Spec. No.:
Date:

LTC−K−HTS−0001
2023. 1. 23/9

Data sheet
Title:

LINEARPOSITIVE
RECTANGULAR TYPE

Style:

LTC1/10,1/8

T-C

CHIP

THERMISTORS;RoHS COMPLIANCE ITEM
Halogen and Antimony Free
Note: ・Stock conditions
Temperature: +5C  +35C
Relative humidity: 25%  75%R.H.
The period of guarantee: Within 2 year from shipment by the company.

・Product specification contained in this data sheet are subject to change at any
time without notice・If you have any questions or a Purchasing Specification for any quality
agreement is necessary, please contact our sales staff.

Hokkaido Research Center
Approval by: T. Sannomiya
Drawing by: M. Shibuya

Title:Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8

LTC−K−HTS−0001
Page:

/9
1/10

1. Scope
1.1 This specification covers the detail requirements for linear positive T−C chip thermistors; rectangular type, style of
LTC1/10,1/8.
12 Applicable documents
JIS C 5201−1: 2011, JIS C 5201−8: 2014, JIS C 5201−8−1: 2014
IEC60115−1: 2008, IEC60115−8: 2009, IEC60115−8−1: 2014
EIAJ RC−2134C−2010

2. Classification
Type designation shall be the following form.
(Example)
LTC
1/10
152
J
B
10
1
2
3
4
5
6
Style
1 Linear positive T−C chip thermistors; rectangular type2 Rated dissipation andor dimension
3 Temperature coefficient of resistance
10±100010−6/ °C
4 Rated resistance152
E24 Series, 3 digit, Ex. 152--> 1.5k
5 Tolerance on rated resistanceJ5%
6 Packaging form
B
Bulk (loose package)
TP
Paper taping

Style

3. Rating
3.1 The ratings shall be in accordance with Table−1.
Style
LTC1/10
LTC1/8Rated dissipation (W)
0.1
0.125

Table−1
Insulation voltage (V)Category temperature range (℃)

100−40+125

Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23

Title:Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8

LTC−K−HTS−0001
Page:

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2/10

3.2 Temperature coefficient of resistance and rated resistance .
3.2.1 The combination of temperature coefficient of resistance and rated resistance shall be in accordance with Table−2.
Table−2
Rated resistance
Temperature coefficient of resistanceResistance range
Nominal value
Tolerance
SymbolTolerance(10−6/℃)
LTC1/10
LTC1/81005.1k
1005.1k
1005.1k
1003.3k
1003.3k
1001.6k
1003.3k
1003.3k
1003.3k
51910
515603336033220

10010k
10010k
10010k
1004.7k
1004.7k
1002.2k
1003.6k
1003.6k
1003.6k
511.2k
51910
33470
33180

J(5%)

05
08
10
15
20
24
28
30
33
36
39
42
45

10010−6/℃
15010−6/℃

500
800
1000
1500
2000
2400
2800
3000
3300
3600
3900
4200
4500

15％

10％

3.2.2 The symbol of the temperature coefficient of resistance
The symbol of the temperature coefficient of resistance shall be in accordance with Table-2.
Example) 0550010−6C
10100010−6C
3.2.3 Symbols for rated resistance
The symbol of the rated resistance shall be combined one English capital letter and one digit in accordance with Table−3
and Table−4.
Table−3
Code
A
B
C
D
E
F
G
H
J
K
L
M
Value
1.0 1.1 1.2 1.3 1.5 1.6 1.8 2.0 2.2 2.4 2.7 3.0
Code
Value

3.3 Climatic category
40/125/56

N
3.3

P
3.6

Q
3.9

R
4.3

S
T
4.7 5.1
Table−4Code01
Multiplier
10０ 10１
Example) A11.0101=10
E31.5103=1.5k

U
5.6

V
6.2

W
6.8

2
10２

3
10３

4
10４

Lower category temperature
Upper category temperature
Duration of the damp heat, steady state test

X
7.5

Y
8.2

Z
9.1

−40 °C+125 °C
56days

3.4 Stability class5%
Limits for change of resistance:−for long - term tests±(5%+0.1)−for short - term tests±(1%+0.05)Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23

