Grayhill Inc. 90MB04S DIP Switch - Equivalent & Substitute Parts

Part Overview

The Grayhill Inc. 90MB04S is a slide-actuated DIP switch featuring SPST (Single Pole Single Throw) configuration with 4 positions, 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 90MB04S remains available in inventory but represents a legacy product line requiring substitution analysis for new applications or long-term supply chain continuity.

Substiute Parts

90MB04S

Grayhill Inc.In Stock: 110490MB04S Datasheet

Current PartRFQ

90B04ST

Grayhill Inc.In Stock: 391390B04ST Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 90MB04S is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

• Circuit type (SPST)
• Number of positions (4)
• Current rating (25mA minimum)
• Voltage rating (24VDC minimum)

Mechanical Compatibility Parameters:

• Actuator type (Slide Standard)
• Actuator level (Flush, Recessed)
• Mounting type (Through Hole)
• Termination style (PC Pin)
• Pitch spacing (0.100" / 2.54mm)
• Height above board (0.195" / 4.95mm)
• Overall length (0.470" / 11.94mm)

Material & Environmental Parameters:

• Contact material (Copper Alloy)
• Contact finish (Gold)
• Operating temperature range (-40°C to 85°C)
• Mechanical and electrical life (2,000 cycles minimum)

The 90B04ST meets all specified parameters and qualifies as a direct substitute. The primary distinction between these parts is product status and compliance certification, not functional or mechanical characteristics.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Long-Term Applications: The 90B04ST is the appropriate selection. This part maintains identical electrical and mechanical specifications to the 90MB04S while offering active product status, ROHS3 compliance, and improved moisture sensitivity level (MSL 1 vs. MSL 3). These characteristics ensure regulatory alignment and extended shelf life without environmental conditioning requirements.

For Legacy System Maintenance: The 90MB04S remains functionally equivalent and may be retained for existing installations where RoHS compliance is not mandated and immediate replacement is not required. However, procurement should transition to 90B04ST for continuity planning.

Compliance Considerations: The 90B04ST satisfies modern regulatory requirements including ROHS3 compliance and REACH unaffected status. Organizations subject to RoHS directives or requiring long-term component availability should prioritize 90B04ST for all new procurement.

Frequently Asked Questions (FAQ)

Q: Can the 90B04ST directly replace the 90MB04S in existing PCB designs?

A: Yes. The 90B04ST is mechanically and electrically identical to the 90MB04S. All footprint dimensions, pin spacing, height above board, and electrical ratings are equivalent. No PCB redesign is required.

Q: What is the primary reason for substitution?

A: The 90MB04S is classified as obsolete. The 90B04ST is the active equivalent from the same manufacturer, ensuring ongoing availability and supply chain continuity.

Q: Are there compliance differences between these parts?

A: Yes. The 90B04ST is ROHS3 compliant, while the 90MB04S is non-compliant. The 90B04ST also features improved moisture sensitivity (MSL 1 vs. MSL 3), eliminating the need for controlled storage conditions.

Q: Does packaging differ between these parts?

A: Yes. The 90MB04S uses tape seal packaging, while the 90B04ST is supplied in tube packaging. This difference does not affect electrical or mechanical performance.

Q: Are the electrical specifications identical?

A: Yes. Both parts are rated for 25mA at 24VDC, feature SPST configuration with 4 positions, and support identical operating temperature ranges (-40°C to 85°C) and mechanical/electrical life cycles (2,000 cycles).

Q: Can I use 90B04ST in applications originally designed for 90MB04S?

A: Yes. The 90B04ST is a direct functional equivalent with superior compliance and storage characteristics. No application modifications are necessary.

Q: What is the difference in moisture sensitivity level?

A: The 90MB04S has MSL 3 (168-hour shelf life under controlled conditions), while the 90B04ST has MSL 1 (unlimited shelf life). This means 90B04ST requires no special moisture control during storage or handling.