BDB09 Equivalent & Substitute Parts Reference

Part Overview

The BDB09 is a DIP switch manufactured by C&K, featuring a 9-position SPST configuration with slide actuator and through-hole mounting. This component is rated for 25mA at 25VDC and is designed for applications requiring reliable switching in compact form factors. The BDB09 is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.

Substiute Parts

BDB09

C&KIn Stock: 1019BDB09 Datasheet

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BD09

C&KIn Stock: 1810BD09 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BDB09 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST (Single Pole Single Throw)
• Number of Positions: Must be 9-position
• Actuator Type: Must be Slide (Standard) with Raised actuator level
• Mounting Type: Must be Through Hole with PC Pin termination
• Pitch: Must be 0.100" (2.54mm) Full
• Contact Material & Finish: Phosphor Bronze with Gold finish
• Mechanical & Electrical Life: Minimum 10,000 cycles

The BD09 meets all substitution criteria. While electrical ratings differ (100mA at 5VDC versus 25mA at 25VDC), the BD09 operates within the same mechanical and physical envelope, making it suitable for applications where the lower voltage and higher current capacity are compatible with the target circuit design.

Parameter Comparison

Engineering Selection Recommendations

The BD09 is the primary substitute for the BDB09. Both components share identical mechanical specifications, pitch, mounting configuration, and contact materials. The BD09 is currently in active production status, ensuring long-term availability and supply chain continuity.

The key difference between these parts is the electrical rating: the BD09 is rated for 100mA at 5VDC, compared to the BDB09's 25mA at 25VDC. Selection of the BD09 requires confirmation that the target application operates at 5VDC and that the 100mA current capacity is compatible with the circuit design. The BD09's higher current rating provides additional margin in low-voltage applications.

Both components are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification, meeting modern regulatory and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can the BD09 be used as a direct replacement for the BDB09?

A: The BD09 is mechanically and physically compatible with the BDB09. Both share identical 9-position SPST configuration, 0.100" pitch, through-hole mounting, and contact materials. Substitution is valid when the application circuit operates at 5VDC and the 100mA current capacity is acceptable.

Q: What are the main differences between BDB09 and BD09?

A: The primary differences are electrical ratings and product status. The BDB09 is rated 25mA at 25VDC and is obsolete. The BD09 is rated 100mA at 5VDC and is in active production. Physical dimensions and mechanical specifications are equivalent.

Q: Are there any height differences that affect PCB layout?

A: The BD09 has a height above board of 0.297" (7.54mm) compared to the BDB09's 0.274" (6.95mm). This 0.023" (0.59mm) difference is minimal and does not typically affect standard PCB layouts. Both components maintain the same length of 0.980" (24.89mm).

Q: Do both parts meet current compliance standards?

A: Both the BDB09 and BD09 are ROHS3 compliant. The BD09 additionally carries REACH Unaffected status. Both components have MSL 1 (Unlimited) moisture sensitivity classification.

Q: What is the packaging difference?

A: The BDB09 is supplied in standard packaging, while the BD09 is supplied in Tube packaging. This affects handling and storage but does not impact electrical or mechanical performance.