SK18 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SK18 is an active Schottky rectifier diode manufactured by Diotec Semiconductor, rated for 80V DC reverse voltage and 1A average rectified current in a surface mount DO-214AC (SMA) package. This component is designed for fast recovery applications with a maximum forward voltage of 850 mV at 1A and operating junction temperature range of -50°C to 150°C. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring compatible Schottky diode performance characteristics.

Substiute Parts

SK18

Diotec SemiconductorIn Stock: 20841SK18 Datasheet

Current PartRFQ

B180Q-13-F

Diodes IncorporatedIn Stock: 13379B180Q-13-F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SK18 are identified based on strict electrical and mechanical parameter matching within the Schottky diode category. The primary substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - DC Reverse (Vr) (Max): 80 V
• Current - Average Rectified (Io): 1 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Package / Case: DO-214AC, SMA

Mechanical Parameters (Must Match):

• Mounting Type: Surface Mount
• Package / Case: DO-214AC, SMA

The B180Q-13-F manufactured by Diodes Incorporated meets all core electrical and mechanical substitution criteria. This part maintains identical reverse voltage and rectified current ratings, equivalent fast recovery speed performance, and compatible SMA surface mount packaging. Forward voltage performance of the B180Q-13-F (790 mV @ 1 A) is superior to the SK18 (850 mV @ 1 A), representing an improvement in efficiency characteristics.

Parameter Comparison

Engineering Selection Recommendations

SK18 (Diotec Semiconductor): Select for applications where the standard Diotec supply chain is established and inventory is available. The SK18 maintains active product status with 20,815 pieces in stock. This part is suitable for general-purpose 80V/1A Schottky rectification applications within the specified -50°C to 150°C junction temperature range.

B180Q-13-F (Diodes Incorporated): Select as a direct substitute when Diodes Incorporated supply chain integration is preferred or when enhanced performance characteristics are beneficial. The B180Q-13-F provides superior forward voltage performance (790 mV versus 850 mV at 1A), extended operating temperature range (-65°C to 155°C), automotive-grade qualification (AEC-Q101), and ROHS3 compliance. This part is available with 13,323 pieces in stock and is supplied in Tape & Reel packaging. The B180Q-13-F is suitable for automotive and industrial applications requiring higher reliability standards.

Both parts are electrically and mechanically interchangeable for 80V/1A Schottky diode applications in DO-214AC (SMA) surface mount packages.

Frequently Asked Questions (FAQ)

Q: Can the B180Q-13-F replace the SK18 in existing designs?

A: Yes. The B180Q-13-F is a direct electrical and mechanical substitute for the SK18. Both parts share identical reverse voltage (80V), rectified current (1A), fast recovery speed characteristics, and DO-214AC (SMA) surface mount packaging. No circuit redesign is required.

Q: What is the difference in forward voltage between these parts?

A: The SK18 has a maximum forward voltage of 850 mV at 1A, while the B180Q-13-F has a maximum forward voltage of 790 mV at 1A. The B180Q-13-F exhibits lower forward voltage drop, resulting in reduced power dissipation and improved efficiency in rectification applications.

Q: Are there temperature range differences?

A: Yes. The SK18 operates from -50°C to 150°C junction temperature, while the B180Q-13-F operates from -65°C to 155°C. The B180Q-13-F provides an extended operating range, offering greater design margin for extreme temperature environments.

Q: What packaging formats are available?

A: The SK18 is supplied in standard packaging format. The B180Q-13-F is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly operations. Both parts use the DO-214AC (SMA) case package.

Q: Does the B180Q-13-F have any compliance certifications?

A: Yes. The B180Q-13-F is AEC-Q101 qualified for automotive applications, ROHS3 compliant, and REACH unaffected. The SK18 does not specify these certifications. The B180Q-13-F is suitable for automotive and industrial applications requiring higher reliability standards.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. Both parts use identical DO-214AC (SMA) surface mount packages and are compatible with standard pick-and-place assembly equipment and reflow soldering processes. No PCB layout modifications are required for substitution.