SDA04H0KD Equivalent & Substitute Parts

Part Overview

The SDA04H0KD is a DIP slide switch manufactured by C&K, featuring SPST (Single Pole Single Throw) configuration with 4 positions, rated for 25mA at 24VDC. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations. The SDA04H0KD remains functionally available through direct substitutes that maintain electrical and mechanical compatibility while offering improved product status and compliance certifications.

Key Parameters

Parameter	Value
Circuit Configuration	SPST
Number of Positions	4
Current Rating	25mA
Voltage Rating	24VDC
Actuator Type	Slide (Standard)
Mounting Type	Through Hole
Pitch	0.100" (2.54mm)
Termination Style	PC Pin
Contact Material	Beryllium Copper / Copper Alloy
Contact Finish	Gold
Mechanical Life	1,000 Cycles
Electrical Life	1,000 Cycles

Substitute Part Grouping Explanation

Substitution for the SDA04H0KD is determined by strict equivalence across the following critical parameters:

Circuit configuration (SPST)
Number of positions (4)
Current and voltage ratings (25mA, 24VDC)
Actuator type and actuation method (Slide, Standard)
Mounting configuration (Through Hole, PC Pin termination)
Pitch spacing (0.100" / 2.54mm)
Contact material and finish (Gold-plated)
Mechanical and electrical life ratings (1,000 Cycles)

The SDA04H0BD (C&K) qualifies as a direct manufacturer substitute, maintaining identical electrical specifications and mechanical form factor while offering active product status and improved compliance. The 1825002-5 (TE Connectivity ALCOSWITCH) functions as a cross-manufacturer equivalent, meeting all core electrical and mechanical requirements with additional washable capability.

Parameter Comparison

Parameter	SDA04H0KD (Main)	SDA04H0BD (C&K)	1825002-5 (TE Connectivity)
Manufacturer	C&K	C&K	TE Connectivity ALCOSWITCH
Product Status	Obsolete	Active	Active
Circuit	SPST	SPST	SPST
Positions	4	4	4
Current Rating	25mA	25mA	25mA
Voltage Rating	24VDC	24VDC	24VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)
Height Above Board	0.189" (4.80mm)	0.183" (4.65mm)	0.189" (4.80mm)
Length	0.476" (12.09mm)	0.476" (12.09mm)	0.478" (12.14mm)
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Material	Beryllium Copper	Beryllium Copper	Copper Alloy
Contact Finish	Gold	Gold	Gold
Mounting Type	Through Hole	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin	PC Pin
Operating Temperature	-20°C ~ 85°C	-40°C ~ 85°C	-30°C ~ 85°C
Body Material	Polyphthalamide (PPA)	Polyphenylene Sulfide (PPS)	Polyphenylene Sulfide (PPS)
Mechanical Life	1,000 Cycles	1,000 Cycles	1,000 Cycles
Electrical Life	1,000 Cycles	1,000 Cycles	1,000 Cycles
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant
Washable	No	No	Yes
Packaging	-	Tube	Tube

Engineering Selection Recommendations

The SDA04H0BD represents the primary substitute for the obsolete SDA04H0KD. Both components share identical electrical specifications and mechanical form factors. The SDA04H0BD offers active product status, extended operating temperature range (-40°C to 85°C versus -20°C to 85°C), and ROHS3 compliance, making it suitable for new designs and legacy system replacements.

The 1825002-5 (TE Connectivity ALCOSWITCH) serves as a cross-manufacturer equivalent meeting all core electrical and mechanical requirements. This part provides ROHS3 compliance, extended operating temperature range (-30°C to 85°C), and washable capability. Minor dimensional variations exist: the 1825002-5 measures 0.478" in length compared to 0.476" for the C&K variants, and uses copper alloy contacts instead of beryllium copper. These differences remain within acceptable tolerances for standard through-hole DIP switch applications.

Frequently Asked Questions (FAQ)

Q: Can the SDA04H0BD directly replace the SDA04H0KD in existing designs?

A: Yes. The SDA04H0BD maintains identical electrical ratings (25mA, 24VDC, SPST, 4-position), actuator type (slide standard), mounting configuration (through-hole, PC pin), and pitch spacing (0.100"). The primary differences are product status (active versus obsolete) and compliance certifications (ROHS3 compliant). Height above board differs by 0.006" (0.15mm), which does not affect PCB layout compatibility.

Q: What are the key differences between the C&K SDA04H0BD and the TE Connectivity 1825002-5?

A: Both parts meet the core electrical and mechanical specifications of the SDA04H0KD. The 1825002-5 offers washable capability, which the C&K variants do not provide. Contact material differs: the 1825002-5 uses copper alloy versus beryllium copper in the C&K parts. Length varies by 0.002" (0.05mm). Operating temperature ranges differ slightly: SDA04H0BD operates from -40°C to 85°C, while the 1825002-5 operates from -30°C to 85°C.

Q: Are there compliance or certification differences between these substitutes?

A: The SDA04H0KD is RoHS non-compliant. Both substitute parts (SDA04H0BD and 1825002-5) are ROHS3 compliant. All three parts are REACH unaffected and carry EAR99 ECCN classification. Moisture sensitivity level is 1 (unlimited) for all variants.

Q: Does the washable feature of the 1825002-5 affect compatibility?

A: The washable capability of the 1825002-5 is an additional feature that does not impact electrical or mechanical compatibility. This feature is relevant only if the assembly process includes aqueous cleaning steps. For standard through-hole soldering without wash processes, this difference is not a limiting factor.

Q: What packaging options are available for these substitutes?

A: Both the SDA04H0BD and 1825002-5 are supplied in tube packaging. The original SDA04H0KD packaging specification is not provided in the technical data.

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