Thermal Cutoffs (TCO)
Thermal Cutoffs (TCO)/
Thermal-links
EYP Series: N
Series: F
Series: E
Series: H
Series: MP
Series: MU
Features
● Small
and Insulation Type
TCO is compact and insulated, featuring quick temperature response, and mountable in a small space without
insulation or protection.
● High Reliability
TCO opens reliably when the equipment becomes abnormal, and is not resettable.
● Solid Structure
Uniquely formed lead provides reliable TCO connection and provides easy assembly handling. (Axial lead type only)
● Thin Type
Thick is less than 0.8 mm (MP series), available for spot welding (MP and MU series)
● Halogen-free (Thin type MP and MU series)
The thin type fuses with a part number listed in this catalog contain no halogen other than any that may exist as an impurity.
● RoHS compliant
Approved Safety Standards
● PS
E
● UL, C-UL
● CSA
● VDE
● BEAB
● CCC
(Japan)
: Approved by JET
(U.S.A.)
: E60271
(Canada) : 1□□□□□□ (LR67163)
(Germany) : 481106-1171-□□□□
(U.K.)
: C□□□□
(China)
: 20020102050042□□
See Ratings in details.
Recommended Applications
●
Transformers, Solenoids, Ventilation fans, Electric fans, Small electric motors, Driers, Gas home appliances, Fluorescent
lights, Electric shavers, Adaptors, Heating devices, ICs, Batteries, etc. The TCO can also be used for overheating protection.
Construction
● Axial
lead type (N, F and E series)
● Radial
lead type (H series)
Fusible alloy
(Pb·Cd free)
Sealant (Epoxy resin)
Special resin
(Flux)
Fusible alloy (Pb·Cd free)
Insulating case
(Ceramic)
Insulating
Special resin
case(Ceramic)
(Flux)
● Thin
Special formed
lead wire
(Tin plating copper)
Sealant
(Epoxy resin)
Lead wire
(Tin plating copper)
type (MP and MU series)
✽ Thin type is not to be soldered.
Special resin (Flux)
Insulating film
Fusible alloy (Pb·Cd free)
Terminal (Ni or Ni plating)
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
03
Jan. 2015
Thermal Cutoffs (TCO)
Ratings
●
N series
Part No.
Rated Functioning Electrical Rating Maximum Holding Maximum
Type No. of
✽2
✽4
Operating Temp. : Th
Functioning Temp.
Temp.
Approved
✽1
✽3
✽5
Temp.
Temp. : Tf
Limit : Tm
AC/
Volt.
Amp.
Standards
(°C)
(°C)
(°C)
(°C)
(°C)
DC (V)
(A)
EYP2BN082
N082
86
82±2
EYP2BN099
N099
102
98 –3
EYP2BN109
N109
114
110±3
EYP2BN110
N110
115
110 –2
EYP2BN127
N127
134
129±4
EYP2BN134
N134
139
135±3
EYP2BN143
N143
145
141±2
+4
+3
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
250
125
50
250
125
50
250
125
50
250
125
50
250
125
50
250
125
50
250
125
50
2
3
4
2
3
4
2
3
5
2
3
5
2
3
4
2
3
6
2
3
6
60
52
45
65
60
55
80
76
65
80
76
65
90
75
65
100
85
60
110
105
80
60
56
50
75
70
65
90
86
74
90
86
74
100
90
80
110
100
70
120
115
90
200
200
200
200
200
200
200
Approved Safety
Standards
PS
E
○
—
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—
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—
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—
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UL CSA VDE BEAB CCC
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—
—
Note: (1) For long lead types add the letter “L” at the end op the part number.
(2) The information of the Approved Safety Standards is furnished as of Jun. 2010.
Approved Safety Standards File No. UL:E60271, CSA:1687496(LR67163), VDE:481106-1171-0001, BEAB:C1144, CCC:2011010205464841
●
F series
Part No.
Rated Functioning Electrical Rating Maximum Holding Maximum
Type No. of
✽2
✽4
Functioning Temp.
