Features
n Formerly a product
n Miniature Thermal Cutoff (TCO) device
n Surface mount
n Overtemperature and overcurrent protection
for lithium polymer and prismatic cells
n Controls abnormal, excessive current
virtually instantaneously, up to rated limits
n Wide range of temperature options
Applications
Battery cell protection for:
n Notebook PCs
n Tablet PCs
n Smart phones
n USB cable protection for
smart phones
SA Series Breaker (Surface Mount Thermal Cutoff Device)
* 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 legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
*RoHS COMPLIANT
LEAD FREE
*RoHS COMPLIANT
&
**HALOGEN FREE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
Ratings
Specication S-TYPE
SA72SB0 SA77SB0 SA82SB0 SA85SB0
Trip Temperature 72 °C ± 5 °C 77 °C ± 5 °C 82 °C ± 5 °C 85 °C ± 5 °C
Reset Temperature 40 °C min.
Contact Rating DC9 V / 25 A, 6000 cycles
Maximum Breaking Current DC5 V / 60 A, 100 cycles
Maximum Voltage DC28 V / 25 A, 100 cycles
Minimum Holding Voltage 3 V @ 25 °C for 1 minute
Maximum Leakage Current 200 mA max. @ 25 °C
Resistance 7 milliohms max.
™
Agency Recognition
Description
UL, cUL File Number: E215638
(UL 60730)
TUV File Number: E50373669
(EN60730-2-9)
How to Order
SA 77 S B 0
Series Designator
Trip Temperature (±5 °C)
• 72
• 77
• 82
• 85
Arm Material
C = Cu Alloy Low Current Type
S = Cu Alloy High Current Type
Terminal Type
B = 4 Terminals
(Terminal Length 1.3 mm)
Special Specication Code
Resin Type, Mfg. Internal Code, Design
Mark, etc.
X246L
77SB0
S A
0 0
Specication C-TYPE
SA72CB0 SA77CB0 SA82CB0 SA85CB0
Trip Temperature 72 °C ± 5 °C 77 °C ± 5 °C 82 °C ± 5 °C 85 °C ± 5 °C
Reset Temperature 40 °C min.
Contact Rating DC9 V / 12 A, 6000 cycles
Maximum Breaking Current DC5 V / 30 A, 100 cycles
Maximum Voltage DC28 V / 12 A, 100 cycles
Minimum Holding Voltage 3 V @ 25 °C for 1 minute
Maximum Leakage Current 200 mA max. @ 25 °C
Resistance 15 milliohms max.
Asia-Pacic:
Tel: +886-2 2562-4117
Email: asiacus@bourns.com
Europe:
Tel: +36 88 520 390
Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500
Email: americus@bourns.com
www.bourns.com
Mini-breaker TCOs reset when the following conditions are met:
• The ambient temperature has dropped by 10 °C below the minimum trip temperature
• Power to the TCO has been cycled (off/on)
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 legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SA Series Breaker (Surface Mount Thermal Cutoff Device)
Product Structure Circuit Diagram
NORMAL CIRCUIT
CIRCUIT
AFTER OPENING
ARM
TERMINAL
BASE
TERMINAL
CASE
PTC
BIMETAL
DISC
ARM
CONTACT
COVER
PLATE
Product Dimensions
DIMENSIONS: MM
(INCHES)
0.2
(.008) R
4 PLCS.
5.4 +0.25/-0.05
(.213 +.010/-.002) 1.3
(.051)
1.3
(.051)
0.48
(.019)
0.15
(.006)
8.0
(.315)
0.1 ± 0.01
(.004 ± .0004)
0.08 +0.10/-0.08
(.003 +.004/-.003)
2.0 ± 0.05
(.079 ± .002)
3.2 +0.15/-0.05
(.126 +.006/-.002)
1.09
(.043)
1.17
(.046)
1.0 ± 0.05
(.039 ± .002)
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 legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SA Series Breaker (Surface Mount Thermal Cutoff Device)
Typical Performance
The above curves were derived from placing non-PCB mounted test samples in an oven at 25 ℃, 40 ℃, 60 ℃, and 70 ℃, increasing current
ow through the sample at a rate of 0.1 A/minute and recording the current value when the sample trips. The current carrying performance is
inuenced by the PCB design due to copper resistance; users should verify actual device performance in their specic applications.
