Grayhill 90MB02S DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 90MB02S is a slide-actuated DIP switch with SPST (Single Pole Single Throw) configuration, rated for 25mA at 24VDC. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement planning. The 90MB02S features a through-hole mounting configuration with gold-plated copper alloy contacts, designed for applications requiring reliable switching in industrial and commercial environments.

Substiute Parts

90MB02S

Grayhill Inc.In Stock: 108490MB02S Datasheet

Current PartRFQ

90B02ST

Grayhill Inc.In Stock: 72190B02ST Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the Grayhill 90MB02S is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Circuit configuration (SPST), number of positions (2), current rating (25mA), and voltage rating (24VDC) must remain identical. These parameters define the functional switching capability and load-handling capacity.

Mechanical Parameters: Actuator type (Slide Standard), mounting type (Through Hole), termination style (PC Pin), and pitch (0.100" / 2.54mm) must match to ensure physical compatibility with existing PCB layouts and assembly processes.

Physical Dimensions: Height above board (0.195" / 4.95mm) and length (0.270" / 6.86mm) must be maintained to prevent interference with adjacent components and enclosure constraints.

Material Specifications: Contact material (Copper Alloy) and contact finish (Gold) ensure consistent electrical performance and corrosion resistance.

Environmental Specifications: Operating temperature range (-40°C to 85°C), mechanical life (2,000 cycles), and electrical life (2,000 cycles) define reliability under specified conditions.

The Grayhill 90B02ST meets all these criteria and qualifies as a direct substitute for the obsolete 90MB02S.

Parameter Comparison

Engineering Selection Recommendations

The Grayhill 90B02ST is the qualified substitute for the obsolete 90MB02S based on complete electrical and mechanical parameter equivalence. All critical switching characteristics, physical dimensions, and contact specifications are identical between the two parts.

Product Status Advantage: The 90B02ST carries Active product status, ensuring continued availability and manufacturer support, whereas the 90MB02S is classified as Obsolete.

Regulatory Compliance: The 90B02ST achieves RoHS3 compliance, meeting current environmental regulations. The 90MB02S is RoHS non-compliant, which may present procurement and regulatory challenges in applications subject to RoHS requirements.

Moisture Sensitivity: The 90B02ST features MSL 1 (Unlimited moisture sensitivity level), providing superior protection against moisture-induced failures compared to the 90MB02S MSL 3 rating (168 hours). This represents an improvement in component reliability under humid storage and operational conditions.

Packaging: The 90B02ST is supplied in Tube packaging, whereas the 90MB02S packaging specification is not defined. Both parts maintain identical electrical and mechanical specifications for direct substitution.

For new designs and component replenishment, the Grayhill 90B02ST is the appropriate selection. For legacy systems currently using the 90MB02S, direct replacement with the 90B02ST is electrically and mechanically compatible without design modification.

Frequently Asked Questions (FAQ)

Q: Can the Grayhill 90B02ST directly replace the 90MB02S without PCB layout changes?

A: Yes. The 90B02ST is mechanically and electrically identical to the 90MB02S. Pitch (0.100" / 2.54mm), height above board (0.195" / 4.95mm), length (0.270" / 6.86mm), and termination style (PC Pin through-hole) are identical. No PCB layout modifications are required.

Q: What is the significance of the RoHS3 compliance difference?

A: The 90B02ST is RoHS3 compliant, meeting current environmental directives for restricted hazardous substances. The 90MB02S is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the 90B02ST is the appropriate selection.

Q: How do the MSL ratings differ, and what does this mean?

A: The 90B02ST has MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling. The 90MB02S has MSL 3 (168 hours), requiring controlled humidity storage conditions. The 90B02ST provides superior protection against moisture-related failures.

Q: Are the electrical specifications identical?

A: Yes. Both parts are SPST 2-position switches rated for 25mA at 24VDC with identical contact material (Copper Alloy), contact finish (Gold), operating temperature range (-40°C to 85°C), mechanical life (2,000 cycles), and electrical life (2,000 cycles).

Q: What packaging options are available?

A: The 90B02ST is supplied in Tube packaging. The 90MB02S packaging specification is not defined in available documentation. Tube packaging is standard for DIP switch components and is suitable for both manual and automated assembly processes.

Q: Why is the 90MB02S classified as Obsolete?

A: The 90MB02S has reached end-of-life status. The 90B02ST, as the active equivalent from the same manufacturer and series, is the recommended replacement for ongoing procurement and new designs.

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

A: No. Current rating (25mA), voltage rating (24VDC), mechanical life (2,000 cycles), and electrical life (2,000 cycles) are identical. Both parts use the same contact material and finish, ensuring equivalent electrical performance.