Grayhill 78B07 DIP Switch SPST 7-Position Equivalent & Substitute Parts

Part Overview

The Grayhill 78B07 is a slide-actuated DIP switch with SPST (Single Pole Single Throw) circuit configuration, rated for 150mA at 30VDC. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 78B07 features a 7-position through-hole configuration with gold-plated copper alloy contacts and operates across the industrial temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value
Circuit Type	SPST (Single Pole Single Throw)
Number of Positions	7
Current Rating	150mA
Voltage Rating	30VDC
Actuator Type	Slide (Standard)
Mounting Type	Through Hole
Pitch	0.100" (2.54mm)
Operating Temperature Range	-40°C to 85°C
Contact Finish	Gold
Termination Style	PC Pin

Substitute Part Grouping Explanation

Substitution eligibility for the 78B07 is determined by strict electrical and mechanical compatibility criteria. The following parameters must align or exceed the main part specifications:

Critical Matching Parameters:

Circuit configuration: SPST
Number of positions: 7
Mounting type: Through Hole
Pitch: 0.100" (2.54mm)
Termination style: PC Pin
Actuator type: Slide (Standard)

Allowable Variance Parameters:

Current rating: Must equal or exceed 150mA
Voltage rating: Must equal or exceed 30VDC
Operating temperature: Must encompass or exceed -40°C to 85°C range
Contact finish: Gold-plated acceptable
RoHS compliance: Preferred for new designs

The substitute parts listed below satisfy these criteria with documented electrical and mechanical specifications.

Parameter Comparison

Parameter	78B07 (Main)	78B07T	206-7	BD07
Manufacturer	Grayhill Inc.	Grayhill Inc.	CTS Electrocomponents	C&K
Product Status	Obsolete	Active	Active	Active
Circuit Type	SPST	SPST	SPST	SPST
Number of Positions	7	7	7	7
Current Rating (Amps)	150mA	150mA	50mA	100mA
Voltage Rating	30VDC	30VDC	24VDC	5VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)	Slide (Standard)
Actuator Level	Raised	Raised	Raised	Raised
Height Above Board	0.315" (8.00mm)	0.315" (8.00mm)	0.334" (8.48mm)	0.297" (7.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin	PC Pin
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish	Gold	Gold	Gold	Gold
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-55°C to 85°C	-40°C to 85°C
Electrical Life	2,000 Cycles	2,000 Cycles	10,000 Cycles	10,000 Cycles
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Bulk	Tube	Tube	Tube

Engineering Selection Recommendations

Primary Substitute: Grayhill 78B07T

The 78B07T is the direct successor to the 78B07, manufactured by the same supplier (Grayhill Inc.). It maintains identical electrical ratings (150mA, 30VDC), mechanical dimensions, and circuit configuration. The 78B07T is currently in active production status and carries ROHS3 compliance certification, making it the preferred choice for new designs and production continuity. Packaging is supplied in tube format rather than bulk.

Secondary Substitute: CTS Electrocomponents 206-7

The 206-7 provides functional substitution for applications where current and voltage requirements are lower than the main part specifications. This part is rated for 50mA at 24VDC, which is below the 78B07 rating. The 206-7 is suitable only for circuits designed to operate within these reduced electrical parameters. It offers extended electrical life (10,000 cycles versus 2,000 cycles) and an expanded operating temperature range (-55°C to 85°C). ROHS3 compliance is certified.

Tertiary Substitute: C&K BD07

The BD07 is applicable only to applications requiring 5VDC operation at 100mA maximum current. This part does not meet the voltage and current specifications of the 78B07 and should be selected only when circuit requirements are specifically limited to 5VDC logic-level switching. The BD07 offers superior mechanical life (10,000 cycles) and includes washable construction. ROHS3 compliance is certified.

Frequently Asked Questions (FAQ)

Q: Can the 78B07T directly replace the 78B07 without PCB modification?

A: Yes. The 78B07T maintains identical pitch (0.100"), height above board (0.315"), and termination style (PC Pin). No PCB layout changes are required for direct substitution.

Q: Is the 206-7 suitable for 30VDC applications?

A: No. The 206-7 is rated for 24VDC maximum. Using this part in a 30VDC circuit exceeds its voltage specification and will result in component failure.

Q: What is the primary difference between 78B07 and 78B07T?

A: The 78B07T is the active production variant with ROHS3 compliance. The 78B07 is obsolete and non-compliant. Electrical and mechanical specifications are identical.

Q: Can the BD07 be used in a 30VDC circuit?

A: No. The BD07 is rated for 5VDC operation only. It is not suitable for 30VDC applications.

Q: Which substitute offers the longest operational life?

A: Both the 206-7 and BD07 offer 10,000 electrical cycles, compared to 2,000 cycles for the 78B07 and 78B07T.

Q: Are all substitute parts RoHS compliant?

A: The 78B07T, 206-7, and BD07 are all ROHS3 compliant. The original 78B07 is non-compliant.

Q: What packaging formats are available for substitutes?

A: The 78B07T, 206-7, and BD07 are supplied in tube packaging. The original 78B07 was supplied in bulk format.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: No. Substitution must be based on specific circuit voltage and current requirements. Only the 78B07T provides full electrical equivalence to the 78B07.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message