No.:
Date:

TWLC−K−HTS-0001
2023. 1. 20/4

Data sheet
Title:FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDETERMINATION - LOW OHM

Style:

TWLC32,50,63

RoHS COMPLIANCE ITEM
Halogen and Antimony Free
Note: ・Stock conditions
Temperature: +5°C ∼ +35°C
Relative humidity: 25% ∼ 75%
The period of guarantee: Within 2 year from shipmen t by the company.
Solderability shall be satisfied.

・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:

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 1/11

1. Scope
1.1 This data sheet covers the detail requirements for fixed chip resistors; rectangular type & wide termination - low ohm, styleof TWLC32, 50, 63.
1.2 Applicable documents
JIS C 5201−1: 2011S C 5201−8: 2014, JIS C 5201−8−1: 2014
IEC60115−1: 2008, IEC60115−8: 2014, IEC60115−8−1: 2014
EIAJ RC−2134C−2010

2. Classification
Type designation shall be the following form.
(Example)

TWLC
50
R470
J
TE
1
2
3
4
5
6
Style
1 Fixed thick film chip resistors; rectangular type and low ohm
2 Size3 Temperature coefficient of resistance−(Dash) Standard

Style

4 Rated resistance Rated resistance and symbol shall be in accordance with Sub-clause 3.3.
R470 4 digit, Ex. R470--> 470mΩ,
5 Tolerance on rated resistance
F
±1%
J
±5%
6 Packaging form
B
Bulk (loose package)
TP
Paper taping
TE
Embossed taping

3. Rating
3.1 The ratings shall be in accordance with Table−1.
Table−1
Style

Rated
dissipation
(W)

Rated
current
range (A)Temperature coefficient ofresistance (10–6/ °C)

TWLC321.0

1.04∼3.16−(Dash)TWLC501.0

1.04∼3.16−(Dash)TWＬC632.0

1.48∼4.47−(Dash)Style
TWLC32
TWLC50
TWLC63

Limiting element
voltage(V)
0.95
0.95
1.34

Rated resistance
range(Ω)

0~+2000~+2500~+3500~+2000~+3500~+2000~+3500.5∼0.91
0.2∼0.47
0.1∼0.18
0.2∼0.91
0.1∼0.18
0.2∼0.91
0.1∼0.18

Insulation voltage(V)

Category temperature
range (°C)

500−55∼+155

Tolerance on rated resistanceF(±1%), J(±5%)
F(±1%), J(±5%)
F(±1%), J(±5%)

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.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.20

Title:

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 2/11

3.2 Rated resistance
The rated resistance shall be in accordance with Table−2
Table−2
Rated resistance
Rated resistance
SymbolSymbolRated resistance [mΩ]Rated resistance [mΩ]
100
R100
400
R400
110
R110
430
R430
120
R120
470
R470
130
R130
500
R500
150
R150
510
R510
160
R160
560
R560
180
R180
600
R600
200
R200
620
R620
220
R220
650
R650
240
R240
680
R680
250
R250
700
R700
270
R270
750
R750
300
R300
800
R800
330
R330
820
R820
360
R360
900
R900
390
R390
910
R910
3.3 Climatic category
55/155/56

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

3.4 Stability class
5%−55 °C+155 °C
56daysLimits for change of resistance:−for long−term tests±5%−for short−term tests±1%

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
dissipation(%)

Area of recommended
operation
0
−55

70

155

Ambient temperature (°C)

Figure−1 Derating curve

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.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.20

Title:

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 3/11

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 (Ω)
Limiting element voltage can only be applied to resistors when the resistance value is equal to or higher than the criticalresistance value.
At high value of resistance, the rated voltage may not be applicable.
3.7 Rated current
The rated current calculated from the square root of the quotient of the rated resistance and the rated dissipation.
I: Rated current (A)
I =
P / R
P: Rated dissipation (W)R: Rated resistance (Ω)
The rated current shall be corresponding to rated voltage.
4. Packaging form
The standard packaging form shall be in accordance with Table−3.
Table−3
Symbol

Packaging form

B
TP
TE

Bulk (loose package)
Paper taping
8mm width, 4mm pitches
Embossed taping
12mm width, 4mm pitches

Standard packaging
quantity / units
1,000 pcs.
5,000 pcs.
4,000 pcs.

