Grayhill 97R04T DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 97R04T is a surface mount DIP switch featuring SPST (Single Pole Single Throw) circuit configuration with 4 positions, rated for 25mA at 24VDC. This component is designed for applications requiring manual selection of electrical configurations through slide actuator operation. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across different manufacturers while preserving circuit functionality and board integration requirements.

Substiute Parts

97R04T

Grayhill Inc.In Stock: 100897R04T Datasheet

Current PartRFQ

218-4LPST

CTS ElectrocomponentsIn Stock: 6599218-4LPST Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Grayhill 97R04T is determined by strict alignment with the following electrical and mechanical parameters:

Critical Matching Parameters:

• Circuit configuration (SPST)
• Position count (4 positions)
• Current rating (25mA minimum)
• Voltage rating (24VDC minimum)
• Mounting method (Surface Mount)
• Pitch specification (0.050" / 1.27mm Half)
• Termination style (Gull Wing)
• Actuator type (Slide Standard)

Acceptable Variation Parameters:

• Contact material (Copper Alloy or Beryllium Copper acceptable)
• Contact finish (Gold plating maintained)
• Height above board (within PCB clearance limits)
• Operating temperature range (substitute may exceed specified range)
• Body material composition
• Mechanical or electrical life ratings (when one is specified, substitute may use alternative metric)

Regulatory Alignment:

• RoHS3 compliance required
• REACH Unaffected status maintained
• ECCN EAR99 classification consistent
• MSL 1 rating preserved

The CTS Electrocomponents 218-4LPST qualifies as a direct substitute based on matching all critical parameters while maintaining regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: Grayhill 97R04T

The Grayhill 97R04T remains the specified component when original design validation, established supply chain, and documented performance history are required. Active product status ensures continued manufacturer support and availability. Current inventory of 906 units supports immediate procurement.

Substitute Selection: CTS Electrocomponents 218-4LPST

The CTS 218-4LPST qualifies as a direct functional substitute when:

• Supply continuity for the Grayhill part cannot be maintained
• Design flexibility permits component substitution
• PCB layout accommodates the increased height above board (0.104" vs. 0.061")
• Extended operating temperature range (-55°C to 85°C) provides additional environmental margin

Both parts maintain identical electrical specifications (SPST, 4-position, 25mA, 24VDC), matching pitch (0.050"), and regulatory compliance (RoHS3, REACH Unaffected, EAR99). The CTS part offers higher inventory availability (6561 units) and includes epoxy sealed terminals with tape seal features.

Critical Consideration:

The height differential (0.043" / 1.10mm) between parts requires verification against PCB clearance requirements, particularly in applications with space constraints or adjacent components.

Frequently Asked Questions (FAQ)

Q: Can the CTS 218-4LPST directly replace the Grayhill 97R04T without PCB redesign?

A: Electrical and functional compatibility is confirmed. However, the increased height above board (0.104" vs. 0.061") requires verification against PCB clearance specifications and adjacent component placement. If clearance is adequate, no PCB redesign is necessary.

Q: Are the contact materials functionally equivalent?

A: Yes. Both Copper Alloy (Grayhill) and Beryllium Copper (CTS) with gold plating provide equivalent electrical performance for this 25mA, 24VDC application. Contact material selection does not affect circuit functionality within the specified operating parameters.

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

A: Both parts use 0.050" (1.27mm) half-pitch spacing. This specification is critical because it determines the PCB footprint and solder pad layout. Matching pitch ensures the substitute part can be soldered to the existing PCB without modification.

Q: Do both parts have the same termination style?

A: Yes. Both the Grayhill 97R04T and CTS 218-4LPST use Gull Wing termination, which is compatible with standard reflow soldering processes and automated assembly equipment.

Q: What is the difference in operating temperature ranges?

A: The Grayhill part operates from -40°C to 85°C, while the CTS part operates from -55°C to 85°C. The CTS part's extended lower temperature limit provides additional environmental margin but does not affect substitution eligibility for applications within the Grayhill specification range.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the Grayhill 97R04T and CTS 218-4LPST are RoHS3 compliant with REACH Unaffected status and EAR99 export classification, meeting current regulatory requirements.

Q: What does MSL 1 (Unlimited) mean for storage and handling?

A: MSL 1 rating indicates unlimited shelf life without moisture bake-out requirements. Both parts can be stored at standard conditions without special humidity control or pre-soldering baking procedures.

Q: How do the mechanical life ratings compare?

A: The Grayhill part specifies 1,000 mechanical cycles. The CTS part specifies 1,000 electrical cycles instead. Both ratings indicate equivalent durability for typical DIP switch applications involving manual position selection.

Q: Is the washable specification important for substitution?

A: The Grayhill part is not washable, while the CTS part is washable. If post-assembly cleaning is required, the CTS part offers additional process flexibility. If no cleaning is planned, this difference does not affect substitution eligibility.