Equivalent & Substitute Parts for Grayhill 90B02S DIP Switch

Part Overview

The Grayhill 90B02S is a single-pole single-throw (SPST) slide DIP switch designed for 25mA at 24VDC applications. This component features a through-hole mounting configuration with a standard slide actuator, copper alloy contacts with gold finish, and operates across an industrial temperature range of -40°C to 85°C. The 90B02S is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production support.

Substiute Parts

90B02S

Grayhill Inc.In Stock: 93490B02S Datasheet

Current PartRFQ

90B02ST

Grayhill Inc.In Stock: 72190B02ST Datasheet

DirectRFQ

209-2LPST

CTS ElectrocomponentsIn Stock: 4450209-2LPST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 90B02S is determined by strict compatibility across electrical and mechanical parameters. The primary substitute must maintain identical circuit topology (SPST), position count (2), actuator style (slide standard), mounting method (through hole), and pitch spacing (0.100"). Electrical parameters including current and voltage ratings establish the operational envelope; substitutes must support the specified 25mA at 24VDC or higher ratings to ensure functional compatibility.

The 90B02ST from Grayhill Inc. qualifies as a direct substitute, sharing all critical electrical and mechanical specifications with the obsolete 90B02S while offering active product status and improved compliance posture. The 209-2LPST from CTS Electrocomponents represents a secondary alternative with elevated electrical ratings (100mA at 20VDC) that accommodate the 90B02S application requirements while introducing minor dimensional variations.

Parameter Comparison

Engineering Selection Recommendations

90B02ST (Grayhill Inc.) is the primary recommended substitute for the obsolete 90B02S. This part maintains complete electrical and mechanical compatibility with identical current (25mA), voltage (24VDC), and dimensional specifications. The 90B02ST carries active product status, ensuring long-term availability and supply chain stability. Critically, the 90B02ST achieves ROHS3 compliance, addressing regulatory requirements that the non-compliant 90B02S cannot satisfy. For applications requiring immediate substitution with minimal design modification, the 90B02ST provides direct form-fit-function replacement.

209-2LPST (CTS Electrocomponents) serves as a secondary alternative for applications where elevated electrical ratings provide design margin. This part supports 100mA at 20VDC, exceeding the 90B02S requirements of 25mA at 24VDC. The 209-2LPST features beryllium copper contacts and includes epoxy sealed terminals, offering enhanced environmental protection. Minor dimensional differences (0.180" height versus 0.195", 0.258" length versus 0.270") require PCB layout verification. The 209-2LPST is ROHS3 compliant and maintains active product status. Selection of this part is appropriate when design specifications accommodate the dimensional variations and when the elevated current rating provides operational benefit.

Frequently Asked Questions (FAQ)

Q: Can the 90B02ST directly replace the 90B02S without PCB modification?

A: Yes. The 90B02ST maintains identical pitch (0.100"), height above board (0.195"), length (0.270"), and termination style (PC Pin) as the 90B02S. No PCB layout changes are required for direct substitution.

Q: What is the primary advantage of selecting 90B02ST over 209-2LPST?

A: The 90B02ST is manufactured by Grayhill Inc., the original 90B02S manufacturer, ensuring design continuity and identical electrical specifications (25mA at 24VDC). The 209-2LPST introduces dimensional variations and different contact material (beryllium copper versus copper alloy), requiring design verification despite functional compatibility.

Q: Does the 209-2LPST work in applications designed for 24VDC operation?

A: The 209-2LPST is rated for 20VDC maximum. In applications operating at 24VDC, this part exceeds its voltage specification and is not suitable. The 90B02ST is the appropriate choice for 24VDC circuits.

Q: Are there compliance differences between the 90B02S and its substitutes?

A: Yes. The 90B02S is RoHS non-compliant. Both the 90B02ST and 209-2LPST are ROHS3 compliant. For applications subject to RoHS regulations, either substitute satisfies compliance requirements while the original part does not.

Q: What packaging options are available for these parts?

A: The 90B02S was supplied in standard packaging. The 90B02ST and 209-2LPST are supplied in tube packaging, which is standard for DIP switch distribution and compatible with automated assembly processes.

Q: How do the mechanical life ratings compare?

A: The 90B02S specifies 2,000 mechanical cycles. The 90B02ST maintains this specification at 2,000 cycles. The 209-2LPST does not provide a mechanical life specification in the available data, though electrical life is rated at 2,000 cycles.

Q: Can I use the 209-2LPST in a 25mA application?

A: Yes. The 209-2LPST is rated for 100mA, which exceeds the 25mA requirement. However, verify that your circuit operates at 20VDC or below, as the 209-2LPST voltage rating is 20VDC, not 24VDC.