Grayhill 97R08RT DIP Switch SPST Equivalent & Substitute Parts

Part Overview

The Grayhill 97R08RT 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 switching logic in compact form factors. The part is currently in active production status with 834 units in stock.

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

Substiute Parts

97R08RT

Grayhill Inc.In Stock: 92397R08RT Datasheet

Current PartRFQ

218-8LPST

CTS ElectrocomponentsIn Stock: 24526218-8LPST Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 97R08RT is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Circuit type must be SPST
• Number of positions must be 8
• Current rating must be 25mA minimum
• Voltage rating must be 24VDC minimum

Mechanical Equivalence Requirements:

• Actuator type must be Slide (Standard)
• Mounting type must be Surface Mount
• Termination style must be Gull Wing
• Pitch must be 0.050" (1.27mm), Half
• Actuator level must be Flush or Recessed

The CTS Electrocomponents 218-8LPST meets all electrical and mechanical equivalence criteria and is therefore classified as a direct substitute for the 97R08RT.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: Grayhill 97R08RT

The 97R08RT is the specified component and should be used when:

• Design specifications explicitly call for this part number
• Inventory availability is confirmed (834 units in stock)
• RoHS compliance is required (RoHS Compliant status)
• Mechanical life cycle data is a design requirement

Substitute Selection: CTS Electrocomponents 218-8LPST

The 218-8LPST is a qualified substitute when:

• Electrical performance requirements are met (SPST, 8-position, 25mA, 24VDC)
• Mechanical compatibility is confirmed (Surface Mount, Gull Wing, 0.050" pitch)
• Extended operating temperature range (-55°C to 85°C) provides additional margin
• Higher inventory availability is advantageous (24,500 units in stock)
• ROHS3 compliance satisfies regulatory requirements
• Washable terminals and epoxy sealed construction are acceptable for the application

Design Considerations:

The CTS 218-8LPST exhibits a greater height above board (0.104" versus 0.061"), which must be evaluated against PCB layout constraints and clearance requirements. The beryllium copper contact material in the CTS part differs from the copper alloy contacts in the Grayhill part; both materials are suitable for the specified 25mA, 24VDC switching application.

Both parts carry identical ECCN (EAR99) and HTSUS (8536.50.9065) classifications and are REACH Unaffected, supporting equivalent supply chain and regulatory treatment.

Frequently Asked Questions (FAQ)

Q: Can the CTS 218-8LPST be used as a direct replacement for the Grayhill 97R08RT in existing designs?

A: Yes, the CTS 218-8LPST meets all critical electrical and mechanical equivalence criteria: SPST circuit, 8 positions, 25mA current rating, 24VDC voltage rating, slide actuator, surface mount configuration, gull wing termination, and 0.050" pitch. However, the increased height above board (0.104" versus 0.061") must be verified against PCB clearance specifications.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) Contact material—Copper Alloy (97R08RT) versus Beryllium Copper (218-8LPST); (2) Height above board—0.061" versus 0.104"; (3) Washability—No (97R08RT) versus Yes (218-8LPST); (4) Operating temperature range—-40°C to 85°C versus -55°C to 85°C. All other electrical and mechanical parameters are equivalent.

Q: Are there any compliance or regulatory differences?

A: Both parts are RoHS compliant (97R08RT is RoHS Compliant; 218-8LPST is ROHS3 Compliant), REACH Unaffected, and carry identical ECCN and HTSUS classifications. Both have MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Which part should be selected for new designs?

A: Selection depends on application-specific requirements. The Grayhill 97R08RT is preferred when mechanical life cycle specifications are critical. The CTS 218-8LPST is preferred when extended temperature range (-55°C minimum), washable terminals, or higher inventory availability are advantageous.

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

A: Both parts have a 0.050" (1.27mm) half-pitch specification. This determines PCB footprint spacing and is critical for ensuring proper mounting and electrical connectivity. Pitch equivalence is a prerequisite for mechanical interchangeability.

Q: Can these parts be used in applications requiring washable assembly processes?

A: The CTS 218-8LPST is rated as washable with epoxy sealed terminals and tape seal features. The Grayhill 97R08RT is not rated as washable. If washable assembly is a process requirement, the CTS part is the appropriate selection.