Title:Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8

LTC−K−HTS−0001
Page:

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3/10

3.5 Derating
The derated values of dissipation at temperature in excess of 70 °C shall be as indicated by the following curve.
100
Percentageof the rated

Area of recommended
operation

dissipation
(%)
0
−40

70
125
Ambient temperature (°C)

Figure−1Derating curve
3.6 Rated voltage
d. c. or a. c. r. m. s. voltage calculated from the square root of the product of the rated resistance and the rated dissipation.
E : Rated voltage (V)
E =
P · R
P : Rated dissipation (W)R : Rated resistance ()4. Packaging form
The standard packaging form shall be in accordance with Table−5.
Table−5
SymbolB
TP

Standard packaging
quantity / units
1,000 pcs.
5,000 pcs.

Packaging form
Bulk (loose package)
Paper taping
8mm width, 4mm pitches

5. Dimensions
5.1 The resistor shall be of the design and physical dimensions in accordance with Figure−2 and Table−6.

W

L

c

d

d

H

c

Figure−2
Table −6
Style

L

W

H

c

Unit : mmd

LTC1/102.0  0.15

+0.10
1.25 −0.05

0.6  0.1

0.4  0.2

+0.2
0.3 −0.1

LTC1/8

3.1  0.1

1.55  0.10

0.6  0.1

0.45  0.20

+0.2
0.3 −0.1

Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23

Title:Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8

LTC−K−HTS−0001
Page:

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5.2 Net weight (Reference)
Style
Net weight(mg)LTC1/105

LTC1/89

6. Marking
The combination symbol of nominal resistance value and temperature coefficient of resistance shall be marked on over coatside as shown in following examples.
(Example) 10Ｅ31,00010−6/C1.5k
10Ｋ23,90010−6/C240
7. Performance
7.1 The standard condition for tests shall be in accordance with Sub−clause 4. 2, JIS C 5201−1: 2011.
7.2 The performance shall be satisfied in Table−7.
Table−7(1)No. Test items
Condition of test (JIS C 5201 - 1)
Performance requirements
1
Visual examination
As in 4. 4. 1
Sub−clause 4. 4. 1
The marking shall be legible, as
Checked by visual examination.
checked by visual examination.
2
Dimension
Sub−clause 4. 4. 2
As specified in Table−6 of thisspecification.
Resistance
As in 4. 5. 2Sub−clause 4. 5
The resistance value shallcorrespond with the rated
resistance taking into account the
specified tolerance.
3
Voltage proof
No breakdown or flash overSub−clause 4. 7
Method: 4. 6. 1. 4(See Figure−5)
Test voltage: Alternating voltage with a peakvalue of 1.42 times the insulation voltage.
Duration: 60 s ± 5 s
R1G
Insulation resistance
Test voltage : Insulation voltage
Duration: 1 min.
4
Solderability
As in 4. 17. 4. 5Sub−clause 4. 17
The terminations shall be covered
Without ageing
Flux: The thermistors shall be immersed in a with a smooth and bright solder
coating.
non – activated soldering flux for 2s.
Bath temperature: 235 °C ± 5 °C
Immersion time: 2 s ± 0.5 s

Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23

Title:

No
5

6

7

Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8
Table−7(2)Condition of test (JIS C 5201 - 1)
Sub−clause 4. 31
Substrate material: Epoxide woven glass
Test substrate: Figure−3
Overload
Sub−clause 4. 13(in the mounted state)
The applied voltage shall be 2.5 times the
rated voltage.
Duration: 2 s
Visual examination
Resistance
Solvent resistance of the marking Sub−clause 4. 30
Solvent : 2 - propanol
Solvent temperature: 23 °C ± 5 °C
Method 1
Rubbing material: cotton wool
Without recovery
Mounting
Sub−clause 4. 31
Substrate material: Epoxide woven glass
Test substrate: Figure−4
Bound strength of the end face Sub−clause 4. 33
plating
Bent value: 3 mm
Resistance
Final measurements
Sub−clause 4. 33. 6
Visual examination
Resistance to soldering heat
Sub−clause 4. 18
Solder temperature: 260 °C ± 5 °C
Immersion time: 10 s ± 0. 5 s
Visual examination
Test items
Mounting

