K-F Series TAMURA Axial Leads Resistor Type Temperature Fuse Non
Resettable Thermal Cutoff
●It is a fusible aloy type thermal links corresponding to RoHS.
● It is excellent small in the thermosensing property.
●It is non-return type of thermal links. It means even if the
ambient temperature falls after the thermal link operates but never
re-connection.
●46 substances of very high concern (SVHC) specified by the REACH
rule is not used. (46 substances are published on December 15,
2010)
Unit : mm
| A | B | C | D | E |
| 6.0土0.3 | 1.5土0.1 | 1.8 and under | 0.53士0.05 | 68士3.0(K□F) 38士3.0(K□F~C) |
| Model name | Rated functionig lemperature | Functioning temperture | AC/DC | Rated Vollage | Rated current | Th [C] | Tm [C] | Normal al opernling temperalure |
| K06F* | 65 | 61土3 | AC | 250 | 1.0 | 55 | 200 | 45 |
| K0F | 76 | 72土3 | AC DC | 250 125 50 | 1.0 1.5 2.0 | 55 55 50 | 200 | 50 50 45 |
| K1F | 86 | 81土2 | AC DC | 250 125 50 | 1.0 1.5 2.0 | 60 55 50 | 200 | 55 55 50 |
| K2F | 102 | 98士3 | AC DC | 250 125 50 | 1.0 1.5 3.0 | 80 75 70 | 200 | 70 70 65 |
| K3F | 115 | 111土2 | AC DC | 250 125 50 | 1.0 2.0 3.0 | 99 95 90 | 200 | 85 85 80 |
| K4F | 127 | 123+2 | AC DC | 250 125 50 | 1.0 2.0 3.0 | 110 110 110 | 200 | 90 90 80 |
| K13F | 133 | 129士3 | AC DC | 250 125 50 | 1.0 2.0 3.0 | 110 105 95 | 200 | 90 90 80 |
| K5F | 136 | 131士2 | AC DC | 250 125 50 | 1.0 2.0 3.0 | 115 105 95 | 200 | 90 90 80 |
| K6F | 139 | 134士2 | AC DC | 250 125 50 | 1.0 1.5 3.0 | 120 120 105 | 200 | 90 90 80 |
| K7F | 145 | 140士2 | AC DC | 250 125 50 | 1.0 2.0 3.0 | 125 125 120 | 200 | 115 115 80 |
Introduction
•Thermal fuse has a limited service life.
The thermal element of the thermal fuse is made of durable
materials designed for long-term use. However, the service life of
a thermal fuse depends on its application environment, especially
if the thermal fuse is exposed to an environment close to its
operating temperature for a long time.
Therefore, we recommend that the designer conduct a reliability
test, that is, install the thermal fuse in the actual final
application environment and simulate a normal operating condition
to predict the service life of the device.
•When current passes through the thermal fuse, the temperature of
its body rises.
The thermal fuse may heat up to the temperature of the body higher
than the surrounding temperature due to conduction. In addition,
the body temperature of the fuse may also increase due to many
other factors such as installation methods. Therefore, we recommend
that the designer measure the body temperature of the thermal fuse
after performing the reliability test.
•Please remember to use a voltage and current lower than the rated
value of the thermal fuse.
If a voltage and current higher than the rated value of the thermal
fuse are used, the contacts in the SF type may fuse together and
cause the thermal fuse to malfunction; the SM type and D6 type may
also rupture.
•Please do not use the thermal fuse in an environment outside the
standard specifications, such as an environment containing sulfur
dioxide, nitrogen oxide gas, ammonia or formic acid. Its products
are also not suitable for use in high humidity environments or
immersed in liquids.
The housing of the thermal fuse* is made of copper alloy.
Therefore, installing a thermal fuse under these or similar
conditions may cause damage to the packaging resin or cracks in the
case due to corrosion. As a result, the thermal fuse may operate
when the operating temperature is below the operating temperature,
or not operate when the operating temperature is exceeded.
