B280-13 Schottky Diode Equivalent & Substitute Parts

Part Overview

The B280-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 80 V DC reverse voltage and 2 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 and mechanical specifications, while substitute parts provide functional alternatives with modified parameters within acceptable operating ranges.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	80 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	790 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	7 mA @ 80 V
Capacitance @ Vr, F	75pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB
Operating Temperature - Junction	-65°C ~ 150°C
Technology	Schottky
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the B280-13 is determined by the following critical parameters: reverse voltage rating (80 V minimum), average rectified current capacity, forward voltage drop characteristics, package compatibility (DO-214AA/SMB), and operating temperature range. Equivalent parts must match all electrical specifications and maintain the same package form factor. Substitute parts may exceed current ratings or modify secondary parameters such as reverse leakage current and capacitance, provided the primary voltage and current ratings remain compatible with the original application.

The B280-13 substitution logic is based on:

Reverse voltage rating: 80 V (minimum requirement)
Average rectified current: 2 A (minimum requirement)
Package type: DO-214AA, SMB (mandatory for mechanical compatibility)
Technology: Schottky (fast recovery rectifier)
Forward voltage drop: ≤ 850 mV @ rated current (acceptable tolerance)
Operating temperature range: -55°C to 150°C (acceptable overlap)

Parameter Comparison

Parameter	B280-13	B280-13-F	SK38B-LTP	SS28
Manufacturer	Diodes Incorporated	Diodes Incorporated	Micro Commercial Co	onsemi
Voltage - DC Reverse (Vr) (Max)	80 V	80 V	80 V	80 V
Current - Average Rectified (Io)	2 A	2 A	3 A	2 A
Voltage - Forward (Vf) (Max) @ If	790 mV @ 2 A	790 mV @ 2 A	850 mV @ 3 A	850 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	7 mA @ 80 V	7 mA @ 80 V	500 µA @ 80 V	400 µA @ 80 V
Capacitance @ Vr, F	75pF @ 4V, 1MHz	75pF @ 4V, 1MHz	250pF @ 4V, 1MHz	Not specified
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 125°C
Product Status	Discontinued at DiGi Electronics	Active	Not For New Designs	Not For New Designs
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

B280-13-F (Diodes Incorporated) is the primary equivalent substitute. This part maintains identical electrical specifications to the B280-13 while offering active product status and ROHS3 compliance. The B280-13-F is supplied in Tape & Reel packaging with 16,031 units in stock, providing superior availability compared to the discontinued B280-13. Selection of B280-13-F is appropriate for new designs and production continuity.

SK38B-LTP (Micro Commercial Co) functions as a parametric substitute with increased current capacity (3 A versus 2 A). This part is suitable for applications where higher current headroom is acceptable. The SK38B-LTP exhibits lower reverse leakage current (500 µA versus 7 mA) and higher capacitance (250pF versus 75pF), which may affect circuit performance in sensitive applications. This part carries "Not For New Designs" status and is appropriate only for legacy system maintenance.

SS28 (onsemi) is a functional substitute rated for 2 A at 80 V, matching the original current specification. The SS28 exhibits lower reverse leakage current (400 µA) and operates within a reduced temperature range (-65°C to 125°C versus -65°C to 150°C). This part carries "Not For New Designs" status and is appropriate for replacement applications where the lower maximum junction temperature is acceptable.

For new designs and production applications, B280-13-F is the recommended selection. For legacy system support, SK38B-LTP or SS28 provide functional alternatives with documented parameter variations.

Frequently Asked Questions (FAQ)

Q: Can B280-13-F directly replace B280-13 in existing designs?

A: Yes. B280-13-F maintains identical electrical specifications (80 V, 2 A, 790 mV forward voltage, 75pF capacitance) and package form factor (DO-214AA, SMB). The primary difference is packaging format (Tape & Reel versus bulk) and compliance status (ROHS3 Compliant versus RoHS non-compliant).

Q: What is the difference between B280-13 and SK38B-LTP?

A: SK38B-LTP provides higher current capacity (3 A versus 2 A) and lower reverse leakage current (500 µA versus 7 mA). Forward voltage is slightly higher (850 mV @ 3 A versus 790 mV @ 2 A). Capacitance is significantly higher (250pF versus 75pF). Both share the same 80 V reverse voltage rating and DO-214AA package. SK38B-LTP is suitable for applications requiring higher current margin or lower leakage characteristics.

Q: Is SS28 a suitable replacement for B280-13?

A: SS28 is functionally compatible for 80 V, 2 A applications. Key differences include lower reverse leakage current (400 µA versus 7 mA), higher forward voltage (850 mV versus 790 mV), and reduced maximum junction temperature (125°C versus 150°C). SS28 is appropriate for replacement applications where the lower temperature rating does not conflict with system requirements.

Q: Why does B280-13 show higher reverse leakage current than substitute parts?

A: The B280-13 specification lists 7 mA reverse leakage at 80 V, while SK38B-LTP and SS28 specify 500 µA and 400 µA respectively. This difference reflects manufacturing process variations and device characterization methods. Higher leakage in the B280-13 may indicate older process technology. Substitute parts with lower leakage may reduce power dissipation in standby conditions.

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

A: B280-13-F is supplied in Tape & Reel (TR) packaging. SK38B-LTP is supplied in Tape & Reel (TR) packaging. SS28 is supplied in Cut Tape (CT) & Digi-Reel® packaging. All three parts use the same DO-214AA, SMB package form factor for PCB mounting compatibility. Packaging format differences affect handling and automated assembly processes but not electrical or mechanical compatibility.

Q: What is the operating temperature range difference between B280-13 and SS28?

A: B280-13 operates from -65°C to 150°C junction temperature. SS28 operates from -65°C to 125°C. The 25°C difference in maximum junction temperature may be significant in high-temperature applications. If the application requires operation above 125°C, B280-13, B280-13-F, or SK38B-LTP are required.

Q: Can SK38B-LTP be used in a circuit designed for 2 A operation?

A: Yes. SK38B-LTP is rated for 3 A average rectified current, exceeding the 2 A requirement. The higher current rating provides additional safety margin. However, the increased capacitance (250pF versus 75pF) and lower reverse leakage current may affect circuit behavior in applications sensitive to junction capacitance or leakage characteristics. Circuit validation is necessary for applications with tight timing or noise specifications.

Q: What is the RoHS compliance status of each part?

A: B280-13 is RoHS non-compliant. B280-13-F, SK38B-LTP, and SS28 are all ROHS3 Compliant. For applications subject to RoHS regulations, B280-13-F is the required selection among equivalent parts.

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