B320A-13 Schottky Diode Equivalent & Substitute Parts

Part Overview

The B320A-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 20 V DC reverse voltage and 3 A average rectified current in a surface mount SMA (DO-214AC) package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing production and repair applications. The part carries automotive-grade qualification (AEC-Q101) and operates across a junction temperature range of -55°C to 150°C.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	20	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 @ 20 V	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the B320A-13 is determined by the following critical parameters: Schottky technology, 20 V maximum reverse voltage rating, 3 A average rectified current capacity, fast recovery speed characteristic (≤ 500ns), SMA package form factor, and automotive-grade qualification. Parts are grouped into three categories based on substitution relationship type and compliance status.

Direct Manufacturer Substitutes maintain identical electrical specifications and automotive qualification while differing only in packaging format or RoHS compliance status. These parts are sourced from the same manufacturer (Diodes Incorporated) and share the B320 base product number.

Parametric Equivalents satisfy the core electrical requirements (20 V, 3 A, Schottky, SMA package) but may exhibit variations in secondary parameters such as reverse leakage current or junction capacitance. These parts remain functionally compatible within the specified operating envelope.

Cross-Manufacturer Alternatives originate from different manufacturers and may incorporate package variations (DO-214AA versus DO-214AC) or reduced current ratings. These parts are included for reference but carry different product status classifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Temp Range	Grade	AEC-Q101	RoHS Status	Product Status
B320A-13	Diodes Inc.	20 V	3 A	500 mV @ 3 A	DO-214AC, SMA	-55 to 150°C	Automotive	Yes	Non-compliant	Discontinued
B320A-13-F	Diodes Inc.	20 V	3 A	500 mV @ 3 A	DO-214AC, SMA	-55 to 150°C	Automotive	Yes	ROHS3 Compliant	Active
B320AE-13	Diodes Inc.	20 V	3 A	500 mV @ 3 A	DO-214AC, SMA	-55 to 150°C	—	—	ROHS3 Compliant	Active
B320AQ-13-F	Diodes Inc.	20 V	3 A	500 mV @ 3 A	DO-214AC, SMA	-55 to 150°C	Automotive	Yes	ROHS3 Compliant	Active
SK32B-TP	Micro Commercial Co	20 V	3 A	500 mV @ 3 A	DO-214AA, SMB	-55 to 125°C	—	—	ROHS3 Compliant	Obsolete
SS12-LTP	Micro Commercial Co	20 V	1 A	500 mV @ 1 A	DO-214AC, SMA	-55 to 150°C	—	—	ROHS3 Compliant	Not For New Designs

Engineering Selection Recommendations

Primary Selection: B320A-13-F

The B320A-13-F is the recommended direct substitute for the discontinued B320A-13. This part is manufactured by Diodes Incorporated under the same base product number (B320) and maintains identical electrical specifications across all critical parameters: 20 V reverse voltage, 3 A average rectified current, 500 mV forward voltage drop at 3 A, and automotive-grade AEC-Q101 qualification. The B320A-13-F differs only in packaging format (Cut Tape & Digi-Reel versus unspecified packaging) and RoHS compliance status (ROHS3 Compliant versus non-compliant). This part is currently active in production with 35,100 units in stock.

Secondary Selection: B320AQ-13-F

The B320AQ-13-F provides an alternative from Diodes Incorporated with identical electrical performance and automotive qualification. This part is supplied in Tape & Reel format and carries ROHS3 compliance. It maintains the same 20 V, 3 A, and 500 mV specifications as the original B320A-13. Current inventory is 5,037 units.

Tertiary Selection: B320AE-13

The B320AE-13 is a parametric equivalent from Diodes Incorporated supplied in Tape & Reel packaging. While maintaining the core 20 V, 3 A electrical ratings and 500 mV forward voltage specification, this part exhibits reduced reverse leakage current (100 µA versus 500 µA at 20 V) and lower junction capacitance (140 pF versus 200 pF at 4 V, 1 MHz). These variations represent improved performance characteristics. The part is ROHS3 compliant and currently active with 5,300 units in stock.

Not Recommended for New Designs:

SK32B-TP (Micro Commercial Co) carries obsolete product status and incorporates a different package form factor (DO-214AA/SMB versus DO-214AC/SMA), reducing thermal performance and requiring PCB layout modification. SS12-LTP (Micro Commercial Co) is rated for only 1 A average rectified current, insufficient for 3 A circuit requirements, and carries "Not For New Designs" status.

Frequently Asked Questions (FAQ)

Q: Can B320A-13-F be used as a direct replacement for B320A-13?

A: Yes. The B320A-13-F is a direct electrical equivalent with identical voltage rating (20 V), current capacity (3 A), forward voltage drop (500 mV @ 3 A), and automotive qualification (AEC-Q101). Both parts use the DO-214AC (SMA) package. The primary difference is RoHS compliance status (ROHS3 Compliant versus non-compliant) and packaging format.

Q: What is the difference between B320AE-13 and B320AQ-13-F?

A: Both parts maintain the core 20 V, 3 A electrical specifications. B320AE-13 exhibits lower reverse leakage current (100 µA versus 500 µA) and reduced junction capacitance (140 pF versus 200 pF). B320AQ-13-F retains automotive-grade qualification (AEC-Q101), while B320AE-13 does not specify this qualification. Both are ROHS3 compliant and currently active.

Q: Why is SK32B-TP not recommended as a substitute?

A: SK32B-TP uses a different package form factor (DO-214AA/SMB) compared to the original B320A-13 (DO-214AC/SMA). This package change requires PCB layout modification and alters thermal characteristics. Additionally, SK32B-TP carries obsolete product status. The maximum junction temperature is also reduced to 125°C versus 150°C.

Q: Can SS12-LTP replace the B320A-13?

A: No. SS12-LTP is rated for only 1 A average rectified current, while the B320A-13 requires 3 A capacity. This part is insufficient for the intended application and carries "Not For New Designs" status.

Q: Are all substitute parts automotive-qualified?

A: No. B320A-13-F and B320AQ-13-F maintain AEC-Q101 automotive qualification. B320AE-13 does not specify automotive qualification. Cross-manufacturer alternatives (SK32B-TP and SS12-LTP) do not carry automotive qualification.

Q: What packaging formats are available for B320A-13 substitutes?

A: B320A-13-F is supplied in Cut Tape & Digi-Reel format. B320AE-13 and B320AQ-13-F are supplied in Tape & Reel format. All three maintain the DO-214AC (SMA) package form factor. SK32B-TP uses DO-214AA (SMB) packaging, which is not compatible with SMA footprints.

Q: Which substitute has the best availability?

A: B320A-13-F has the highest current inventory at 35,100 units in stock. B320AE-13 has 5,300 units, and B320AQ-13-F has 5,037 units available.

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