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

Tf Functioning open temperature.
Th Holding temperature:
Maximum continuous exposure temperature during operation
Tm Maximum 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)
Tf type Th Tm type Th Tm type Th Tm
65 K06F 55 200 T06F 50 200 Y06 1) 45 200
76 – – – T0F 55 200 Y0F 55 200
86 – – – T1F 60 200 Y1F 60 200
102 K2F 80 200 T2F 75 200 Y2F 70 200
115 K3F 99 200 T3F 95 200 Y3F 90 200
127 K4F 110 200 T4F 110 200 Y4F 100 200
133 K13F 110 200 T13F 105 200 Y13F 100 200
136 K5F 115 200 T5F 105 200 Y5F 105 200
139 K6F 120 200 T6F 120 200 Y6F 115 200
145 K7F 125 200 – – – Y7F 125 200
tolerance (K) 0/-10 0/-10 0/-10
wire (mm) Ø 0.53 Ø 0.53 Ø 0.70

Thermal Cut-Off 250 Vac

S3M7 5A S3M4 10A SDFS/SDFL 15A
temperature rating (°C)
Tf type Th Tm type Th Tm type Th Tm (VDE) Tm (UL)
66 – – – – – – DF 42 110 130
70 E7F 55 125 E4A 55 130 – – – –
72 – – – E4A 57 100 DF 50 115 110
77 E7F 62 125 E4A 62 125 DF 55 120 110
84 E7F 69 125 E4A 69 125 DF 60 125 114
91 – – – – – – DF 67 135 121
93 E7F 78 140 E4A 78 140 – – – –
98 E7F 83 140 E4A 83 140 DF 76 140 130
100 E7F 85 130 E4A 85 140 DF 78 135 250
104 – – – E4A 89 150 DF 80 150 150
110 E7F 95 140 E4A 95 150 DF 88 140 140
117 E7F 102 150 E4A 102 160 – – – –
119 – – – – – – DF 95 170 170
121 E7F 106 150 E4A 106 160 DF – – –
128 E7F 113 150 E4A 113 205 DF 106 155 155
141 – – – – – – DF 117 171 171
144 E7F 129 175 E4A 129 240 DF 120 250 250
152 E7F 137 175 E4A 137 205 DF 128 176 175
167 E7F 152 200 E4A 152 240 – – – –
170 – – – – – – DF 146 300 190
172 E7F 157 200 E4A 157 240 – – – –
184 E7F 169 200 E4A 169 210 DF 160 300 214
190 E7F 175 270 E4A 175 310 DF – – –
192 – – – E4A 177 210 DF 162 290 222
205 – – – E4A 189 310 – – – –
216 – – – E4A 200 375 DF 1) 191 241 –
228 – – – – – – DF 193 300 300
229 – – – E4A 200 375 – – – –
240 – – – E4A 200 450 DF 200 290 260
tolerance (K) 0/-5 0/-5 0/-5
wire (mm) Ø 0.57 Ø 1.0 Ø 1.02 / AWG18

Thermal Cut-Off 250 Vac

S3M5 20A S3M8 25A
temperature rating (°C)
Tf type Th Tm type Th Tm
66 – – – – – –
70 E5A 55 175 E8A 45 175
72 E5A 57 175 E8A 47 175
77 E5A 62 200 E8A 52 200
84 E5A 69 200 E8A 59 200
91 – – – – – –
93 E5A 78 215 E8A 68 215
98 E5A 83 215 E8A 73 215
100 E5A 85 215 – – –
104 E5A 89 225 E8A 79 225
110 E5A 95 225 E8A 85 225
117 E5A 102 235 E8A 92 235
119 – – – – – –
121 E5A 106 235 E8A 96 235
128 E5A 113 235 E8A 103 235
141 – – – – – –
144 E5A 129 250 E8A 119 250
152 E5A 137 250 E8A 127 250
167 E5A 152 285 E8A 142 285
170 – – – – – –
172 E5A 157 350 – – –
184 E5A 169 350 E8A 159 350
190 E5A 175 350 – – –
192 E5A 177 350 E8A 167 350
205 E5A 189 375 – – –
216 E5A 200 375 – – –
228 – – – – – –
229 E5A 200 375 E8A 200 375
240 E5A 200 375 E8A 200 375
tolerance (K) 0/-5 0/-5
wire (mm) Ø 1.0 Ø 1.0

