SB330 Schottky Diode 30V 3A Equivalent & Substitute Parts

Part Overview

The SB330 is a through-hole Schottky rectifier diode manufactured by onsemi, rated for 30V DC reverse voltage and 3A average rectified current in a DO-201AD axial package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The SB330 operates across a junction temperature range of -65°C to 125°C and exhibits fast recovery characteristics suitable for high-frequency rectification applications.

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	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500 µA @ 30 V	µA
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-65°C ~ 125°C	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SB330 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 30V minimum
Current - Average Rectified (Io): 3A minimum
Voltage - Forward (Vf) (Max) @ If: 500 mV @ 3A maximum
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Through Hole
Package / Case: DO-201AD or equivalent axial configuration
Technology: Schottky

Substitute parts are classified into two categories:

Direct Equivalents maintain all electrical and mechanical parameters within the specified tolerances of the SB330, with active product status and full compliance certifications.

Similar/Parametric Equivalents meet the core electrical requirements (30V, 3A, fast recovery Schottky) but may exhibit variations in secondary parameters such as reverse leakage current, capacitance, or operating temperature range. These parts are functionally compatible for the majority of applications but require verification of specific design constraints.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ 3A	Reverse Leakage @ Vr	Package	Product Status	Inventory
SB330	onsemi	30V	3A	500 mV	500 µA @ 30V	DO-201AD	Obsolete	910 Pcs
1N5821RLG	onsemi	30V	3A	500 mV	2 mA @ 30V	DO-201AA, DO-27	Active	4654 Pcs
1N5821-AP	Micro Commercial Co	30V	3A	500 mV	500 µA @ 30V	DO-201AD	Active	773 Pcs
1N5821-BP	Micro Commercial Co	30V	3A	500 mV	500 µA @ 30V	DO-201AD	Active	972 Pcs
1N5821-TP	Micro Commercial Co	30V	3A	500 mV	500 µA @ 30V	DO-201AD	Active	6005 Pcs
1N5821	Microchip Technology	30V	3A	500 mV	100 µA @ 30V	B, Axial	Active	2069 Pcs
1N5821 A0G	Taiwan Semiconductor Corporation	30V	3A	500 mV	500 µA @ 30V	DO-201AD	Active	882 Pcs
31DQ03	SMC Diode Solutions	30V	3.3A	570 mV @ 3A	1 mA @ 30V	DO-201AD	Active	1381 Pcs
SB320E-G	Comchip Technology	20V	3A	500 mV	500 µA @ 20V	DO-201AD	Active	828 Pcs
SB330_R2_00001	Panjit International Inc.	30V	3A	500 mV	200 µA @ 30V	DO-201AD	Active	1100 Pcs
1N5821-E3/54	Vishay General Semiconductor - Diodes Division	30V	3A	500 mV	2 mA @ 30V	DO-201AD	Active	12100 Pcs

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

The following parts are recommended as direct substitutes for the obsolete SB330:

1N5821-TP (Micro Commercial Co): Active product status with DO-201AD package matching. Reverse leakage of 500 µA @ 30V matches the SB330 specification. ROHS3 compliant with MSL 1 rating. Cut Tape packaging available with 6005 pieces in stock.
1N5821-AP (Micro Commercial Co): Active product with identical electrical specifications to SB330. DO-201AD package configuration. Reverse leakage 500 µA @ 30V. Bulk packaging with 773 pieces available.
1N5821-BP (Micro Commercial Co): Active product with matching electrical parameters. DO-201AD package. Reverse leakage 500 µA @ 30V. Bulk packaging with 972 pieces in stock.
1N5821 A0G (Taiwan Semiconductor Corporation): Active product in DO-201AD package. Electrical specifications match SB330. ROHS3 compliant with MSL 1 rating. 882 pieces in inventory.
SB330_R2_00001 (Panjit International Inc.): Active product with SB330 base number designation. DO-201AD package. Reverse leakage 200 µA @ 30V (lower than SB330). Tape & Reel packaging with 1100 pieces available.

