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Thermal Sensors
TRS Thermal Reed Switch
Overview
Applications
The TRS Thermal Reed Switch is a highly reliable, precise
temperature-sensitive switch ideal for energy conservation.
Its unique proprietary design features a magnet and
a temperature-sensing soft ferromagnetic substance
called Thermorite®. The material’s magnetic flux density
decreases as the temperature increases turning it into a
paramagnetic substance at the Curie temperature.
Typical applications include temperature detection and
overheat monitoring of electric appliances, heat-retention
heater control for rice cookers, defrost for air conditioners
and vending machines, roll heater temperature control for
copying machines, radiator water temperature detection for
automotive electric fan control.
These products have also been attested by the International
Relay Association.
Benefits
• High reliability for on/off operations
• High-speed response
• Long operational life
• Excellent environmental durability
• Extremely simple circuit design
• Compact, light and easy to handle
• Dust, explosion and corrosion-proof
Axial Type
• Wide range of operating temperatures available
from −10°C to +130°C
• Excellent temperature accuracy of ±2.5°C
• UL and CSA approved for TRS5***BLRU 100V
• UL approved for TRS5***BLRVU 200V
• RoHS/REACH compliant
Wire Harness Type
Case Type
Molded Type
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
One world. One KEMET
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Thermal Sensors – TRS Thermal Reed Switch
Ordering Information
M- TRS
3-
50
M CR
00
Maximum
Shape Series Opening/Closing
Power (W)
Operating
Temperature
(°C)
Contact
Type
Shape
Classification
Lead
Type
Blank
M=
Mold
TRS 1 = 10.0 W
3 = 35.0 W
5 = 60.5 W
M10 = −10°C
0 = 0°C
5 = 5°C
10 = 10°C
15 = 15°C
20 = 20°C
25 = 25°C
30 = 30°C
35 = 35°C
40 = 40°C
45 = 45°C
50 = 50°C
55 = 55°C
60 = 60°C
65 = 65°C
70 = 70°C
75 = 75°C
80 = 80°C
85 = 85°C
90 = 90°C
95 = 95°C
100 = 100°C
105 = 105°C
110 = 110°C
115 = 115°C
120 = 120°C
125 = 125°C
130 = 130°C
B = Break
M = Make
Blank = Molded axial
CR = C shape fixing bar
LR = L shape fixing bar
SR = S shape
Blank
00 = Wire
harness
01 = Lead
terminal
01E =Lead
terminal
(S shape
only)
Structures and Principles of Operation
Thermal Reed Switches (TRSTM) are temperature-sensing switches composed of a magnet and a temperature-
sensing soft ferromagnetic substance called ThermoriteTM. This material's saturation magnetic flux density
decreaSsetsrauscthteutreemspearantudre Pinrcrienacseisp, alendsitotufrnOs pinetoraa ptiaoranmagnetic substance at the Curie temperature.
V
Rated
Voltage
(VDC)
Blank = 100 V
V = 200 V
U
Approvals
Blank = No
approvals
U = UL and CSA
approved for
100 V and UL
approved for
200 V
Thermal Reed Switches (TRS) are temperature-sensing switches composed of a magnet and a temperature-sensing soft
TeOmuprfienesrcerarlrfote-umdareseavegesslneo, enpatesnidicdnTgsihtufetbemusrrrotniartsienteicnieTstohcteeaamrllmppeeadorraraTtiumthereeargsmennoesrtiniitcges.feuTrbrhisitsetaumnticalietzeianrigtaiCltssurCsieau-ttrueiemratpteeiomrantpumereraa, gtunreet.ic flux density decreases as the temperature
where ferrites lose its magnetic property.
TheTrmheormiteocrhitaengpersoiptsemrtaigensetic property rapidly at Curie-temperature.
Feat urTehseorfmToherirtmeocrihteanasgetesmiptseramtuargensentiscinpgrmopateerrtiayl.rapidly at its Curie temperature, providing quick response times.
