Grayhill 78B06S DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 78B06S is a 6-position slide actuator DIP switch with SPST circuit configuration, rated for 150mA at 30VDC. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 78B06S features through-hole mounting with gold-plated copper alloy contacts, thermoplastic housing, and tape seal protection suitable for washable applications.

Key Parameters

Parameter	Value
Circuit Configuration	SPST (Single Pole Single Throw)
Number of Positions	6
Current Rating	150mA
Voltage Rating	30VDC
Actuator Type	Slide (Standard), Raised Level
Mounting Type	Through Hole
Pitch	0.100" (2.54mm)
Height Above Board	0.315" (8.00mm)
Contact Material	Copper Alloy, Gold Finish
Operating Temperature Range	-40°C to 85°C
Mechanical Life	2,000 Cycles
Electrical Life	2,000 Cycles

Substitute Part Grouping Explanation

Substitution eligibility for the 78B06S is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

Circuit configuration (SPST)
Number of positions (6)
Mounting type (Through Hole)
Pitch spacing (0.100" / 2.54mm)
Actuator type (Slide, Standard)
Termination style (PC Pin)

Secondary Compatibility Parameters:

Current rating must equal or exceed 150mA
Voltage rating must equal or exceed 30VDC
Operating temperature range must encompass -40°C to 85°C
Height above board and overall dimensions must be compatible with PCB layout constraints

The 78B06ST (Grayhill) qualifies as a direct equivalent, maintaining identical electrical and mechanical specifications while offering active product status and improved compliance. The 206-6ST (CTS Electrocomponents) qualifies as a functional substitute with noted parameter deviations that require circuit-level evaluation.

Parameter Comparison

Parameter	78B06S (Main Part)	78B06ST (Grayhill)	206-6ST (CTS)
Manufacturer	Grayhill Inc.	Grayhill Inc.	CTS Electrocomponents
Product Status	Obsolete	Active	Active
Circuit Configuration	SPST	SPST	SPST
Number of Positions	6	6	6
Current Rating	150mA	150mA	50mA
Voltage Rating	30VDC	30VDC	24VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)
Actuator Level	Raised	Raised	Raised
Height Above Board	0.315" (8.00mm)	0.315" (8.00mm)	0.334" (8.48mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish	Gold	Gold	Gold
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-55°C to 85°C
Mechanical Life	2,000 Cycles	2,000 Cycles	Not Specified
Electrical Life	2,000 Cycles	2,000 Cycles	10,000 Cycles
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Bulk	Tube	Tube

Engineering Selection Recommendations

78B06ST (Grayhill Inc.) - Preferred Equivalent

The 78B06ST is the recommended direct replacement for the obsolete 78B06S. This part maintains identical electrical specifications (150mA, 30VDC), mechanical configuration, and operating temperature range. The 78B06ST carries active product status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Packaging is supplied in tube format. No circuit redesign or PCB layout modification is required for this substitution.

206-6ST (CTS Electrocomponents) - Functional Substitute with Deviations

The 206-6ST qualifies as a functional substitute when circuit requirements permit reduced current and voltage ratings. This part is rated for 50mA at 24VDC, representing a 67% reduction in current capacity and 20% reduction in voltage rating compared to the 78B06S. The 206-6ST offers extended electrical life (10,000 cycles versus 2,000 cycles) and broader operating temperature range (-55°C to 85°C). Height above board is 0.334" (8.48mm), a 0.019" increase from the 78B06S. ROHS3 compliance and active product status are confirmed. Selection of this part requires verification that circuit operating conditions remain within the 50mA/24VDC envelope.

Frequently Asked Questions (FAQ)

Q: Can the 78B06ST be used as a direct drop-in replacement for the 78B06S?

A: Yes. The 78B06ST maintains identical electrical ratings (150mA, 30VDC), mechanical dimensions, pitch spacing, and operating temperature range. No circuit modifications or PCB layout changes are required. The primary difference is product status (active versus obsolete) and improved RoHS compliance.

Q: What are the limitations of using the 206-6ST as a substitute?

A: The 206-6ST has reduced current capacity (50mA versus 150mA) and lower voltage rating (24VDC versus 30VDC). These reductions must be evaluated against actual circuit operating conditions. If the circuit draws more than 50mA or operates above 24VDC, the 206-6ST is not suitable. Height above board is also 0.019" greater, which may affect PCB clearance in space-constrained layouts.

Q: Are there packaging differences between these parts?

A: Yes. The 78B06S is supplied in bulk packaging, while both the 78B06ST and 206-6ST are supplied in tube packaging. Tube packaging provides improved component protection and handling efficiency for production environments.

Q: What is the mechanical life difference between the 78B06S and 206-6ST?

A: The 78B06S specifies 2,000 mechanical cycles. The 206-6ST does not provide a mechanical life specification in the available data. However, the 206-6ST offers 10,000 electrical cycles compared to 2,000 cycles for the 78B06S, indicating potentially superior contact durability under electrical switching conditions.

Q: Are all three parts RoHS compliant?

A: No. The 78B06S is RoHS non-compliant. Both the 78B06ST and 206-6ST are ROHS3 compliant, meeting current regulatory requirements for new designs and procurement in regulated markets.

Q: What is the pitch spacing, and is it consistent across all three parts?

A: All three parts feature 0.100" (2.54mm) pitch spacing, the standard spacing for DIP switch arrays. This ensures PCB footprint compatibility across all three options.

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