Grayhill 78B10 DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 78B10 is a single-pole single-throw (SPST) DIP switch with 10 positions, 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 78B10 features a slide actuator with gold-plated copper alloy contacts, through-hole mounting, and a standard 0.100" pitch configuration suitable for PC board integration.

Substiute Parts

78B10

Grayhill Inc.In Stock: 84278B10 Datasheet

Current PartRFQ

78B10T

Grayhill Inc.In Stock: 200278B10T Datasheet

DirectRFQ

206-10

CTS ElectrocomponentsIn Stock: 2026206-10 Datasheet

DirectRFQ

BD10

C&KIn Stock: 1510BD10 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78B10 is determined by the following critical parameters: circuit configuration (SPST), number of positions (10), actuator type (slide standard), mounting method (through hole), and pitch spacing (0.100"). These parameters establish mechanical and electrical compatibility at the board level.

The substitute parts are grouped into two categories based on electrical rating compatibility:

Category 1: Direct Electrical Equivalent The 78B10T (Grayhill Inc.) maintains identical electrical specifications (150mA, 30VDC) and mechanical form factor. This part is the primary substitute, differing only in packaging (tube versus bulk) and product status (active versus obsolete).

Category 2: Functional Substitutes with Reduced Electrical Ratings The 206-10 (CTS Electrocomponents) and BD10 (C&K) provide the same mechanical interface and circuit configuration but with lower current and voltage ratings. These parts are suitable only for applications where the circuit operates within their specified electrical limits.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 78B10T

The 78B10T is the recommended substitute for direct replacement of the obsolete 78B10. Both parts are manufactured by Grayhill Inc. and maintain identical electrical ratings (150mA, 30VDC), mechanical dimensions, and circuit configuration. The 78B10T is currently in active production status with 1,950 units in stock, ensuring supply continuity. Both parts carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The only functional difference is packaging format (tube for 78B10T versus bulk for 78B10), which does not affect electrical or mechanical performance.

Secondary Substitutes: 206-10 and BD10

The 206-10 (CTS Electrocomponents) and BD10 (C&K) are functional substitutes suitable only for applications where circuit requirements fall within their reduced electrical ratings. The 206-10 operates at 50mA and 24VDC, while the BD10 operates at 100mA and 5VDC. These parts share the same mechanical interface, 10-position SPST configuration, and through-hole mounting. Selection of these parts requires verification that the application circuit does not exceed their specified current and voltage limits. Both parts are in active production with adequate inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 78B10T be used as a direct replacement for the 78B10?

A: Yes. The 78B10T is a direct electrical and mechanical equivalent. Both parts are manufactured by Grayhill Inc., share identical ratings (150mA, 30VDC), and maintain the same form factor and pitch. The 78B10T is the recommended substitute due to its active production status.

Q: What are the limitations of using the 206-10 as a substitute?

A: The 206-10 has reduced electrical ratings (50mA at 24VDC compared to 150mA at 30VDC). It is suitable only for applications where the circuit operates within these lower limits. The 206-10 also has a slightly greater height above board (0.334" versus 0.315"), which may affect clearance in space-constrained layouts.

Q: Can the BD10 replace the 78B10 in high-voltage applications?

A: No. The BD10 is rated for 5VDC only, making it unsuitable for applications requiring 30VDC operation. The BD10 is appropriate only for low-voltage digital logic circuits. However, the BD10 offers superior mechanical life (10,000 cycles) and includes a washable feature not present in the 78B10.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All listed substitute parts (78B10T, 206-10, and BD10) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the difference between the 78B10 and 78B10T packaging?

A: The 78B10 is supplied in bulk packaging, while the 78B10T is supplied in tube packaging. This difference affects handling and storage but does not impact electrical or mechanical performance. Tube packaging is standard for active production parts.

Q: How do the mechanical life ratings compare?

A: The 78B10 and 78B10T are rated for 2,000 mechanical cycles. The 206-10 does not specify mechanical life. The BD10 is rated for 10,000 mechanical cycles, offering extended durability for high-cycle applications.

Q: Are there height clearance differences between substitute parts?

A: Yes. The 78B10 and 78B10T have a height of 0.315" (8.00mm). The 206-10 is slightly taller at 0.334" (8.48mm), while the BD10 is shorter at 0.297" (7.54mm). These differences may affect PCB layout and component clearance considerations.