78C06SRAT DIP Switch Equivalent & Substitute Parts

Part Overview

The 78C06SRAT is a 6-position DIP switch manufactured by Grayhill Inc., configured as a single-pole single-throw (SPST) through-hole component with right-angle slide actuator. This switch is rated for 25mA at 24VDC and features phosphor bronze contacts with gold finish. The product is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

78C06SRAT

Grayhill Inc.In Stock: 109878C06SRAT Datasheet

Current PartRFQ

78B06SRAT

Grayhill Inc.In Stock: 104778B06SRAT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 78C06SRAT is determined by strict compatibility across the following critical parameters:

Mandatory Compatibility Criteria:

• Circuit configuration (SPST)
• Number of positions (6)
• Actuator type and level (Slide, Standard, Raised)
• Mounting type (Through Hole, Right Angle)
• Pitch spacing (0.100" / 2.54mm)
• Termination style (PC Pin)
• Contact finish (Gold)

Allowable Parameter Variations:

• Current rating may be equal to or greater than the original specification
• Voltage rating may be equal to or greater than the original specification
• Operating temperature range may be equal to or wider than the original specification
• Electrical and mechanical life ratings may be equal to or exceed the original specification
• Contact material may vary (phosphor bronze to copper alloy) provided gold finish is maintained
• Height above board may vary within manufacturing tolerances

The 78B06SRAT qualifies as a direct substitute based on these criteria, with enhanced electrical ratings and extended operational life.

Parameter Comparison

Engineering Selection Recommendations

The 78B06SRAT is a qualified substitute for the obsolete 78C06SRAT based on the following engineering factors:

Product Status Consideration: The 78C06SRAT is classified as obsolete, while the 78B06SRAT maintains active product status with current manufacturing support and documented inventory availability.

Compliance and Certification: Both components maintain RoHS compliance status. The 78B06SRAT carries ROHS3 certification, representing current regulatory alignment. Both components are REACH unaffected and carry identical ECCN and HTSUS classifications, ensuring regulatory equivalence.

Electrical Performance: The 78B06SRAT provides enhanced electrical ratings (150mA at 30VDC versus 25mA at 24VDC) and extended electrical life (10,000 cycles versus 2,000 cycles). These improvements ensure the substitute component operates within safe margins in the original application circuit.

Mechanical and Thermal Characteristics: Operating temperature range expansion (-40°C to 85°C versus -20°C to 70°C) provides broader environmental compatibility. Height variation (0.380" versus 0.390") remains within standard manufacturing tolerances and does not affect PCB layout or mechanical clearance.

Physical Compatibility: Identical pitch spacing, mounting type, termination style, and actuator configuration ensure direct mechanical and electrical interchangeability without PCB redesign or connector modification.

Frequently Asked Questions (FAQ)

Q: Can the 78B06SRAT be used as a direct replacement for the 78C06SRAT without circuit modification?

A: Yes. The 78B06SRAT maintains identical circuit configuration (SPST), position count (6), actuator type, mounting method, and pitch spacing. Enhanced electrical ratings and extended operating temperature range do not require circuit redesign. Direct substitution is supported.

Q: What is the significance of the higher current rating (150mA) on the 78B06SRAT compared to the original 25mA specification?

A: The substitute component is rated for higher current capacity, meaning it can safely handle the original 25mA application load with additional margin. This does not affect circuit operation but provides enhanced reliability and component longevity in the specified application.

Q: Are there packaging differences between these components?

A: The 78C06SRAT is supplied without specified packaging designation, while the 78B06SRAT is packaged in tube format. This difference affects procurement and handling procedures but does not impact electrical or mechanical performance in the final assembly.

Q: How do the contact materials differ, and does this affect substitution?

A: The 78C06SRAT uses phosphor bronze contacts while the 78B06SRAT uses copper alloy contacts. Both materials are gold-finished and provide equivalent electrical performance and contact reliability for the specified application parameters.

Q: What is the impact of the extended electrical life rating (10,000 cycles versus 2,000 cycles)?

A: The 78B06SRAT provides five times the electrical life specification, indicating enhanced durability and extended component service life. This represents an improvement over the original specification and does not create compatibility issues.

Q: Is the height difference (0.390" to 0.380") significant for PCB layout?

A: The 0.010" (0.26mm) height reduction is within standard manufacturing tolerances and does not affect PCB clearance, connector alignment, or mechanical assembly. No layout modification is required.

Q: Do both components meet current regulatory requirements?

A: Yes. Both components are RoHS compliant and REACH unaffected. The 78B06SRAT carries ROHS3 certification, representing current regulatory standards. Both components share identical ECCN and HTSUS classifications.