Battery Mini-Breakers (Thermal Cutoff Devices)
Metal Hybrid PPTC > MHP Series
RoHS
MHP-TAT18 Series Breaker
Description
The new Metal Hybrid PPTC device, MHP-TAT18, offers a
9VDC rating and a higher current rating than typical MHP-
TAM devices. MHP-TAT18 helps to meet the battery safety
requirements of higher-capacity Lithium (Ion) Polymer and
prismatic batteries found in most mobile devices such as
laptop PC’s, tablets, and smart phones. MHP technology
connects a bimetal protector in parallel with a Polymeric
PositiveTemperature Coefficient (PPTC) device. The PPTC
device to act as a heater and to help keep the bimetal
latched until the fault is removed. The resulting MHP-
TAT18 series helps to provide resettable overtemperature
protection.
Circuit Diagram
Features
• High current capacity
with low resistance
• Compact size (L: 5.8mm
x W: 3.80mm x H:
1.15mm) allows for ultra-
thin battery pack designs
• Overtemperature and
overcurrent protection
• Evaluated to UL 60730-1
and UL 60730-2-9, CAN/
CSA E60730-1, CAN/CSA
E730-2-9 and IEC 60730-
1 and IEC 60730-2-9.
• Multiple activation
temperature ratings
(72°C, 77°C, 82°C, 85°C,
90°C)
Applications
Agency Approvals
Battery cell protection for high-capacity Lithium Polymer
and Prismatic cells used in:
• Gaming PCs
Agency
Agency File Number
E349829
• Notebook PCs
• Ultra-book
DK-74156-M1-UL
• Tablets
• Battery-powered portable devices
Typical Electrical Ratings
Part Description
OperationTemperature
Ordering Part Number
ResetTemperature
Hold Current
MHP-TAT18-9-72N
72°C+/-5°C
RF4785-000
≥40°C
MHP-TAT18-9-77N
77°C+/-5°C
RF4668-000
≥40°C
MHP-TAT18-9-82N
82°C+/-5°C
MHP-TAT18-9-85N
85°C+/-5°C
RF4629-000
≥40°C
MHP-TAT18-9-90N
90°C+/-5°C
RF4787-000
≥40°C
RF4786-000
≥40°C
18A@25°C
Contact Rating
DC 9V/30A, 6000 Cycles
DC 5V/80A, 100 Cycles
DC 28V/30A, 100 Cycles
3V
Maximum Breaking Current
Maximum Open Voltage
Minimum Hold Voltage
Maximum Leakage Current
Resistance
200mA@25°C
2.5 milliohms Max.
Precautions for Electrical Characteristics:
a. Device electrical characteristics may change depending on installation conditions. Users should independently evaluate the suitability of and test each product in their own application.
b. If any terminal or lead extensions are added to the device, especially in the case of high current discharging, the device performance may be negatively impacted due to variations
in welding methods or materials. Please avoid designs that might cause heat to be generated around the joints of the lead extensions or on the extended terminals.
c. SMT solder reflow, wave-soldering and manual soldering irons are not permitted.
© 2021 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/03/21