Parametric Equivalents (Conditional Compatibility):

1N5821RLG (onsemi): Active onsemi product with 30V/3A ratings. Reverse leakage 2 mA @ 30V (higher than SB330). Package configuration includes DO-201AA and DO-27 axial options. 4654 pieces in stock. Suitable where higher reverse leakage is acceptable.
1N5821-E3/54 (Vishay General Semiconductor - Diodes Division): Active product with 30V/3A specifications. Reverse leakage 2 mA @ 30V. DO-201AD package. ROHS3 compliant. Highest inventory availability at 12100 pieces.
1N5821 (Microchip Technology): Active product with 30V/3A ratings. Reverse leakage 100 µA @ 30V (lower than SB330). B axial package configuration. 2069 pieces available.
31DQ03 (SMC Diode Solutions): Active product with 30V rating and 3.3A current capability. Forward voltage 570 mV @ 3A (higher than SB330 specification). DO-201AD package. Operating temperature range -40°C to 150°C. 1381 pieces in stock. Suitable for applications tolerating higher forward voltage.

Not Recommended:

SB320E-G (Comchip Technology): 20V maximum reverse voltage rating does not meet the 30V requirement of the SB330. Not suitable for direct substitution.

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status consistent with the SB330 classification.

Frequently Asked Questions (FAQ)

Q: Can the 1N5821-TP directly replace the SB330 in my circuit?

A: Yes. The 1N5821-TP meets all critical electrical parameters: 30V reverse voltage, 3A current rating, 500 mV forward voltage @ 3A, and fast recovery characteristics. Both use DO-201AD through-hole axial packaging. The part is active with ROHS3 compliance.

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

A: Both parts are manufactured by Micro Commercial Co with identical electrical specifications (30V, 3A, 500 mV Vf). The primary difference is packaging: 1N5821-TP is supplied in Cut Tape (CT) with 6005 pieces available, while 1N5821-AP is supplied in Bulk with 773 pieces available. Select based on procurement and assembly requirements.

Q: Why does the 1N5821RLG show higher reverse leakage (2 mA) compared to the SB330 (500 µA)?

A: Reverse leakage current varies among manufacturers and manufacturing processes. The 1N5821RLG from onsemi exhibits 2 mA @ 30V leakage, which is within acceptable limits for most rectification applications. If reverse leakage is critical to your design, select parts with lower leakage specifications such as the 1N5821 from Microchip Technology (100 µA) or SB330_R2_00001 from Panjit (200 µA).

Q: Is the 31DQ03 a suitable replacement for the SB330?

A: The 31DQ03 meets the 30V voltage and 3A current requirements and uses the same DO-201AD package. However, it exhibits a higher forward voltage of 570 mV @ 3A compared to the SB330 specification of 500 mV @ 3A. This 70 mV difference may impact power dissipation and thermal performance. Use the 31DQ03 only if your circuit design accommodates higher forward voltage drop.

Q: Can I use the SB320E-G as a substitute?

A: No. The SB320E-G is rated for 20V maximum reverse voltage, which does not meet the 30V requirement of the SB330. Using this part in a 30V circuit creates risk of diode failure and circuit malfunction.

Q: What is the difference between Cut Tape (CT) and Bulk packaging?

A: Cut Tape (CT) packaging supplies components on continuous tape suitable for automated pick-and-place assembly. Bulk packaging supplies loose components. Select Cut Tape for high-volume automated assembly and Bulk for manual assembly or lower-volume applications.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended direct substitutes (1N5821-TP, 1N5821-AP, 1N5821-BP, 1N5821 A0G, SB330_R2_00001, 1N5821-E3/54) are ROHS3 compliant. The 1N5821RLG and 1N5821 from Microchip do not specify RoHS status in the provided data. Verify RoHS compliance with the manufacturer if required for your application.

Q: What is the operating temperature range difference between the SB330 and its substitutes?

A: The SB330 operates from -65°C to 125°C. Most substitutes operate within -55°C to 125°C or -65°C to 125°C ranges. The 31DQ03 extends to -40°C to 150°C. Verify that the selected substitute meets your application's temperature requirements.

Q: Which substitute has the best inventory availability?

A: The 1N5821-E3/54 from Vishay General Semiconductor has the highest inventory at 12,100 pieces. The 1N5821-TP from Micro Commercial Co has 6,005 pieces available. Both are active products with immediate availability.

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