TE Connectivity ALCOSWITCH 435802-1 DIP Switch Equivalent & Substitute Parts

Part Overview

The TE Connectivity ALCOSWITCH 435802-1 is an 8-position SPST piano DIP switch rated for 25mA at 24VDC with through-hole, right-angle mounting. This component is classified as Active product status and is designed for applications requiring discrete switching control in industrial and commercial equipment. The switch features a raised piano actuator, copper alloy contacts with gold finish, and operates across a temperature range of -55°C to 105°C with a mechanical and electrical life rating of 7,000 cycles.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative compliance certifications are required (such as RoHS3 compliance), or when design modifications necessitate different actuator types or contact materials while maintaining functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Specification
Circuit Configuration	SPST (Single Pole Single Throw)
Number of Positions	8
Current Rating	25mA
Voltage Rating	24VDC
Actuator Type	Piano
Mounting Type	Through Hole, Right Angle
Pitch	0.100" (2.54mm)
Contact Finish	Gold
Operating Temperature Range	-55°C to 105°C
Termination Style	PC Pin

Substitute Part Grouping Explanation

Substitution of DIP switches is determined by strict equivalence across the following critical parameters: circuit configuration (SPST), number of positions (8), current rating (25mA), voltage rating (24VDC), pitch (0.100"), termination style (PC Pin), and mounting classification (through-hole). Parts are grouped into three categories based on actuator type and compliance status:

Direct Equivalent (Identical Specifications): Part 5435802-1 maintains all electrical and mechanical parameters of the main part while offering improved RoHS3 compliance and MSL rating.

Functional Equivalents with Piano Actuator: Parts KAP1108E and JS0308PP4-S provide identical circuit, position count, current, voltage, and pitch specifications with piano actuators. These parts differ in contact material, height above board, and operating temperature ranges but maintain functional compatibility for standard 24VDC switching applications.

Functional Equivalents with Slide Actuator: Parts KAS1108E, KAS1108ET, 206-8LPST, and 208-8LPST provide identical electrical ratings and pitch with slide-type actuators. These parts are suitable for applications where slide actuation is preferred over piano actuation, with variations in current rating, contact finish, and washability.

Limited Compatibility Part: Part 2-5435668-5 differs significantly in position count (6 vs. 8), current rating (60mA vs. 25mA), voltage rating (5VDC vs. 24VDC), and actuator type (rocker vs. piano), making it unsuitable as a direct substitute for standard 24VDC, 8-position applications.

Parameter Comparison

Part Number	Manufacturer	Circuit	Positions	Current (mA)	Voltage	Actuator Type	Height (mm)	Contact Finish	Temp Range (°C)	RoHS Status
435802-1	TE Connectivity	SPST	8	25	24VDC	Piano	7.37	Gold	-55 to 105	Non-compliant
5435802-1	TE Connectivity	SPST	8	25	24VDC	Piano	7.37	Gold	-55 to 105	ROHS3 Compliant
KAP1108E	E-Switch	SPST	8	25	24VDC	Piano	10.20	Gold	-40 to 85	ROHS3 Compliant
JS0308PP4-S	NKK Switches	SPST	8	25	24VDC	Piano	9.20	Gold	-25 to 70	ROHS3 Compliant
KAS1108E	E-Switch	SPST	8	25	24VDC	Slide	6.99	Gold	-40 to 85	ROHS3 Compliant
KAS1108ET	E-Switch	SPST	8	25	24VDC	Slide	6.99	Gold	-40 to 85	ROHS3 Compliant
206-8LPST	CTS Electrocomponents	SPST	8	50	24VDC	Slide	7.60	Gold	-55 to 85	ROHS3 Compliant
208-8LPST	CTS Electrocomponents	SPST	8	50	24VDC	Slide	7.60	Tin	-55 to 85	ROHS3 Compliant
2-5435668-5	TE Connectivity	SPST	6	60	5VDC	Rocker	7.37	Gold	-55 to 105	ROHS3 Compliant

Engineering Selection Recommendations

Primary Direct Substitute: Part 5435802-1 is the recommended direct substitute for 435802-1. This part maintains identical electrical specifications (25mA, 24VDC, 8-position SPST), mechanical configuration (piano actuator, through-hole right-angle mounting), and physical dimensions. The primary advantage is RoHS3 compliance and MSL rating of 1 (Unlimited), addressing regulatory requirements for new designs while preserving all functional characteristics of the original part.

Piano Actuator Alternatives: Parts KAP1108E (E-Switch) and JS0308PP4-S (NKK Switches) provide equivalent electrical performance with piano actuators. Both are RoHS3 compliant. KAP1108E offers a wider operating temperature range (-40°C to 85°C) and higher height above board (10.20mm). JS0308PP4-S operates within a narrower temperature range (-25°C to 70°C) with intermediate height (9.20mm). Selection between these parts depends on specific thermal and spatial constraints of the application.