(1)
(2)
(3)
••ACS turTTabrbhhiielteeer-artaCermygmuaosprihrnieeiasrtptaetetmeuimasroevispasdttieolaoarbranbloltheeutaarzvaesaagrrcodayeofiranuaTssmshttgiiemcmarssem.o. aiosdrtviuaternecdeaosn,ebdsehcnaaouztsaevraidtrodyuewpseigtnhadssti.omnec,oamspiotuinsdbinagsreadtioo.n
a
compounding
ratio.
Thermal property of Thermorite
6000
5000
4000
Permeability - temperature
(1kHz-0.01Oe)
TC=30
TC=60
TC=90
TC=120
3000
TC=150
2000
1000
0
0 20 40
TC=Curie temperature
60 80 100 120 140 160
Temperature(℃)
Saturation magnetic flux density ‒ temperature
3500
3000
2500
2000
1500
1000
500
TC=90
TC=60
TC=30
TC=150
TC=120
0
0 20 40 60 80 100 120 140 160
Temperature(℃)
Structure of reed switch
Encasing
Reed switch is contact switch comprised of a pair of
Fe-Ni alloy reeds encased in glass tube
with inactive gas. The reeds are switched on or off
by magnetic field of permanent magnet or magnet
Inactive gas
coil.
Long lifetime, High environmental resistance
because of protected contact by glass encasing.
N
Reeds in glass tube become magnetized with
mcfioeanlgd©FnnoedrKcetitEtsLiMaeacapuEcdfpThieeeEradlloerdatschl,,eter,aotrFhnnLe(idcs3swr3teC3hiet0oecd1rhnpsUoosStrweanAtp)io•o.a9nrrA5ae4tKnee-7Edd6aMs6nthE-dc2eT8ondT0nio0mstwacaecowgrtnw•nnaOewentn.cikdecteEmaestt.cBoromward
S
Boulevard
(switch off).
Glass tube
Contact
Fe-Ni alloy reed
N
S
S
N
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3000
TC=150
2000
1000
Thermal Sensors – TRS Thermal Reed Switch
0
0 20 40 60 80 100 120 140 160
Structures and PrinciplesTCo=CfurOie ptemeprearattuiroe n cont’dTemperature(℃)
2000
1500
1000
500
TC=90
TC=60
TC=30
TC=150
TC=120
0
0 20 40 60 80 100 120 140 160
Temperature(℃)
Reed switch structure
• The reed switch is a coSnttrauccttusrweitocfhrceoemd pswrisitecdhof a pair of Fe-Ni alloy
reeds encased in a glass Rtuebede swwiitthchinisacotinvteacgtassw.itTchhecormeepdrisseadroefsawpiaticrhoefd
on or off by the magneticFfeie-Nldi aolfloay preeerdms aennceanstedminaggnlaests oturbme agnet coil.
The reeds in the glass
field, allowing the two
rteuebwbcdoeyisitlbhm.teoiacngmaoncmeattikiveceemfgcieaaolsgnd.ntToaehfcteitpzeraeerndmeddfasrncoaeomrnnetntsmhewceaigttmcn(hesaetwgdointrocenmhtioacorgnno)ef.ft
When the magnetic field dLisoanpgpleifaertsi,mteh,eHreieghdsesnevpiraornamteeanntadl dreisscisotnanecect
(switch off).
because of protected contact by glass encasing.
• TrehseisgtlaanscseeanncdasaelmonegntoopfemcRtrohaaengeetnindeorcesentteaiiecndlaslcfighifeeelalon.dstsh,sueartrneu(dsbswehthiibtgecehhncoeotwnnm)vo.eirrAomenneadmdgstnehecnetontianzmlteadacgtwnaeinttidhc
field disappears, the reeds separate and disconnect
TRS principle: Break (B) ty(psewitch off).
