MSSA4350 Equivalent & Substitute Parts

Part Overview

The MSSA4350 is a slide switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a 4P3T (four-pole, three-throw) through-hole component rated for 300mA AC at 125V. This switch features shorting contact timing (MBB), epoxy sealed terminals, and is designed for applications requiring multiple independent switching circuits with three discrete positions.

The MSSA4350 carries an obsolete product status. Identification of equivalent and substitute parts is necessary to support ongoing maintenance, repair, and production requirements for systems utilizing this component.

Substiute Parts

MSSA4350

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1215MSSA4350 Datasheet

Current PartRFQ

1825204-3

TE Connectivity ALCOSWITCH SwitchesIn Stock: 10531825204-3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MSSA4350 is evaluated based on electrical and mechanical compatibility within the MSSA series from TE Connectivity ALCOSWITCH Switches. The primary substitution candidate is identified based on the following criteria:

Electrical Compatibility Parameters:

• Current rating (300mA AC minimum)
• Voltage rating (125V AC minimum)
• Contact timing type (Shorting/MBB)

Mechanical Compatibility Parameters:

• Mounting type (Through Hole)
• Termination style (PC Pin)
• Actuator length (10.41mm)
• Switch travel (2.00mm)
• Operating temperature range (-20°C to 85°C)

Functional Compatibility:

• Series alignment (MSSA)
• Contact material and finish (Copper Alloy with Silver finish)
• Epoxy sealed terminal construction

The substitute part 1825204-3 maintains electrical and mechanical compatibility with the MSSA4350 across all critical parameters. The primary functional difference is the circuit configuration change from 4P3T to 4P4T, which represents an expansion of switching positions rather than a reduction in capability.

Parameter Comparison

Engineering Selection Recommendations

The MSSA4350 is classified as obsolete, making the identification of active alternatives essential for continued system support. The substitute part 1825204-3 is an active product within the same MSSA series from TE Connectivity ALCOSWITCH Switches.

Electrical and Mechanical Compatibility: The 1825204-3 maintains full electrical compatibility with the MSSA4350, supporting identical current (300mA AC) and voltage (125V AC) ratings. Mechanical compatibility is preserved through identical mounting type (through hole), termination style (PC pin), actuator length (10.41mm), and switch travel (2.00mm). Both components operate across the same temperature range (-20°C to 85°C) and feature identical contact materials and finishes.

Compliance and Certification: Both the MSSA4350 and 1825204-3 are ROHS3 compliant and carry identical ECCN (EAR99) and HTSUS (8536.50.9050) classifications, ensuring regulatory alignment for procurement and deployment.

Functional Differences: The primary distinction between these components is the circuit configuration. The MSSA4350 provides 4P3T functionality (three switch positions), while the 1825204-3 provides 4P4T functionality (four switch positions). This represents an expansion of available switching positions. Additionally, the 1825204-3 features a polyamide (PA66) actuator material compared to the polyester actuator in the MSSA4350, and exhibits a higher operating force (600gf versus 470gf).

Selection Basis: Selection of the 1825204-3 as a substitute is appropriate when the application circuit design can accommodate the additional switch position provided by the 4P4T configuration. The active product status of the 1825204-3 ensures ongoing availability and supply chain continuity compared to the obsolete MSSA4350.

Frequently Asked Questions (FAQ)

Q: Can the 1825204-3 directly replace the MSSA4350 in all applications?

A: The 1825204-3 provides electrical and mechanical compatibility with the MSSA4350 across all critical parameters including current rating, voltage rating, mounting type, and termination style. However, the circuit configuration differs: the MSSA4350 is 4P3T while the 1825204-3 is 4P4T. Direct replacement is possible only if the application circuit design can accommodate the additional switch position or if the extra position remains unused.

Q: What is the significance of the circuit configuration difference (4P3T versus 4P4T)?

A: The first number (4) indicates four independent poles or circuits. The second number indicates the number of throw positions. The MSSA4350 provides three discrete switch positions per pole, while the 1825204-3 provides four discrete switch positions per pole. Applications requiring only three positions can operate the 1825204-3 with the fourth position unused.

Q: Are there differences in actuator material between these components?

A: Yes. The MSSA4350 features a polyester actuator, while the 1825204-3 uses polyamide (PA66) nylon 6/6. Both materials are suitable for the specified operating temperature range (-20°C to 85°C). The polyamide material in the 1825204-3 provides enhanced mechanical durability.

Q: What is the difference in operating force between these switches?

A: The MSSA4350 requires 470gf (gram-force) of operating force, while the 1825204-3 requires 600gf. This difference reflects the enhanced mechanical design of the active 1825204-3 component. Applications must accommodate this increased actuation force requirement.

Q: Why is the MSSA4350 listed as obsolete?

A: The MSSA4350 carries an obsolete product status, indicating that TE Connectivity ALCOSWITCH Switches has discontinued active production and support for this component. The 1825204-3 represents the active alternative within the MSSA series.

Q: Are both components RoHS compliant?

A: Yes. Both the MSSA4350 and 1825204-3 are ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing and deployment.

Q: What is the packaging difference between these components?

A: The MSSA4350 is supplied in standard packaging, while the 1825204-3 is supplied in bulk packaging. Bulk packaging typically accommodates higher-volume procurement requirements.

Q: Are the electrical and mechanical life ratings identical?

A: Yes. Both components are rated for 15,000 mechanical cycles and 15,000 electrical cycles, providing equivalent operational longevity under specified conditions.