1) VDE approved only

Thermal Cut-Off 250 Vac

MTNF 1A MTML 1A MTHF 2A MTEF 3A
temperature rating (°C)
Tf type Th Tm type Th Tm type Th Tm type Th Tm
65 N06F 1) 50 200 – – – H06F 50 200 E06F 50 200
76 N0F 50 200 – – – H0F 50 200 E0F 55 200
86 N1F 60 200 – – – H1F 60 200 E1F 65 200
102 N2F 75 200 L10 75 165 H2F 75 200 E2F 70 200
115 N3F 95 200 L20 85 165 H3F 95 200 E3F 90 200
125 – – – L30 90 165 – – – – – –
127 N4F 105 200 – – – H4F 100 200 E4F 95 200
130 – – – – – – – – – – – –
133 N13F 105 200 L33 100 165 H13F 1) 100 200 E13F 95 200
136 N5F 100 200 – – – H5F 100 200 E5F 95 200
139 N6F 110 200 – – – H6F 110 200 E6F 105 200
145 N7F 125 200 – – – H7F 110 200 E7F 115 200
tolerance (K) 0/-10 0/-10 0/-10 0/-10
wire (mm) Ø 0.53 Ø 0.52 Ø 0.55 Ø 0.70

Thermal Cut-Off 250 Vac

MTR1 3A 2) MTS1 5A MWS1 15A MWS2 20A
temperature rating (°C)
Tf type Th Tm type Th Tm type Th Tm type Th Tm
98 R-95 70 180 – – – – – – – – –
100 – – – S95 3) 70 180 S95H 3) 70 180 S95 3) 70 180
108 R-105 80 180 – – – – – – – – –
110 – – – S105 2) 80 180 S105H 2) 80 180 S105 3) 80 180
130 R-125 100 180 S125 2) 100 180 S125H 3) 100 180 – – –
143 – – – S138 2) 110 180 – – – – – –
150
(not RoHS Comp.)		 – – – – – – S145H 3) 120 180 S145 3) 120 180
tolerance (K) 0/-10 0/-10 0/-10 0/-10
wire (mm) Ø 0.60 Ø 0.70 Ø 1.20 Ø 1.60

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

Ordering Example

   [ S3M4E4A00121 ]
S3M4 E4A 00 121
sales name type
(manufacturer designation)		 construction / code:
00 / S (one side short);
01/L (both sides long)		 temperature Tf
L50N 1) 5/10/20/25A L10N1) 3/8A
temperature rating (°C)
Tf type Th Tm type Th Tm
For Ratings see
SDFS/SDFL 15a
71 – L10N 55 175
72 L50N – – –
77 L50N L10N 55 175
84 L50N – – –
85 – L10N 55 175
90 – L10N 60 175
93 L50N – – –
98 L50N – – –
100 L50N L10N 70 175
104 L50N – – –
108 – L10N 78 175
110 L50N – – –
117 L50N – – –
118 – L10N 88 175
121 L50N – – –
128 L50N – – –
130 – L10N 100 175
140 – L10N 110 175
144 L50N – – –
150 – L10N 120 175
152 L50N – – –
165 – L10N 135 175
167 L50N – – –
172 L50N – – –
184 L50N – – –
190 L50N – – –
192 L50N – 200 375
205 L50N 3) –
216 L50N 3) –
229 L50N 3) –
240 L50N 3) – – –
tolerance (K) 0/-5 0/-5
wire (mm) see chart below see 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
type lead code temp. max. operating voltage max. diameter insulation cross section diameter UL style
L10N stranded white L330 200°C 600 V 0.90 mm AWG24/0.24 mm2 3557
L10N G911 stranded white L340 200°C 600 V 1.26 mm AWG20/0.61 mm2 3557
L50N stranded white L350 200°C 600 V 1.50 mm AWG18/0.96 mm2 3557
L50N solid yellow L440 200°C 300 V 1.51 mm AWG20/0.81 mm 1332

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