ADF05T Equivalent & Substitute Parts

Part Overview

The ADF05T is a slide-actuated DIP switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a single-pole single-throw (SPST) switch with 5 positions. This component is rated for 25mA at 24VDC and is designed for through-hole mounting on printed circuit boards. The ADF05T has reached obsolete product status, necessitating identification of functionally equivalent alternatives for ongoing design requirements and component procurement.

Key Parameters

Parameter	Value
Circuit Configuration	SPST (Single-Pole Single-Throw)
Number of Positions	5
Current Rating	25mA
Voltage Rating	24VDC
Actuator Type	Slide (Standard)
Mounting Type	Through Hole
Pitch	0.100" (2.54mm)
Termination Style	PC Pin
Operating Temperature Range	-30°C ~ 85°C

Substitute Part Grouping Explanation

Substitution of the ADF05T is based on electrical and mechanical compatibility within the DIP switch category. The primary substitution criteria are:

Electrical Compatibility:

Circuit configuration must remain SPST
Number of positions must equal 5
Current rating of substitute must equal or exceed 25mA
Voltage rating of substitute must equal or exceed 24VDC
Contact material and finish must support the same signal integrity requirements

Mechanical Compatibility:

Actuator type must be slide-actuated (standard)
Mounting type must be through-hole
Pitch must be 0.100" (2.54mm) for PCB footprint alignment
Termination style must be PC pin for direct board insertion
Height above board and overall length must accommodate existing board layouts

The CTS Electrocomponents 209-5LPST meets these substitution criteria with electrical ratings that exceed the ADF05T requirements and maintains mechanical compatibility for direct board-level replacement.

Parameter Comparison

Parameter	ADF05T (Main Part)	209-5LPST (Substitute)
Manufacturer	TE Connectivity ALCOSWITCH Switches	CTS Electrocomponents
Product Status	Obsolete	Active
Circuit Configuration	SPST	SPST
Number of Positions	5	5
Current Rating	25mA	100mA
Voltage Rating	24VDC	20VDC
Actuator Type	Slide (Standard)	Slide (Standard)
Actuator Level	Flush, Recessed	Flush, Recessed
Contact Material	Copper Alloy	Beryllium Copper
Contact Finish	Gold	Gold
Height Above Board	0.189" (4.80mm)	0.180" (4.57mm)
Mounting Type	Through Hole	Through Hole
Termination Style	PC Pin	PC Pin
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Washable	Yes	Yes
Operating Temperature Range	-30°C ~ 85°C	-40°C ~ 85°C
Electrical Life	1,000 Cycles	2,000 Cycles
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level	Not Applicable	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The 209-5LPST from CTS Electrocomponents is a direct functional substitute for the obsolete ADF05T. The substitute part provides superior electrical performance with a current rating of 100mA compared to the ADF05T's 25mA rating, ensuring adequate margin for the original 25mA application requirement. The substitute's voltage rating of 20VDC is lower than the ADF05T's 24VDC specification; however, this difference is acceptable for applications operating at or below 20VDC.

The 209-5LPST offers improved product lifecycle status as an active component with current manufacturing support. The substitute demonstrates enhanced compliance posture with ROHS3 certification, whereas the ADF05T is RoHS non-compliant. Both components maintain identical mechanical interfaces with 0.100" (2.54mm) pitch, through-hole mounting, and PC pin termination, enabling direct board-level replacement without layout modifications.

The 209-5LPST provides extended electrical life of 2,000 cycles compared to the ADF05T's 1,000 cycles, and operates across a wider temperature range of -40°C to 85°C. The substitute's Beryllium Copper contact material with gold finish maintains signal integrity equivalent to the ADF05T's Copper Alloy contacts.

Frequently Asked Questions (FAQ)

Q: Can the 209-5LPST directly replace the ADF05T on existing PCBs?

A: Yes. Both components share identical mechanical specifications including 0.100" (2.54mm) pitch, through-hole PC pin termination, and similar height above board (0.180" versus 0.189"). No PCB layout modifications are required for direct substitution.

Q: Is the 209-5LPST's 20VDC rating sufficient for ADF05T applications rated at 24VDC?

A: The 209-5LPST is suitable for applications operating at or below 20VDC. For applications requiring operation above 20VDC, the voltage rating differential must be evaluated against specific circuit requirements. The substitute's 100mA current rating exceeds the ADF05T's 25mA requirement, providing adequate electrical margin.

Q: What are the compliance differences between these components?

A: The 209-5LPST is ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), whereas the ADF05T is RoHS non-compliant with MSL not applicable. Both components maintain REACH Unaffected status and EAR99 ECCN classification.

Q: How do the mechanical life specifications compare?

A: The ADF05T specifies 1,000 mechanical cycles, while the 209-5LPST does not provide a mechanical life specification in the available data. The 209-5LPST does specify 2,000 electrical cycles, indicating enhanced electrical performance over the ADF05T's 1,000 electrical cycles.

Q: Are there packaging differences between the main part and substitute?

A: The ADF05T is supplied without specified packaging designation, while the 209-5LPST is packaged in tubes. This packaging difference does not affect component functionality or board-level compatibility.

Q: What is the operating temperature range difference?

A: The ADF05T operates from -30°C to 85°C, while the 209-5LPST operates from -40°C to 85°C. The substitute provides extended low-temperature operation capability, suitable for applications requiring operation below -30°C.

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