Equivalent & Substitute Parts for Grayhill 90B05S DIP Switch

Part Overview

The Grayhill 90B05S is a 5-position slide DIP switch with SPST circuit configuration, rated for 25mA at 24VDC. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement. The 90B05S features through-hole mounting with gold-plated copper alloy contacts, flush/recessed slide actuator, and operates across -40°C to 85°C temperature range. Due to its obsolete status, active production alternatives and compatible substitutes are required for new designs and legacy system maintenance.

Key Parameters

Parameter	Value	Significance for Substitution
Circuit Configuration	SPST	Defines switching topology; substitutes must maintain identical circuit type
Number of Positions	5	Determines switch array size and PCB footprint compatibility
Current Rating	25mA	Maximum load current; substitutes must meet or exceed this specification
Voltage Rating	24VDC	Maximum operating voltage; substitutes must support this level
Mounting Type	Through Hole	PCB assembly method; determines mechanical compatibility
Pitch	0.100" (2.54mm)	Center-to-center spacing between positions; critical for footprint alignment
Actuator Type	Slide (Standard)	User interface mechanism; must match for operational consistency
Height Above Board	0.195" (4.95mm)	Clearance requirement; affects enclosure design and component density
Termination Style	PC Pin	Electrical connection method; determines soldering compatibility

Substitute Part Grouping Explanation

Substitution eligibility for the 90B05S is determined by strict alignment with the following core parameters:

Primary Compatibility Criteria:

Circuit type must be SPST
Number of positions must be 5
Mounting type must be through-hole
Pitch must be 0.100" (2.54mm)
Actuator type must be slide (standard)
Termination style must be PC pin

Electrical Performance Criteria:

Current rating must be equal to or greater than 25mA
Voltage rating must be equal to or greater than 24VDC
Operating temperature range must encompass -40°C to 85°C

Mechanical Compatibility Criteria:

Height above board must not exceed 0.195" (4.95mm) to maintain clearance compatibility
Contact material and finish should support equivalent reliability

Two substitute parts meet these criteria with varying degrees of parameter alignment:

90B05ST (Grayhill Inc.): Direct manufacturer equivalent with identical electrical and mechanical specifications. Differs only in packaging format (tube vs. standard) and product status (active vs. obsolete). RoHS3 compliant.

209-5LPST (CTS Electrocomponents): Cross-manufacturer substitute with enhanced electrical performance (100mA at 20VDC vs. 25mA at 24VDC). Meets all primary compatibility criteria. Height specification (0.180") provides improved clearance margin. RoHS3 compliant.

Parameter Comparison

Parameter	90B05S (Main)	90B05ST (Substitute)	209-5LPST (Substitute)
Manufacturer	Grayhill Inc.	Grayhill Inc.	CTS Electrocomponents
Product Status	Obsolete	Active	Active
Circuit Configuration	SPST	SPST	SPST
Number of Positions	5	5	5
Current Rating	25mA	25mA	100mA
Voltage Rating	24VDC	24VDC	20VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)
Actuator Level	Flush, Recessed	Flush, Recessed	Flush, Recessed
Contact Material	Copper Alloy	Copper Alloy	Beryllium Copper
Contact Finish	Gold	Gold	Gold
Height Above Board	0.195" (4.95mm)	0.195" (4.95mm)	0.180" (4.57mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Washable	Yes	Yes	Yes
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Electrical Life	2,000 Cycles	2,000 Cycles	2,000 Cycles
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Standard	Tube	Tube

Engineering Selection Recommendations

For Direct Replacement (Preferred): The 90B05ST is the primary substitute for the obsolete 90B05S. Both components are manufactured by Grayhill Inc. and share identical electrical and mechanical specifications. The 90B05ST is currently in active production status with 1600 units in stock. The transition from standard to tube packaging does not affect functional performance. The 90B05ST achieves ROHS3 compliance, addressing regulatory requirements that the original 90B05S does not meet. This substitute requires no circuit redesign and maintains full pin-for-pin compatibility.

For Cross-Manufacturer Substitution: The CTS Electrocomponents 209-5LPST provides an alternative when Grayhill 90B05ST availability is constrained. This substitute meets all primary compatibility criteria and offers enhanced electrical performance with 100mA current rating versus the original 25mA specification. The 209-5LPST operates at 20VDC maximum voltage, which is compatible with 24VDC circuit designs operating below this threshold. The reduced height above board (0.180" vs. 0.195") provides additional clearance margin. Contact material differs (beryllium copper vs. copper alloy), which does not affect functional compatibility. The 209-5LPST is ROHS3 compliant and currently in active production with 5707 units in stock.

Compliance Considerations: Both substitute parts achieve ROHS3 compliance, addressing environmental and regulatory requirements. The original 90B05S is RoHS non-compliant. Selection of either substitute aligns with current regulatory standards for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can the 90B05ST directly replace the 90B05S without circuit modification?

A: Yes. The 90B05ST is electrically and mechanically identical to the 90B05S. Pin configuration, electrical ratings, and physical dimensions are equivalent. The only difference is packaging format (tube vs. standard) and product status (active vs. obsolete). No circuit redesign is required.

Q: What is the key difference between the 90B05ST and 209-5LPST substitutes?

A: The 90B05ST is a direct Grayhill equivalent with identical specifications. The 209-5LPST is a cross-manufacturer substitute from CTS Electrocomponents with enhanced current rating (100mA vs. 25mA) and slightly reduced height above board (0.180" vs. 0.195"). Both meet all primary compatibility criteria for the 90B05S.

Q: Is the 209-5LPST suitable for 24VDC applications?

A: The 209-5LPST is rated for 20VDC maximum. In applications requiring 24VDC operation, the 90B05ST is the appropriate choice. The 209-5LPST is suitable for circuits operating at 20VDC or lower.

Q: Does the beryllium copper contact material in the 209-5LPST affect compatibility?

A: No. Beryllium copper provides equivalent electrical performance and reliability compared to the copper alloy contacts in the 90B05S and 90B05ST. Contact material difference does not impact functional compatibility or circuit performance.

Q: Are both substitutes RoHS compliant?

A: Yes. Both the 90B05ST and 209-5LPST are ROHS3 compliant. The original 90B05S is RoHS non-compliant. Substitution with either part addresses regulatory compliance requirements.

Q: What is the impact of tube packaging on component handling?

A: Tube packaging affects procurement and inventory management but does not impact electrical or mechanical performance. Both substitutes are supplied in tube packaging, which is standard for high-volume component distribution.

Q: Can the 209-5LPST be used in applications where the 90B05S was originally specified?

A: The 209-5LPST is compatible with applications operating at 20VDC or lower. For applications specifically requiring 24VDC operation, the 90B05ST is the appropriate substitute. The 209-5LPST's enhanced current rating (100mA) makes it suitable for higher-load applications within its voltage specification.

Q: What is the mechanical life specification for the substitute parts?

A: The 90B05ST specifies 2,000 mechanical cycles, identical to the 90B05S. The 209-5LPST does not provide a mechanical life specification in the available data, but electrical life is specified at 2,000 cycles.

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