ADPA04 DIP Switch SPST 4-Position Piano Actuator Equivalent & Substitute Parts

Part Overview

The ADPA04 is a 4-position DIP switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a Single Pole Single Throw (SPST) switch with piano actuator mechanism. This component is rated for 25mA at 24VDC and is designed for through-hole, right-angle PCB mounting with gold-plated copper alloy contacts.

The ADPA04 carries an Obsolete product status. Locating equivalent and substitute parts is necessary to support legacy system maintenance, board repairs, and production continuity for applications currently utilizing this component. Active alternatives with compatible electrical and mechanical specifications are available to ensure uninterrupted functionality.

Substiute Parts

ADPA04

TE Connectivity ALCOSWITCH SwitchesIn Stock: 748ADPA04 Datasheet

Current PartRFQ

4-1571999-4

TE Connectivity ALCOSWITCH SwitchesIn Stock: 9234-1571999-4 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADPA04 is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Circuit Configuration: SPST
• Number of Positions: 4
• Actuator Type: Piano with Raised level
• Mounting Type: Through Hole
• Pitch: 0.100" (2.54mm)
• Termination Style: PC Pin

Electrical Compatibility Parameters:

• Current Rating: Must be ≥25mA
• Voltage Rating: Must be ≥24VDC

Physical Compatibility Parameters:

• Contact Material: Copper Alloy
• Contact Finish: Gold plated
• Washable: Yes

The substitute part 4-1571999-4 satisfies all mandatory matching parameters and electrical compatibility requirements. This part maintains identical circuit topology, position count, actuator mechanism, and mounting configuration. The substitute is classified as Active product status, ensuring ongoing availability and support compared to the Obsolete ADPA04.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 4-1571999-4

The part 4-1571999-4 is the qualified substitute for ADPA04 applications. Selection of this substitute is based on the following engineering criteria:

Product Status Advantage: The substitute carries Active product status, ensuring manufacturer support, continued availability, and supply chain reliability. The ADPA04 Obsolete status creates long-term sourcing risk for new production and field repairs.

Compliance Enhancement: The substitute meets ROHS3 compliance standards, aligning with current environmental regulations and industry requirements. The original ADPA04 is RoHS non-compliant, which may present regulatory constraints in certain markets and applications.

Electrical & Mechanical Equivalence: Both parts are manufactured by TE Connectivity ALCOSWITCH Switches within the ADPA series. The substitute maintains identical circuit configuration (SPST), position count (4), actuator type (Piano, Raised), and mounting methodology (Through Hole). These parameters ensure direct functional equivalence in existing PCB designs.

Certification Alignment: Both parts share identical ECCN (EAR99) and HTSUS (8536.50.9065) classifications, supporting consistent export and import compliance. Both maintain MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.

Packaging Consideration: The substitute is supplied in Tube packaging, which is standard for component distribution and handling. Verify packaging requirements against your procurement and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 4-1571999-4 be used as a direct replacement for ADPA04 in existing PCB designs?

A: Yes. Both parts share identical circuit configuration (SPST), position count (4), actuator type (Piano, Raised), and through-hole mounting methodology. The ADPA series standardization ensures mechanical and electrical compatibility. No PCB redesign is required.

Q: What is the primary reason to transition from ADPA04 to 4-1571999-4?

A: The ADPA04 is classified as Obsolete, creating supply chain risk and limiting manufacturer support. The substitute 4-1571999-4 is Active product status, ensuring ongoing availability, technical support, and compliance with current environmental standards (ROHS3).

Q: Are there electrical performance differences between these parts?

A: No electrical performance differences exist. Both parts are rated for 25mA at 24VDC and utilize identical SPST switching logic. Both feature gold-plated copper alloy contacts and support washable applications.

Q: Does the substitute meet current environmental regulations?

A: Yes. The substitute 4-1571999-4 is ROHS3 compliant, meeting current environmental directives. The original ADPA04 is RoHS non-compliant and may not satisfy regulatory requirements in certain markets.

Q: What is the pitch specification for the substitute part?

A: The substitute is part of the ADPA series, which standardizes on 0.100" (2.54mm) pitch. This matches the ADPA04 specification and ensures PCB footprint compatibility.

Q: Are moisture sensitivity or storage requirements different between these parts?

A: No. Both parts carry MSL 1 (Unlimited) rating, indicating no special moisture control or storage requirements during handling and assembly.

Q: What packaging format is the substitute supplied in?

A: The substitute 4-1571999-4 is supplied in Tube packaging. Confirm this packaging format is compatible with your receiving, storage, and assembly processes.

Q: Are export or import classifications affected by using the substitute?

A: No. Both parts share identical ECCN (EAR99) and HTSUS (8536.50.9065) classifications, ensuring consistent compliance with export control and tariff regulations.