TTRRSS pprriinncciippllee :: BBrreeaakk ((BB)) ttyyppee
■:Permanent magnet ■:Thermorite® ■:Reed switch contact area )
■:Permanent magnet ■:ThermoriteR®e se■t:teRmepeedrastwurietch contAaccttioanretaem)perature
Reset temperature
Action temperature
Encasing
Inactive gas
N
S
Glass tube
Contact
Fe-Ni alloy reed
N
S
S
N
LLooww tteemmppeerraattuurree
Thermal magnet = paramagnet
Thermal magnet = paramagnet
HHiigghh tteemmppeerraattuurree
Thermal magnet = NO magnetic
Thermal magnet = NO magnetic
N SN
N SN
SN S
SN S
NS
NS
NS
NS
NEC TOKIN Sensors Vol.14 5
SN
N
S N SS N
N SN
N SN
S ANll speScifications in this catalog and prodNuctioSn status of NproduScts are subject to change without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.
S PNleaseSrequest for a specification sheet Nfor deStailed produNct daSta prior to the purchase.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
<Magnetic Field of Contact Part>
MagMneatigcnFeltuixc FFoiremldingof=C> oRneteadcst wPitacrht>ON
<Magnetic Field of Contact Part>
MaMgnaegtniceFtilcuxFie0ld=o>f RCeoend tsawcittcPhaOrtFF
MaSgnetic Flux ForminNg => Reed switch ON
SN
Magnetic Flux ≒0 => Reed switch OFF
2015.3.31 0000SENVOL14E1503H1
S
S
SSwwiittcchh OONN
N
N
SSwwiittcchh OOFFFF
TTRRSSTppRrriinnScciipppllreein:: MMcaaipkkeele((MM: ))Mttyyappkee e (M) type
■:Permanent magnet ■:Thermorite® ■:Gapspacer(SP) ■:Reed switch contact area )
■:Permanent magnet ■:ThermoriteR®e se■t:teGmappesrpaatucreer(SP)A c■tio:nRteeemdpeswraittucrhe contact area )
Reset temperature
Action temperature
LLooww tteemmppeerraattuurree
Thermal magnet = paramagnet
Thermal magnet = paramagnet
HHiigghh tteemmppeerraattuurree
Thermal magnet = NO magnetic
Thermal magnet = NO magnetic
N S N S SP N S N S
N S N S SP N S N S
N S N S SP N S N S
N S N S SP N S N S
<Magnetic Field of Contact Part>
<Magnetic Field of Contact Part>
Magnetic Flux ≒0 => Reed switch OFF
Magnetic Flux ≒0 => Reed switch OFF
SSwwiittcchh OOFFFF
NS
NS
SN
SN
NN SS
SS N
N
NS
NS
SN
SN
NN SS
<Magnetic Field of Contact Part>
<Magnetic Field of Contact Part>
NS
NS
N
N
SSwwiittcchh OONN
S
S
6 NEC TOKIN Sensors Vol.14
6 NEC TOKIN Sensors Vol.14
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com●PAlel aspsecriefiqcuaetisotnfsorinatshpiseciafitcaalotigonansdheperot dfourcdtieotnaisletadtupsroodfupcrtodautcatspraiorer tsoubthjeecpt utorcchhaasneg. e without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.
●BPelefaosree uresqinugestht efoprraodsupcetciinfictahtisiocnasthaeloegt, fpolredaesteairleeaddp"rPodreuccatudtaiotnasp"raionrdtootthheer psuarfcehtyaspere. cautions listed in the printed version catalog.
●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.