Application
TWLC32,50,63
TWLC32
TWLC50,63

5. Dimensions
5.1 The resistor shall be of the design and physical dimensions in accordance with Figure−2 and Table−4.

d

H

c

L

d

c

W

Figure−2
Table−4
Style
TWLC32
TWLC50
TWLC63L
1.6±0.2
2.5±0.15
3.2±0.2W
3.2±0.2
5.0±0.2
6.3±0.2H
0.55±0.10
0.55±0.10
0.6±0.1c
0.5±0.25
0.6±0.2
0.6±0.2

Unit: mmd
0.5±0.25
0.6±0.2
0.6±0.2

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.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.20

Title:

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 4/11

6. Marking
The rated resistance shall be marked in 4 characters consisting of 3 figures or 3 figures and a letter and marked on over coatside.
(Example) “R100” → 0.1 [Ω]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−5.
Table− 5(1)Performance requirements
No.
Test items
Condition of test (JIS C 5201−1)
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
As specified in Table−4 of thisSub−clause 4.4.2
specification.
Resistance
As in 4.5.2
Sub−clause 4.5
The resistance value shall correspondMeasurement current: 10(mA)
Note:
The
measuringapparatus with the rated resistance taking into
corresponding to Digital multimeter of account the specified tolerance.
TR6878 for Advantest Corp..
3
Voltage proof
Sub−clause 4.7
No breakdown or flash over
Method: 4.6.1.4
Test voltage: Alternating voltage with a peakvalue of 1.42 times the insulation voltage.
Duration: 60 s±5 s
Insulation resistanceR ≥ 1 GΩ
Test voltage: Insulation voltage
Duration: 1 min.
4
Solderability
As in 4.17.4.5
Sub−clause 4.17
The terminations shall be covered with
Without aging
Flux: The resistors shall be immersed in a a smooth and bright solder coating.
non−activated soldering flux for 2 s.
Bath temperature: 245 °C±5 °C
Immersion time: 2 s±0.5 s
5Mounting
Sub−clause 4.31
Substrate material: Epoxide woven glass
Overload
Sub−clause 4.13
(in the mounted state)
The applied voltage shall be 2.5 times the
rated voltage or the current corresponding to.
Duration: 2 s
No visible damage
Visual examination∆R ≤ ±1%
Resistance
Solvent resistance of the Sub−clause 4.30
Legible marking
marking
Solvent: 2−propanol
Solvent temperature: 23 °C±5 °C
Method 1
Rubbing material: cotton wool
Without recovery

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.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.20

Title:No
6

7

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 5/11
Table−5(2)Condition of test (JIS C 5201−1)
Sub−clause 4.31
Substrate material: Epoxide woven glass
Bound strength of the end Sub−clause 4.33
face plating
Bent value: TWLC32: 3mm
TWLC50,63: 1 mm
Final measurements
ResistanceSub−clause 4.33.6
Visual examination
Resistance to soldering heat Sub−clause 4.18 (JEITA RC-2144 2.3.2)
T1:Pre-heat minimum temp.:150±5 °C
T2:Pre-heat maximum temp.:180±5 °C
T3:Soldering temp.:220 °C
T4:Peak temp.:250 °C
t1:Pre-heat duration:120±5 s
t2:Soldering duration:60 to 90 s
t3:Peak duration(T4-5°C):20 to 40 s
Pre-reflow soldering: 1 time
(Initial measurements)
Reflow soldering: 3 times
Test items
Mounting

Performance requirements∆R ≤ ±1%
No visible damage

t3
T4
T3

t2

T2
T1

Component
resistance

t1

Visual examination
solvent ResistanceSub−clause 4.29
Solvent: 2−propanol
Solvent temperature: 23 °C±5 °C
Method 2
Recovery: 48 h
Visual examination
ResistanceNo visible damage∆R ≤ ±1%

No visible damage∆R ≤ ±1%

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.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.20

Title:No
8

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 6/11

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−5(3)Condition of test (JIS C 5201−1)
Sub−clause 4.31
Substrate material: Epoxide woven glass
Sub−clause 4.32
Force: 5 N
Duration: 10 s±1 s
Visual examination
Sub−clause 4.19
Lower category temperature:−55 °C
Upper category temperature:+155 °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: +155 °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 −55 °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 current shall be the rated current.
Duration: 1 min.
Visual examination
ResistanceSub−clause 4.31
Substrate material: Epoxide woven glass
Sub−clause 4.25.1
Ambient temperature: 70 °C±2 °C
Duration: 1000 h
The current shall be applied in cycles of 1.5 h
on and 0.5 h.
The applied current shall be the rated current
Examination at 48 h, 500 h and1000 h:Visual examination
Resistance