Component solvent resistanceResistanceSub−clause 4.29
Solvent: 2−propanol
Solvent temperature: 23 °C ± 5 °C
Method 2
Recovery: 48 h
Visual examination
Resistance

LTC−K−HTS−0001
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Performance requirements

No visible damage R  ± (1%+0.05)Legible markingR  ± (1%+0.05)No visible damage

As in 4. 18. 3. 4
No sign of damage such as
cracks.
R  ± (1%+0.05 )No visible damage
R  ± (1%+0.05)Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23

Title:No
8

Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8

Test items
Mounting

Adhesion

Rapid change temperature

9

Climatic sequence−Dry heat−Damp heat, cycle(12+12hour cycle)
First cycle−Cold−Damp heat, cycle(12+12hour cycle)
Remaining cycle−D.C. load

10

Mounting

Endurance at 70 °C

Table−7(3)Condition of test (JIS C 5201 - 1)
Sub−clause 4. 31
Substrate material: Epoxide woven glass
Test substrate: Figure−3
Sub−clause 4. 32
Force: 5 N
Duration: 10 s ± 1 s
Visual examination
Sub−clause 4.19
Lower category temperature:−40 °C
Upper category temperature:+85 °C
Duration of exposure at each temperature: 30
min.
Number of cycles: 5 cycles.
Visual examination
ResistanceSub−clause 4. 23
Sub−clause 4. 23. 2
Test temperature: +125 °C
Duration: 16 h
Sub−clause 4. 23. 3
Test method: 2
Test temperature: 55 °C[Severity(2)]Sub−clause 4. 23. 4
Test temperature −40 °C
Duration: 2h
Sub−clause 4. 23. 6
Test method: 2
Test temperature: 55 °C[Severity (2)]
Number of cycles: 5 cycles
Sub−clause 4. 23. 7
The applied voltage shall be the rated voltage
Duration: 1 min.
Visual examination
ResistanceSub−clause 4. 31
Substrate material: Epoxide woven glass
Test substrate: Figure - 3

LTC−K−HTS−0001
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Performance requirements

No visible damage

No visible damage
R  ±(1%+0.05)No visible damage
R  ± (5%+0.1)Sub−clause 4. 25. 1
Ambient temperature: 70 °C ± 2 °C
Duration: 1000 h
The voltage shall be applied in cycles of 1.5 h
on and 0.5 h.
The applied voltage shall be the rated voltage
Examination at 48 h , 500 h and1000 h:No visible damage
Visual examination
R  ± (5%+0.1)Resistance

Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23

Title:Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8

No
11

Test items
Mounting

12

Variation oftemperature
Mounting

Table−7(4)Condition of test (JIS C 5201−1)
Sub - clause 4. 31
Substrate material: Epoxide woven glass
Test substrate: Figure−3
resistance

Damp heat, steady state

13

Dimensions (detail)
Mountingwith Sub−clause 4. 8
+20 °C / + 75°C
Sub−clause 4. 31
Substrate material: Epoxide woven glass
Test substrate: Figure−3
Sub−clause 4. 24
Ambient temperature: 40 °C ± 2 °C
Relative humidity : 93 +2-3 %Without voltage applied.
Without polarizing voltage[4. 24. 2. 1, c)]
Visual examination
ResistanceSub−clause 4. 4. 3

LTC−K−HTS−0001
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Performance requirements

As in Table−2

No visible damage
Legible markingR  ± (5%+0.1)As in Table−6

Sub−clause 4. 31
Substrate material: Epoxide woven glass
Test substrate: Figure−3

Endurance at upper category Sub−clause 4. 25. 3
temperature
Ambient temperature:125 °C ± 2 °C
Duration: 1000 h
Examination at 48 h, 500 h and1000 h:Visual examination
ResistanceNo visible damage
R  ± (5%+0.1)Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23

