TE Connectivity ALCOSWITCH 1825002-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity ALCOSWITCH 1825002-4 is a DIP slide switch with SPST (Single Pole Single Throw) configuration, rated for 25mA at 24VDC. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The switch features a 3-position through-hole slide actuator with gold-plated copper alloy contacts and operates across a temperature range of -30°C to 85°C. Identification of compatible alternatives ensures design continuity and supply chain reliability for applications requiring equivalent electrical and mechanical performance.

Substiute Parts

1825002-4

TE Connectivity ALCOSWITCH SwitchesIn Stock: 12091825002-4 Datasheet

Current PartRFQ

SDA03H0B

C&KIn Stock: 996SDA03H0B Datasheet

SimilarRFQ

SDA03H0BD

C&KIn Stock: 3662SDA03H0BD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 1825002-4 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence: Circuit configuration (SPST), number of positions (3), current rating (25mA), and voltage rating (24VDC) must be identical.

Mechanical Equivalence: Actuator type (slide standard), actuator level (flush/recessed), mounting type (through hole), termination style (PC pin), and pitch (0.100" / 2.54mm) must match.

Physical Compatibility: Body material (PPS), contact finish (gold), and dimensional constraints including height above board and length must be compatible with the original footprint.

Performance Equivalence: Mechanical life (1,000 cycles) and electrical life (1,000 cycles) ratings must be maintained.

The C&K SDA03H0B and SDA03H0BD parts satisfy all substitution criteria. Both are manufactured by C&K, feature active product status, and maintain full electrical and mechanical compatibility with the obsolete TE Connectivity original.

Parameter Comparison

Engineering Selection Recommendations

Both C&K substitute parts (SDA03H0B and SDA03H0BD) are qualified replacements for the obsolete TE Connectivity 1825002-4 based on product status and regulatory compliance.

C&K SDA03H0B is recommended for applications requiring washable switch characteristics. This part maintains active product status, carries ROHS3 compliance certification, and provides extended operating temperature range (-40°C to 85°C) compared to the original specification. The beryllium copper contact material provides enhanced durability over the original copper alloy contacts.

C&K SDA03H0BD is recommended for applications where washable characteristics are not required. This part also maintains active product status and ROHS3 compliance. The extended operating temperature range and beryllium copper contacts provide equivalent performance benefits to the SDA03H0B variant.

Both substitutes are electrically and mechanically equivalent to the original part. The minor height difference (0.183" versus 0.189") is within standard PCB assembly tolerances and does not affect functional compatibility. Selection between the two C&K variants depends solely on washability requirements for the specific application.

Frequently Asked Questions (FAQ)

Q: Can the C&K SDA03H0B and SDA03H0BD be used interchangeably with the TE Connectivity 1825002-4?

A: Both C&K parts are direct electrical and mechanical equivalents. They share identical circuit configuration (SPST), position count (3), current rating (25mA), voltage rating (24VDC), actuator type, mounting method, and pitch. The primary difference is washability: SDA03H0B is washable; SDA03H0BD is not. Selection depends on application requirements.

Q: What is the difference between SDA03H0B and SDA03H0BD?

A: Both parts are electrically and mechanically identical. The distinction is the washable feature: SDA03H0B includes tape seal and washable characteristics, while SDA03H0BD does not. All other specifications, including operating temperature range (-40°C to 85°C), contact material (beryllium copper), and RoHS3 compliance, are identical.

Q: Is the height difference between the original and substitute parts significant?

A: The original TE Connectivity 1825002-4 has a height of 0.189" (4.80mm), while both C&K substitutes measure 0.183" (4.65mm). This 0.006" (0.15mm) difference is within standard PCB assembly tolerances and does not affect footprint compatibility or functional performance.

Q: Do the substitute parts meet the same regulatory requirements?

A: Both C&K substitutes carry ROHS3 compliance certification and REACH Unaffected status, matching the regulatory profile of the original part. Both are classified under the same HTSUS code (8536.50.9065) and ECCN (EAR99).

Q: What is the operating temperature range for the substitute parts?

A: Both C&K substitutes operate across -40°C to 85°C, which exceeds the original specification of -30°C to 85°C. This extended lower temperature limit provides additional design margin for applications operating in cold environments.

Q: Are the contact materials equivalent?

A: The original part uses copper alloy contacts, while both C&K substitutes use beryllium copper contacts. Beryllium copper provides superior electrical conductivity and contact reliability, making it a performance upgrade over the original copper alloy specification.

Q: What is the mechanical and electrical life rating for the substitute parts?

A: Both C&K substitutes maintain the same mechanical and electrical life ratings as the original: 1,000 cycles for both parameters.