Slide Actuator Alternatives: Parts KAS1108E, KAS1108ET, 206-8LPST, and 208-8LPST are suitable when slide actuation is functionally acceptable. KAS1108E and KAS1108ET (E-Switch) maintain the 25mA rating with lower profile (6.99mm height). KAS1108ET includes tape seal washability. Parts 206-8LPST and 208-8LPST (CTS Electrocomponents) support higher current (50mA) and include washability features, with 206-8LPST offering gold contact finish and 208-8LPST offering tin finish.

Non-Recommended Part: Part 2-5435668-5 is not suitable as a substitute due to incompatible specifications: 6 positions instead of 8, 60mA current rating instead of 25mA, 5VDC instead of 24VDC, and rocker actuator instead of piano. This part addresses a different application class and should not be considered for 435802-1 replacement.

Compliance Consideration: The original part 435802-1 is RoHS non-compliant. For new designs or applications requiring regulatory compliance, substitution with RoHS3-compliant alternatives (5435802-1, KAP1108E, JS0308PP4-S, KAS1108E, KAS1108ET, 206-8LPST, or 208-8LPST) is necessary.

Frequently Asked Questions (FAQ)

Q: Can part 5435802-1 be used as a direct replacement for 435802-1 in existing designs?

A: Yes. Part 5435802-1 is a direct equivalent with identical electrical ratings (25mA, 24VDC), circuit configuration (SPST, 8-position), actuator type (piano), and physical dimensions. The primary differences are improved RoHS3 compliance and MSL rating. No design modifications are required for substitution.

Q: What is the difference between piano and slide actuators in DIP switches?

A: Piano actuators feature individual raised keys for each position, allowing independent manual actuation of each switch position. Slide actuators use a single sliding mechanism to set all positions simultaneously. Selection depends on application requirements for individual versus grouped position control.

Q: Are parts KAS1108E and KAS1108ET interchangeable?

A: Both parts are electrically and mechanically identical with the same 25mA, 24VDC ratings and slide actuator configuration. The primary difference is that KAS1108ET includes tape seal washability features, while KAS1108E does not. Selection depends on whether moisture resistance is required for the application environment.

Q: Can CTS parts 206-8LPST and 208-8LPST be used in applications rated for 25mA?

A: These parts are rated for 50mA at 24VDC, which exceeds the 25mA requirement of the original part. They are electrically compatible with 25mA applications as they can safely handle lower current loads. The primary difference is contact finish: 206-8LPST uses gold finish, while 208-8LPST uses tin finish.

Q: What is the significance of the operating temperature range differences between substitute parts?

A: The original part 435802-1 operates from -55°C to 105°C. Substitute parts have narrower ranges: KAP1108E and KAS series operate from -40°C to 85°C, JS0308PP4-S operates from -25°C to 70°C, and CTS parts operate from -55°C to 85°C. Selection must ensure the substitute part's temperature range encompasses the application's operating environment.

Q: Why is part 2-5435668-5 listed as a substitute if it is not recommended?

A: Part 2-5435668-5 was included in the original substitute list but does not meet the critical parameters for functional equivalence. It differs in position count (6 vs. 8), current rating (60mA vs. 25mA), voltage rating (5VDC vs. 24VDC), and actuator type (rocker vs. piano). It is retained in this reference for completeness but should not be selected for 435802-1 replacement applications.

Q: What does MSL rating mean and why does it matter?

A: MSL (Moisture Sensitivity Level) indicates the component's sensitivity to moisture absorption during storage and handling. The original part 435802-1 has MSL listed as Not Applicable. Substitute parts with MSL 1 (Unlimited) can be stored indefinitely without moisture control measures, providing greater flexibility in inventory management and supply chain handling.

Q: Are all substitute parts RoHS3 compliant?

A: No. The original part 435802-1 is RoHS non-compliant. All listed substitute parts (5435802-1, KAP1108E, JS0308PP4-S, KAS1108E, KAS1108ET, 206-8LPST, 208-8LPST, and 2-5435668-5) are RoHS3 compliant. For applications requiring RoHS compliance, any of these substitutes are acceptable from a regulatory standpoint, provided they meet the electrical and mechanical requirements.

Q: What is the pitch specification and why is it important?

A: Pitch refers to the center-to-center distance between adjacent switch positions, specified as 0.100" (2.54mm) for all listed parts. This standardized pitch ensures compatibility with standard DIP switch footprints on printed circuit boards. All substitute parts maintain this pitch, ensuring PCB layout compatibility.

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