Current vs. Temperature Curves
C-Type
Current vs. Temperature Curves
S-Type
Temperature (°C)
Current (A)
9
7
6
5
4
3
2
1
0
8
10
20 30 40 50 60 70 80
SA72C (Low 67 °C avg.)
SA77C (Low 72 °C avg.)
SA82C (Low 77 °C avg.)
SA85C (Low 80 °C avg.)
Temperature (°C)
Current (A)
18
14
12
10
8
6
4
2
0
16
20
20 30 40 50 60 70 80
SA72S (Low 67 °C avg.)
SA77S (Low 72 °C avg.)
SA82S (Low 77 °C avg.)
SA85S (Low 80 °C avg.)
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 legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SA Series Breaker (Surface Mount Thermal Cutoff Device)
Surface Mount Recommendations
The Model SA Series breaker is designed for reow and hand soldering. It is not designed or warranted for ow soldering. The following
conditions must be adhered to:
Reow Soldering:
The recommended reow soldering
conditions are as follows:
150 ~ 180 °C ............... 100 ~ 150 seconds
≤220 °C........................ 20 ~ 40 seconds
255 ~ 260 °C ............... 5 ~ 10 seconds
Process breaker in a reow furnace using
the prole shown above three times,
followed by positioning the breaker in
ambient temperature of +25 °C for 8 hours.
Hand Soldering:
Place a solder iron on each of the terminal
ends for 5 seconds at +350 °C, followed by
positioning the breaker in ambient
temperature of +25 °C for 8 hours. Time (Seconds)
Temperature (°C)
0
30
60
90
120
150
180
210
240
270
060 120 180 240 300 360
TEMPERATURE
150 ~ 180 °C
≤220 °C
245 °C
_ TIME
100 ~ 150 Seconds
20 ~ 40 Seconds
Peak
.....
.....
.....
Do not expose the breaker to temperatures exceeding +260 °C.
Recommended Reow Prole
Recommended Land Pattern
5.8
(.228)
1.6
(.063)
1.6
(.063)
9.0
(.354)
2.4
(.094)
0.6
(.024)
0.9
(.035)
0.9
(.035)
Recommended Mask Thickness: 0.12 mm
Recommended Solder Particle Size: 30 µm
Mounting Cautions
In order to protect the housing and mechanical parts inside from deformation, prevent excessive load at the time of part absorption / part
deployment and mounting. A part absorption nozzle more than 2 mm in diameter with a 3 N (5 N max.) mounting load is recommended. Any
shock to the product by the nozzle during the mounting procedure may have a negative inuence on the function of the breaker.
DIMENSIONS: MM
(INCHES)
Standard Packaging Specications
Reel (13 inch) ..................................................................................................................................................................5,000 pcs. (xed)
Outer Box (690 mm x 344 mm x 136 mm) ....................................................................................................................50,000 pcs. (xed)
Marking .......................................... A label will be attached on the reel and outer box which includes the following items, at a minimum:
Part name, part number, quantity, lot number, safety approval mark (UL, etc.),
company name (Bourns KK) and any other items required by the customer
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 legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SA Series Breaker (Surface Mount Thermal Cutoff Device)
REEL
CARRIER TAPE
0.30 ± 0.05
(.012 ± .002)
1.30 ± 0.1
(.051 ± .004) 1.50
(.059)
NOTES:
1) The corner and ridge radiuses (R) of inside cavity
are 0.3 mm / (.012 in.) max.
2) Cumulative tolerance of 10 pitches of the sprocket
hole is ±0.2 mm / (.008 in.).
3) Measuring of cavity positioning is based on cavity
center in accordance with JIS/IEC standard.