Operating Temp. : Th
Temp.
Approved
✽1
✽3
✽5
Temp. : Tf
Temp.
Limit : Tm
AC/
Volt.
Amp.
Standards
(°C)
(°C)
(°C)
(°C)
(°C)
DC (V)
(A)
EYP1BF101
F101
102
EYP1BF115
F115
115
110 –2
EYP1BF134
F134
134
129 –3
EYP1BF138
F138
139
135±3
EYP1BF145
F145
145
141±2
98±3
+3
+4
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
250
125
50
250
125
50
250
125
50
250
125
50
250
125
50
1
2
3.5
1
2
4
1
2
4
1
2
5
1
2
5
65
60
55
80
76
70
90
85
65
100
90
65
110
110
80
75
70
65
90
90
80
105
100
80
110
105
70
125
125
95
200
200
200
200
200
Approved Safety
Standards
PS
E
○
—
—
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—
—
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—
—
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—
—
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—
—
UL
CSA VDE BEAB CCC
C-UL
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—
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—
—
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—
—
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—
—
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—
—
Note: (1) For long lead types add the letter “L” at the end op the part number.
(2) The information of the Approved Safety Standards is furnished as of Jun. 2010.
Approved Safety Standards File No. UL/C-UL:E60271, CSA:1709436(LR67163), VDE:481106-1171-0003, BEAB:C1133, CCC:2011010205464842
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
03
Jan. 2015
Thermal Cutoffs (TCO)
Ratings
●
E series
Part No.
Rated Functioning Electrical Rating Maximum Holding Maximum
Type No. of
✽2
✽4
Operating Temp. : Th
Functioning Temp.
Temp.
Approved
✽1
✽3
✽5
Temp.
Temp. : Tf
Limit : Tm
AC/
Volt.
Amp.
Standards
(°C)
(°C)
(°C)
(°C)
(°C)
DC (V)
(A)
EYP05BE101
E101
102
98±3
EYP05BE115
E115
115
110±2
EYP05BE134
E134
134
129 –3
EYP05BE138
E138
139
135±3
EYP05BE145
E145
145
141±2
+4
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
250
125
50
250
125
50
250
125
50
250
125
50
250
125
50
0.5
1.5
3
0.5
1.5
3
0.5
1.5
3
0.5
1.5
4
0.5
1.5
5
65
60
55
80
76
70
90
85
70
100
95
65
110
105
80
75
70
65
95
93
84
105
100
85
115
110
80
125
125
95
200
200
200
200
200
Approved Safety
Standards
PS
E
○
—
—
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—
—
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—
—
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—
—
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—
—
UL
CSA VDE BEAB CCC
C-UL
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—
—
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—
—
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—
—
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—
—
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—
—
Note: (1) For long lead types add the letter “L” at the end op the part number.
(2) The information of the Approved Safety Standards is furnished as of Jun. 2010.
Approved Safety Standards File No. UL/C-UL:E60271, CSA:1709439(LR67163), VDE:481106-1171-0002, BEAB:C1139, CCC:2011010205464843
●
H series
Part No.
Rated Functioning Electrical Rating Maximum Holding Maximum
Type No. of
✽2
✽4
Operating Temp. : Th
Functioning Temp.
Temp.
Approved
✽1
✽3
✽5
Temp.
Temp. : Tf
Limit : Tm
AC/
Volt.
Amp.
Standards
(°C)
(°C)
(°C)
(°C)
(°C)
DC (V)
(A)
EYP2BH101
H101
102
98±3
EYP2BH115
H115
115
110±2
EYP2BH134
H134
134
129 –3
EYP2BH138
H138
139
135±3
EYP2BH145
H145
145
141±2
+4
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
AC
AC
DC
250
125
50
250
125
50
250
125
50
250
125
50
250
125
50
2
3
3.5
2
3
3.5
2
3
3.5
2
3
3.5
2
3
4.5
65
60
55
80
76
74
90
70
65
100
80
75
110
100
85
75
70
65
90
86
84
95
85
80
105
95
90
125
115
100
200
200
200
200
200
Approved Safety
Standards
PS
E
○
—
—
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—
—
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—
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—
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—
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UL
CSA VDE BEAB CCC
C-UL
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—
—
Note: (1) The information of the Approved Safety Standards is furnished as of Jun. 2010.