2015.3.31 0000SENVOL14E1503H1
2015.3.31 0000SENVOL14E1503H1
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External magnetic field
Thermal Sensors – TRS Thermal Reed Switch
TRS/OHD installation direction in external magnetic field
ExEtMexrantgaenlermtnicaaglenleMdtifcraogmenldeequtiipcmeFniteld
TRTSR/OSHinDsitnasltlaalltaitoionnidnirexcttieonrninalemxteargnnael mticagfnieltidc field
Magnetic field emitting equipment
such as motors, coils
Magnetic field from equipment
Magnetic field emitting equipment
such as motors, coils
Wrong direction Correct direction
NS
NS
Magnet inside TRS is
parallel to the external field
→ Greater Influence
NS
Wrong direction Correct direction
NS
Magnet inside TRS is
perpendicular to the external field
→ Less influence
Magnet inside TRS is
parallel to the external field
→ Greater Influence
Magnet inside TRS is
perpendicular to the external field
→ Less influence
Ferromagnetic material influence
Ferromagnetic material influence
3
Ferroma2gnetic material influence
1
03
1 2
2 1
3 0
4 1
5 0 2 2
3
4
BType
MType
TRS
d
BType
4 6 8 10 12 14 16
MType
Soft iron (thickness 3.3mm)
Gap distance_dmm
TRS
Note; Above figures are for reference only and are not guarantee d values.d
5
0 2 4 6 8 10 12 14 16
Soft iron (thickness 3.3mm)
Gap distance_dmm
Before Using Thermal Reed Switch (TRS
TM )
Note; Above figures are for reference only and are not guarantee d values.
• Please ask for a copy of specification and check the contents thoroughly before the actual use.
• Please contact us before deciding your specifications.
Do
Do
nnBooettfouursseeeUiinfsdincrlgoopsTephepedrrmooxarimlsRtiretoyendtgoSlyswtsriohtcnohgck(lTyeRdmS. agnetizTeMd)
parts.
• Do N• POleTausseeawskitfhogr raecaotepryloaf dsptehcainficsapteiocnifiaendd. check the contents thoroughly before the actual use.
W h•ePnleinastealcloinngtathctesues sbweiftocrheeds eincicdiirncguiytsouprosnpectoificparotidouncsi.ng surge voltage (inductive load) or rush current
(in l•aDmopnsoatnudsemiontcolross),eapnraopxipmroitpyrtiaotsetsrownitgclhy tmypagensehtoizueld bpearuts.ed, or a contact point protection circuit added.
• Avo•iDdostnreostsu(esespief cdiraollpypteodrsoiorns)trionncgaslyesohfoacdkdeidti.onal processing.
• Each• DreoeNdOswT iutscehwhaitshagsrpeeacteifircloreasdotnhaanncsepferecqifiueedn. cy. Please contact us when an oscillation is added.
W hen installing these switches in circuits prone to producing surge voltage (inductive load) or rush current
(in lamps and motors), an appropriate switch type should be used, or a contact point protection circuit added.
• Avoid stress (especially torsion) in case of additional processing.
NEC TOKIN Sensors Vo l.174
• Each reed switch has a specific resonance frequency. Please contact us when an oscillation is added.
cications in this catalog and production status ofopr
request for a specication sheet for detailed prodduct
using the product in this catalog, please read "Pretcau
ducts are subject to change without notice. Prior to the purach
ata prior to the purchas.e
ions" and other safety precautions listed in the printed veorsi
se, please conNtaEcCt NTECOTKOINKINSfeornuspodrasteVd op rlo.1d7u4ct.data
n catalog.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
APllel sapseecriecqauteiosFnt osforirntaLthsaipsuecdcaietacrldaotgaiolanen,sdFhpeLreo3tdf3uo3cr td0ioe1ntaUsilteaSdtAupsroo9dfodup5cr4t -76d6au-tc2at8sp0ariro0er stouwbthwjeecwpt ut.okrcechhmaasne.egte.cwoimthout notice. Prior to the purach
Before using the product in this catalog, please read "Pretcau ions" and other safety precautions listed in the printed veorsi
2015.3.31 0000SENVOL14E1503SH1E0201_TRS • 10/29/2018
se, please contact NEC TOKIN for updated product.data
n catalog.
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Thermal Sensors – TRS Thermal Reed Switch
Dimensions – Millimeters
Part
Number
TRS5-***BLR00
TRS5-***BLR00V
Dimensions - Millimeters
TRS1-***MLR00V
TRS3-***MLR00
TRS5-***BLRU
TRS5-***BLRVU
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
SE0201_TRS • 10/29/2018
5