Grayhill 90B04S DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 90B04S is a 4-position slide actuator DIP switch with SPST circuit configuration, rated for 25mA at 24VDC. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The 90B04S features through-hole mounting with PC pin termination, gold-plated copper alloy contacts, and operates across the industrial temperature range of -40°C to 85°C. Due to its obsolete status, direct substitutes with active product availability are required for new procurement and design refresh applications.

Substiute Parts

90B04S

Grayhill Inc.In Stock: 123490B04S Datasheet

Current PartRFQ

90B04ST

Grayhill Inc.In Stock: 391390B04ST Datasheet

DirectRFQ

209-4LPST

CTS ElectrocomponentsIn Stock: 5341209-4LPST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 90B04S is determined by strict equivalence across the following critical parameters: circuit configuration (SPST), number of positions (4), mounting type (through hole), termination style (PC pin), pitch (0.100"), and operating temperature range (-40°C to 85°C). Current and voltage ratings establish the upper operational limits; substitute parts must meet or exceed the original specification to ensure functional compatibility.

Two substitute parts are identified:

90B04ST (Grayhill Inc.): Identical electrical and mechanical specifications to the 90B04S with matching current (25mA), voltage (24VDC), and physical dimensions. The primary distinction is product status: 90B04ST is active with RoHS3 compliance, whereas 90B04S is obsolete and RoHS non-compliant. Packaging differs (tube versus standard), but electrical performance is equivalent.

209-4LPST (CTS Electrocomponents): Meets core substitution criteria for circuit (SPST), positions (4), mounting (through hole), termination (PC pin), and pitch (0.100"). However, electrical ratings differ: 100mA current and 20VDC voltage exceed the original 25mA/24VDC specification. Physical dimensions vary slightly (height 0.180" vs. 0.195", length 0.458" vs. 0.470"). Contact material is beryllium copper rather than copper alloy. This part functions as a higher-capacity alternative suitable for applications where increased electrical headroom is acceptable.

Parameter Comparison

Engineering Selection Recommendations

90B04ST Selection Criteria: This part is the direct functional equivalent of the 90B04S and is the preferred substitute for applications requiring exact electrical and mechanical compatibility. The 90B04ST maintains identical current (25mA) and voltage (24VDC) ratings, physical dimensions, and contact specifications. Active product status ensures long-term availability. RoHS3 compliance satisfies modern regulatory requirements, whereas the original 90B04S does not. Selection of 90B04ST is appropriate for direct replacement in existing designs without circuit modification.

209-4LPST Selection Criteria: This CTS Electrocomponents part functions as a higher-capacity alternative when design margins permit. The 100mA current rating and 20VDC voltage rating exceed the original specification, providing operational headroom for applications with variable load conditions. Slight dimensional variations (0.180" height, 0.458" length) require PCB layout verification to confirm mechanical fit. The beryllium copper contact material offers enhanced durability compared to standard copper alloy. RoHS3 compliance is confirmed. Selection of 209-4LPST is appropriate when increased electrical capacity and contact longevity justify minor dimensional differences and cross-manufacturer sourcing.

Frequently Asked Questions (FAQ)

Q: Can the 90B04ST directly replace the 90B04S without circuit modification?

A: Yes. The 90B04ST is electrically and mechanically identical to the 90B04S across all critical parameters: 25mA current rating, 24VDC voltage rating, 4-position SPST configuration, through-hole mounting, PC pin termination, and 0.100" pitch. No circuit redesign is required. The primary difference is product status (active versus obsolete) and RoHS compliance.

Q: What are the key differences between 90B04ST and 209-4LPST?

A: Both parts share the same circuit topology (SPST), position count (4), mounting type (through hole), and pitch (0.100"). The 209-4LPST differs in current capacity (100mA versus 25mA), voltage rating (20VDC versus 24VDC), contact material (beryllium copper versus copper alloy), and physical dimensions (height 0.180" versus 0.195", length 0.458" versus 0.470"). The 209-4LPST is manufactured by CTS Electrocomponents rather than Grayhill Inc.

Q: Is the 209-4LPST suitable for applications originally designed for the 90B04S?

A: The 209-4LPST is functionally compatible for SPST 4-position switching applications with through-hole mounting. However, the higher current rating (100mA) and lower voltage rating (20VDC) represent different electrical operating points. Applications operating at or near the original 25mA/24VDC specification will function correctly with the 209-4LPST. PCB layout must accommodate the slightly smaller physical dimensions. Cross-manufacturer sourcing introduces supply chain considerations.

Q: What is the impact of RoHS compliance on part selection?

A: The 90B04S is RoHS non-compliant, whereas both 90B04ST and 209-4LPST are RoHS3 compliant. For applications subject to RoHS regulations or customer requirements, 90B04ST or 209-4LPST must be selected. For legacy systems without RoHS mandates, the 90B04S remains functional but is obsolete and subject to inventory depletion.

Q: Are there packaging considerations when substituting these parts?

A: The 90B04S uses standard packaging, while 90B04ST and 209-4LPST are supplied in tube packaging. Tube packaging is standard for active production parts and does not affect component functionality. Procurement and handling procedures may differ between packaging formats.

Q: What is the mechanical life expectancy of these DIP switches?

A: The 90B04S and 90B04ST specify 2,000 mechanical cycles. The 209-4LPST does not provide mechanical life data in the available specifications. All three parts specify 2,000 electrical cycles. Mechanical life refers to actuator movement cycles; electrical life refers to switch contact engagement cycles under load.