Approved Safety Standards File No. UL/C-UL:E60271, CSA:1709435(LR67163), VDE:481106-1171-0004, BEAB:C1140, CCC:2011010205464844
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
03
Jan. 2015
Thermal Cutoffs (TCO)
Ratings
●
MP series
Part No.
Rated
Functioning
Functioning
✽2
Temp.
✽1
Temp. : Tf
(°C)
(°C)
Electrical Rating
AC/
DC
Volt.
(V)
Amp.
(A)
Maximum
Maximum
Holding
Operating
Temp.
✽4
Temp. : Th
✽3
✽5
Temp.
Limit : Tm
(°C)
(°C)
(°C)
Approved
Safety
Standards
UL
EYP2MP092AFT
92
88 –4
+3
DC
32
2
55
60
135
○
EYP2MP098AFT
98
94 –2.5
+3
DC
32
2
60
65
135
○
Note: (1) The information of the Approved Safety Standards is furnished as of Jun. 2010.
Approved Safety Standards File No. UL:E60271
●
MU series
Part No.
EYP4MU092GFD
Rated
Functioning
Functioning
✽2
Temp.
✽1
Temp. : Tf
(°C)
(°C)
92
89
+3
–4
Electrical Rating
AC/
DC
Volt.
(V)
Amp.
(A)
DC
32
4
Maximum
Maximum
Holding
Operating
Temp.
✽4
Temp. : Th
✽3
✽5
Temp.
Limit : Tm
(°C)
(°C)
(°C)
55
55
Approved
Safety
Standards
135
UL
○
Note: (1) The information of the Approved Safety Standards is furnished as of Jun. 2010.
Approved Safety Standards File No. UL:E60271
✽1 Rated Functioning Temperature (Tf)
The temperature at which a TCO changes its state of conductivity to open circuit with loading detection current only.
PS
E
Tolerance;
; ±7 °C
UL,CSA,VDE, BEAB, CCC; –100 °C
✽2 Functioning Temperature (Fusing-off temperature)
The functioning temperature at which a TCO changes its state of conductivity to open circuit in the ambient air oven which increases
temperature by 1 °C per minute and with loading the detective current 0.1 A or less.
✽3 Maximum Operating Temperature
The maximum temperature at which a TCO can be maintained while conducting rated current for 1000 h.
For details please refer to specification.
✽4 Holding Temperature (Th)
The maximum temperature at which a TCO can be maintained while conducting rated current for 168 h which will not cause a change in state
of conductivity to open circuit.
✽5 Maximum Temperature Limit (Tm)
The maximum temperature at which a TCO can maintains its mechanical and electrical properties with out closing again for 10
minutes after a TCO has changed its state of conductivity.
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
03
Jan. 2015
Thermal Cutoffs (TCO)
Dimensions in mm (not to scale)
●
Axial lead type
Radial lead type
fd
fD
●
L
l
fD1
l
L
Dimensions (mm)
L
0D
0D1
0d
k
N Series 9.0±1.0 2.5±0.2 3 max. 38±3 (✽78±3) 0.60±0.05
+0.20
F Series 6.0±1.0 1.85 –0.15 2.2 max. 38±3 (✽68±3) 0.53±0.02
E Series 5.0±0.5 1.5±0.1 1.8 max. 38±3 (✽68±3) 0.53±0.02
H Series
fd
C
A
B
A
5.0±0.5
Dimensions (mm)
B
C
L
4.0±0.5 2.2±0.3
55±3
0d
0.53±0.02
(✽) For long lead types add the letter “L” at the end op the part number.
