BDB12 DIP Switch - Equivalent & Substitute Parts

Part Overview

The BDB12 is a 12-position DIP switch manufactured by C&K, designed for through-hole mounting applications requiring SPST (Single Pole Single Throw) switching functionality. This component features a slide actuator with raised profile, phosphor bronze contacts finished in gold, and is rated for 25mA at 25VDC operation across a temperature range of -40°C to 85°C.

The BDB12 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and repairs.

Substiute Parts

BDB12

C&KIn Stock: 2652BDB12 Datasheet

Current PartRFQ

BD12

C&KIn Stock: 2032BD12 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BDB12 is determined by the following critical parameters:

• Circuit Configuration: SPST topology must be maintained
• Position Count: 12-position requirement must be preserved
• Mounting Interface: Through-hole mounting with 0.100" (2.54mm) pitch is mandatory
• Actuator Mechanism: Slide actuator with raised profile ensures mechanical compatibility
• Contact Material and Finish: Phosphor bronze with gold finish provides electrical performance baseline
• Operating Temperature Range: -40°C to 85°C operational envelope
• Mechanical and Electrical Life: 10,000 cycles minimum durability specification
• Compliance: ROHS3 compliance required

The BD12 substitute part maintains all critical mechanical and electrical parameters while operating at different voltage and current ratings (5VDC, 100mA versus 25VDC, 25mA). This substitution is valid when the application circuit operates within the BD12 electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The BD12 is the direct substitute for the obsolete BDB12. Both components are manufactured by C&K and share identical mechanical specifications, circuit topology, and position count. The BD12 carries Active product status, ensuring ongoing availability and supply chain support.

Selection of the BD12 as a replacement is appropriate when the application circuit operates within 5VDC and 100mA specifications. The BD12 provides higher current capacity (100mA versus 25mA) and operates at lower voltage (5VDC versus 25VDC), making it suitable for modern low-voltage digital logic applications.

Both parts maintain ROHS3 compliance and identical mechanical life ratings (10,000 cycles). The BD12 body material is polybutylene terephthalate (PBT) glass-filled, compared to the BDB12 polyamide (PA46) nylon 4/6 composition. Both materials provide equivalent mechanical durability and environmental resistance for through-hole PCB mounting.

Frequently Asked Questions (FAQ)

Q: Can the BD12 directly replace the BDB12 in all applications?

A: Direct replacement is valid only when the application circuit operates within BD12 electrical specifications: 5VDC maximum and 100mA maximum current. If the original design requires 25VDC or operates above 100mA, the BD12 is not suitable without circuit modification.

Q: What are the mechanical compatibility considerations?

A: Both parts feature identical 12-position SPST configuration, 0.100" (2.54mm) pitch, through-hole PC pin termination, and 1.280" (32.51mm) length. The BD12 height above board is 0.297" (7.54mm) compared to BDB12 at 0.274" (6.95mm), a difference of 0.023" (0.59mm). This minor height variation is typically accommodated in standard PCB designs with adequate clearance.

Q: Are there compliance or certification differences?

A: Both the BDB12 and BD12 are ROHS3 compliant. The BD12 includes REACH Unaffected status. Both components carry EAR99 ECCN classification and identical HTSUS codes (8536.50.9065).

Q: What is the significance of the product status difference?

A: The BDB12 is Obsolete, indicating C&K no longer manufactures or supports this part. The BD12 is Active, meaning it is currently produced and supported by the manufacturer. For new designs or long-term supply requirements, the BD12 is the recommended choice.

Q: How do the contact materials compare?

A: Both parts use phosphor bronze contacts with gold finish, ensuring equivalent electrical performance and reliability for low-voltage switching applications.