78C10SRAT DIP Switch SPST Equivalent & Substitute Parts

Part Overview

The 78C10SRAT is a 10-position DIP switch manufactured by Grayhill Inc., configured as a single-pole single-throw (SPST) switch with slide actuator and through-hole right-angle mounting. This component is rated for 25mA at 24VDC and features phosphor bronze contacts with gold finish. The product is currently obsolete, necessitating identification of equivalent and substitute components for ongoing design support and board-level replacement applications.

Substiute Parts

78C10SRAT

Grayhill Inc.In Stock: 110378C10SRAT Datasheet

Current PartRFQ

78B10SRAT

Grayhill Inc.In Stock: 95078B10SRAT Datasheet

DirectRFQ

KAS2110ET

E-SwitchIn Stock: 1142KAS2110ET Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 78C10SRAT is determined by the following critical parameters:

Electrical Compatibility Parameters:

• Circuit configuration (SPST)
• Number of positions (10)
• Voltage rating (minimum 24VDC)
• Current rating (minimum 25mA)
• Contact material and finish (phosphor bronze with gold finish preferred for signal integrity)

Mechanical Compatibility Parameters:

• Actuator type (slide standard)
• Mounting type (through hole, right angle)
• Pitch spacing (0.100" / 2.54mm)
• Height above board (0.390" / 9.90mm nominal)
• Termination style (PC pin)

Environmental & Compliance Parameters:

• Operating temperature range (minimum -20°C ~ 70°C)
• RoHS compliance status
• Moisture sensitivity level (MSL 1)

Substitute parts are classified into two categories:

Direct Manufacturer Substitute (78B10SRAT): Higher electrical ratings (150mA, 30VDC) with extended electrical life (10,000 cycles) and broader operating temperature range (-40°C ~ 85°C). Maintains identical mechanical form factor and pitch.

Similar Manufacturer Substitute (KAS2110ET): Equivalent electrical ratings (25mA, 24VDC) from alternative manufacturer (E-Switch) with identical mechanical mounting and pitch specifications. Extended operating temperature range (-40°C ~ 85°C) and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Ratings):

The KAS2110ET from E-Switch provides electrical and mechanical equivalence to the 78C10SRAT. Both components share identical current (25mA) and voltage (24VDC) ratings, SPST configuration, 10-position count, and 0.100" pitch spacing. The KAS2110ET is currently active in production with ROHS3 compliance and extended operating temperature range (-40°C ~ 85°C). Physical height above board is identical at 0.390" (9.90mm). This component is suitable for direct board-level substitution without circuit redesign.

For Enhanced Performance (Higher Electrical Ratings):

The 78B10SRAT from Grayhill Inc. offers superior electrical specifications with 150mA current rating and 30VDC voltage rating, compared to the 78C10SRAT's 25mA and 24VDC. The 78B10SRAT features extended electrical life (10,000 cycles versus 2,000 cycles) and broader operating temperature range (-40°C ~ 85°C). Mechanical form factor and pitch remain identical. This component is suitable for applications requiring higher electrical margins or extended operational life. Height above board is 0.380" (9.64mm), representing a 0.010" reduction.

Both substitute components maintain RoHS compliance and MSL 1 moisture sensitivity rating. Selection between direct equivalent (KAS2110ET) and enhanced performance (78B10SRAT) depends on circuit requirements and design margin specifications.

Frequently Asked Questions (FAQ)

Q: Can the 78B10SRAT replace the 78C10SRAT in existing designs?

A: Yes. The 78B10SRAT maintains identical mechanical mounting (through hole, right angle), pitch spacing (0.100"), and SPST 10-position configuration. The higher electrical ratings (150mA, 30VDC) are backward compatible with circuits designed for 25mA at 24VDC. Height above board differs by 0.010" (0.380" versus 0.390"), which is within typical PCB layout tolerances for DIP switch applications.

Q: What is the difference between the 78B10SRAT and KAS2110ET?

A: The 78B10SRAT and KAS2110ET differ in manufacturer (Grayhill Inc. versus E-Switch) and electrical ratings. The 78B10SRAT provides 150mA at 30VDC with 10,000-cycle electrical life. The KAS2110ET provides 25mA at 24VDC with 2,000-cycle electrical life, matching the original 78C10SRAT specifications. Contact material differs: 78B10SRAT uses copper alloy; KAS2110ET uses phosphor bronze. Both maintain identical mechanical form factor and pitch.

Q: Are there packaging differences between these components?

A: The 78C10SRAT and KAS2110ET packaging specifications are not detailed in the provided data. The 78B10SRAT is supplied in tube packaging. Verify packaging requirements with component suppliers for procurement and handling specifications.

Q: Which substitute is recommended for new designs?

A: Selection depends on electrical requirements. For applications requiring 25mA at 24VDC, the KAS2110ET provides direct electrical equivalence with active production status and ROHS3 compliance. For applications where higher electrical margins are beneficial, the 78B10SRAT offers superior ratings and extended electrical life while maintaining mechanical compatibility.

Q: Are all three components RoHS compliant?

A: Yes. The 78C10SRAT is RoHS Compliant. Both substitute components (78B10SRAT and KAS2110ET) are ROHS3 Compliant, representing current RoHS directive compliance standards.

Q: What is the operating temperature consideration for substitution?

A: The 78C10SRAT operates from -20°C to 70°C. Both substitute components extend this range to -40°C to 85°C, providing broader environmental operating capability. This extended range does not restrict substitution in applications within the original temperature specification.