THERMAL CUTOFFS

NTE8000 thru NTE8035 Radial Lead Thermal Cutoff (Thermal Fuse) Description: The TCO (Thermal Cut−Off) responds to temperature by interrupting an electrical circuit when the operating and/or environ-mental temperature exceeds the thermal rating of the device. Radial lead TCOs accomplish this when the internal fusible alloy is melted by reaching the temperature of the melting point of the alloy, forming two separate balls at the edges of the leads by surface tension of the alloy to permanently open the circuit.

Axial−lead TCO devices presently predominate over radial−lead devices. This results, at least in part, from design difficulties that exist in manufacturing a reliable, inexpensive radial−lead TCO device. However, in many circuit applications radial−lead devices are preferable since they take up a smaller area on a printed circuit board. Their compact size enables ease of assembly into the smallest of transformers ensuring total thermal protection Features D Maximum Rating: 5 Amps, 250 Volts D Typical Operating Temperature Tolerance +1−2°C D Full 2 3/4” leads to fit all replacement configurations D All types meet the requirements of Underwriters Laboratories Specifications and CUL D RoHS Compliant Characteristics NTE Type No.

Diag.

No.

8000 8005

Functioning Temperature

Holding Temperature

Maximum Temperature

°C

°F

°C

°F

°C

°F

729

76

168

53

127

200

392

729

86

187

61

142

200

392

8010 8015

729 729

102 115

216 239

77 89

171 192

200 200

392 392

8020

729

130

266

103

217

200

392

8025 8030

729 729

136 145

277 293

111 118

232 244

200 200

392 392

8035

729

150

302

123

253

200

392

Diagram 729

.106 (2.7)

.260 (6.6)

.276 (7.0)

2.756 (70.0) .031 (0.8)

.135 (3.44)

Note 1. Temperature sensitive devices. Do not store above +48°C (+120°F).

Note 2. With proper air flow, heat generation below 5 Amps is minimal, above 5 Amps the upper limit on the currentcapacity will depend on the environment for each specific application.

Note 3. A general rule of thumb for continuous operating temperature for thermal cut−offs is 30°C less than the Maximum Opening Temperature.

NTE8065 thru NTE8242 Thermal Cutoff (Thermal Fuse) Description: Twenty One Thermal Cut−offs (also known as Thermal Fuses) are now included in the NTE product line. They are miniature, NON−RESETTABLE temperature sensitive devices designed to prevent appliances and electronic equipment from overheating. NTE thermal cutoffs are UL and CSA listed.

Literally thousands of different applications have been devised for thermal−cutoffs, thus providing a large replacement market. Such applications include:  Hair Dryers  Refrigerators  Battery Chargers  Irons  Hot Plates  Glue Guns  Electric Motors  Window Fans  Coffee Makers  Microwave Ovens  Popcorn Poppers  Dishwashers  Toasters  UPS  And hundreds of others The TCO (Thermal Cut−Off) responds to temperature by interrupting an electrical circuit when the operating and/or environmental temperature exceeds the thermal rating of the device. This is accomplished when the internal organic pellet experiences a phase change, allowing the spring activated contacts to permanently open the circuit.

NTE Type No. 8065 8070 8076 8081 8085 8090 8096 8098 8103 8108 8115

Diag.

No. 193 193 193 193 193 193 193 193 193 193 193

Electrical Rating Volts 120/250 VAC 240 VAC 277 VAC

Functioning Temperature C 66 72 77 84 87 93 98 100 104 109 117

F 151 162 171 184 189 200 209 212 220 228 243

Holding Temperature C 42 50 − 60 − − 76 − 80 88 −

Interrupting 15A 25A RES 20A RES

F 108 122 − 140 − − 169 − 176 190 −

Maximum Temperature C 130 115 − 125 − − 140 − 150 140 −

F 266 239 − 257 − − 284 − 302 284 −

Continuous 10A 16.7 RES 15A RES

NTE Type No. 8118 8125 8139 8149 8167 8181 8182 8213 8226 8242

Diag.

No. 193 193 193 193 193 193 193 193 193 193

Electrical Rating Volts 120−277 VAC 180 VAC

Functioning Temperature C 121 128 141 152 170 184 192 216 228 240

F 250 263 286 306 338 364 378 421 443 464

Holding Temperature C 94 106 117 128 146 160 162 191 − 200

Interrupting 125VA Pilot Duty 3A Motor Rating

F 201 223 243 262 295 320 324 376 − 392

Maximum Temperature C 170 155 171 176 300 300 290 241 − 290

F 338 311 340 349 572 572 554 466 − 554

Continuous

Diagram 193 FEATURES:  Maximum Current Rating: 15 Amps  Typical Opening Temperature Tolerance: +0C, −5C 3.220 (81.78) Max  18 Gauge Solid Copper Wire  Full 1 1/3 ” leads to fit all replacement configurations 1.380 (35.0) .457 (11.6) Max 1.383 (35.1) ** Case End Epoxy End  All types meet the requirements of Underwriters Laboratories Specifications, CSA, and VDE.  Each device comes packaged with 2 crimp splices for solderless connection.

NOTE: Tin plated lead NOTE: Silver plated lead S UL File No. E212625 S UL File No. E126429 .160 (4.1) Dia. S UL File No. E117626 (Guide # XCMQ2) S C−UL File No. E117626 (Guide # XCMQ8) ** Some devices may have a lead length of .660 (12.8) S CSA File No. LR43279 S VDE File No. 115369 Note 1: Temperature sensitive devices. Do not store above +48C (+120F).

Note 2: Color Band does not denote temperature group.

Note 3: The electrical resistance of the NTE series thermal cut−off is comparable to that found in an equal length of 18 gauge solid copper wire. With proper air flow, heat generation below 15 Amps is minimal, above 15Amps the upper limit on the currentcapacity will depend on the environment for each specific application.

Note 4: A general rule of thumb for continuous operating temperature for thermal cut−offs is 30C less than the Maximum Opening Temperature.

Rev. 5−16