Performance requirements

No visible damage

No visible damage∆R ≤ ±1%

No visible damage∆R ≤ ±5 %No visible damage∆R ≤ ±5 %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.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.20

Title:

No
11

12

13

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 7/11
Table−5(4)Condition of test (JIS C 5201−1)
Sub−clause 4.31
Substrate material: Epoxide woven glass
Variation of resistance with Sub−clause 4.8
temperature+20 °C / +155 °C
Mounting
Sub−clause 4.31
Substrate material: Epoxide woven glass
Damp heat, steady state
Sub−clause 4.24
Ambient temperature: 40 °C±2 °C
Relative humidity: 93 +2-3 %Without current applied.
Visual examination

Test items
Mounting

Dimensions (detail)ResistanceSub−clause 4.4.3

Performance requirements

As in Table−1

No visible damage
Legible marking∆R ≤ ±5%
As in Table−4

Mounting

Sub−clause 4.31
Substrate material: Epoxide woven glass
Enduranceatupper Sub−clause 4.25.3
category temperature
Ambient temperature:155 °C±2 °C
Duration: 1000 h
Examination at 48 h, 500 h and1000 h:Visual examination
ResistanceNo visible damage∆R ≤ ±5%

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.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.20

Title:

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 8/11

8. Taping
8.1 Applicable documents JIS C 0806−3: 2014, EIAJ ET−7200C: 2010
8.2 Taping dimensions
8.2.1 Paper taping (8mm width, 4mm pitches)
Taping dimensions shall be in accordance with Figure−3 and Table−6.
Unit: mm4±0.1
t1

Sprocket hole2±0.05

φ1.5 +0.101.75±0.1

B

8±0.2

A

t2

Carrier cavity

4±0.1

3.5±0.05
Direction of unreeling

Figure−3
Table−6AB
2.00±0.15
3.6±0.2

Style
TWLC32t1
0.8±0.1

Unit: mmt2
1.0max.

8.2.2 Embossed taping dimensions shall be in accordance with Figure−4 and Table−7.
Unit: mm
0.3 max.
2±0.05
Sprocket hole

φ1.5+0.101.75±0.1

4±0.1

Carrier cavity

t1

W

B

E

A

4±0.1

Direction of unreeling

Figure−4
Table−7
Style
TWLC50
TWLC63A
3.1±0.2
3.6±0.2B
5.5±0.2
6.9±0.2

W

E

Unit: mmt1

12±0.35.5±0.05

1.1±0.15

Product specification contained in this data sheet are subject to change at any time without notice.
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Title:

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 9/11

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 TWLC32:
Figure−5, TWLC50,63: Figure−6.
6). When the tape is bent with the minimum radius for (TWLC32: 25mm, TWLC50,63: 30mm) the tape shall maintain theirposition 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 resistors shall be faced to upward at the over coating side in the carrier cavity.
Top cover tape
Carrier tape
165°to180°

Peel−off(About 300mm/ min)Direction of unreeling

Figure−5

Top cover tapePeel−off

Carrier tape(About 300mm/min)
165° to 180°

Direction of unreeling

Figure−6

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.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.20

No: TWLC−K−HTS-0001/4
FIXED CHIP RESISTORS; RECTANGULAR TYPE & WIDE TERMINATION - LOW
OHM TWLC32, 50, 63
Page: 10/11

Title:

8.3 Reel dimension
Reel dimensions shall be in accordance with the following Figure−7 and Table−8.
Plastic reel (Based on EIAJ ET−7200C)
Unit: mm

0

+1
φ60 0

φ13±0.22±0.5φ180 −1.5

Marking A

φ21±0.8

Marking B

A

B

Figure−7
Table−8

Unit: mmB
Note
11.4±1.0
Injection molding
TWLC329 +1.0013±1.0Vacuum forming
TWLC50,63
17±1.0Vacuumforming
13 +1.00Note: Marking label shall be marked on a place of Marking A or two place of marking A and B.
Style

A

8.4 Leader and trailer tape.
(Example)

400mm min.
100mm min.

160mm min.
End

Start
Trailer

LeaderDirection of unreeling

Figure−8
9. Marking on package
The label of a minimum package shall be legibly marked with follows.
9.1 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 mark9.2 Marking B (KAMAYA control label)(5) Others

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.
Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2023.1.20