SDA08H0K DIP Switch SPST 8 Position Equivalent & Substitute Parts

Part Overview

The SDA08H0K is an 8-position DIP switch manufactured by C&K, featuring SPST (Single Pole Single Throw) circuit configuration with 25mA current rating at 24VDC. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The switch employs a slide actuator with through-hole mounting and gold-plated beryllium copper contacts suitable for washable applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	SDA08H0K
Manufacturer	C&K
Circuit Configuration	SPST
Number of Positions	8
Current Rating	25mA
Voltage Rating	24VDC
Actuator Type	Slide (Standard)
Mounting Type	Through Hole
Pitch	0.100" (2.54mm)
Height Above Board	0.189" (4.80mm)
Termination Style	PC Pin
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the SDA08H0K is determined by strict equivalence across the following critical parameters:

Circuit configuration (SPST)
Number of positions (8)
Current rating (25mA minimum)
Voltage rating (24VDC)
Actuator type (Slide Standard)
Mounting type (Through Hole)
Pitch (0.100" / 2.54mm)
Termination style (PC Pin)

Substitute parts are grouped into two categories:

Direct Equivalents: Parts maintaining identical electrical and mechanical specifications with active product status and improved compliance profiles.

Functional Equivalents: Parts meeting all critical electrical and mechanical parameters but with variations in current rating or compliance certifications that do not compromise application performance.

Parameter Comparison

Parameter	SDA08H0K (Main)	SDA08H0B	1-1825002-3	1-1825002-4	1825428-4
Manufacturer	C&K	C&K	TE Connectivity ALCOSWITCH	TE Connectivity ALCOSWITCH	TE Connectivity ALCOSWITCH
Circuit	SPST	SPST	SPST	SPST	SPST
Positions	8	8	8	8	8
Current Rating	25mA	25mA	25mA	25mA	100mA
Voltage Rating	24VDC	24VDC	24VDC	24VDC	24VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)	Slide (Standard)	Slide (Standard)
Height Above Board	0.189" (4.80mm)	0.183" (4.65mm)	0.189" (4.80mm)	0.189" (4.80mm)	0.189" (4.80mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Termination Style	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin
Operating Temperature	-20°C ~ 85°C	-40°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C	-30°C ~ 85°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Non-compliant

Engineering Selection Recommendations

SDA08H0B is the primary direct equivalent for the SDA08H0K. This C&K part maintains identical electrical specifications (25mA, 24VDC, SPST, 8-position) with active product status and ROHS3 compliance. The minor height reduction (0.183" vs 0.189") and improved operating temperature range (-40°C to 85°C) present no compatibility issues for standard through-hole PCB applications. Body material change from polyphthalamide to polyphenylene sulfide provides enhanced chemical resistance.

1-1825002-3 and 1-1825002-4 are TE Connectivity ALCOSWITCH functional equivalents meeting all critical electrical and mechanical parameters. Both maintain 25mA current rating and 24VDC voltage specification with ROHS3 compliance (1-1825002-3) or active status (1-1825002-4). These parts are suitable for applications where TE Connectivity sourcing is preferred or required.

1825428-4 is a higher-current variant (100mA) from TE Connectivity suitable only for applications where increased current capacity is beneficial or required. This part is not RoHS compliant and should be selected only when the 100mA rating provides specific design advantages over the 25mA specification.

Frequently Asked Questions (FAQ)

Q: Can SDA08H0B directly replace SDA08H0K without PCB modification?

A: Yes. The SDA08H0B maintains identical pitch (0.100"), termination style (PC Pin), and mounting type (Through Hole). The height difference of 0.006" (0.15mm) does not require PCB layout changes for standard applications.

Q: What is the primary reason to substitute the SDA08H0K?

A: The SDA08H0K is obsolete. SDA08H0B provides active product status with improved compliance (ROHS3) and extended operating temperature range while maintaining electrical equivalence.

Q: Are TE Connectivity parts (1-1825002 series) pin-compatible with C&K parts?

A: Yes. Both manufacturers' 8-position DIP switches with 0.100" pitch and PC Pin termination share identical footprints and pinout configurations for SPST applications.

Q: When should 1825428-4 be selected over other substitutes?

A: Select 1825428-4 only when application requirements exceed 25mA current capacity. The 100mA rating provides design margin for higher-load switching applications. Standard 25mA applications should use SDA08H0B, 1-1825002-3, or 1-1825002-4.

Q: What packaging options are available for these substitutes?

A: SDA08H0B is supplied in Tube packaging. TE Connectivity parts are available in Tube (1-1825002-3, 1825428-4) or Bulk (1-1825002-4) packaging. Packaging selection does not affect electrical or mechanical compatibility.

Q: Are all substitutes washable?

A: Yes. All listed substitutes include washable design with tape seal features (where specified), maintaining compatibility with conformal coating and aqueous cleaning processes.

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