Title:Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8

8. Test substratec

Soldering land

LTC−K−HTS−0001
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3.5 3

Unit: mm
Copper clad

7.5

5.5

b

25

d

a

Solder resist

5.08 5.08

2.5

Style
LTC1/10
LTC1/8

3
58.5

a
1.2
2.1

b
4.0
3.9

c
1.5
1.7

d
4.3
3.4

c
1.65
2.0

d
3.0
2.5

TEST SUBSTRATE
Figure−3Remark 1). Material: Epoxide woven glass
Thickness: 1. 6mm Thickness of copper clad: 0. 035mm
2). In the case of connection by connector, the connecting terminals are gold plated.
However, the plating is not necessary when the connection is made by soldering.

Unit: mmd

1

Copper clad

4.5

40

d

c

a

Style
LTC1/10
LTC1/8b70

Solder resist

Soldering land

100

a
1.2
2.5

b
4.0
5.0

Remark 1). Material: Epoxide woven glass
Thickness: 1. 6mm Thickness of copper clad: 0. 035mm
Figure−4 LTC BOUND STRENGTH OF THE END FACE PLATING TEST SUBSTRATE

Insulation plate

Metal block measurement
Point A

Metal plate.

R0.5mmMeasurement
point B
Insulation surface

Component

Pressure byspring (10.2N)

Figure−5
Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23

Title:Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8

LTC−K−HTS−0001
Page:

/9
9/10

9. Taping
9.1 Applicable documents JIS C 0806−3: 2014, EIAJ ET−7200C: 2010
9.2 Taping dimensions
Taping dimensions shall be in accordance with Figure−6 and Table−8.
Unit: mmt1

40.1

1.5 +0.1
0Sprocket hole20.051.750.1

B

80.2

A

t2

Carrier cavity

40.1

3.50.05
Direction of unreeling

Style
LTC1/10
LTC1/8Figure−6
Table−8AB
1.65  0.15
2.5  0.2
2.0  0.15
3.6  0.2

t1

Unit: mmt2

0.8  0.1

1.0max.

±±±1). The cover tapes shall not cover the sprocket holes.
2). Tapes in adjacent layers shall not stick together in the packing.
3). Components shall not stick to the carrier tape or to the cover tape.
4). Pitch tolerance over any 10 pitches ±0.2mm.
5). The peel strength of the top cover tape shall be with in 0.1N to 0.5N on the test method as shown in the following Figure−7.
6). When the tape is bent with the minimum radius for 25 mm, the tape shall not be damaged and the components shallmaintain their position and orientation in the tape.
7). In no case shall there be two or more consecutive components missing.
The maximum number of missing components shall be one or 0. 1%, whichever is greater..
8). The thermistors shall be faced to upward at the over coating side in the carrier cavity.
Top cover tape
Carrier tapePeel−off(About 300mmmin)
165to180
Direction of unreeling

Figure−7

Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23

Drawing No:
LINEAR POSITIVE T−C CHIP THERMISTORS; RECTANGULAR TYPE
LTC1/10,1/8

Title:LTC−K−HTS−0001

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Page:

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9.3 Reel dimension
Reel dimensions shall be in accordance with the following Figure−8 and Table−9.
Plastic reel (Based on EIAJ ET−7200C)
Unit: mm

0

+1
60 0

130.220.5

180 −1.5

Marking A

210.8

Marking B

A

B

Figure−8
Table−9Unit: mm
A
B
Note
Style
11.4±1.0
Injection molding
LTC1/10,1/8
9 +1.0013±1.0Vacuum forming
Note Marking label shall be marked on a place of Marking A or two place of marking A and B.
9.4 Leader and trailer tape.
400mm min
100mm min

160mm min
End

Start
Trailer

LeaderDirection of unreeling

Figure−9
10. Marking on package
The label of a minimum package shall be legibly marked with follows.
10.1 Marking A(1) Classification(Style, Temperature coefficient of resistance, Rated resistance, Tolerance on rated resistance, Packaging form)(2) Quantity (3) Lot number (4) Manufacturer’s name or trade mark10.2 Marking B(KAMAYA Control label)(5) Others

Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.23