MSSA4450 Equivalent & Substitute Parts

Part Overview

The MSSA4450 is a slide switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a 4-pole 4-throw (4P4T) 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 in a compact form factor.

The MSSA4450 carries an obsolete product status. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and production requirements for legacy equipment utilizing this component.

Substiute Parts

MSSA4450

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1078MSSA4450 Datasheet

Current PartRFQ

1825204-3

TE Connectivity ALCOSWITCH SwitchesIn Stock: 10531825204-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MSSA4450 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Circuit configuration must be 4P4T
• Current rating must be 300mA AC minimum
• Voltage rating must be 125V AC minimum
• Contact timing must be shorting (MBB)

Mechanical Compatibility Requirements:

• Mounting type must be through hole
• Termination style must be PC Pin
• Actuator length must be 10.41mm
• Switch travel must be 2.00mm

Physical and Material Requirements:

• Contact material must be copper alloy with silver finish
• Operating temperature range must encompass -20°C to 85°C
• Epoxy sealed terminals required

Parts meeting all these criteria are classified as direct substitutes. Variations in operating force, actuator material composition, or product status do not disqualify substitution eligibility when all electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

The part 1825204-3 is a direct functional substitute for the MSSA4450 across all critical electrical and mechanical parameters. Both components share identical circuit configuration, current and voltage ratings, contact timing, mounting specifications, and operating characteristics.

Product Status Consideration: The MSSA4450 is classified as obsolete, while 1825204-3 maintains active product status. Active status indicates ongoing manufacturer support, availability, and compliance with current regulatory standards.

Compliance Consideration: The 1825204-3 is ROHS3 compliant, whereas the MSSA4450 is RoHS non-compliant. For applications subject to RoHS regulations or requiring compliance with modern environmental standards, 1825204-3 is the appropriate selection.

Material and Performance Variations: The actuator material differs between the two parts (polyester versus polyamide/nylon 6/6), and the operating force specification is higher in 1825204-3 (600gf versus 470gf). These variations do not affect electrical or mechanical compatibility in standard through-hole PCB applications. The polyamide actuator material in 1825204-3 provides enhanced durability and environmental resistance compared to polyester.

Selection Guidance: For new designs or applications requiring regulatory compliance, 1825204-3 is the recommended selection. For legacy equipment replacement where the original MSSA4450 is no longer available, 1825204-3 provides direct functional equivalence with improved compliance status and material specifications.

Frequently Asked Questions (FAQ)

Q: Can 1825204-3 be used as a direct replacement for MSSA4450 in existing designs?

A: Yes. The 1825204-3 meets all electrical and mechanical requirements of the MSSA4450, including circuit configuration, current and voltage ratings, contact timing, mounting type, termination style, and physical dimensions. Direct substitution is supported without circuit modification.

Q: What is the significance of the different operating force values (470gf vs. 600gf)?

A: Operating force represents the pressure required to actuate the switch. The higher operating force in 1825204-3 (600gf) indicates a slightly firmer actuation feel. This difference does not affect electrical performance or compatibility. The higher force may provide improved tactile feedback and reduced susceptibility to accidental actuation in some applications.

Q: Why does the actuator material differ between these parts?

A: The MSSA4450 uses polyester, while 1825204-3 uses polyamide (PA66/nylon 6/6). Polyamide offers superior mechanical strength, temperature stability, and environmental resistance. This material upgrade reflects modern manufacturing standards and does not impact functional compatibility.

Q: Is RoHS compliance a factor in selecting between these parts?

A: RoHS compliance is relevant for applications subject to environmental regulations or customer requirements. The 1825204-3 is ROHS3 compliant, making it suitable for regulated markets and modern supply chains. The MSSA4450 is non-compliant. For new applications or regulated industries, 1825204-3 is the appropriate choice.

Q: Are there any packaging differences between MSSA4450 and 1825204-3?

A: Both parts are supplied in bulk packaging. No packaging format differences exist that would affect component handling or installation procedures.

Q: What is the basis for determining substitution eligibility?

A: Substitution eligibility is determined by equivalence across critical electrical parameters (circuit configuration, current rating, voltage rating, contact timing) and mechanical parameters (mounting type, termination style, actuator length, switch travel, contact material and finish). Product status and compliance certifications do not disqualify substitution but inform selection strategy for new applications.

Q: Can MSSA4450 be used in place of 1825204-3?

A: Electrical and mechanical compatibility is bidirectional. However, the MSSA4450 is obsolete and RoHS non-compliant. For new designs or regulated applications, 1825204-3 is the preferred selection. The MSSA4450 is appropriate only for legacy equipment replacement where the original part specification is required.