TE Connectivity ALCOSWITCH 1825002-1 Equivalent & Substitute Parts

Part Overview

The TE Connectivity ALCOSWITCH 1825002-1 is a DIP slide switch with SPST (Single Pole Single Throw) configuration, rated for 25mA at 24VDC. This through-hole mounted component features a standard slide actuator with flush, recessed actuation level and is designed for applications requiring reliable switching in compact form factors. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for this switch category.

Key Parameters

Parameter	Value
Circuit Configuration	SPST
Number of Positions	2
Current Rating	25mA
Voltage Rating	24VDC
Actuator Type	Slide (Standard)
Actuator Level	Flush, Recessed
Mounting Type	Through Hole
Termination Style	PC Pin
Pitch	0.100" (2.54mm)
Height Above Board	0.189" (4.80mm)
Length	0.278" (7.06mm)
Body Material	Polyphenylene Sulfide (PPS)
Contact Finish	Gold
Operating Temperature Range	-30°C ~ 85°C
Mechanical Life	1,000 Cycles
Electrical Life	1,000 Cycles
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TE Connectivity ALCOSWITCH 1825002-1 are qualified based on electrical and mechanical parameter equivalence within the DIP slide switch category. The substitution criteria are:

Electrical Equivalence:

SPST circuit configuration
25mA current rating
24VDC voltage rating
1,000 cycles mechanical and electrical life

Mechanical Equivalence:

2-position slide actuator (standard type)
Flush, recessed actuation level
Through-hole mounting with PC pin termination
0.100" (2.54mm) pitch spacing
Polyphenylene Sulfide (PPS) body material
Gold contact finish

Compliance Equivalence:

RoHS3 compliance
MSL 1 (Unlimited) moisture sensitivity level

The C&K SDA series parts (SDA02H0B and SDA02H0BD) meet all core electrical and mechanical requirements for direct substitution. Minor variations in contact material (Beryllium Copper vs. Copper Alloy), height above board (0.183" vs. 0.189"), operating temperature range (-40°C vs. -30°C minimum), and washability do not preclude functional equivalence within the specified electrical and mechanical parameters.

Parameter Comparison

Parameter	TE Connectivity 1825002-1	C&K SDA02H0B	C&K SDA02H0BD
Manufacturer	TE Connectivity ALCOSWITCH	C&K	C&K
Circuit Configuration	SPST	SPST	SPST
Number of Positions	2	2	2
Current Rating (Amps)	25mA	25mA	25mA
Voltage Rating	24VDC	24VDC	24VDC
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)
Actuator Level	Flush, Recessed	Flush, Recessed	Flush, Recessed
Contact Material	Copper Alloy	Beryllium Copper	Beryllium Copper
Contact Finish	Gold	Gold	Gold
Height Above Board	0.189" (4.80mm)	0.183" (4.65mm)	0.183" (4.65mm)
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)
Body Material	Polyphenylene Sulfide (PPS)	Polyphenylene Sulfide (PPS)	Polyphenylene Sulfide (PPS)
Operating Temperature Range	-30°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mechanical Life	1,000 Cycles	1,000 Cycles	1,000 Cycles
Electrical Life	1,000 Cycles	1,000 Cycles	1,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Washable	Yes	Yes	No

Engineering Selection Recommendations

TE Connectivity ALCOSWITCH 1825002-1 is the primary specification for applications requiring the exact TE Connectivity ADF series component. This part is Active status with full RoHS3 compliance and unlimited moisture sensitivity rating.

C&K SDA02H0B is a direct functional equivalent with extended operating temperature range (-40°C minimum vs. -30°C) and tape seal feature. This part is Active status, RoHS3 compliant, and REACH Unaffected. The SDA02H0B is suitable for applications where the extended low-temperature performance and tape seal feature provide additional process or environmental benefits.

C&K SDA02H0BD is functionally equivalent with extended operating temperature range (-40°C minimum vs. -30°C). This part is Active status and RoHS3 compliant. The SDA02H0BD differs from SDA02H0B in that it is not washable and does not include tape seal features. Selection of this part is appropriate where washability is not a process requirement.

All three parts share identical electrical ratings (25mA, 24VDC, SPST), mechanical configuration (2-position slide actuator, through-hole PC pin termination, 0.100" pitch), and compliance certifications (RoHS3, MSL 1). The C&K alternatives provide equivalent performance within the specified electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can C&K SDA02H0B or SDA02H0BD be used as direct replacements for TE Connectivity 1825002-1?

A: Yes. Both C&K parts meet the core electrical parameters (25mA, 24VDC, SPST), mechanical configuration (2-position slide actuator, through-hole mounting, 0.100" pitch), and compliance requirements (RoHS3, MSL 1) of the TE Connectivity 1825002-1. The parts are functionally equivalent for applications within these specified parameters.

Q: What are the differences between SDA02H0B and SDA02H0BD?

A: The primary difference is washability. SDA02H0B is washable and includes tape seal features. SDA02H0BD is not washable and does not include tape seal features. Both parts are otherwise electrically and mechanically equivalent, with identical current rating (25mA), voltage rating (24VDC), operating temperature range (-40°C ~ 85°C), and mechanical/electrical life (1,000 cycles).

Q: Does the height above board difference (0.189" vs. 0.183") affect substitution?

A: The 0.006" (0.15mm) height difference is within typical PCB design tolerances for through-hole DIP switch applications. This variation does not preclude functional substitution when board clearance is adequate for the lower profile C&K parts.

Q: Are the C&K parts RoHS3 compliant?

A: Yes. Both SDA02H0B and SDA02H0BD are RoHS3 compliant, matching the compliance status of the TE Connectivity 1825002-1.

Q: What is the significance of the extended operating temperature range on C&K parts?

A: The C&K SDA series parts operate from -40°C to 85°C, compared to -30°C to 85°C for the TE Connectivity part. The extended low-temperature range provides additional margin for applications in cold environments, though both ranges cover standard industrial operating conditions.

Q: Can these parts be used interchangeably in existing designs?

A: Interchangeability is confirmed for applications where the specified electrical parameters (25mA, 24VDC, SPST), mechanical configuration (2-position slide actuator, through-hole PC pin, 0.100" pitch), and compliance requirements (RoHS3, MSL 1) are the design criteria. PCB layout verification is recommended to confirm adequate clearance for the slightly lower profile of C&K parts.

Q: What is the difference between Copper Alloy and Beryllium Copper contact materials?

A: Both materials provide gold-plated contact surfaces suitable for 25mA switching at 24VDC. Beryllium Copper offers enhanced spring properties and contact reliability. The material difference does not affect functional equivalence within the specified electrical parameters.

Q: Is REACH compliance status relevant for substitution?

A: The TE Connectivity 1825002-1 lists REACH status as Vendor Undefined, while both C&K parts are REACH Unaffected. For applications subject to REACH regulations, the C&K alternatives provide confirmed compliance status. This does not affect electrical or mechanical substitution criteria.

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