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삭제 수정 상품번호 No.134 상품검색. 홈으로쓰기목록으로 Access5143
제품정보 ▒ Texas Instrument ▒
Model : Battery Pack Protection
SPEC : 4MM Series

        
▣ Ability to proviide overcharge and short circuit protection
▣ Small size
▣ High quality and reliability
▣ Low nominal resistance (see table)
▣Fast thermal and current response
4MM Series
The Texas Instruments 4MM provides battery pack protection for laptop computers, cellular phones, protable tools
and more. By protecting against overload and limited short circuit, the 4MM can in many cases replace two device
thuseproviding a signfcaant total cost of ownership advantage.
Operation
The 4MM uses the same snap-action principle of other KLIXON   protectors. The bi-metal disc senses both heat
heat and current from the battery pack When the temperature  of the disc reaches a predetermined calibration point
the disc snaps open the contacts,  thus breaking the current path   When the battery returens to a nomal operting
range, the 4MM protector resets(closes circuit) automatically.
Overcharge & Limited Short Circuit Protection
Overcharge the 4MM sense heat buildup in the battery pack,characteristic of an overcharge condition and the
disc snaps  open the contacts at the predetermined calibration   point the wide differential between  the open and
cosing temperature of the disc cause  the 4MM to cycle slowly during a prolonged fault condition, this ensures
the average temperature fo the battery will be kept overall life of the pack.
short circuit -current passes from the lead through the current sensitive armature, during a short circuit condition,
the lapid increase in current will generate I2R heating in the arm. Materials are available with varying resistances
shich control the current sensitivity of the device(see table).    The non current carrying bimetal disc senses this 
theat hrough convection and snaps open the contacts thus beraking the circut.           When the falut condition is
removed and current returns to a nomal level, the disc will reset the circuit to its nomally closed position.
Coding Technical Characteristics
 4MMXXZ-YY      Dielectric
4MM-Series identification      1500 VAC/1Min
  XX-Opening Tempearature Maximum Berking Current of Battery
    Z-Arm Material      Up to 120A DC
  YY-Lead Configuration
Termination
Standard nickel  strip leads with customer specifiled lengths (Mylar insuration also available)
Operting Temperatures
Nominal Tolerance
Open 45 to 85℃* ±5℃
Close 45 to 65℃ ±9℃
UL Recognized
File # E34618
12V DC 5A continuous load (5K cycles)
200 Amp Limited Short Circuit
CSA Certifed
File # RL31093
Performance Curvs (Approximate : to be used for selecting samples only)

[U/TPerformance Curve]

[U/TPerformance Curve]
ULtimate trip current vs. delta temperature between Average first cycle tripping time vs. current in 25℃
protector openning temperature and protectorambient ambient. These are approximate curves, to be
temperature. These are approximate curves, to be used used only for selecting sample for verification test.
only for selecting sample for verification test.

Dimensional Specifications
  
[Am Material Specifications]
Type Arm Material Resistance *
A Ti-Cu 20milliohms
B Be-Cu 20milliohms
C Ni-Cu 30milliohms
D s-s 60milliohms
* Without Leads
[Cycle Life] *
Type Amps(@12 VDC)
100 cyles 5000 cyles
4MMXXA-YY 80A 50A
4MMXXB-YY 120A 50A
4MMXXC-YY 50A 30A
4MMXXD-YY 30A 20A
* Recommended maximum usage

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