Grayhill 78RB09 DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 78RB09 is a 9-position DIP switch with SPST (Single Pole Single Throw) circuit configuration, rated for 150mA at 30VDC. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing production support and design continuity. The 78RB09 features a slide actuator with standard (flush, recessed) positioning, through-hole mounting, and gold-plated copper alloy contacts suitable for general-purpose switching applications in industrial and commercial electronics.

Due to its obsolete status, sourcing active production alternatives ensures supply chain reliability and access to current manufacturing batches with updated compliance certifications.

Substiute Parts

78RB09

Grayhill Inc.In Stock: 90678RB09 Datasheet

Current PartRFQ

78RB09T

Grayhill Inc.In Stock: 91078RB09T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 78RB09 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must maintain identical specifications in the following categories:

Electrical Parameters: Circuit type (SPST), number of positions (9), current rating (150mA), and voltage rating (30VDC) must be unchanged.

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

Material & Contact Specifications: Contact material (copper alloy) and contact finish (gold) ensure equivalent electrical performance and reliability.

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

The 78RB09T qualifies as a direct substitute based on complete parameter alignment across all these categories. The primary distinction is product status: 78RB09T is active production, whereas 78RB09 is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The 78RB09T is the direct active production equivalent of the obsolete 78RB09. All electrical and mechanical parameters are identical, ensuring drop-in compatibility in existing circuit designs and PCB layouts.

Product Status Consideration: The 78RB09T carries active product status, providing access to current manufacturing inventory and ongoing supply chain support. The 78RB09 is obsolete and subject to limited availability.

Compliance Upgrade: The 78RB09T achieves ROHS3 compliance, whereas the 78RB09 is RoHS non-compliant. This distinction is significant for applications subject to RoHS regulatory requirements in the EU and equivalent jurisdictions. Both parts maintain REACH Unaffected status and EAR99 export classification.

Packaging Difference: The 78RB09T is supplied in tube packaging, while the 78RB09 is supplied in bulk. Packaging selection should align with assembly process requirements and inventory management protocols.

For new designs, production restarts, or component replenishment, the 78RB09T is the appropriate selection. Existing stock of 78RB09 units may continue to be used in applications where RoHS compliance is not mandated, provided supply remains available.

Frequently Asked Questions (FAQ)

Q: Can the 78RB09T be used as a direct replacement for the 78RB09 in existing assemblies?

A: Yes. The 78RB09T is electrically and mechanically identical to the 78RB09. All functional parameters, including circuit configuration, current and voltage ratings, actuator type, mounting dimensions, and contact specifications, are equivalent. The component can be substituted without circuit redesign or PCB layout modification.

Q: What is the primary reason to transition from 78RB09 to 78RB09T?

A: The 78RB09 is classified as obsolete, limiting future availability and supply chain continuity. The 78RB09T is in active production, ensuring reliable sourcing for ongoing manufacturing and future orders. Additionally, the 78RB09T meets ROHS3 compliance standards, whereas the 78RB09 does not.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts operate at identical electrical specifications: 150mA current rating, 30VDC voltage rating, SPST circuit configuration, and 2,000-cycle electrical life. Contact material (copper alloy with gold finish) and operating temperature range (-40°C to 85°C) are identical.

Q: Does the packaging difference affect component functionality?

A: No. Packaging (tube versus bulk) affects logistics, storage, and assembly handling but does not alter electrical or mechanical performance. Packaging selection should be based on assembly process requirements and inventory management practices.

Q: Is the 78RB09T suitable for applications requiring RoHS compliance?

A: Yes. The 78RB09T is ROHS3 compliant. The 78RB09 is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the 78RB09T is the appropriate selection.

Q: Are the mechanical dimensions identical between 78RB09 and 78RB09T?

A: Yes. Both parts share identical mechanical specifications: 0.100" (2.54mm) pitch, 0.265" (6.73mm) height above board, 0.980" (24.89mm) length, through-hole mounting, and PC pin termination. PCB footprints and assembly processes are interchangeable.

Q: What is the relationship between part numbers 78RB09 and 78RB09T?

A: The 78RB09T is the active production variant of the 78RB09 series. The "T" designation indicates tube packaging and updated compliance status. Both parts belong to the Grayhill 78 series DIP switch family.