adrian95 / FSM1LP

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Part Data Review and Verification

flux

2:32

Reviewing datasheet requirements.

Gathering part information.

Analyzing the schematic.

Analyzing the PCB layout.

Looking for "manufacturer part number, product description, switch type, circuit, operating force, contact arrangement" in DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6

Looking for "terminal assignment or complete pin configuration for FSM1LP tactile switch" in DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6

Looking for "mechanical dimensions, recommended pcb layout, package dimensions for FSM1LP" in DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6

Looking for "electrical characteristics contact rating insulation resistance dielectric strength operating temperature life travel bounce for FSM1LP" in DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6

Looking for "tape and reel package style or package type for FSM1LP" in DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6

Running multiple web searches.

Looking for "FSM1LP product family page showing series name, dimensions, and part numbers" in DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6

Looking for "FSM1LPS 1977263-1 or FSM1LPSTR 1977263-2 ordering information and actuation force" in DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6

Found 1 results.

Found 1 results.

Found 1 results.

Running multiple web searches.

Analyzing the PCB layout.

Found 1 results.

Found 1 results.

I reviewed the part project against the currently linked TE documentation using a datasheet-first audit approach, where exact pin count and metadata should match the source document and missing/incorrect properties should be flagged rather than guessed
Datasheet property
  • No update was needed, because a Datasheet URL is already set on the project.
  • Current property points to a TE official document URL.
  • One note: the current URL looks like a catalog-section PDF, while TE’s product page also lists a more specific official product drawing for FSM1LP. I left the property unchanged since your instruction was only to update it if missing.
Part info found
Project metadata currently present
  • Manufacturer Name: TE Connectivity
  • Manufacturer Part Number: FSM1LP
  • Part Type: Electromechanical Components
  • Designator Prefix: S
  • Description: “Tactile Switches SPST OFF-(ON) 160gF”
Assets present
  • Symbol SVG
  • KiCad footprint
  • STEP 3D model
Key specs found from TE docs / product page
  • Type: tactile switch
  • Function: SPST, normally open / momentary
  • Actuation force: 160 g / 1.6 N
  • Rating: 50 mA, 24 VDC
  • Mounting / termination: surface mount / SMD pads
  • Profile: low profile
  • Body size: about 4 x 6 mm
  • Height: about 3.09 mm for the 1.6 N low-profile variant
  • Operating temperature: product page shows -35 to +85 °C; the catalog extract showed -40 to +85 °C
  • ESD grounding terminal: With
  • Operating life: up to 1,000,000 operations
Symbol / pin audit
The schematic currently contains 5 terminals:
  1. COM_1 — Pin 1
  2. COM_2 — Pin 2
  3. NO_1 — Pin 3
  4. NO_2 — Pin 4
  5. GND — Pin 5
What looks correct
  • A 5-pad implementation is plausible for this part, because TE’s official product page explicitly says “ESD grounding terminal: With.”
  • The naming scheme COM / NO / GND is consistent with a normally-open SPST tactile switch plus ESD ground tab.
  • The PCB footprint also has 5 pads, matching the symbol terminal count.
What is incomplete / mismatched
  • All 5 terminals have Pin Type = Unspecified.
  • No Pin Description properties are set on the terminals.
  • There are no richer terminal properties like section/grouping, which is acceptable for a simple switch part, but pin type and description should still be populated when the source supports them
  • I could not extract an explicit terminal table or pin-numbered drawing text from the currently linked TE PDF, so I cannot claim the exact pin-number-to-label mapping is fully verified from the document text alone. Per the review rules, that should be treated as not fully verified, not guessed
Footprint audit What looks correct
  • The project footprint contains 5 pads, which matches the symbol and matches the presence of an ESD grounding terminal.
  • The overall part family info is consistent with a low-profile 4x6 mm SMT tactile switch.
What I could not fully verify
  • I did not get an extracted pad-by-pad land pattern table from the linked TE PDF text.
  • So I can say the footprint is structurally consistent at a high level, but I cannot fully verify pad geometry, spacing, or exact courtyard/land pattern dimensions from the extracted source text currently available.
Properties audit summary Good
  • Manufacturer is correct.
  • Datasheet URL exists.
  • Designator prefix S is appropriate.
  • Description is broadly accurate.
Missing / weak metadata
  • Package / case code is not set.
  • Exact orderable MPN format is a little ambiguous:
    • project uses FSM1LP
    • TE product page also uses TE internal/orderable identifiers like 1-1437565-6
  • For library quality, it would be better to store either:
    • the exact TE orderable number, or
    • clearly label FSM1LP as the family / marketing number and add the exact orderable PN separately if desired.
Possible spec discrepancy
  • Operating temperature has a small inconsistency between sources:
    • one TE extract showed -40 to +85 °C
    • the official product page summary showed -35 to +85 °C
  • That should be treated as a needs-confirmation item from the actual product drawing / datasheet PDF before adding an Operating Temperature property.
Bottom line No major structural mismatch found
  • Symbol terminal count: plausible
  • Footprint pad count: plausible
  • 5th GND/ESD pad: plausible and likely correct
Main issues to fix
  1. Terminal pin types are all unspecified
  2. Pin descriptions are missing
  3. Package/case metadata is missing
  4. Exact canonical MPN / exact temperature rating should be confirmed from the product drawing
If you want, I can do the next cleanup pass and:
  • set the terminal Pin Type and Pin Description properties,
  • add a Package or Case Code property,
  • and normalize the metadata to the exact TE orderable part once you choose which FSM1LP variant you want represented.
Fix any mismatches
Review decoupling too
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Documents

    Documents are markdown text files which describe project goals, capture details, or even simulation outputs.

    Assets

    FSM1LP-thumb.png

    FSM1LP-thumb.png

    FSM1LP-thumbThumbnail
    FSM1LP

    FSM1LP

    FSM1LP Symbol.svgDefault
    kicad_mod

    FSM1LP

    FSM1LP.kicad_modFootprint
    stp

    FSM1LP

    FSM1LP.stp3D Model

    FSM1LP

    FSM1LP thumbnail
    Tactile Switch SPST-NO Top Actuated Surface Mount The FSM1LP is a surface-mount tactile (momentary) switch manufactured by TE Connectivity under the ALCOSWITCH series. It is a low-profile, top-actuated pushbutton switch designed for compact PCB applications requiring reliable user input. This switch operates as a momentary SPST-NO (Single Pole Single Throw – Normally Open) device, meaning it only conducts when pressed and returns to open when released. Key Features Switch Type Tactile momentary (OFF–(ON)) pushbutton Contact Configuration SPST-NO (Normally Open) Mounting Type Surface Mount (SMD) with gull-wing leads Actuation Style Top-actuated round button Electrical Rating 50 mA @ 24 VDC Operating Force Approximately 1.57 N (~160 gf) Low Profile Design Compact height (~3–3.5 mm typical), suitable for slim devices Mechanical Life Around 100,000 cycles Contact Material Copper alloy with silver plating for reliable conductivity Compact Size Typically ~6 × 6 mm footprint RoHS Compliant Lead-free and environmentally compliant tactile switch momentary 4 pin smd #CommonPartsLibrary #Switch

    Properties

    FSM1LP

    TE Connectivity

    Electromechanical Components

    te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Catalog+Section%7F1308111-1_SWITCHES_CORE_PROGRAM_CATALOG%7F0308%7Fpdf%7FEnglish%7FENG_CS_1308111-1_SWITCHES_CORE_PROGRAM_CATALOG_0308.pdf%7F1-1437565-6

    S

    creativecommons.org/licenses/by/4.0/

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    Controls

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