1N6263 BK Schottky Diode Equivalent & Substitute Parts

Part Overview

The 1N6263 BK is a through-hole Schottky diode manufactured by Central Semiconductor Corp, rated for 60 V DC reverse voltage and 15 mA average rectified current in a DO-35 axial package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The small signal Schottky technology enables fast switching characteristics suitable for low-voltage rectification and signal detection applications.

Substiute Parts

1N6263 BK

Central Semiconductor CorpIn Stock: 10761N6263 BK Datasheet

Current PartRFQ

CMDD6263 BK

Central Semiconductor CorpIn Stock: 965CMDD6263 BK Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N6263 BK is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) rating must equal or exceed 60 V
• Current - Average Rectified (Io) must equal or exceed 15 mA
• Technology classification must be Schottky
• Reverse leakage current must not exceed specified limits
• Forward voltage characteristics must be compatible with circuit operation

Mechanical Compatibility Criteria:

• Mounting type conversion from through-hole to surface mount is permissible when electrical parameters are met
• Package form factor changes require circuit board redesign consideration

The CMDD6263 BK qualifies as a functional substitute based on superior voltage rating (70 V), matching current rating (15 mA), identical Schottky technology, and equivalent reverse leakage characteristics. The transition from DO-35 through-hole to SOD-323 surface-mount packaging represents a mechanical change requiring board layout modification but does not affect electrical performance within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

The CMDD6263 BK serves as a direct electrical substitute for the obsolete 1N6263 BK. The substitute part offers improved voltage margin (70 V versus 60 V), maintains identical current and leakage specifications, and carries active product status ensuring continued availability and manufacturing support.

The primary design consideration is the transition from through-hole DO-35 to surface-mount SOD-323 packaging. This change requires circuit board redesign and assembly process modification but does not compromise electrical performance. The CMDD6263 BK operates within a reduced maximum junction temperature range (-65°C to 150°C versus -65°C to 200°C), which must be evaluated against specific application thermal requirements.

Both components carry identical ECCN (EAR99) and HTSUS (8541.10.0070) classifications, confirming regulatory equivalence. The CMDD6263 BK includes REACH Unaffected status, providing additional compliance documentation for regulated supply chains.

Frequently Asked Questions (FAQ)

Q: Can the CMDD6263 BK directly replace the 1N6263 BK without circuit modification?

A: Electrical substitution is valid. The CMDD6263 BK meets or exceeds all critical electrical parameters: 70 V reverse voltage rating (versus 60 V), 15 mA current rating (matching), and identical reverse leakage characteristics. However, the package change from DO-35 through-hole to SOD-323 surface-mount requires circuit board redesign and assembly process changes.

Q: What are the key electrical differences between these parts?

A: The CMDD6263 BK provides higher reverse voltage rating (70 V versus 60 V), offering improved overvoltage margin. Forward voltage characteristics differ due to measurement conditions (410 mV @ 1 mA versus 1 V @ 15 mA), but both are consistent with Schottky diode behavior. Reverse leakage and capacitance are equivalent.

Q: Does the maximum junction temperature difference affect substitution suitability?

A: The CMDD6263 BK maximum junction temperature of 150°C is lower than the 1N6263 BK specification of 200°C. Applications operating near or above 150°C junction temperature require thermal analysis to confirm the substitute part remains within safe operating limits.

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

A: Both parts carry identical ECCN and HTSUS classifications. The CMDD6263 BK includes REACH Unaffected status, providing additional environmental compliance documentation. No regulatory barriers exist to substitution.

Q: What is the significance of the reverse recovery time specification for the CMDD6263 BK?

A: The CMDD6263 BK specifies 5 ns reverse recovery time, indicating fast switching characteristics typical of modern Schottky diodes. The 1N6263 BK does not provide this specification. Faster recovery time generally improves switching performance in high-frequency applications.

Q: How does the capacitance difference impact circuit performance?

A: The capacitance values are nearly identical (2.2 pF versus 2 pF at 0V, 1MHz), representing negligible difference. Both values are typical for small-signal Schottky diodes and do not significantly affect circuit behavior in most applications.