Grayhill 78RB02S DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 78RB02S is a slide-actuated DIP switch with SPST (Single Pole Single Throw) configuration, rated for 150mA at 30VDC. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The 78RB02S features through-hole mounting with gold-plated copper alloy contacts, designed for applications requiring reliable switching in compact form factors.

Substiute Parts

78RB02S

Grayhill Inc.In Stock: 73978RB02S Datasheet

Current PartRFQ

78RB02ST

Grayhill Inc.In Stock: 585878RB02ST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 78RB02S is determined by strict equivalence across the following electrical and mechanical parameters:

• Circuit topology: SPST configuration with 2-position switching
• Electrical ratings: 150mA current capacity and 30VDC voltage rating
• Physical form factor: Through-hole mounting with 0.100" pitch and 0.265" height above board
• Contact specifications: Copper alloy with gold finish for reliable signal integrity
• Environmental performance: Operating temperature range of -40°C to 85°C and mechanical/electrical life of 2,000 cycles

The Grayhill 78RB02ST meets all these criteria and qualifies as a direct substitute for the obsolete 78RB02S.

Parameter Comparison

Engineering Selection Recommendations

The 78RB02ST is the direct substitute for the obsolete 78RB02S. Both components share identical electrical ratings, mechanical dimensions, and functional specifications. The primary distinction is product status and regulatory compliance:

• 78RB02S: Obsolete status with RoHS non-compliant designation
• 78RB02ST: Active product status with ROHS3 compliance

For new designs or ongoing procurement, the 78RB02ST is the appropriate selection. This part maintains full electrical and mechanical compatibility while offering active manufacturer support and compliance with current regulatory requirements. Both components carry identical REACH and ECCN classifications, confirming their functional equivalence for export and supply chain purposes.

Frequently Asked Questions (FAQ)

Q: Can the 78RB02ST directly replace the 78RB02S in existing designs?

A: Yes. The 78RB02ST provides complete functional equivalence. All electrical parameters (150mA, 30VDC, SPST), mechanical dimensions (0.265" height, 0.100" pitch), and contact specifications (gold-plated copper alloy) are identical. No circuit modifications are required.

Q: What is the difference between the 78RB02S and 78RB02ST?

A: The primary differences are product status and regulatory compliance. The 78RB02S is obsolete and RoHS non-compliant, while the 78RB02ST is an active product with ROHS3 compliance. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: The 78RB02S is supplied in standard packaging, while the 78RB02ST is supplied in tube packaging. This packaging difference does not affect component performance or compatibility.

Q: What is the operating temperature range for both parts?

A: Both the 78RB02S and 78RB02ST operate across -40°C to 85°C, providing equivalent thermal performance for industrial and commercial applications.

Q: Are both parts washable?

A: Yes. Both the 78RB02S and 78RB02ST are washable components with tape seal features, supporting standard PCB cleaning processes.

Q: What is the mechanical and electrical life expectancy?

A: Both components are rated for 2,000 mechanical cycles and 2,000 electrical cycles, providing equivalent reliability and service life.

Q: Do these parts have moisture sensitivity concerns?

A: No. Both components carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity limitations for storage or handling.