Grayhill 97R08T DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 97R08T is an 8-position surface mount DIP switch with SPST (Single Pole Single Throw) circuit configuration, rated for 25mA at 24VDC. This component is designed for applications requiring discrete logic selection or configuration settings in compact form factors. The part is currently in active production status with 877 pieces available in original inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the critical functional parameters: circuit type, number of positions, current and voltage ratings, actuator style, mounting type, and termination configuration.

Substiute Parts

97R08T

Grayhill Inc.In Stock: 94797R08T Datasheet

Current PartRFQ

218-8LPST

CTS ElectrocomponentsIn Stock: 24526218-8LPST Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 97R08T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Circuit type: SPST
• Number of positions: 8
• Current rating: 25mA minimum
• Voltage rating: 24VDC minimum
• Actuator type: Slide (Standard)
• Actuator level: Flush or Recessed
• Mounting type: Surface Mount
• Termination style: Gull Wing
• Pitch: 0.050" (1.27mm), Half

Allowable Variations:

• Contact material (Copper Alloy or Beryllium Copper)
• Contact finish (Gold)
• Height above board (within mechanical envelope constraints)
• Operating temperature range (may be wider)
• Body material composition
• Washable feature (additional capability)
• Mechanical or electrical life ratings (when one is specified)

The CTS Electrocomponents 218-8LPST meets all mandatory matching parameters and qualifies as a direct substitute for the 97R08T.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: Grayhill 97R08T

The 97R08T is the specified component and remains the first choice when available. It is in active production status with established supply (877 pieces in stock) and carries full ROHS3 and REACH compliance certifications.

Substitute Selection: CTS Electrocomponents 218-8LPST

The 218-8LPST qualifies as a direct electrical and mechanical substitute. Both components share identical circuit configuration, position count, current/voltage ratings, actuator type, mounting method, and termination style. Both are ROHS3 compliant and REACH unaffected.

Compatibility Considerations:

The 218-8LPST exhibits a greater height above board (0.104" versus 0.061"), which must be verified against PCB layout constraints and enclosure clearances. The substitute offers an extended operating temperature range (-55°C versus -40°C minimum), which provides additional thermal margin in cold environments. The CTS part includes washable terminals and epoxy sealed construction, features not present in the Grayhill version. Contact material differs (Beryllium Copper versus Copper Alloy), both with gold finish.

Compliance Status:

Both parts maintain identical regulatory compliance: ROHS3 Compliant, REACH Unaffected, and EAR99 export classification. Moisture sensitivity level is equivalent at MSL 1 (Unlimited).

Frequently Asked Questions (FAQ)

Q: Can the CTS 218-8LPST be used as a direct replacement for the Grayhill 97R08T in existing designs?

A: The CTS 218-8LPST is electrically and functionally equivalent. The primary design consideration is the increased height above board (0.104" versus 0.061"). Verify that PCB layout and enclosure clearances accommodate this dimension before substitution.

Q: What is the difference in contact material between these two parts?

A: The 97R08T uses Copper Alloy contacts while the 218-8LPST uses Beryllium Copper contacts. Both are finished with gold plating. Beryllium Copper offers superior electrical conductivity and wear resistance. Both materials are suitable for 25mA switching applications at 24VDC.

Q: Are both parts RoHS compliant?

A: Yes. Both the Grayhill 97R08T and CTS 218-8LPST are ROHS3 Compliant and REACH Unaffected, meeting current environmental regulations for electronic components.

Q: What does "washable" mean for the CTS part?

A: The 218-8LPST features epoxy sealed terminals and tape seal construction, allowing the assembled PCB to undergo aqueous cleaning processes without component damage. The 97R08T is not rated for washing processes.

Q: How do the operating temperature ranges compare?

A: The 97R08T operates from -40°C to 85°C. The 218-8LPST operates from -55°C to 85°C, providing an extended lower temperature capability. Both share the same upper temperature limit.

Q: Are the mechanical and electrical life ratings equivalent?

A: The 97R08T specifies 1,000 mechanical cycles. The 218-8LPST specifies 1,000 electrical cycles. Both ratings indicate equivalent switch durability for the intended application. The distinction between mechanical and electrical life measurement methodology does not affect functional equivalence.

Q: What is the pitch specification and why is it important?

A: Both parts have a 0.050" (1.27mm) half-pitch specification. This defines the center-to-center spacing between switch positions and is critical for PCB footprint compatibility. Identical pitch ensures direct mechanical interchangeability on the circuit board.

Q: Can I use either part interchangeably in new designs?

A: Yes, provided that the height above board dimension of the 218-8LPST (0.104") is acceptable for your mechanical envelope. Both parts meet identical electrical specifications and regulatory requirements. Verify clearance constraints before finalizing component selection.