ADF08T Equivalent & Substitute Parts

Part Overview

The ADF08T is an 8-position DIP slide switch manufactured by TE Connectivity ALCOSWITCH Switches. This component is a single-pole, single-throw (SPST) switch rated for 25mA at 24VDC with through-hole mounting and PC pin termination. The ADF08T is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity.

Substiute Parts

ADF08T

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1019ADF08T Datasheet

Current PartRFQ

1-1825002-4

TE Connectivity ALCOSWITCH SwitchesIn Stock: 11691-1825002-4 Datasheet

DirectRFQ

209-8LPST

CTS ElectrocomponentsIn Stock: 4705209-8LPST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADF08T is determined by the following critical parameters: circuit configuration (SPST), number of positions (8), actuator type (slide standard), mounting type (through hole), pitch (0.100"), and termination style (PC pin). These parameters define the physical and electrical interface compatibility.

The substitute parts are grouped into two categories:

Direct Equivalent (1-1825002-4): This part maintains identical electrical ratings (25mA, 24VDC) and all mechanical interface parameters. The primary distinction is product status and compliance certification.

Functional Substitute (209-8LPST): This part shares the same circuit configuration, position count, actuator type, mounting method, pitch, and termination style. However, it operates at different electrical ratings (100mA, 20VDC) and has variations in physical dimensions, contact material, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): The 1-1825002-4 is the primary substitute for the obsolete ADF08T. This part is manufactured by the same supplier (TE Connectivity ALCOSWITCH), belongs to the same ADF series, and maintains identical electrical ratings (25mA, 24VDC) and mechanical interface specifications. The 1-1825002-4 carries Active product status and is ROHS3 compliant, providing improved regulatory compliance compared to the obsolete ADF08T. This part requires no circuit redesign and provides direct form-fit-function compatibility.

For Applications with Higher Current Requirements: The 209-8LPST from CTS Electrocomponents is suitable for applications where the circuit can accommodate a higher current rating (100mA versus 25mA). This part maintains the same physical interface (through-hole, 0.100" pitch, PC pin termination) and circuit configuration (SPST, 8 positions). However, the 209-8LPST operates at 20VDC maximum voltage, which is lower than the ADF08T's 24VDC rating. The 209-8LPST also features an extended operating temperature range (-40°C to 85°C) and higher electrical life rating (2,000 cycles). Selection of the 209-8LPST requires verification that the application voltage does not exceed 20VDC and that the different contact material (beryllium copper versus copper alloy) is acceptable for the intended application.

Compliance Considerations: Both substitute parts are ROHS3 compliant, addressing the non-compliance status of the obsolete ADF08T. Applications subject to RoHS regulations should prioritize the 1-1825002-4 or 209-8LPST accordingly.

Frequently Asked Questions (FAQ)

Q: Can the 1-1825002-4 be used as a direct replacement for the ADF08T without circuit modification?

A: Yes. The 1-1825002-4 maintains identical electrical ratings (25mA, 24VDC), the same circuit configuration (SPST), identical mechanical dimensions, and the same interface specifications (through-hole, 0.100" pitch, PC pin termination). No circuit redesign is required.

Q: What are the key differences between the ADF08T and the 209-8LPST?

A: The primary differences are: (1) current rating—209-8LPST is rated for 100mA versus 25mA for the ADF08T; (2) voltage rating—209-8LPST is rated for 20VDC maximum versus 24VDC for the ADF08T; (3) contact material—209-8LPST uses beryllium copper versus copper alloy for the ADF08T; (4) physical dimensions—209-8LPST is 0.858" long and 0.180" high versus 0.878" and 0.189" for the ADF08T; (5) electrical life—209-8LPST is rated for 2,000 cycles versus 1,000 cycles for the ADF08T.

Q: Can the 209-8LPST be used in a circuit designed for 24VDC operation?

A: No. The 209-8LPST is rated for a maximum of 20VDC. Using this part in a 24VDC circuit exceeds its voltage rating and is not permitted.

Q: Are there packaging differences between these parts?

A: Yes. The ADF08T is supplied in bulk packaging (unspecified). The 1-1825002-4 is supplied in bulk packaging. The 209-8LPST is supplied in tube packaging. Packaging differences may affect procurement, handling, and assembly processes.

Q: Which substitute part should be selected for new designs?

A: For applications matching the ADF08T electrical specifications (25mA, 24VDC), the 1-1825002-4 is the recommended choice. This part is from the same manufacturer, maintains identical ratings, and carries Active product status with ROHS3 compliance. The 209-8LPST should be selected only when the application requires higher current capacity (100mA) and can operate at reduced voltage (20VDC maximum).

Q: What is the significance of the ADF08T being classified as obsolete?

A: Obsolete status indicates that the ADF08T is no longer manufactured and is no longer supported by the original manufacturer. Existing inventory may be limited. The 1-1825002-4 (Active status) is the recommended long-term solution for production continuity and future availability.

Q: Are all three parts washable?

A: Yes. The ADF08T, 1-1825002-4, and 209-8LPST are all washable components, supporting post-assembly cleaning processes.