5 °
2.00 ± 0.1
(.079 ± .004)
1.75 ± 0.1
(.069 ± .004)
7.50 ± 0.1
(.295 ± .004)
16.00 +0.3/-0.1
(.630 +.012/-.004)
8.45 ± 0.1
(.333 ± .004)
5.65
(.222)
3.75 ± 0.1
(.148 ± .004)
4.00 ± 0.1
(.157 ± .004)
1.50 +0.1/-0
(.059 +.004/-.000)
DIA.
5 °
8.00 ± 0.1
(.315 ± .004)
17.5 ± 1.0
(.689 ± .039)
21.5 ± 1.0
(.846 ± .039)
21.0 ± 0.8
(.827 ± .031)
1.0
(.039)R
13.0 ± 0.2
(.512 ± .008) DIA.
DIA.
CENTER HOLE
ENLARGEMENT
2.0 ± 0.5
(.079 ± .020)
2.0
(.079) 2.8
(.110)
2.0
(.079)
13.0 ± 0.2
(.512 ± .008)
80.0 ± 1.0
(3.150 ± .039)
DIA.
330.0 ± 2.0
(12.992 ± .079)
DIA.
10.0
(.394) DIA.
90.0
(3.543) DIA.
35 °
5.0
(.197)
R
0.2
0.4
0.6
0.8
DIMENSIONS: MM
(INCHES)
Recommended Mask Thickness: 0.12 mm
Recommended Solder Particle Size: 30 µm
Typical Part Marking
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 legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SA Series Breaker (Surface Mount Thermal Cutoff Device)
Application Temperature Range
........................................... -30 ~ 100 °C
Storage Conditions
1) The breaker must be stored in the standard packaging with the following conditions:
ambient temperature of -10 to +40 °C, RH <75 % with no radical temperature
change, direct sunshine, excessive vibration or shock.
2) Avoid storage locations where there is a possibility of generating corrosive gas
such as from salt breeze, chlorine, hydrogen sulde, ammonium, sulde-oxidation,
hydrogen chloride, acetate, etc.
3) Storage period should be no longer than 24 months from date of shipment.
DATE CODE:
MONTH (1~9, X, Y, Z)
DATE
YEAR
MACHINE NO.
ROMAN NUMERAL (I, II, III, ETC.) or
ARABIC NUMERAL (1, 2, 3, ETC.) = OKAYAMA FACTORY
ALPHABET = SHIGA FACTORY
9016L
11
SA 77SB0
SERIES DESIGNATOR
MANUFACTURER’S
INTERNAL CODE
(ALPHANUMERIC CHARACTER)
TRIP TEMPERATURE - °C
(72, 77, 82, 85)
ARM MATERIAL
(C = Cu ALLOY LOW CURRENT TYPE, S = Cu ALLOY HIGH CURRENT TYPE)
SPECIAL SPECIFICATION CODE
(RESIN TYPE, MFG. INTERNAL CODE, DESIGN MARK, ETC.)
TERMINAL TYPE
(0 = 4 TERMINALS, 1.3 mm LENGTH)
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 legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SA Series Breaker (Surface Mount Thermal Cutoff Device)
Caution when using Breaker
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.
DESIGN CAUTIONS
1. Use within the electrical ratings specied in this data sheet. If used over the rating of voltage or current, ON-OFF life might be impacted
and contact may deteriorate due to breaker arm damage.
2. If used over the maximum electrical rating specied in this data sheet, the circuit may not open safely or operate properly. Please test your
device for any abnormalities and conrm that the breaker will open the circuit safely in your device.
3. Mount the breaker on your device where heat is the highest in order to transfer it effectively to the breaker.
4. If the breaker is afxed with an adhesive (resin, etc.), before proceeding, fully test, evaluate and verify that the adhesive presents no
negative effects on the breaker before proceeding.
5. After the breaker is mounted, afx it so that the breaker body and terminals will not move. If not afxed properly, breaker resistance could
increase or contact could open due to stress during handling or vibration/shock during transportation.
