BDB05 DIP Switch - Equivalent & Substitute Parts

Part Overview

The BDB05 is a DIP switch manufactured by C&K, featuring a 5-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 BDB05 is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

BDB05

C&KIn Stock: 1114BDB05 Datasheet

Current PartRFQ

BD05

C&KIn Stock: 2378BD05 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BDB05 is based on the following critical parameters that must remain consistent or be compatible with the original application:

• Circuit Configuration: SPST topology must be maintained
• Number of Positions: 5-position requirement
• Mounting Interface: Through-hole with 0.100" (2.54mm) pitch
• Actuator Mechanism: Slide-type actuator with raised profile
• Contact Material and Finish: Phosphor bronze with gold plating for reliability
• Environmental Compliance: RoHS3 compliance and MSL rating

The BD05 substitute part maintains all critical mechanical and electrical interface parameters while offering enhanced electrical performance characteristics suitable for modern applications.

Parameter Comparison

Engineering Selection Recommendations

The BD05 serves as a direct functional substitute for the obsolete BDB05 based on the following engineering criteria:

Mechanical Compatibility: Both parts share identical mounting interfaces, pitch spacing (0.100"), and actuator profiles. The BD05 height variance of 0.023" above board requires verification against enclosure clearance specifications but does not affect electrical performance or PCB layout compatibility.

Electrical Performance: The BD05 provides enhanced electrical ratings (100mA at 5VDC) compared to the BDB05 (25mA at 25VDC). Applications operating within the BD05 voltage specification (5VDC maximum) will experience improved current handling capacity. Applications requiring the full 25VDC rating of the BDB05 must confirm that the BD05 5VDC maximum rating is compatible with system design.

Regulatory and Compliance Status: Both components maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing and environmental standards. The BD05 active product status ensures long-term availability and supply chain continuity compared to the obsolete BDB05.

Body Material Difference: The BDB05 uses Polyamide (PA46) Nylon 4/6, while the BD05 uses Polybutylene Terephthalate (PBT) Glass Filled. The PBT material in BD05 provides enhanced mechanical and thermal stability, supporting the higher current rating.

Frequently Asked Questions (FAQ)

Q: Can the BD05 directly replace the BDB05 in all applications?

A: Mechanical and interface compatibility is confirmed. Electrical compatibility depends on application voltage requirements. If your circuit operates at 5VDC or below, the BD05 is a direct substitute. If your application requires 25VDC operation, the BD05 5VDC maximum rating is not suitable.

Q: What is the significance of the 0.023" height difference between BDB05 and BD05?

A: The BD05 is 0.023" taller (0.297" vs 0.274" above board). This difference must be verified against PCB assembly clearance specifications, enclosure height constraints, and any mechanical interference with adjacent components or covers.

Q: Are the contact materials equivalent between BDB05 and BD05?

A: Yes. Both parts use phosphor bronze contacts with gold plating, ensuring equivalent electrical performance, reliability, and corrosion resistance.

Q: What does the change from Nylon 4/6 to PBT Glass Filled material mean for reliability?

A: PBT Glass Filled material provides superior mechanical strength, dimensional stability, and thermal performance compared to Nylon 4/6. This material upgrade supports the higher current rating (100mA vs 25mA) and enhances long-term reliability under thermal cycling.

Q: Is the BD05 available in the same packaging as the BDB05?

A: The BDB05 was supplied in standard DIP packaging. The BD05 is supplied in Tube packaging. Verify that tube packaging is compatible with your assembly and handling processes.

Q: Do both parts meet current environmental and regulatory standards?

A: Yes. Both BDB05 and BD05 are ROHS3 compliant with MSL Level 1 rating. The BD05 active product status ensures ongoing compliance with evolving regulatory requirements.