THERMAL CUT-OFF

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Thermal Cut-Off

Thermal Fuses

HDM | L10 | L50 | MTEF | MTHF | MTKF | MTML | MTNF | MTR1 | MTS1 | MTTF | MTYF | MWS | SDF | S3M Thermal fuses are components which will automatically open a circuit and switch off an appliance, if the permissible operating temperature of the appliance is exceeded. The response temperature can only be set by the manufacturer. In order to repair the circuit, the complete thermal fuse must be replaced. Thermal fuses have a solid, dust and dirt- tight housing. They react to ambient temperature and are generally insensitive to current at rated levels.

THERMAL CUT-OFF

APPLICATIONS

Coffee machines, Hand driers, Information technology, Motors, Cookers, Gas heaters, Extractor hoods, Transformers, Stoves, Boilers, Ventilators, Computers, Choker Grills, Hot water appliances, Radio & TV’s, Laboratory equipment, Coils, Fryers, Hair applia

TfFunctioning open temperature.
ThHolding temperature:
Maximum continuous exposure temperature during operation
TmMaximum overshoot temperature:
Above this temperature the TCO might conduct again.
All current ratings relate to resistive loads.

Thermal Cut-Off 250 Vac

MTKF
1A
MTTF
1/2A
MTYF
4/5A
temperature rating (°C)
TftypeThTmtypeThTmtypeThTm
65K06F55200T06F50200Y06 1) 45200
76T0F55200Y0F55200
86T1F60200Y1F60200
102K2F80200T2F75200Y2F70200
115K3F99200T3F95200Y3F90200
127K4F110200T4F110200Y4F100200
133K13F110200T13F105200Y13F100200
136K5F115200T5F105200Y5F105200
139K6F120200T6F120200Y6F115200
145K7F125200Y7F125200
tolerance (K)0/-100/-100/-10
wire (mm)Ø 0.53Ø 0.53Ø 0.70

Thermal Cut-Off 250 Vac

S3M7 5AS3M4 10ASDFS/SDFL 15A
temperature rating (°C)
TftypeThTmtypeThTmtypeThTm (VDE)Tm (UL)
66DF42110130
70E7F55125E4A55130
72E4A57100DF50115110
77E7F62125E4A62125DF55120110
84E7F69125E4A69125DF60125114
91DF67135121
93E7F78140E4A78140
98E7F83140E4A83140DF76140130
100E7F85130E4A85140DF78135250
104E4A89150DF80150150
110E7F95140E4A95150DF88140140
117E7F102150E4A102160
119DF95170170
121E7F106150E4A106160DF
128E7F113150E4A113205DF106155155
141DF117171171
144E7F129175E4A129240DF120250250
152E7F137175E4A137205DF128176175
167E7F152200E4A152240
170DF146300190
172E7F157200E4A157240
184E7F169200E4A169210DF160300214
190E7F175270E4A175310DF
192E4A177210DF162290222
205E4A189310
216E4A200375DF 1) 191241
228DF193300300
229E4A200375
240E4A200450DF200290260
tolerance (K)0/-50/-50/-5
wire (mm)Ø 0.57Ø 1.0Ø 1.02 / AWG18

Thermal Cut-Off 250 Vac

S3M5 20AS3M8 25A
temperature rating (°C)
TftypeThTmtypeThTm
66
70E5A55175E8A45175
72E5A57175E8A47175
77E5A62200E8A52200
84E5A69200E8A59200
91
93E5A78215E8A68215
98E5A83215E8A73215
100E5A85215
104E5A89225E8A79225
110E5A95225E8A85225
117E5A102235E8A92235
119
121E5A106235E8A96235
128E5A113235E8A103235
141
144E5A129250E8A119250
152E5A137250E8A127250
167E5A152285E8A142285
170
172E5A157350
184E5A169350E8A159350
190E5A175350
192E5A177350E8A167350
205E5A189375
216E5A200375
228
229E5A200375E8A200375
240E5A200375E8A200375
tolerance (K)0/-50/-5
wire (mm)Ø 1.0Ø 1.0

1) VDE approved only

Thermal Cut-Off 250 Vac

MTNF 1AMTML 1AMTHF 2AMTEF 3A
temperature rating (°C)
TftypeThTmtypeThTmtypeThTmtypeThTm
65N06F 1)50200H06F50200E06F50200
76N0F50200H0F50200E0F55200
86N1F60200H1F60200E1F65200
102N2F75200L1075165H2F75200E2F70200
115N3F95200L2085165H3F95200E3F90200
125L3090165
127N4F105200H4F100200E4F95200
130
133N13F105200L33100165H13F 1)100200E13F95200
136N5F100200H5F100200E5F95200
139N6F110200H6F110200E6F105200
145N7F125200H7F110200E7F115200
tolerance (K)0/-100/-100/-100/-10
wire (mm)Ø 0.53Ø 0.52Ø 0.55Ø 0.70

Thermal Cut-Off 250 Vac

MTR1 3A 2)MTS1 5AMWS1 15AMWS2 20A
temperature rating (°C)
TftypeThTmtypeThTmtypeThTmtypeThTm
98R-9570180
100S95 3)70180S95H 3)70180S95 3)70180
108R-10580180
110S105 2) 80180S105H 2) 80180S105 3)80180
130R-125100180S125 2) 100180S125H 3)100180
143S138 2) 110180
150
(not RoHS Comp.)
S145H 3)120180S145 3)120180
tolerance (K)0/-100/-100/-100/-10
wire (mm)Ø 0.60Ø 0.70Ø 1.20Ø 1.60

1) VDE approved only 2) UL approved only 3) not approved

Ordering Example

   [ S3M4E4A00121 ]
S3M4E4A00121
sales nametype
(manufacturer designation)
construction / code:
00 / S (one side short);
01/L (both sides long)
temperature Tf
L50N 1) 5/10/20/25AL10N1) 3/8A
temperature rating (°C)
TftypeThTmtypeThTm
For Ratings see
SDFS/SDFL 15a
71L10N55175
72L50N
77L50NL10N55175
84L50N
85L10N55175
90L10N60175
93L50N
98L50N
100L50NL10N70175
104L50N
108L10N78175
110L50N
117L50N
118L10N88175
121L50N
128L50N
130L10N100175
140L10N110175
144L50N
150L10N120175
152L50N
165L10N135175
167L50N
172L50N
184L50N
190L50N
192L50N200375
205L50N 3)
216L50N 3)
229L50N 3)
240L50N 3)
tolerance (K)0/-50/-5
wire (mm)see chart belowsee chart below

Thermal Cut-Off 250 Vac

HDMV, HDMH 15A 2)
temperature rating (°C)
Tf
type
Th
Tm
78
DM
62
250
90
DM
68
250
99
DM
83
250
110
DM
86
250
120
DM
96
250
130
DM
112
250
140
DM
125
250
150
DM
135
250
170
DM 1)
145
250
182
DM
163
250
190
DM
170
250
tolerance (K)
0/-7
wire (mm)
6.3 x 0.8 mm
typeleadcodetemp. max.operating voltage max.diameter insulationcross section diameterUL style
L10Nstranded whiteL330200°C600 V0.90 mmAWG24/0.24 mm23557
L10N G911stranded whiteL340200°C600 V1.26 mmAWG20/0.61 mm23557
L50Nstranded whiteL350200°C600 V1.50 mmAWG18/0.96 mm23557
L50Nsolid yellowL440200°C300 V1.51 mmAWG20/0.81 mm1332

1) not approved 2) UL approved only 3) T>200°C on request   |   Deviations from standard types on request.