6. Mount the breaker body and terminals in a straight and at direction. If the body and terminals are mounted in a twisted condition, breaker
resistance could increase or create body damage.
7. If breaker is to be resin-molded, test and evaluate the application to determine whether the breaker can be used effectively.
8. The breaker cannot be used as a repetitive ON-OFF thermostat.
9. The breaker is not washable. Do not wash.
10. Do not let a solder iron touch the breaker body.
11. Do not attach solder to the breaker body.
12. When mounting and after mounting the breaker, do not apply supersonic vibration. Vibration and heat may cause breaker resistance
to increase or may cause body damage. If you plan to apply supersonic vibration after mounting the breaker, you will need to evaluate
whether the breaker is suitable for your specic application. The breaker is not designed or warranted to withstand supersonic vibration.
13. Do not use the breaker in the following environments:
a) Water, oil, chemical or organic solutions
b) Direct sunlight, outdoor exposure, dust
c) Dew condensation, where the breaker could get wet
d) Salt breeze, chlorine, hydrogen sulde, ammonium, sulde-oxidation, hydrogen chloride, acetate and anywhere there is a possibility of
generating corrosive gas such as sulfurous acid gas
e) Strong static electric charge or electromagnetic wave
14. The breaker is not designed or tested for, and should not be used in, aerospace, airplane, nuclear, military, life-sustaining medical and
other related applications.
REV. 05/18
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 legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
SA Series Breaker (Surface Mount Thermal Cutoff Device)
Caution when using Breaker (Continued)
HANDLING CAUTIONS
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.
2. Breaker terminals are thin copper-alloy with right angle edges. Handle carefully to avoid injury to ngers. Handling while wearing nger
cots and using tweezers is recommended.
3. When 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 5 N moment to the breaker body (refer to Figure 1)
b) Do not apply more than 1.5 cN-m twist torque to the breaker body (refer to Figure 2)
c) Do not apply more than 15 N bending force to the breaker body (refer to Figure 3)
d) Do not apply more than 0.4 cN-m twist torque to the breaker terminals (refer to Figure 4)
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)
g) Do not twist terminals more than 20 ° with the breaker body afxed.
Rod A
Rod B
Rod A
Figure 1 Figure 2
Figure 9
Figure 3 Figure 4
Figure 5 Figure 6
Figure 7 Figure 8
Rod B
45 °
45 °
45 °
45 °
milliohm meter
Due to possible updates to safety standards and other reasons,
there may be changes in specications for this data sheet without
prior notication. Therefore, before design-in for your application,
please contact us for the most up-to-date specications.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
its aliates (collectively, “Bourns”).
Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
without notice. Users should check for and obtain the latest relevant information and verify that such information is current
and complete before placing orders for Bourns® products.
The characteristics and parameters of a Bourns® product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns® product in a user application may vary
from the data sheet characteristics and parameters due to (i) the combination of the Bourns® product with other components
in the user’s application, or (ii) the environment of the user application itself. The characteristics and parameters of a Bourns®
product also can and do vary in dierent applications and actual performance may vary over time. Users should always verify
the actual performance of the Bourns® product in their specic devices and applications, and make their own independent
judgments regarding the amount of additional test margin to design into their device or application to compensate for
dierences between laboratory and real world conditions.
Unless Bourns has explicitly designated an individual Bourns® product as meeting the requirements of a particular industry
standard (e.g., ISO/TS 16949) or a particular qualication (e.g., UL listed or recognized), Bourns is not responsible for any
failure of an individual Bourns® product to meet the requirements of such industry standard or particular qualication. Users
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Bourns® products are not recommended, authorized or intended for use in nuclear, lifesaving, life-critical or life-sustaining
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or environmental damage. Unless expressly and specically approved in writing by two authorized Bourns representatives
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bilingual versions are available at:
Web Page: http://www.bourns.com/legal/disclaimers-terms-and-policies
PDF: http://www.bourns.com/docs/Legal/disclaimer.pdf
C1753 05/17/18R
