BD05AV2 Equivalent & Substitute Parts

Part Overview

The BD05AV2 is a DIP slide switch manufactured by C&K, featuring SPST (Single Pole Single Throw) configuration with 5 positions, rated for 100mA at 5VDC. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and production continuity. Substitute parts must maintain functional compatibility across electrical ratings, mechanical dimensions, and circuit performance characteristics.

Key Parameters

Parameter	BD05AV2 Specification
Circuit Configuration	SPST
Number of Positions	5
Current Rating	100mA
Voltage Rating	5VDC
Actuator Type	Slide (Standard), Raised
Mounting Type	Through Hole, Right Angle
Pitch	0.100" (2.54mm)
Contact Material	Phosphor Bronze with Gold Finish
Operating Temperature Range	-40°C to 85°C
Mechanical Life	10,000 Cycles
Electrical Life	10,000 Cycles
RoHS Status	RoHS Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters: circuit configuration (SPST), number of positions (5), mounting type (Through Hole, Right Angle), pitch (0.100"), contact material (Phosphor Bronze with Gold finish), operating temperature range (-40°C to 85°C), and environmental compliance (RoHS, REACH).

The substitute parts are grouped into two categories based on electrical rating compatibility:

Category 1 - Direct Electrical Equivalent: BD05AV maintains identical electrical specifications (100mA at 5VDC) with all mechanical and material parameters matching the BD05AV2. The primary distinction is product status (Active vs. Obsolete) and packaging format.

Category 2 - Functional Equivalent with Derating: KAS2105E and KAS2105ET are E-Switch alternatives with reduced electrical ratings (25mA at 24VDC). These parts maintain mechanical compatibility and identical circuit configuration but require application-level voltage and current derating analysis.

Parameter Comparison

Parameter	BD05AV2	BD05AV	KAS2105E	KAS2105ET
Manufacturer	C&K	C&K	E-Switch	E-Switch
Circuit	SPST	SPST	SPST	SPST
Positions	5	5	5	5
Current Rating	100mA	100mA	25mA	25mA
Voltage Rating	5VDC	5VDC	24VDC	24VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)	Slide (Standard)
Actuator Level	Raised	Raised	Raised	Raised
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Material	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze
Contact Finish	Gold	Gold	Gold	Gold
Height Above Board	0.380" (9.64mm)	0.380" (9.64mm)	0.390" (9.90mm)	0.390" (9.90mm)
Length	0.580" (14.73mm)	0.580" (14.73mm)	0.554" (14.06mm)	0.554" (14.06mm)
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Mechanical Life	10,000 Cycles	10,000 Cycles	2,000 Cycles	2,000 Cycles
Electrical Life	10,000 Cycles	10,000 Cycles	2,000 Cycles	2,000 Cycles
Washable	Yes	Yes	No	Yes
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

BD05AV (C&K): This part is the primary substitute for BD05AV2. It maintains identical electrical specifications (100mA at 5VDC), mechanical configuration, and material composition. The part is currently active in production with ROHS3 compliance certification. Selection of BD05AV eliminates all electrical and mechanical derating requirements and provides direct form-fit-function compatibility.

KAS2105E and KAS2105ET (E-Switch): These alternatives are suitable only for applications where the circuit design accommodates 24VDC operation and 25mA current limitation. Both parts maintain mechanical compatibility and SPST configuration but operate at different electrical parameters. KAS2105ET includes tape seal features and washable characteristics, while KAS2105E does not provide washable functionality. Both parts exhibit reduced mechanical and electrical life ratings (2,000 cycles versus 10,000 cycles).

Frequently Asked Questions (FAQ)

Q: Can BD05AV directly replace BD05AV2 in existing designs? A: Yes. BD05AV provides direct electrical and mechanical compatibility with identical current rating (100mA), voltage rating (5VDC), circuit configuration (SPST), and physical dimensions. No design modifications are required.

Q: What are the limitations of using KAS2105E or KAS2105ET as substitutes? A: These parts operate at 24VDC with 25mA current rating, requiring circuit-level voltage and current derating. Mechanical and electrical life cycles are reduced to 2,000 cycles compared to 10,000 cycles for the original part. KAS2105E lacks washable capability.

Q: Are there packaging differences between substitute parts? A: BD05AV2 is supplied in standard packaging, while BD05AV and both KAS alternatives are supplied in tube packaging. This affects handling and storage procedures but does not impact electrical or mechanical performance.

Q: Do all substitute parts meet RoHS compliance? A: Yes. BD05AV carries ROHS3 certification, and both KAS2105E and KAS2105ET carry ROHS3 certification. All parts are REACH unaffected and carry EAR99 ECCN classification.

Q: What is the mechanical life difference between BD05AV and KAS alternatives? A: BD05AV maintains 10,000 mechanical and electrical cycles, matching the original BD05AV2. KAS2105E and KAS2105ET are rated for 2,000 cycles, requiring application-level cycle analysis for high-frequency switching applications.

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