Grayhill 78B07S DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 78B07S is a 7-position DIP switch with SPST circuit configuration, rated for 150mA at 30VDC. This component features a slide actuator with raised level, gold-plated copper alloy contacts, and through-hole PC pin termination. The 78B07S is classified as obsolete product status, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substitution becomes necessary when the original part reaches end-of-life status or when design requirements allow for compatible alternatives that meet or exceed the electrical and mechanical specifications of the original component.

Substiute Parts

78B07S

Grayhill Inc.In Stock: 90978B07S Datasheet

Current PartRFQ

78B07ST

Grayhill Inc.In Stock: 161878B07ST Datasheet

DirectRFQ

206-7ST

CTS ElectrocomponentsIn Stock: 3226206-7ST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the 78B07S is based on the following critical parameters that must remain constant or be exceeded:

Mandatory Matching Parameters:

• Circuit configuration: SPST
• Number of positions: 7
• Mounting type: Through Hole
• Pitch: 0.100" (2.54mm)
• Actuator type: Slide (Standard)
• Contact finish: Gold

Allowable Parameter Variations:

• Current rating may be equal to or greater than 150mA
• Voltage rating may be equal to or greater than 30VDC
• Operating temperature range may be equal to or wider than -40°C to 85°C
• Mechanical and electrical life ratings may be equal to or exceed 2,000 cycles
• RoHS compliance status may differ from the original part

Two substitute parts meet these criteria with specific trade-offs documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

78B07ST (Grayhill Inc.) - Primary Substitute

The 78B07ST is the direct successor to the 78B07S within the Grayhill 78 series. This part maintains identical electrical ratings (150mA, 30VDC), mechanical dimensions, and circuit configuration. The 78B07ST is classified as active product status with ROHS3 compliance, providing long-term availability and regulatory alignment. The transition from the obsolete 78B07S to the 78B07ST requires no circuit redesign and presents no compatibility concerns. This substitute is recommended as the primary replacement option.

206-7ST (CTS Electrocomponents) - Conditional Substitute

The 206-7ST from CTS Electrocomponents provides a cross-manufacturer alternative with identical circuit configuration, position count, and mounting characteristics. However, this part operates at reduced electrical ratings: 50mA current (versus 150mA) and 24VDC (versus 30VDC). The 206-7ST is suitable only for applications where the circuit current does not exceed 50mA and operating voltage does not exceed 24VDC. The 206-7ST offers extended electrical life (10,000 cycles versus 2,000 cycles) and wider operating temperature range (-55°C to 85°C). This substitute is applicable only when design specifications permit the reduced electrical ratings.

Frequently Asked Questions (FAQ)

Q: Can the 78B07ST be used as a direct replacement for the 78B07S without circuit modification?

A: Yes. The 78B07ST maintains identical electrical ratings, mechanical dimensions, pitch, and circuit configuration. No circuit redesign is required for substitution.

Q: What are the limitations of using the 206-7ST as a substitute?

A: The 206-7ST has reduced current rating (50mA versus 150mA) and voltage rating (24VDC versus 30VDC). It is suitable only for applications operating within these lower electrical parameters. Verify that your circuit current does not exceed 50mA and operating voltage does not exceed 24VDC before selecting this substitute.

Q: Does the height difference between the 78B07S and 206-7ST affect PCB layout compatibility?

A: The 206-7ST has a height of 0.334" (8.48mm) compared to 0.315" (8.00mm) for the 78B07S. This 0.019" (0.48mm) difference may affect clearance in space-constrained applications. Verify PCB layout clearance before substitution.

Q: Are there RoHS compliance differences between these parts?

A: Yes. The 78B07S is RoHS non-compliant, while both the 78B07ST and 206-7ST are ROHS3 compliant. If your application requires RoHS compliance, either the 78B07ST or 206-7ST is suitable.

Q: What is the difference in packaging between these parts?

A: The 78B07S is supplied in bulk packaging, while the 78B07ST and 206-7ST are supplied in tube packaging. Verify packaging requirements for your procurement and assembly processes.

Q: Which substitute offers the longest operational life?

A: The 206-7ST provides 10,000 electrical cycles compared to 2,000 cycles for both the 78B07S and 78B07ST. However, this advantage applies only if your application operates within the 206-7ST's reduced electrical ratings (50mA, 24VDC).