NTE8000 Datasheet, PDF (1/1 Pages) NTE Electronics – Radial Lead Thermal Cutoff

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. NTE's 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 diffi‐
culties 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 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.
8000
8005
8010
8015
8020
8025
8030
8035
Diag.
No.
729
729
729
729
729
729
729
729
Functioning
Temperature
°C
°F
76 168
86 187
102 216
115 239
130 266
136 277
145 293
150 302
Holding
Temperature
°C
°F
53 127
61 142
77 171
89 192
103 217
111 232
118 244
123 253
Maximum
Temperature
°C
°F
200 392
200 392
200 392
200 392
200 392
200 392
200 392
200 392
Diagram 729
.106 (2.7)
.276
(7.0)
.031 (0.8)
.260 (6.6)
2.756
(70.0)
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 currentcapac‐
ity 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.