●
Thin type
EYP2MP◻◻◻AFT
EYP4MU◻◻◻GFD
A
A
E
G
D
(H)
A
24.5±0.5
26.5±0.5
N
(G)
C
J
EYP2MP◻◻◻AFT
EYP4MU◻◻◻GFD
B
B
2.7±0.2
4.5±0.4
C
0.64±0.15
1.00±0.15
D
B
(H)
C
J
Dimensions (mm)
D
E
G
4.2±0.5
2.3±0.2
7.9±0.5
10.5±0.5
3.0±0.2
(8.0)
E
(H)
(12.4)
(8.0)
J
0.10±0.02
0.15±0.02
N
–
1.8±0.5
Marking
The following items are indicated on TCO.
• N, F, E, H Series : Type No., Date Code, Trade Mark, E Mark, JET, Rated Functioning Temperature, Rated Current
• MP, MU Series : Type No., Date Code, Trade Mark
Packaging Methods
Part No.
Standard Quantity
Style
Mass (Weight) [mg/pc.]
EYP2BN◻◻◻
2,000 pcs./Box
340
EYP2BN◻◻◻L
2,000 pcs./Box
510
EYP1BF◻◻◻
3,000 pcs./Box
220
EYP1BF◻◻◻L
4,000 pcs./Box
330
EYP05BE◻◻◻
4,000 pcs./Box
EYP05BE◻◻◻L
5,000 pcs./Box
320
EYP2BH◻◻◻
1,500 pcs./Box
350
EYP2MP◻◻◻AFT
2,000 pcs./Box
54
EYP4MU◻◻◻GFD
1,000 pcs./Box
130
Bulk
210
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
03
Jan. 2015
Thermal Cutoffs (TCO)
Safety Precautions (Handling Precautions)
The following are precautions for individual products. Please also refer to the common precautions for fuses in this
catalog.
● Design Applications
1. Use the TCO within their specified temperature and electrical ratings.
1) Use the TCO under the maximum operating temperature specified in the individual specification.
Using the TCO under a higher temperature than the maximum operating temperature may cause premature
opening or opening delay.
• When the TCO is continuously used at the temperature close to the functioning temperature, the TCO may
operate while being used.
• When the TCO is continuously used at the temperature higher than the maximum operation temperature, the
TCO may be degraded and may not operate normally at the specified temperature.
2) The holding temperature is defined as the highest temperature at which the TCO is activated continuously at
the rated current for 168 hours. The TCO can not be used over 168 hours exceeding the holding temperature.
3) Equipment should be designed so that its over shoot does not exceed the maximum temperature limit after the
TCO operates.
4) If the TCO is activated by voltage higher than the rated voltage or current higher than the rated current, the
TCO produces excessive heat, resulting in premature opening. The arc generated in such operating conditions
will result in abnormal appearance (crack on body) and insufficient insulation.
• When TCO is operated in an abnormal mode while the rated voltage and/or the rated current being exceeded,
it may not cut off the circuit.
5) Thermal element may be transformed and TCO may open when it is used in the environment from which an
excessive temperature change (such as outdoor) is repeated. Investigate the environment where TCO is used.
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.
2. To fully use the function of the TCO, a suitable TCO for each equipment application must be selected.
1) Tests should be repeated for the finished equipment to confirm 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 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, defective operation may occur, causing arcing and deterioration of insulation.
3. Avoid application of excessive vibration and mechanical stress to the TCO. Otherwise, failure of the fusible alloy
or lead wires, or damage to the main body may occur.
4. The following 1) and 2) are precautions for thin type TCO (MP and MU series)
1) TCO body and terminals must be properly fixed when the TCO is mounted in the equipment. It may cause
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.
2) When TCO is mounted in the equipment, terminals must be aligned with the body. If TCO body and
terminals 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.
5. When sealing the TCO with resin, select a resin that does not corrode the seals or the lead wires(terminals).
When sealing the overall TCO with resin, determine the fixing conditions by repeating the test using your final
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.
