Equivalent & Substitute Parts for 78C02SRAT

Part Overview

The 78C02SRAT is a DIP slide switch manufactured by Grayhill Inc., configured as a single-pole single-throw (SPST) switch with 2 positions. This component is rated for 25mA at 24VDC and features a through-hole, right-angle mounting configuration with a raised slide actuator. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

78C02SRAT

Grayhill Inc.In Stock: 75578C02SRAT Datasheet

Current PartRFQ

78B02SRAT

Grayhill Inc.In Stock: 105678B02SRAT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 78C02SRAT is determined by compatibility across the following critical parameters:

Mandatory Compatibility Parameters:

• Circuit configuration (SPST)
• Number of positions (2)
• Mounting type (Through Hole, Right Angle)
• Actuator type (Slide Standard)
• Pitch spacing (0.100" / 2.54mm)
• Termination style (PC Pin)

Allowable Parameter Variations: Substitute parts may exceed the original electrical ratings (current and voltage) while maintaining the same mechanical form factor and circuit topology. The 78B02SRAT meets all mandatory compatibility criteria while providing enhanced electrical performance specifications.

Parameter Comparison

Engineering Selection Recommendations

The 78B02SRAT is a direct substitute for the obsolete 78C02SRAT. Both components share identical mechanical form factors, circuit topology, and mounting characteristics. The 78B02SRAT maintains active product status with Grayhill Inc., ensuring continued availability and supply chain reliability.

The substitute part provides enhanced electrical performance with higher current (150mA versus 25mA) and voltage (30VDC versus 24VDC) ratings, making it suitable for applications requiring the original specifications while offering additional design margin. The extended operating temperature range (-40°C to 85°C versus -20°C to 70°C) and increased electrical life (10,000 cycles versus 2,000 cycles) provide improved reliability characteristics.

Both components maintain identical compliance certifications: RoHS compliance, REACH unaffected status, and EAR99 export classification. The 78B02SRAT carries ROHS3 compliance, representing current regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the 78B02SRAT be used as a direct replacement for the 78C02SRAT in existing designs?

A: Yes. The 78B02SRAT maintains identical mechanical dimensions, mounting configuration, pitch spacing, and circuit topology. The component fits the same PCB footprint and operates with the same actuator interface. The enhanced electrical ratings do not create compatibility issues in applications originally designed for the 78C02SRAT.

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

A: The primary differences are electrical performance and product status. The 78B02SRAT provides higher current capacity (150mA versus 25mA), higher voltage rating (30VDC versus 24VDC), extended temperature range (-40°C to 85°C versus -20°C to 70°C), and increased electrical life (10,000 cycles versus 2,000 cycles). The 78B02SRAT is currently active, while the 78C02SRAT is obsolete.

Q: Are there packaging differences between these parts?

A: The 78C02SRAT is supplied with tape seal packaging. The 78B02SRAT is supplied in tube packaging. Both packaging formats are standard for DIP switches and do not affect component functionality or PCB integration.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both components are RoHS compliant and REACH unaffected. The 78B02SRAT carries ROHS3 compliance, representing alignment with current regulatory standards. Both parts share identical ECCN (EAR99) and HTSUS (8536.50.9065) classifications.

Q: What is the mechanical life difference, and does it matter?

A: Both parts specify 2,000 mechanical cycles. However, the 78B02SRAT provides 10,000 electrical cycles compared to 2,000 for the 78C02SRAT. This extended electrical life indicates improved contact durability and reliability in switching applications.

Q: Are the contact materials compatible?

A: Both parts feature gold-plated contacts. The 78C02SRAT uses phosphor bronze base material, while the 78B02SRAT uses copper alloy. Both materials with gold plating provide reliable electrical contact and are suitable for the specified voltage and current ranges.