Features
™
product
Formerly a
Miniature Thermal Cutoff (TCO) device
High current type
Optimal corrosion resistant properties
Smaller body size: L5.4 x W3.2 x H0.89 mm
Overtemperature and overcurrent protection
for lithium polymer and prismatic cells
Wide range of temperature options
*R
oH
S
**
CO
HA
LO & MP
LI
GE
AN
N
T
FR
EE
This series is currently available but
not recommended for new designs.
The
Model AA Series
is a possible
replacement.
KCA Series A-Type Breaker
(Thermal Cutoff Device)
Ratings
KCA72AB0
Trip Temperature
Reset Temperature
Contact Rating
Maximum Breaking Current
Maximum Voltage
Minimum Holding Voltage
Maximum Leakage Current
Resistance
72 °C ± 5 °C
KCA77AB0
77 °C ± 5 °C
40 °C min.
KCA82AB0
82 °C ± 5 °C
KCA85AB0
85 °C ± 5 °C
DC12V / 25 A, 6000 cycles
DC5V / 60 A, 100 cycles
DC28V / 25 A, 100 cycles
2 V @ 25 °C for 1 minute
200 mA max. @ 25 °C
5 milliohms max.
2.9 ± 0.1
(.114 ± .004)
5.4 ± 0.1
(.213 ± .004)
2.9 ± 0.1
(.114 ± .004)
0.1 ± 0.01
(.004 ± .0004)
UL, cUL
TUV
File Number: E215638
File Number: R50305080
2.3 ± 0.1
(.091 ± .004)
2.3 ± 0.1
(.091 ± .004)
3.2 ± 0.1
(.126 ± .004)
0.89 ± 0.05
(.035 ± .002)
KCA 77 A B 0
DIMENSIONS:
MM
(INCHES)
Series Designator
Trip Temperature (±5 °C)
Arm Material
A = Cu Alloy, High Current Type
COVER
ARM TERMINAL
ARM
COVER PLATE
CONTACT
Terminal Type
(with/without Projection & Terminal Length)
PROJECTION
BASE
PTC
BIMETAL DISC
PROJECTION
BASE TERMINAL
AVAILABLE WITH AND WITHOUT PROJECTIONS.
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br)
and Chlorine (Cl) content is 1500 ppm or less.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
Applications
Battery cell protection for:
Notebook PCs
Tablet PCs
Smart phones
Mobile phones
KCA Series A-Type Breaker (Thermal Cutoff Device)
KCA72ABO (Low 67 °C average)
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
KCA77ABO (Low 72 °C average)
KCA82ABO (Low 77 °C average)
KCA85ABO (Low 80 °C average)
Current (A)
20
30
40
50
60
70
80
Temperature (°C)
sample at a rate of 0.1 A/minute and recording the current value when the sample trips.
NORMAL CIRCUIT
CURRENT
EXCESSIVE
CURRENT
AND/OR
HEAT
CIRCUIT
AFTER OPENING
VERY LOW CURRENT
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
KCA Series A-Type Breaker (Thermal Cutoff Device)
Solder connections should be avoided.
1253A
DIRECTION MARK
(ALPHANUMERIC
CHARACTER)
DATE CODE:
MONTH (1~9, X, Y, Z)
DATE
YEAR
MACHINE NO.
ROMAN OR ARABIC NUMERAL = OKAYAMA FACTORY
ALPHABET = SHIGA FACTORY
MANUFACTURER’S TRADEMARK
**
KCA77AB0
MANUFACTURER’S INTERNAL CODE
TERMINAL TYPE
ARM MATERIAL
(A = Cu ALLOY)
TRIP TEMPERATURE - °C
(72, 77, 82, 85)
SERIES DESIGNATOR
Plastic Bag.......................................................................................................................................................................
.........................................................................................................................................................................
Outer Box ....................................................................................................................................40,000 pcs. max. (up to 10 inner boxes)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
KCA Series A-Type Breaker (Thermal Cutoff Device)
Before using the breaker, please fully read the
DESIGN AND HANDLING CAUTIONS
stated below to avoid breaker performance deterioration
and/or damage to the breaker body or terminal.
and contact may deteriorate due to breaker arm damage.
3. Mount the breaker on your device where heat is the highest in order to transfer it effectively to the breaker.
breaker before proceeding.
increase or contact could open due to stress during handling or vibration/shock during transportation.
resistance could increase or create body damage.
9. The breaker is not washable. Do not wash.
11. When mounting and after mounting the breaker, do not apply supersonic vibration. Vibration and heat may cause breaker resistance
12. Do not use the breaker in the following environments:
a) Water, oil, chemicals or organic solutions
b) Direct sunlight, outdoor exposure, dust
c) Dew condensation, allowing the breaker to get wet
generating corrosive gas such as sulfurous acid gas
e) Strong static electric charge or electromagnetic wave
other related applications.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
KCA Series A-Type Breaker (Thermal Cutoff Device)
1.
Since the breaker body is composed of plastic parts, do not clamp or dent with tools as this could cause a resistance increase or body
damage.
cots and using tweezers is recommended.
3.
When welding breaker terminals or mounting the breaker on a cell or PCM board, be careful to avoid placing excessive stress on the
breaker body and terminals. Excessive stress may cause a resistance increase or body damage. Please refer to the following cautions:
a) Do not apply more than 10 N moment to the breaker body (refer to Figure 1)
c) Do not apply more than 20 N bending force to the breaker body (refer to Figure 3)
e) Do not apply more than 2 N force to the breaker terminals (refer to Figure 5)
f)
Do not bend terminals more than 45 ° at root (refer to Figure 6)
stress will not exceed the limits stated above.
(refer to Figure 9).
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
45 °
45 °
Figure 6
45 °
45 °
Figure 7
Rod A
Figure 8
Rod A
Rod B
Rod B
Figure 9
Due to possible updates to safety standards and other reasons, there may be changes in
milliohm meter
REV. 11/17
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at
www.bourns.com/legal/disclaimer.pdf.
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