6. When immersing equipment with a TCO in varnish or solvent and then drying it, repeat the test to check whether
or not the varnish or solvent used dissolved the coating of the TCO or caused damage, such as cracks, before
performing the treatment again.
7. Do not use under the following environments.
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
before production use.
(1) In places full of corrosive gases such as sea breeze, Cl2, H2S, NH3, SO2 and NO2
(2) In environments with high static electricity and/or strong electromagnetic waves.
8. Do not use the TCO in aerospace equipment, atomic energy equipment, military weapons, life saving equipment,
automobile, etc.
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
03
Jan. 2015
Thermal Cutoffs (TCO)
● Instruction
1. Forming and Cutting
1) Lead wires(terminals) are to be bent or cut at least 3 mm away from the TCO seals to avoid damaging the
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)
2) The lead wires and terminals shall not be nicked, fractured or burned.
The body and/or seals must not be damaged, burned or overheated.
3) It is recommended that experimental assembly trials, should be done so that it can be verified that manufacturing
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.
4) Do not repeat bending terminals of thin type TCO.
Bending
> 3 mm
grasped
> 3 mm
Cutting
> 3 mm
> 3 mm
grasped
> 3 mm
> 3 mm
Fig-1
2. Soldering, Welding, Calking
1) Lead wires are to be soldered with the standard conditions shown in Table 1.
Excessive soldering heat and soldering time may cause damage to a TCO.
If higher temperature, longer time or shorter lead length exist rather than the conditions of Table 1, it is
recommended to run tests for finding the soldering conditions that do not damage the TCO. Also, use of
tools such as pliers are recommended to dissipate the soldering heat by grasping lead wires between the
TCO body and soldering point.
2) Avoid preheating and gradual cooling as much as possible. However if preheating and gradual cooling is
done, set the process conditions after confirming that the TCO is not affected by these procedures.
3) Do not use reflow soldering.
4) Thin type (MP and MU series) is not to be soldered.
5) If water or solvent is used for cleaning flux after soldering, check and confirm the reliability of the agent.
6) Lead wires are to be clamped at least 3 mm away from the seals.
Improper connections may cause damage to the seals or other parts and may result in nuisance tripping of
the devices due to the generation of excessive heat at a faulty high resistance junction.
7) Set the conditions for welding and calking only after checking contact resistance and connection strength.
8) When resoldering or rewelding, cool the TCO under room conditions.
9) When the TCO is heated by soldering or welding, be careful not to pull, push or twist the TCO lead wires.
Table-1 Soldering Conditions
Temperature of Soldering: 300 °C Time: 3 s
Lead Length (k)
Type No.
30 mm
F101
E101
H101
25 mm
N082, N099
E115, E134, E138 H115, H134, H138
F115, F134,
20 mm
N109, N110
E145
H145
F138, F145
N127, N134, N143
15 mm
● Soldering point
l
l
3. Sufficiently flexible, appropriate free length and proper size wire should be used for splice connection. Connection
including connectors used for splicing shall be of the low resistance type, and they shall be made mechanically
secure.
4. Where the lead wires of the TCO is tied with string, put them at least 10 mm apart from the seals of the main
body of the TCO.
5. Quality control notes
1) Measurement of resistance between lead wires (terminals) and checking of the internal status with X-rays are
effective means to confirm the status of the TCO on delivery and after mounting in the equipment.
6. Storage method
1) Store the TCO in packing cases or in polyethylene bags within the temperature range -10 °C to +40 °C and
RH of 30 % to 75 %. Store them at a location where no rapid changes of temperature or humidity or no
direct sunlight is applied. The location must also be free from vibration and shock .
2) Avoid storage in places containing corrosive gases such as sea breeze, Cl2, H2S, NH3, SO2 and NO2.
3) The period of guarantee for performance such as solderability is for one year after our delivery; and this
condition applies only where the storage method specified in above has been followed.
7. Do not repair a TCO. Replace it with a new part.
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
03
Jan. 2015