MS12LNW03F Equivalent & Substitute Parts

Part Overview

The MS12LNW03F is a slide switch manufactured by NKK Switches, classified as SPDT (Single Pole Double Throw) with a 6A AC rating at 125V. This component features an illuminated actuator, through-hole mounting, and non-shorting contact timing (BBM). The product is currently obsolete, making identification of equivalent and substitute parts essential for ongoing maintenance, repair, and design continuity in applications requiring SPDT slide switch functionality.

Substiute Parts

MS12LNW03F

NKK SwitchesIn Stock: 1188MS12LNW03F Datasheet

Current PartRFQ

MSN12LNW03F

NKK SwitchesIn Stock: 797MSN12LNW03F Datasheet

MFR RecommendedRFQ

MSSA101DG

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1117MSSA101DG Datasheet

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MSSA104D

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1039MSSA104D Datasheet

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MSSA111DG

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1012MSSA111DG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MS12LNW03F is determined by the following critical parameters:

Primary Substitution Criteria:

• Circuit configuration (SPDT)
• Contact timing (Non-Shorting BBM)
• Switch function (On-On)
• Mounting type (Through Hole)
• Termination style (PC Pin)

Electrical Performance Criteria:

• Current rating capability (minimum 6A AC)
• Voltage rating (minimum 125V AC)

Mechanical Compatibility Criteria:

• Through-hole PC pin termination
• Epoxy sealed terminals

The substitute parts are grouped based on their ability to meet or exceed these parameters while maintaining functional equivalence in SPDT slide switch applications.

Parameter Comparison

Engineering Selection Recommendations

MSN12LNW03F (NKK Switches): This is the direct manufacturer equivalent from NKK Switches. As an active product from the same manufacturer, it provides the closest functional match to the obsolete MS12LNW03F. Detailed electrical specifications are not provided in available documentation, but the part number structure indicates it is the current production equivalent. This option is recommended for applications requiring minimal design changes.

MSSA104D (TE Connectivity ALCOSWITCH): This part meets the core functional requirements of SPDT configuration, non-shorting contact timing, and on-on switch function with through-hole PC pin termination. However, the current rating is 3A AC at 115V, which is below the original 6A AC at 125V specification. This part is suitable only for applications where the electrical load does not exceed 3A AC at 115V. The part is ROHS3 compliant, providing regulatory advantage over the non-compliant original.

MSSA101DG and MSSA111DG (TE Connectivity ALCOSWITCH): Both parts maintain SPDT configuration and non-shorting contact timing but are rated for only 0.4VA at 20V. These parts are not suitable for direct substitution in applications requiring the original 6A AC at 125V performance. These options are applicable only in low-voltage, low-current applications.

Frequently Asked Questions (FAQ)

Q: Can MSN12LNW03F be used as a direct replacement for MS12LNW03F?

A: MSN12LNW03F is the active equivalent from NKK Switches and is the recommended direct replacement. Both parts share the same base product number (MS12LNW03) and maintain identical circuit configuration (SPDT), contact timing (non-shorting BBM), and mounting characteristics (through-hole PC pin).

Q: Is MSSA104D a suitable substitute for the MS12LNW03F?

A: MSSA104D maintains functional equivalence in circuit configuration (SPDT), contact timing (non-shorting BBM), and mounting type (through-hole PC pin). However, the electrical ratings differ: MSSA104D is rated 3A AC at 115V compared to the original 6A AC at 125V. Substitution is valid only if the application load does not exceed 3A AC at 115V.

Q: Why are MSSA101DG and MSSA111DG not recommended as direct substitutes?

A: While these parts maintain SPDT configuration and non-shorting contact timing, their electrical ratings (0.4VA at 20V) are significantly below the original specification (6A AC at 125V). These parts are suitable only for low-voltage, low-current applications and cannot handle the electrical load of the original design.

Q: What is the difference between the substitute parts from TE Connectivity?

A: MSSA104D is rated for 3A AC at 115V with silver contact finish. MSSA101DG and MSSA111DG are both rated for 0.4VA at 20V with gold contact finish. The primary distinction is electrical performance capability, with MSSA104D providing the highest current and voltage ratings among the TE Connectivity options.

Q: Are there packaging differences between the main part and substitutes?

A: The main part MS12LNW03F is specified with standard packaging. MSN12LNW03F is available in bulk packaging. MSSA104D is available in bulk packaging. MSSA101DG and MSSA111DG are specified with standard packaging. Packaging format should be confirmed with the supplier based on procurement requirements.

Q: What compliance considerations apply to substitution?

A: The original MS12LNW03F is RoHS non-compliant. MSN12LNW03F compliance status is not specified. MSSA104D is ROHS3 compliant, providing regulatory advantage for new designs or applications with RoHS requirements. MSSA101DG and MSSA111DG have not applicable RoHS status. Compliance requirements should be evaluated based on the application's regulatory environment.