78C10RAT DIP Switch SPST Equivalent & Substitute Parts

Part Overview

The 78C10RAT is a 10-position DIP switch manufactured by Grayhill Inc., configured as a single-pole single-throw (SPST) through-hole component with right-angle slide actuator. This part is rated for 25mA at 24VDC and features phosphor bronze contacts with gold finish. The 78C10RAT is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and procurement.

Substiute Parts

78C10RAT

Grayhill Inc.In Stock: 94878C10RAT Datasheet

Current PartRFQ

78B10RAT

Grayhill Inc.In Stock: 90278B10RAT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 78C10RAT is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Circuit configuration: SPST
• Number of positions: 10
• Mounting type: Through Hole, Right Angle
• Pitch: 0.100" (2.54mm)
• Actuator type: Slide (Standard)
• Termination style: PC Pin

Allowable Parameter Variations: The 78B10RAT qualifies as a direct substitute because it maintains identical circuit configuration, position count, mounting geometry, and pitch specifications. The 78B10RAT exhibits higher electrical ratings (150mA at 30VDC versus 25mA at 24VDC) and extended operating temperature range (-40°C ~ 85°C versus -20°C ~ 70°C), making it suitable for applications requiring the 78C10RAT's electrical and thermal specifications. The 78B10RAT also provides enhanced electrical life (10,000 cycles versus 2,000 cycles), representing improved reliability for equivalent or less demanding applications.

Parameter Comparison

Engineering Selection Recommendations

The 78B10RAT is the direct substitute for the obsolete 78C10RAT. Selection of the 78B10RAT is supported by the following factors:

Product Status: The 78B10RAT maintains active product status with Grayhill Inc., ensuring continued availability and manufacturing support. The 78C10RAT is obsolete, necessitating substitution for new designs and ongoing procurement.

Compliance Certifications: Both parts maintain REACH Unaffected status and unlimited moisture sensitivity level (MSL 1). The 78B10RAT achieves ROHS3 compliance, meeting current regulatory requirements. Both parts carry EAR99 ECCN classification and identical HTSUS codes (8536.50.9065).

Electrical and Thermal Margin: The 78B10RAT provides superior electrical ratings (150mA at 30VDC) compared to the 78C10RAT (25mA at 24VDC), offering design margin for applications operating at or near the original part's specifications. Extended operating temperature range (-40°C ~ 85°C) accommodates broader environmental conditions.

Reliability Enhancement: The 78B10RAT delivers 10,000 electrical life cycles versus 2,000 cycles for the 78C10RAT, representing a five-fold improvement in electrical endurance while maintaining identical mechanical life specifications.

Mechanical Compatibility: Identical pitch (0.100"), mounting type (through hole, right angle), and overall length (1.080") ensure direct PCB footprint compatibility. Height above board variation (0.380" versus 0.390") is within standard manufacturing tolerance and does not affect assembly or clearance requirements.

Frequently Asked Questions (FAQ)

Q: Can the 78B10RAT directly replace the 78C10RAT on existing PCBs?

A: Yes. The 78B10RAT maintains identical pitch (0.100"), mounting type (through hole, right angle), and length (1.080") specifications. The height above board difference (0.380" versus 0.390") is within standard tolerance and does not affect assembly compatibility or clearance.

Q: What are the key differences between the 78C10RAT and 78B10RAT?

A: The 78B10RAT provides higher electrical ratings (150mA at 30VDC versus 25mA at 24VDC), extended operating temperature range (-40°C ~ 85°C versus -20°C ~ 70°C), and significantly improved electrical life (10,000 cycles versus 2,000 cycles). Contact material differs (copper alloy versus phosphor bronze), though both maintain gold finish. The 78B10RAT is active product status while the 78C10RAT is obsolete.

Q: Are there any circuit design considerations when substituting the 78B10RAT for the 78C10RAT?

A: No circuit design changes are required. Both parts are SPST 10-position switches with identical circuit configuration and pitch. The 78B10RAT's higher current and voltage ratings provide additional design margin without requiring modification to existing circuits designed for the 78C10RAT.

Q: What is the packaging difference between these parts?

A: The 78C10RAT is supplied in standard packaging (not specified). The 78B10RAT is supplied in tube packaging. Tube packaging is standard for DIP switches and does not affect component functionality or PCB assembly compatibility.

Q: Are both parts RoHS compliant?

A: Yes. The 78C10RAT is RoHS Compliant. The 78B10RAT achieves ROHS3 Compliant status, meeting current regulatory requirements. Both parts maintain REACH Unaffected status.

Q: What is the mechanical life specification for both parts?

A: Both the 78C10RAT and 78B10RAT specify 2,000 mechanical life cycles. The 78B10RAT provides extended electrical life (10,000 cycles versus 2,000 cycles), which is the primary reliability distinction between the two parts.

Q: Can the 78B10RAT be used in applications requiring the exact operating temperature range of the 78C10RAT?

A: Yes. The 78B10RAT operating temperature range (-40°C ~ 85°C) encompasses the 78C10RAT range (-20°C ~ 70°C). Applications operating within the original -20°C ~ 70°C specification are fully supported by the 78B10RAT.