BPA07SK Equivalent & Substitute Parts

Part Overview

The BPA07SK is a 7-position DIP switch manufactured by C&K, featuring a piano actuator with SPST (Single Pole Single Throw) circuit configuration. This surface mount component is rated for 100mA at 5VDC and is designed for applications requiring compact, reliable switching functionality. The BPA07SK is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	BPA07SK
Manufacturer	C&K
Circuit Configuration	SPST
Number of Positions	7
Current Rating	100mA
Voltage Rating	5VDC
Actuator Type	Piano, Raised
Mounting Type	Surface Mount, Right Angle
Pitch	0.100" (2.54mm)
Height Above Board	0.274" (6.95mm)
Termination Style	Gull Wing
Contact Material	Phosphor Bronze
Contact Finish	Tin
Operating Temperature Range	-20°C to 85°C
Product Status	Obsolete
RoHS Status	Non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the BPA07SK is determined by the following critical parameters:

Circuit Configuration: Must be SPST to maintain identical switching behavior
Number of Positions: Must be 7 to ensure PCB footprint compatibility
Mounting Type: Must be Surface Mount, Right Angle to fit existing board layouts
Pitch: Must be 0.100" (2.54mm) for pad alignment
Termination Style: Must be Gull Wing for solder compatibility
Actuator Type: Must be Piano to preserve user interface consistency

The 193-7MS from CTS Electrocomponents meets all structural and mechanical compatibility requirements. While electrical ratings differ (50mA at 24VDC versus 100mA at 5VDC), this component functions as a direct substitute in applications where the lower current rating and higher voltage specification are acceptable within the system design parameters.

Parameter Comparison

Parameter	BPA07SK (C&K)	193-7MS (CTS Electrocomponents)
Circuit Configuration	SPST	SPST
Number of Positions	7	7
Actuator Type	Piano, Raised	Piano, Raised
Mounting Type	Surface Mount, Right Angle	Surface Mount, Right Angle
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Height Above Board	0.274" (6.95mm)	0.359" (9.12mm)
Termination Style	Gull Wing	Gull Wing
Operating Temperature Range	-20°C to 85°C	-40°C to 85°C
Current Rating	100mA	50mA
Voltage Rating	5VDC	24VDC
Electrical Life	1,000 Cycles	7,000 Cycles
RoHS Status	Non-compliant	ROHS3 Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

The 193-7MS is the identified substitute for the BPA07SK based on mechanical and electrical compatibility within defined system parameters. Key considerations for selection:

Product Status: The 193-7MS maintains active production status, ensuring long-term availability and supply chain stability compared to the obsolete BPA07SK.

Compliance: The 193-7MS is ROHS3 compliant, addressing regulatory requirements that the BPA07SK does not meet. This is significant for applications subject to RoHS directives.

Electrical Characteristics: The 193-7MS operates at 24VDC with a 50mA current rating, compared to the BPA07SK's 5VDC/100mA specification. System designs must confirm that the substitute's electrical parameters align with circuit requirements.

Mechanical Compatibility: Both components share identical pitch (0.100"), termination style (Gull Wing), and mounting configuration (Surface Mount, Right Angle). The 193-7MS has a slightly increased height above board (0.359" versus 0.274"), which must be verified against PCB clearance constraints.

Operational Life: The 193-7MS provides extended electrical life (7,000 cycles versus 1,000 cycles), offering improved reliability for high-cycle applications.

Frequently Asked Questions (FAQ)

Q: Can the 193-7MS be used as a direct drop-in replacement for the BPA07SK?

A: The 193-7MS is mechanically compatible with the BPA07SK footprint due to matching pitch, termination style, and mounting configuration. However, the increased height above board (0.359" versus 0.274") must be verified against available PCB clearance. Electrical parameter differences (24VDC/50mA versus 5VDC/100mA) require circuit-level validation.

Q: What are the key differences between these two components?

A: The primary differences are voltage rating (24VDC versus 5VDC), current rating (50mA versus 100mA), electrical life (7,000 cycles versus 1,000 cycles), and product status (active versus obsolete). The 193-7MS also provides ROHS3 compliance, which the BPA07SK does not.

Q: Are there any packaging differences?

A: The BPA07SK is supplied in standard packaging, while the 193-7MS is packaged in tubes. This affects handling and storage procedures but does not impact functional compatibility.

Q: What should be verified before implementing the 193-7MS as a substitute?

A: Confirm that the system circuit operates at 24VDC or can accommodate this voltage level. Verify that the 50mA current rating is sufficient for the application. Check PCB clearance for the increased component height. Validate that the extended electrical life (7,000 cycles) meets or exceeds application requirements.

Q: Is the 193-7MS suitable for applications requiring 5VDC operation?

A: The 193-7MS is rated for 24VDC operation. Use in 5VDC systems requires circuit redesign or voltage regulation to match the component's specifications.

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