Grayhill 90MB08S DIP Switch - Equivalent & Substitute Parts

Part Overview

The Grayhill 90MB08S is an 8-position DIP switch with SPST (Single Pole Single Throw) circuit configuration, rated for 25mA at 24VDC. This component features a slide actuator with standard (flush, recessed) positioning and is designed for through-hole mounting on printed circuit boards.

The 90MB08S carries an Obsolete product status. Identification of equivalent substitute parts is necessary to maintain design continuity and ensure procurement availability for new production runs, repairs, and system upgrades.

Substiute Parts

90MB08S

Grayhill Inc.In Stock: 97890MB08S Datasheet

Current PartRFQ

90B08ST

Grayhill Inc.In Stock: 630690B08ST Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Grayhill 90MB08S is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Circuit configuration (SPST), number of positions (8), current rating (25mA), and voltage rating (24VDC) must be identical.

Mechanical Parameters: Actuator type (slide, standard), actuator level (flush, recessed), mounting method (through hole), pitch (0.100"/2.54mm), and height above board (0.195"/4.95mm) must match exactly.

Material Specifications: Contact material (copper alloy) and contact finish (gold) must be consistent.

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

The substitute part 90B08ST meets all these criteria and is therefore a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The Grayhill 90B08ST is a direct functional substitute for the obsolete 90MB08S. Both components share identical electrical and mechanical specifications across all critical parameters.

Product Status Consideration: The 90MB08S is classified as Obsolete, while the 90B08ST maintains Active status. For new designs and ongoing production, the 90B08ST is the appropriate selection to ensure long-term component availability and supply chain continuity.

Compliance Advantage: The 90B08ST achieves ROHS3 compliance, whereas the 90MB08S is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the 90B08ST satisfies current environmental standards.

Moisture Sensitivity Improvement: The 90B08ST carries MSL 1 (Unlimited) rating compared to the 90MB08S MSL 3 (168 Hours) rating. This represents improved handling flexibility during storage and assembly operations.

Packaging Consideration: The 90B08ST is supplied in Tube packaging, which may differ from the original 90MB08S packaging format. Verify packaging compatibility with existing assembly and procurement workflows.

Frequently Asked Questions (FAQ)

Q: Can the 90B08ST replace the 90MB08S in existing circuit designs?

A: Yes. The 90B08ST is electrically and mechanically equivalent to the 90MB08S. All functional parameters—circuit configuration, position count, current and voltage ratings, actuator type, mounting method, and dimensional specifications—are identical. Direct substitution is possible without circuit modification.

Q: What is the primary reason to transition from 90MB08S to 90B08ST?

A: The 90MB08S is Obsolete, creating procurement risk for future production and service requirements. The 90B08ST is an Active product from the same manufacturer and series, ensuring reliable long-term availability. Additionally, the 90B08ST offers ROHS3 compliance and improved moisture sensitivity handling.

Q: Are there any dimensional differences between these parts?

A: No. Both components share identical dimensions: 0.870" (22.10mm) length, 0.195" (4.95mm) height above board, and 0.100" (2.54mm) pitch. PCB layout and mechanical clearances remain unchanged.

Q: Does the 90B08ST meet RoHS requirements?

A: Yes. The 90B08ST is ROHS3 compliant. The original 90MB08S is RoHS non-compliant. For applications requiring RoHS certification or customer mandates, the 90B08ST satisfies these requirements.

Q: What is the difference in Moisture Sensitivity Level between these parts?

A: The 90MB08S carries MSL 3 (168 Hours), requiring controlled storage conditions. The 90B08ST carries MSL 1 (Unlimited), allowing indefinite storage without moisture control measures. This simplifies inventory management and reduces handling constraints.

Q: Is the packaging format the same?

A: The 90MB08S packaging format is not specified in available data. The 90B08ST is supplied in Tube packaging. Confirm packaging compatibility with your assembly process and procurement systems before implementation.

Q: Are the electrical and mechanical life ratings identical?

A: Yes. Both components are rated for 2,000 mechanical cycles and 2,000 electrical cycles, ensuring equivalent operational durability and reliability.