ADF03ST Equivalent & Substitute Parts

Part Overview

The ADF03ST is a surface mount DIP switch manufactured by TE Connectivity ALCOSWITCH Switches. This component is a single-pole, single-throw (SPST) switch with 3 positions, rated for 25mA at 24VDC, featuring a slide actuator with flush, recessed level and gold-plated copper alloy contacts. The ADF03ST is classified as obsolete, necessitating identification of equivalent substitute components for ongoing design requirements and procurement needs.

Substiute Parts

ADF03ST

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1125ADF03ST Datasheet

Current PartRFQ

1-1825059-1

TE Connectivity ALCOSWITCH SwitchesIn Stock: 146201-1825059-1 Datasheet

DirectRFQ

219-3LPST

CTS ElectrocomponentsIn Stock: 22726219-3LPST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ADF03ST are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility: Circuit configuration (SPST), number of positions (3), and voltage/current ratings must support the original application requirements.

Mechanical Compatibility: Surface mount mounting type, gull wing termination, 0.100" pitch, flush/recessed actuator level, and slide actuator type ensure physical and functional interchangeability on existing PCB layouts.

Environmental Compatibility: Operating temperature range, washability, and contact material specifications must align with application conditions.

The identified substitute parts maintain these core parameters while offering alternatives in terms of manufacturer, product status, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

1-1825059-1 (TE Connectivity ALCOSWITCH Switches): This part is manufactured by the same supplier as the ADF03ST and shares the same series designation (ADF). The part maintains SPST configuration with 3 positions, surface mount mounting, and flush/recessed actuator level. The 1-1825059-1 is classified as Active product status, ensuring ongoing availability. Specific electrical ratings (current and voltage) are not provided in the available data; verification against application requirements is necessary. This substitute offers the advantage of continued manufacturer support and supply chain continuity within the TE Connectivity product line.

219-3LPST (CTS Electrocomponents): This part provides an alternative from a different manufacturer while maintaining core mechanical and electrical compatibility. The 219-3LPST is rated for 100mA at 20VDC, which exceeds the original 25mA at 24VDC specification in current capacity but operates at a lower voltage rating. The part features an extended operating temperature range (-55°C ~ 85°C versus -30°C ~ 85°C), improved electrical life (2,000 cycles versus 1,000 cycles), and achieves ROHS3 compliance. The height above board is 0.160" (4.06mm), which is 0.017" lower than the ADF03ST. This substitute is suitable for applications where the lower voltage rating and reduced height are acceptable, and where RoHS compliance is required.

Frequently Asked Questions (FAQ)

Q: Can the 1-1825059-1 directly replace the ADF03ST in all applications? A: The 1-1825059-1 maintains identical mechanical form factor, mounting type, pitch, and actuator configuration. However, specific electrical ratings for the 1-1825059-1 are not provided in the available documentation. Confirmation of current and voltage ratings against application requirements is necessary before implementation.

Q: Is the 219-3LPST suitable for 24VDC applications? A: The 219-3LPST is rated for 20VDC maximum. Applications requiring 24VDC operation exceed this voltage specification. This substitute is suitable only for applications operating at 20VDC or lower.

Q: What is the impact of the height difference between ADF03ST and 219-3LPST? A: The 219-3LPST has a height above board of 0.160" (4.06mm) compared to the ADF03ST at 0.177" (4.50mm). This 0.017" reduction may affect PCB layout clearances and component spacing. Verification against mechanical design constraints is required.

Q: Does the 219-3LPST meet RoHS requirements? A: Yes, the 219-3LPST is ROHS3 compliant. The ADF03ST is RoHS non-compliant. If RoHS compliance is a design requirement, the 219-3LPST is the appropriate selection among the available substitutes.

Q: Are all substitute parts washable? A: Yes, both the 1-1825059-1 and 219-3LPST are washable, matching the washability specification of the ADF03ST.

Q: What is the difference in electrical life between these parts? A: The ADF03ST and 1-1825059-1 are specified for 1,000 electrical cycles. The 219-3LPST is rated for 2,000 electrical cycles, providing extended operational life in switching applications.

Q: Can I use the 219-3LPST in place of the ADF03ST for a 25mA application? A: The 219-3LPST is rated for 100mA, which exceeds the 25mA requirement. Current capacity is not a limiting factor. However, the voltage rating (20VDC maximum) must be verified against the application's voltage requirements before substitution.