DS08T DIP Switch SPST 8-Position Equivalent & Substitute Parts

Part Overview

The DS08T is an 8-position DIP switch manufactured by APEM Inc., designed for through-hole PCB mounting with SPST (Single Pole Single Throw) circuit configuration. This component operates at 24VDC with a 50mA current rating and features a standard slide actuator with raised level positioning. The DS08T is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Alternative components must maintain electrical compatibility (24VDC, 50mA SPST configuration) and mechanical compatibility (through-hole mounting, 0.100" pitch, standard slide actuator).

Key Parameters

Parameter	DS08T Value
Circuit Configuration	SPST
Number of Positions	8
Voltage Rating	24VDC
Current Rating	50mA
Actuator Type	Slide (Standard)
Mounting Type	Through Hole
Pitch	0.100" (2.54mm)
Termination Style	PC Pin
Contact Finish	Gold
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DS08T is determined by strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

Circuit configuration must be SPST
Number of positions must be 8
Voltage rating must be 24VDC
Current rating must be equal to or greater than 50mA
Actuator type must be slide (standard) with raised level
Mounting type must be through hole
Pitch must be 0.100" (2.54mm)
Termination style must be PC Pin
Contact finish must be gold

Identified Substitutes:

The 206-8ST (CTS Electrocomponents) meets all primary substitution criteria with matching electrical specifications (SPST, 8-position, 24VDC, 50mA) and mechanical compatibility (through-hole, 0.100" pitch, standard slide actuator, PC pin termination, gold finish). This part is currently active in production.

The KAS1108E (E-Switch) matches the circuit configuration, position count, voltage rating, mounting type, pitch, and termination style. However, the current rating is 25mA, which is below the DS08T specification of 50mA. This part is suitable only for applications where the actual circuit current requirement does not exceed 25mA.

Parameter Comparison

Parameter	DS08T (APEM Inc.)	206-8ST (CTS Electrocomponents)	KAS1108E (E-Switch)
Circuit Configuration	SPST	SPST	SPST
Number of Positions	8	8	8
Voltage Rating	24VDC	24VDC	24VDC
Current Rating	50mA	50mA	25mA
Actuator Type	Slide (Standard)	Slide (Standard)	Slide (Standard)
Actuator Level	Raised	Raised	Raised
Mounting Type	Through Hole	Through Hole	Through Hole
Pitch	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Termination Style	PC Pin	PC Pin	PC Pin
Contact Finish	Gold	Gold	Gold
Height Above Board	0.271" (6.88mm)	0.334" (8.48mm)	0.275" (6.99mm)
Length	0.859" (21.82mm)	0.886" (22.50mm)	0.854" (21.70mm)
Operating Temperature Range	-20°C ~ 70°C	-55°C ~ 85°C	-40°C ~ 85°C
Electrical Life	2,000 Cycles	10,000 Cycles	2,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

206-8ST (CTS Electrocomponents): This part is the primary substitute for the DS08T. It maintains full electrical and mechanical compatibility with identical current and voltage ratings. The 206-8ST is currently in active production status, ensuring long-term availability. It exceeds the DS08T in electrical life (10,000 cycles versus 2,000 cycles) and operating temperature range (-55°C to 85°C versus -20°C to 70°C). Minor dimensional variations exist in height above board (0.334" versus 0.271") and length (0.886" versus 0.859"), which must be evaluated against specific PCB layout constraints. Both parts are ROHS3 compliant.

KAS1108E (E-Switch): This part is suitable as a substitute only when the application circuit current requirement does not exceed 25mA. The KAS1108E is active in production and offers comparable mechanical compatibility and dimensional characteristics to the DS08T. Operating temperature range (-40°C to 85°C) and electrical life (2,000 cycles) match or exceed the DS08T specifications. ROHS3 compliance is maintained. Selection of this part requires confirmation that the 25mA current rating is sufficient for the intended application.

Frequently Asked Questions (FAQ)

Q: Can the 206-8ST directly replace the DS08T without PCB modifications?

A: The 206-8ST maintains electrical compatibility and standard through-hole mounting with 0.100" pitch. However, dimensional differences exist: the 206-8ST is 0.063" taller (0.334" versus 0.271") and 0.027" longer (0.886" versus 0.859"). PCB layout review is necessary to confirm clearance around the switch location. If the original PCB design accommodates these dimensions, no modifications are required.

Q: Is the KAS1108E suitable for all DS08T applications?

A: The KAS1108E is suitable only for applications where the circuit current does not exceed 25mA. The DS08T is rated for 50mA; the KAS1108E is rated for 25mA. Circuit analysis must confirm that the actual operating current is within the KAS1108E specification before substitution.

Q: What are the key differences between the substitute parts?

A: The 206-8ST matches the DS08T current rating (50mA) and offers superior electrical life (10,000 cycles). The KAS1108E has a reduced current rating (25mA) but maintains the same electrical life as the DS08T (2,000 cycles). Both substitutes offer extended operating temperature ranges compared to the DS08T.

Q: Are all three parts RoHS compliant?

A: Yes. The DS08T, 206-8ST, and KAS1108E are all ROHS3 compliant, meeting environmental and regulatory requirements for lead-free manufacturing.

Q: What packaging is available for the substitute parts?

A: The 206-8ST and KAS1108E are supplied in tube packaging, which differs from the DS08T packaging specification. Confirm that tube packaging is compatible with assembly and handling processes.

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