SK210A Schottky Diode 100V SMA Equivalent & Substitute Parts

Part Overview

The SK210A is an active-status Schottky rectifier diode manufactured by SMC Diode Solutions, rated for 100V DC reverse voltage in a surface mount SMA (DO-214AC) package. This component is designed for fast recovery applications requiring low forward voltage drop and rapid switching characteristics. Substitute parts are identified when equivalent electrical performance, package compatibility, and compliance certifications align with the original specification, enabling component procurement flexibility and supply chain continuity.

Substiute Parts

SK210A

SMC Diode SolutionsIn Stock: 35132SK210A Datasheet

Current PartRFQ

CDBA3100-HF

Comchip TechnologyIn Stock: 95488CDBA3100-HF Datasheet

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VSSA210-E3/5AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 5057VSSA210-E3/5AT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SK210A are qualified based on the following criteria:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 100 V
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Variation Parameters:

• Current - Average Rectified (Io): Substitutes may exceed the original specification
• Voltage - Forward (Vf) (Max) @ If: Substitutes with lower forward voltage are acceptable
• Current - Reverse Leakage @ Vr: Substitutes with lower leakage current are acceptable
• Capacitance @ Vr, F: Minor variations acceptable within fast recovery classification
• Operating Temperature - Junction: Substitutes with equal or wider temperature range are acceptable
• Compliance certifications (RoHS, REACH, MSL): Substitutes must maintain or exceed compliance status

The identified substitute parts CDBA3100-HF and VSSA210-E3/5AT meet all mandatory matching parameters and demonstrate equivalent or superior performance in allowable variation categories.

Parameter Comparison

Engineering Selection Recommendations

SK210A (SMC Diode Solutions)

• Primary choice when REACH Affected status is acceptable for the application
• Suitable for designs with established SMC supply chain relationships
• Active product status ensures continued availability

CDBA3100-HF (Comchip Technology)

• Qualified substitute with higher current rating (3A vs. unspecified for SK210A)
• REACH Unaffected status provides regulatory advantage in restricted substance applications
• Equivalent reverse leakage current (500 µA @ 100 V)
• Slightly lower forward voltage (810 mV @ 3A) improves thermal efficiency
• Narrower operating temperature range (-50°C to 150°C) requires verification for extreme cold applications
• Higher inventory availability (95,413 pcs) supports procurement continuity

VSSA210-E3/5AT (Vishay General Semiconductor - Diodes Division)

• Qualified substitute with superior reverse leakage performance (150 µA @ 100 V vs. 500 µA)
• REACH Unaffected status provides regulatory advantage
• Lower forward voltage (700 mV @ 2A) reduces power dissipation
• Lower capacitance (175 pF @ 4V) benefits high-frequency switching applications
• Narrower operating temperature range (-40°C to 150°C) requires verification for extreme cold applications
• Lower inventory availability (5,015 pcs) may impact procurement lead times

All three parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can CDBA3100-HF or VSSA210-E3/5AT be used as direct replacements for SK210A in existing designs?

A: Yes, both substitute parts are qualified for direct replacement based on matching voltage rating (100V), package type (DO-214AC/SMA), mounting method (surface mount), and fast recovery Schottky technology. No PCB layout modifications are required. However, the narrower operating temperature ranges of the substitutes (-50°C and -40°C minimum, respectively, versus -55°C for SK210A) must be evaluated against application requirements.

Q: What are the performance differences between the substitute parts?

A: CDBA3100-HF provides higher current capacity (3A) and equivalent reverse leakage (500 µA @ 100V). VSSA210-E3/5AT offers superior reverse leakage performance (150 µA @ 100V) and lower forward voltage (700 mV @ 2A), resulting in reduced power dissipation. Both substitutes demonstrate lower forward voltage than the original SK210A, improving thermal efficiency.

Q: Are there compliance or regulatory differences between these parts?

A: SK210A carries REACH Affected status, while both CDBA3100-HF and VSSA210-E3/5AT are REACH Unaffected. All three parts are ROHS3 compliant with MSL 1 (Unlimited) rating. Applications subject to REACH restrictions should prioritize the Comchip or Vishay alternatives.

Q: How do the capacitance specifications affect circuit performance?

A: Capacitance differences (240 pF for SK210A, 250 pF for CDBA3100-HF, 175 pF for VSSA210-E3/5AT) are minor and within the fast recovery Schottky classification. VSSA210-E3/5AT's lower capacitance may provide marginal benefits in high-frequency switching applications, but substitution decisions should not be based solely on this parameter.

Q: What is the significance of the current rating difference?

A: SK210A does not specify an average rectified current (Io) rating. CDBA3100-HF (3A) and VSSA210-E3/5AT (1.7A) both provide defined current ratings. If the application requires current handling above 1.7A, CDBA3100-HF is the appropriate choice. For applications below 1.7A, both substitutes are suitable.

Q: Are there inventory or lead time considerations?

A: CDBA3100-HF has significantly higher inventory (95,413 pcs) compared to VSSA210-E3/5AT (5,015 pcs), potentially affecting procurement lead times. SK210A maintains 35,100 pcs in stock. Inventory levels should be confirmed with suppliers for time-sensitive applications.

Q: Can these parts be used interchangeably in the same production batch?

A: All three parts are qualified substitutes with identical package and mounting specifications. However, design documentation and bill of materials should specify the selected part number to maintain traceability and ensure consistent performance characteristics across production runs.