B320B-13 Schottky Diode Equivalent & Substitute Parts

Part Overview

The B320B-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 SMB (DO-214AA) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing production and repair applications. Equivalent parts maintain identical electrical specifications and package form factors, while substitute parts may offer enhanced ratings or alternative packaging configurations within the same technology class.

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	—
Capacitance @ Vr, F	200 pF @ 4V, 1MHz	—
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the B320B-13 is determined by strict equivalence across the following critical parameters: Schottky technology classification, 20 V maximum reverse voltage rating, 3 A average rectified current capacity, fast recovery speed characteristic (≤ 500ns), DO-214AA/SMB package form factor, and surface mount mounting type. Parts meeting all these criteria are classified as parametric equivalents. Parts exceeding the 3 A current rating while maintaining all other specifications are classified as higher-capacity substitutes. Packaging format variations (Tape & Reel versus Cut Tape) do not affect electrical substitutability but impact procurement and assembly workflows.

Parameter Comparison

Parameter	B320B-13	B320B-13-F	SK32B-TP	SK42BL-TP	SK32B-LTP
Manufacturer	Diodes Incorporated	Diodes Incorporated	Micro Commercial Co	Micro Commercial Co	Micro Commercial Co
Voltage - DC Reverse (Vr) (Max)	20 V	20 V	20 V	20 V	20 V
Current - Average Rectified (Io)	3 A	3 A	3 A	4 A	3 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A	500 mV @ 3 A	500 mV @ 3 A	450 mV @ 4 A	500 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	500 µA @ 20 V	500 µA @ 20 V	500 µA @ 20 V	500 µA @ 20 V	500 µA @ 20 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, HSMB	DO-214AA, SMB
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-55 to 125 °C	-55 to 150 °C	-55 to 150 °C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued at DiGi Electronics	Active	Obsolete	Not For New Designs	Not For New Designs
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

B320B-13-F (Diodes Incorporated) is the primary equivalent substitute. This part maintains identical electrical specifications and package configuration while offering active product status and ROHS3 compliance. The B320B-13-F is qualified to AEC-Q101 automotive standards and available in Tape & Reel packaging with significantly higher inventory availability (344,300 units).

SK32B-TP (Micro Commercial Co) provides parametric equivalence with identical 20 V / 3 A ratings and fast recovery characteristics. This part is classified as obsolete and available in Cut Tape & Digi-Reel packaging. Operating temperature range is limited to -55 to 125 °C compared to the B320B-13's -55 to 150 °C specification.

SK32B-LTP (Micro Commercial Co) offers parametric equivalence with identical electrical specifications and operating temperature range (-55 to 150 °C). This part is classified as not for new designs and available in Cut Tape & Digi-Reel packaging.

SK42BL-TP (Micro Commercial Co) provides higher current capacity (4 A versus 3 A) while maintaining 20 V reverse voltage rating and fast recovery characteristics. Forward voltage is reduced to 450 mV @ 4 A. This part is classified as not for new designs and available in Tape & Reel packaging. The higher current rating permits use in applications requiring additional margin above the 3 A specification.

For new designs, B320B-13-F is the recommended selection based on active product status, compliance certifications, and manufacturer support. For legacy system maintenance where the original B320B-13 is unavailable, SK32B-TP or SK32B-LTP provide direct parametric substitution. SK42BL-TP is suitable only where the increased 4 A current capacity and reduced forward voltage are compatible with circuit design requirements.

Frequently Asked Questions (FAQ)

Q: Can B320B-13-F be used as a direct replacement for B320B-13?

A: Yes. B320B-13-F maintains identical electrical specifications (20 V reverse voltage, 3 A average rectified current, 500 mV forward voltage @ 3 A, fast recovery speed) and package configuration (DO-214AA, SMB). The primary difference is packaging format (Tape & Reel versus bulk) and compliance status (ROHS3 compliant versus non-compliant). Electrical performance is equivalent.

Q: What is the difference between SK32B-TP and SK32B-LTP?

A: Both parts are manufactured by Micro Commercial Co and provide identical electrical specifications (20 V, 3 A, 500 mV forward voltage, fast recovery). The primary difference is product status: SK32B-TP is classified as obsolete, while SK32B-LTP is classified as not for new designs. Both are available in Cut Tape & Digi-Reel packaging. SK32B-TP has a reduced operating temperature range (-55 to 125 °C) compared to SK32B-LTP (-55 to 150 °C).

Q: Can SK42BL-TP replace B320B-13 in all applications?

A: SK42BL-TP has higher current capacity (4 A versus 3 A) and lower forward voltage (450 mV @ 4 A versus 500 mV @ 3 A). These characteristics make it suitable for applications where the additional current margin is beneficial or required. However, the different electrical characteristics require circuit-level evaluation to confirm compatibility. SK42BL-TP is not a direct parametric equivalent due to the 4 A rating.

Q: What packaging formats are available for these substitutes?

A: B320B-13-F is supplied in Tape & Reel (TR) format. SK32B-TP and SK32B-LTP are supplied in Cut Tape (CT) & Digi-Reel format. SK42BL-TP is supplied in Tape & Reel (TR) format. Packaging format selection depends on assembly equipment compatibility and procurement volume requirements.

Q: Are all substitute parts RoHS compliant?

A: B320B-13-F, SK32B-TP, SK42BL-TP, and SK32B-LTP are all ROHS3 compliant. The original B320B-13 is RoHS non-compliant. For applications requiring RoHS compliance, B320B-13-F is the recommended selection.

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

A: B320B-13, B320B-13-F, SK42BL-TP, and SK32B-LTP all operate from -55 to 150 °C. SK32B-TP has a reduced range of -55 to 125 °C. For applications requiring the full -55 to 150 °C range, SK32B-TP is not suitable.

Q: Which substitute has the best availability?

A: B320B-13-F has the highest inventory availability at 344,300 units. SK32B-LTP has 6,836 units, SK32B-TP has 3,669 units, and SK42BL-TP has 2,788 units available.

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