Equivalent & Substitute Parts for 90HBW08P DIP Switch

Part Overview

The 90HBW08P is an 8-position surface mount DIP switch manufactured by Grayhill Inc., featuring SPST (Single Pole Single Throw) circuit configuration with 25mA current rating at 24VDC. This component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is essential for design continuity, production support, and long-term component availability in applications requiring SPST DIP switch functionality with comparable electrical and mechanical specifications.

Key Parameters

Parameter	Value
Circuit Configuration	SPST
Number of Positions	8
Current Rating	25mA
Voltage Rating	24VDC
Actuator Type	Slide (Standard)
Mounting Type	Surface Mount
Pitch	0.100" (2.54mm)
Contact Material	Copper Alloy
Contact Finish	Gold
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 90HBW08P is determined by the following critical parameters: SPST circuit configuration, 8-position count, surface mount mounting type, 0.100" pitch, slide actuator type, and gold-plated contact finish. These parameters define the functional and physical compatibility envelope for direct substitution.

Group 1: Direct Functional Equivalent The 90HBW08PT meets all critical substitution criteria. It shares identical circuit configuration (SPST), position count (8), mounting type (surface mount), pitch (0.100"), actuator type (slide standard), contact material (copper alloy), contact finish (gold), and operating temperature range (-40°C ~ 85°C). The primary distinction is product status: 90HBW08PT is active, whereas 90HBW08P is obsolete. Packaging differs (tube for 90HBW08PT versus dash for 90HBW08P), but this does not affect functional compatibility.

Group 2: Functional Substitute with Parameter Variations The 219-8LPST from CTS Electrocomponents provides SPST circuit configuration with 8 positions and surface mount mounting at 0.100" pitch. However, this substitute introduces electrical parameter variations: current rating increases to 100mA (versus 25mA), voltage rating decreases to 20VDC (versus 24VDC), and contact material changes to beryllium copper. Operating temperature range extends to -55°C minimum. These variations require application-level verification to confirm compatibility within the target circuit's electrical requirements.

Parameter Comparison

Parameter	90HBW08P (Main)	90HBW08PT (Substitute)	219-8LPST (Substitute)
Manufacturer	Grayhill Inc.	Grayhill Inc.	CTS Electrocomponents
Product Status	Obsolete	Active	Active
Circuit	SPST	SPST	SPST
Number of Positions	8	8	8
Current Rating (Amps)	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	0.190" (4.83mm)	0.190" (4.83mm)	0.160" (4.06mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Termination Style	Gull Wing	Gull Wing	Gull Wing
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 85°C
Mechanical Life	2,000 Cycles	2,000 Cycles	Not Specified
Electrical Life	2,000 Cycles	2,000 Cycles	2,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99

Engineering Selection Recommendations

For Direct Replacement (90HBW08PT): The 90HBW08PT is the primary substitute for the obsolete 90HBW08P. Both components are manufactured by Grayhill Inc. within the same 90HB series, share identical electrical ratings (25mA at 24VDC), and maintain equivalent mechanical specifications. The 90HBW08PT holds active product status with significantly higher inventory availability (7,885 pcs versus 916 pcs for the main part). Both components meet ROHS3 compliance and REACH unaffected status. Selection of 90HBW08PT eliminates obsolescence risk while preserving full functional and physical compatibility. Packaging format (tube) differs from the main part but does not affect component performance or PCB assembly compatibility.

For Extended Operating Range (219-8LPST): The 219-8LPST from CTS Electrocomponents provides an alternative when extended low-temperature operation (-55°C minimum versus -40°C) is required. This substitute maintains SPST 8-position configuration with identical pitch and surface mount mounting. However, electrical parameter differences must be evaluated: the 219-8LPST supports higher current (100mA versus 25mA) and lower voltage (20VDC versus 24VDC). Applications operating at 24VDC cannot use this substitute. Applications operating at 20VDC or lower with current requirements up to 100mA may consider this option. The 219-8LPST offers superior moisture sensitivity (MSL 1 unlimited versus MSL 3 168 hours) and maintains ROHS3 compliance and REACH unaffected status. Height above board is reduced (0.160" versus 0.190"), which may affect PCB layout considerations.

Frequently Asked Questions (FAQ)

Q: Can 90HBW08PT be used as a direct replacement for 90HBW08P without circuit modification?

A: Yes. The 90HBW08PT is a direct functional equivalent. Both components share identical SPST circuit configuration, 8-position count, 25mA current rating, 24VDC voltage rating, surface mount mounting type, 0.100" pitch, slide actuator type, and operating temperature range (-40°C ~ 85°C). The only differences are product status (active versus obsolete) and packaging format (tube versus dash). No circuit modification is required.

Q: What are the limitations of using 219-8LPST as a substitute?

A: The 219-8LPST introduces two critical electrical parameter changes: voltage rating decreases from 24VDC to 20VDC, and current rating increases from 25mA to 100mA. Applications designed for 24VDC operation cannot use this substitute. The substitute is suitable only for circuits operating at 20VDC or lower. Additionally, the 219-8LPST has a reduced height above board (0.160" versus 0.190"), which may require PCB layout verification. Mechanical life specification is not provided for the 219-8LPST.

Q: Are all three parts RoHS and REACH compliant?

A: Yes. The 90HBW08P, 90HBW08PT, and 219-8LPST are all ROHS3 compliant and REACH unaffected. All three components meet current environmental and regulatory requirements for electronic component manufacturing and use.

Q: What is the difference in moisture sensitivity between the substitutes?

A: The 90HBW08P and 90HBW08PT both have MSL 3 rating (168 hours maximum floor life). The 219-8LPST has MSL 1 rating (unlimited floor life). MSL 1 provides superior moisture tolerance and eliminates bake-out requirements for extended storage. This is an advantage of the 219-8LPST for supply chain and inventory management, provided electrical parameters are compatible with the application.

Q: Can packaging format affect component selection?

A: Packaging format (tube versus dash) does not affect component electrical performance or PCB assembly compatibility. The 90HBW08PT is supplied in tube packaging, while the original 90HBW08P uses dash packaging. Modern pick-and-place assembly equipment accommodates both formats. Packaging selection may be driven by inventory management, feeder compatibility, or supplier availability rather than technical requirements.

Q: What is the mechanical life specification for 219-8LPST?

A: Mechanical life specification is not provided in the available data for the 219-8LPST. The 90HBW08P and 90HBW08PT both specify 2,000 mechanical cycles. When mechanical life is a critical design parameter, the 90HBW08PT is the recommended substitute to maintain specification consistency.

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