EYP-2BN143 Panasonic - ECG, EYP-2BN143 Datasheet - Page 6

• Manufacturer Part Number: EYP-2BN143
• Description: THERMAL CUTOFF 145C 2A/250VAC
• Manufacturer: Panasonic - ECG
• Series: Nr

Specifications of EYP-2BN143

• Holding Temperature @ Voltage: 120°C (248°F) @ 250V
• Rated Functioning Temperature: 293°F (145°C)
• Approvals: BEAB, CSA, UL, VDE
• Package / Case: Axial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: EYP2BN143; P10925

The following are precautions for individual products. Please also refer to the common precautions shown on page 4 of
this catalog.
● Design Applications
1. Use the TCO within their specifi ed temperature and electrical ratings.
2. To fully use the function of the TCO, a suitable TCO for each equipment application must be selected.
3. Avoid application of excessive vibration and mechanical stress to the TCO. Otherwise, failure of the fusible
4. The following 1) and 2) are precautions for thin type TCO (MP and MU series)
5. When sealing the TCO with resin, select a resin that does not corrode the seals or the lead wires(terminals).
6. When immersing equipment with a TCO in varnish or solvent and then drying it, repeat the test to check whether
7. Do not use under the following environments.
8. Do not use the TCO in aerospace equipment, atomic energy equipment, military weap ons, life saving
● Instruction
1. Forming and Cutting
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Safety Precautions (Handling Precautions)
1) Use the TCO under the maximum operating temperature specifi ed in the individual specifi cation.
2) The holding temperature is defi ned as the highest temperature at which the TCO is activated continuously at
3) Equipment should be designed so that its over shoot does not exceed the maximum temperature limit after
4) If the TCO is activated by voltage higher than the rated voltage or current higher than the rated current, the
5) Thermal element may be transformed and TCO may open when it is used in the environment from which an
6) Where transient overload is expected to be applied, repeat the tests under the worst conditions.
7) The TCO cannot be used as a current sensitive fuse.
1) Tests should be repeated for the fi nished equipment to confi rm that the TCO does operate as expected.
2) To improve thermal response of the TCO, put the main body of the TCO and the lead wires(terminals) as
alloy or lead wires, or damage to the main body may result.
1) TCO body and terminals must be properly fi xed when the TCO is mounted in the equipment. It may cause
2) When TCO is mounted in the equipment, terminals must be aligned with the body. If TCO body and terminals
When sealing the overall TCO with resin, determine the fi xing conditions by repeating the test using your fi nal
product to check whether or not the resin properties (e.g. expansion, contraction, and curing temperature)
affect the TCO and whether or not the TCO can operate normally.
or not the varnish or solvent used dissolved the coating of the TCO or caused damage, such as cracks, before
performing the treatment again.
1) In liquids such as water, oil, chemical and organic solvents
2) In direct sunlight, outdoors or in dusty atmospheres
3) In places where water condensation occurs
✽ Use in the following environments may affect the performance of the TCO; Verify performance and reliability
(1) In places full of corrosive gases such as sea breeze, Cl
(2) In environments with high static electricity and/or strong electromagnetic waves.
equip ment, etc.
1) Lead wires(terminals) are to be bent or cut at least 3 mm away from the TCO seals to avoid damaging the
2) The lead wires and terminals shall not be nicked, fractured or burned.
3) It is recommended that experimental assembly trials, should be done so that it can be verifi ed that manufacturing
4) Do not repeat bending terminals of thin type TCO.
• When the TCO is continuously used at the temperature close to the functioning temperature, the TCO may
• When the TCO is continuously used at the temperature higher than the maximum operation temperature, the
• When TCO is operated in an abnormal mode
Using the TCO under a higher temperature than the maximum operating temperature may cause premature
open ing or opening delay.
op er ate while being used.
TCO may be degraded and may not operate normally at the specifi ed temperature.
the rated current for 168 hours. The TCO can not be used over 168 hours exceeding the holding temperature.
the TCO operates.
TCO produces excessive heat, resulting in premature opening. The arc generated at this condition of operation
will result in an abnormality of appearance (crack on body) and insuffi cient insulation.
exceeded, it may not cut off the circuit .
excessive temperature change (such as outdoor) is repeated. Investigate the environment where TCO is used.
close to the heat source as possible and the place where the TCO is evenly heated.
If the temperatures transferred to the main body and to the lead wires(terminals) are largely different from
each other, improper operation can be expected, causing arcing and deterioration of insulation.
breaking of thermal element and/or terminals, or damages of the TCO body, or other failure when the body or
terminals is not properly connected. Avoid a transport under the condition with a connection only a single side
of terminal and the equipment as it might cause breaking of thermal element and/or terminals, or damages of
the TCO body, or other failure due to the vibration or mechanical stress on the transportation.
are mutually mounted askew, it might cause breaking of thermal element and/or terminals. Also after assembling
TCO in the equipment, avoid pulling, bending, pushing stress and twisting stress in the TCO body and terminals
in order not to cause breaking of thermal element and/or terminals, or damages of the TCO body.
be fore production use.
TCO . (axial / radial type) or body (thin type). The TCO seals (axial / radial type) shall not be grasped with
any tools or holders. Terminals of thin type TCO are to be grasped before they are bent . (See Fig.1)
The body and/or seals must not be damaged, burned or overheated.
procedures will not exceed the maximum tested "pull" and "push" forces of 20 N (MP series:5 N, MU series:10 N)
and 5 N respectively on the lead wires (terminals), or induce excessive twisting or the like.
– 386 –
while the rated voltage and/or the rated current being
2
, H
2
S, NH
3
, SO
2
and NO
2
Thermal Cutoffs (TCO)
00
Sep. 2010