Grayhill 78RB10 DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 78RB10 is a 10-position slide actuator DIP switch rated for 150mA at 30VDC, designed for through-hole mounting in electronic assemblies. This component features a single-pole single-throw (SPST) circuit configuration with gold-plated copper alloy contacts and operates across an industrial temperature range of -40°C to 85°C.

The 78RB10 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and repairs.

Substiute Parts

78RB10

Grayhill Inc.In Stock: 100978RB10 Datasheet

Current PartRFQ

78RB10T

Grayhill Inc.In Stock: 98078RB10T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Grayhill 78RB10 is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must maintain identical specifications in the following critical areas:

Electrical Parameters: Circuit configuration (SPST), number of positions (10), current rating (150mA), and voltage rating (30VDC) must be identical.

Mechanical Parameters: Actuator type (slide standard), actuator level (flush/recessed), mounting method (through hole), pitch (0.100"), height above board (0.265"), and overall length (1.080") must match exactly.

Material and Contact Specifications: Contact material (copper alloy), contact finish (gold), termination style (PC pin), and body material (thermoplastic) must be preserved.

Environmental and Operational Parameters: Operating temperature range (-40°C to 85°C), mechanical life (2,000 cycles), and electrical life (2,000 cycles) must be maintained.

The 78RB10T qualifies as a direct substitute based on complete parameter alignment across all specified criteria.

Parameter Comparison

Engineering Selection Recommendations

The Grayhill 78RB10T serves as the direct functional equivalent to the obsolete 78RB10. All electrical and mechanical parameters are identical, ensuring drop-in compatibility in existing circuit designs and PCB layouts.

The primary distinction between these parts is product status and regulatory compliance. The 78RB10 is classified as obsolete and carries RoHS non-compliant status. The 78RB10T maintains active product status and achieves RoHS3 compliance, making it the appropriate selection for new designs and applications subject to regulatory requirements.

Packaging differs between the two parts: the 78RB10 is supplied in bulk format, while the 78RB10T is packaged in tubes. This distinction affects inventory management and handling procedures but does not impact electrical or mechanical performance.

For applications requiring the 10-position SPST DIP switch configuration with 150mA/30VDC ratings and through-hole mounting, the 78RB10T is the current production equivalent and should be specified for all new procurement activities.

Frequently Asked Questions (FAQ)

Q: Can the 78RB10T be used as a direct replacement for the 78RB10 in existing assemblies?

A: Yes. The 78RB10T is electrically and mechanically identical to the 78RB10 across all specified parameters. Pin configuration, pitch, height, and electrical ratings are equivalent, enabling direct substitution without circuit redesign or PCB modification.

Q: What is the significance of the different RoHS compliance status between these parts?

A: The 78RB10 is RoHS non-compliant, while the 78RB10T is RoHS3 compliant. This distinction is relevant for applications subject to European Union Restriction of Hazardous Substances regulations or equivalent compliance requirements. The 78RB10T is the appropriate selection for regulated environments.

Q: Does the packaging difference between bulk and tube formats affect component performance?

A: No. Packaging format (bulk versus tube) is a supply chain and handling consideration only. It does not alter electrical characteristics, mechanical dimensions, or operational performance of the switch itself.

Q: Are the electrical ratings identical between the 78RB10 and 78RB10T?

A: Yes. Both parts are rated for 150mA at 30VDC with SPST circuit configuration and 10-position operation. Current and voltage ratings, contact material, contact finish, and all electrical specifications are identical.

Q: What is the mechanical life expectancy for both parts?

A: Both the 78RB10 and 78RB10T are rated for 2,000 mechanical cycles and 2,000 electrical cycles under specified operating conditions.

Q: Are there any temperature range differences between these parts?

A: No. Both parts operate across the identical temperature range of -40°C to 85°C.

Q: Why is the 78RB10 classified as obsolete if the 78RB10T is functionally identical?

A: Product status reflects manufacturing and distribution decisions by Grayhill Inc. The 78RB10T represents the current production version of this switch configuration and is the recommended part for all new applications and ongoing procurement.