Grayhill 90B07S DIP Switch Equivalent & Substitute Parts

Part Overview

The Grayhill 90B07S is a 7-position slide DIP switch with SPST circuit configuration, rated for 25mA at 24VDC. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 90B07S features through-hole mounting with PC pin termination, gold-plated copper alloy contacts, and operates across -40°C to 85°C. Identifying compatible alternatives ensures design flexibility while maintaining electrical and mechanical performance requirements.

Key Parameters

Parameter	Value	Significance for Substitution
Circuit Configuration	SPST	Defines switching topology; substitutes must maintain identical circuit type
Number of Positions	7	Determines switch array size; must match for pin-compatible replacement
Current Rating	25mA	Maximum load current; substitutes must meet or exceed this specification
Voltage Rating	24VDC	Maximum operating voltage; substitutes must support this voltage level
Actuator Type	Slide (Standard)	User interface; must match for mechanical compatibility
Mounting Type	Through Hole	PCB assembly method; affects board layout and assembly process
Pitch	0.100" (2.54mm)	Pin spacing; critical for PCB footprint compatibility
Operating Temperature	-40°C to 85°C	Environmental operating range; substitutes must cover this range

Substitute Part Grouping Explanation

Substitute parts for the 90B07S are categorized based on functional equivalence and compatibility criteria:

Direct Equivalents maintain identical electrical ratings (25mA, 24VDC), circuit configuration (SPST), position count (7), and mechanical form factor. These parts are interchangeable with minimal or no design modification.

Functional Alternatives share the same circuit topology, position count, and pitch but may differ in current or voltage ratings, mounting technology, or packaging. These require design review to confirm suitability within the application's electrical constraints.

Key Substitution Criteria:

SPST circuit configuration (mandatory)
7-position switch array (mandatory)
0.100" (2.54mm) pitch (mandatory for PCB compatibility)
Current rating ≥ 25mA (minimum requirement)
Voltage rating ≥ 24VDC (minimum requirement)
Slide actuator type (preferred for mechanical compatibility)
Operating temperature range encompassing -40°C to 85°C (mandatory)

Parameter Comparison

Parameter	90B07S (Main)	90B07ST (Direct)	209-7LPST (Functional)	3-1825059-6 (Functional)
Manufacturer	Grayhill Inc.	Grayhill Inc.	CTS Electrocomponents	TE Connectivity ALCOSWITCH
Circuit	SPST	SPST	SPST	SPST
Positions	7	7	7	7
Current Rating	25mA	25mA	100mA	25mA
Voltage Rating	24VDC	24VDC	20VDC	24VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)	Slide (Standard)
Mounting Type	Through Hole	Through Hole	Through Hole	Surface Mount
Termination Style	PC Pin	PC Pin	PC Pin	Gull Wing
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Height Above Board	0.195" (4.95mm)	0.195" (4.95mm)	0.180" (4.57mm)	0.177" (4.50mm)
Contact Material	Copper Alloy	Copper Alloy	Beryllium Copper	Copper Alloy
Contact Finish	Gold	Gold	Gold	Gold
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-30°C to 85°C
Mechanical Life	2,000 Cycles	2,000 Cycles	Not Specified	1,000 Cycles
Electrical Life	2,000 Cycles	2,000 Cycles	2,000 Cycles	1,000 Cycles
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

90B07ST (Grayhill Inc.) - Recommended Direct Replacement

The 90B07ST is the optimal substitute for the obsolete 90B07S. Both parts are manufactured by Grayhill Inc. and share identical electrical specifications (25mA, 24VDC), circuit configuration (SPST), position count (7), and mechanical dimensions. The 90B07ST maintains the same through-hole PC pin termination, pitch (0.100"), and operating temperature range (-40°C to 85°C). The primary distinction is product status: the 90B07ST is active and ROHS3 compliant, whereas the 90B07S is obsolete and RoHS non-compliant. This part requires no design modification and provides direct pin-for-pin compatibility.

209-7LPST (CTS Electrocomponents) - Functional Alternative with Higher Current Rating

The 209-7LPST is a functional alternative suitable for applications where higher current capacity is beneficial. This part maintains SPST configuration, 7 positions, 0.100" pitch, and through-hole mounting with PC pin termination. The 209-7LPST is rated for 100mA at 20VDC, exceeding the 90B07S current requirement (25mA) but operating at a lower voltage rating (20VDC versus 24VDC). The operating temperature range (-40°C to 85°C) matches the main part. The 209-7LPST is ROHS3 compliant and active. Design review is required to confirm that the 20VDC rating is acceptable for the application; if the circuit operates at 24VDC, this part is not suitable.

3-1825059-6 (TE Connectivity ALCOSWITCH) - Functional Alternative with Surface Mount Technology

The 3-1825059-6 is a functional alternative for applications transitioning to surface mount assembly. This part maintains SPST configuration, 7 positions, 0.100" pitch, and identical electrical ratings (25mA, 24VDC). The primary differences are mounting technology (surface mount versus through hole) and termination style (gull wing versus PC pin). The operating temperature range is -30°C to 85°C, which does not extend to -40°C. Mechanical and electrical life ratings are lower (1,000 cycles versus 2,000 cycles). This part is ROHS3 compliant and active. Selection requires PCB redesign to accommodate surface mount footprint and gull wing termination.

Frequently Asked Questions (FAQ)

Q: Can the 90B07ST directly replace the 90B07S without PCB modification?

A: Yes. The 90B07ST is a direct pin-for-pin replacement. Both parts share identical pitch (0.100"), height above board (0.195"), through-hole PC pin termination, and electrical specifications (25mA, 24VDC, SPST, 7 positions). No PCB layout changes are required.

Q: Is the 209-7LPST suitable as a substitute if the application operates at 24VDC?

A: No. The 209-7LPST is rated for 20VDC maximum. Operating this part at 24VDC exceeds its voltage specification and may cause premature failure or unsafe operation. This part is suitable only for applications operating at 20VDC or lower.

Q: What is the primary advantage of the 209-7LPST over the 90B07S?

A: The 209-7LPST provides higher current capacity (100mA versus 25mA), making it suitable for applications requiring greater switching current. However, its lower voltage rating (20VDC) limits its use to lower-voltage circuits.

Q: Can the 3-1825059-6 be used in a through-hole PCB design?

A: No. The 3-1825059-6 is designed for surface mount assembly with gull wing termination. It cannot be installed in through-hole PCB designs without significant board redesign and assembly process changes.

Q: Does the 3-1825059-6 operate across the full temperature range of the 90B07S?

A: No. The 3-1825059-6 operates from -30°C to 85°C, whereas the 90B07S operates from -40°C to 85°C. The 3-1825059-6 does not support the lower temperature limit of -40°C. Applications requiring -40°C operation must use the 90B07ST or 209-7LPST.

Q: Are all substitute parts RoHS compliant?

A: The 90B07ST, 209-7LPST, and 3-1825059-6 are all ROHS3 compliant. The original 90B07S is RoHS non-compliant. If RoHS compliance is required, any of the three substitutes are acceptable from a regulatory standpoint.

Q: What is the mechanical life difference between the 90B07S and 3-1825059-6?

A: The 90B07S is rated for 2,000 mechanical cycles, while the 3-1825059-6 is rated for 1,000 cycles. Applications requiring frequent switch actuation may experience reduced service life with the 3-1825059-6.

Q: Can multiple substitute parts be used interchangeably within the same design?

A: No. Each substitute part has distinct electrical, mechanical, or packaging characteristics. Once a substitute is selected and validated for a specific application, it should be maintained throughout production to ensure consistency and avoid qualification issues.

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