taiwan Semiconductor Corporation, DO-201AD package) is qualified to AEC-Q101 automotive standards. Electrical specifications are equivalent except for forward voltage (550 mV @ 3 A, representing a 50 mV increase). Operating temperature range is -55°C ~ 125°C. This part is suitable for applications requiring automotive-grade reliability and traceability.

Regulatory Compliance Consideration:

All substitute parts are REACH unaffected, providing regulatory advantage over the SB330-T (REACH affected). RoHS3 compliance is confirmed for 1N5821-TP, 1N5821RLG, SB330-E3/54, and SR303HB0G.

Frequently Asked Questions (FAQ)

Q: Can the 1N5821-TP directly replace the SB330-T without circuit modification?

A: The 1N5821-TP is electrically equivalent across all critical parameters: 30 V reverse voltage, 3 A average rectified current, 500 mV forward voltage at 3 A, and fast recovery speed. Both use DO-201AD axial through-hole packaging. No circuit modification is required. Operating temperature range differs (-55°C ~ 125°C for 1N5821-TP versus -65°C ~ 150°C for SB330-T); verify application temperature requirements.

Q: What is the difference between 1N5821-TP, 1N5821-AP, and 1N5821-BP?

A: These three parts are manufactured by Micro Commercial Co and share identical electrical specifications (30 V, 3 A, 500 mV Vf). The suffix designates packaging format: -TP indicates Cut Tape (CT) packaging, -AP and -BP indicate Bulk packaging. Electrical performance is identical; packaging selection depends on procurement and assembly requirements.

Q: Why does the 1N5821 (Microchip) show lower reverse leakage (100 µA) compared to other substitutes?

A: Reverse leakage variation is a normal characteristic of Schottky diode manufacturing. The 1N5821 from Microchip exhibits superior reverse leakage performance, resulting in lower standby current. This is an advantage in applications sensitive to leakage current. All parts remain within acceptable operating parameters for standard rectifier applications.

Q: Is the SB330-E3/54 (Vishay) a suitable replacement for the SB330-T?

A: Yes. The SB330-E3/54 is a direct equivalent from the same base product family (SB330). Both maintain 30 V / 3 A ratings, DO-201AD packaging, and fast recovery characteristics. Forward voltage is marginally lower (490 mV versus 500 mV), representing improved efficiency. Operating temperature range extends to -65°C ~ 150°C, matching the SB330-T. RoHS3 compliance is confirmed.

Q: Can the SR303HB0G automotive-grade part be used in non-automotive applications?

A: Yes. The SR303HB0G meets all electrical requirements for standard rectifier applications (30 V, 3 A, fast recovery). AEC-Q101 qualification indicates enhanced reliability and traceability. Forward voltage is 550 mV at 3 A, representing a 50 mV increase compared to the SB330-T. Operating temperature range is -55°C ~ 125°C. Use in non-automotive applications is permissible; automotive qualification provides additional assurance but is not required.

Q: What packaging considerations apply when selecting a substitute?

A: The SB330-T uses DO-201AD axial through-hole packaging. Direct substitutes (1N5821-TP, SB330-E3/54, SR303HB0G) maintain identical DO-201AD packaging. The 1N5821 (Microchip) uses B Axial packaging, which is mechanically similar but requires verification of board-level hole spacing and lead diameter compatibility. The 1N5821RLG offers multiple package options (DO-201AA, DO-27, Axial); confirm specific package selection with supplier.

Q: Are all substitute parts RoHS3 compliant?

A: RoHS3 compliance is confirmed for 1N5821-TP, 1N5821RLG, SB330-E3/54, and SR303HB0G. Compliance status is not specified for 1N5821-AP and 1N5821-BP. The SB330-T is RoHS3 compliant. Verify RoHS3 compliance with supplier if regulatory documentation is required.

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

A: All substitute parts are REACH unaffected, indicating compliance with REACH chemical substance regulations. The SB330-T is listed as REACH affected, indicating potential regulatory restrictions on use or supply in certain jurisdictions. Selection of REACH unaffected substitutes eliminates this regulatory concern for ongoing procurement and design support.

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