<?xml version="1.0" encoding="utf-8"?>
<!-- Created by:  XBRL Wizard, EasyX -->
<!-- Document created: 28-06-2024 13:54:51 -->
<!-- Version:  -->
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      </link:roleType>
      <link:roleType roleURI="https://www.esma.europa.eu/xbrl/role/all/ias_1_role-410000" id="sectra_ias_1_role-410000">
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="https://www.esma.europa.eu/xbrl/role/all/ias_1_role-210000" id="sectra_ias_1_role-210000">
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        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="https://www.esma.europa.eu/xbrl/role/all/ias_1_role-610000" id="sectra_ias_1_role-610000">
        <link:definition>[610000] Statement of changes in equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      </link:roleType>
      <link:roleType roleURI="https://www.esma.europa.eu/xbrl/role/all/esef_role-000000" id="sectra_esef_role-000000">
        <link:definition>[000000] Tags that must be applied if corresponding information is present in a report</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>gen:link</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://sectra.se/role/Anchoring-999999" id="sectra_Anchoring-999999">
        <link:definition>[999999] Anchoring</link:definition>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>gen:link</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
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  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <xsd:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd" />
  <xsd:import namespace="http://xbrl.org/2008/generic" schemaLocation="http://www.xbrl.org/2008/generic-link.xsd" />
  <xsd:import namespace="https://www.esma.europa.eu/taxonomy/2022-03-24/esef_cor" schemaLocation="https://www.esma.europa.eu/taxonomy/2022-03-24/esef_cor.xsd" />
  <xsd:element name="TotalIncome" id="sectra_TotalIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CurrentAccrualsAndCurrentDeferredIncomeOtherThanCurrentContractLiabilities" id="sectra_CurrentAccrualsAndCurrentDeferredIncomeOtherThanCurrentContractLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="ConversionToShares" id="sectra_ConversionToShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
</xsd:schema>