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Metal Hybrid PPTC (MHP) Device
TE Connectivity
developed the
Metal Hybrid PPTC (MHP) Device
as a cost-effective, resettable
circuit protection
device capable of providing 30A+ hold currents at voltage ratings over 30VDC for high-rate-discharge
lithium ion
(
Li-ion
) batteries. By connecting a
bimetal protector
parallel with a
PPTC
(polymeric positive temperature coefficient) device, the resulting
Metal Hybrid PPTC
Device
offers
resettable overcurrent protection
while the
low resistance
of the
PPTC device
prevents arching of the
bimetal protector
at higher currents.
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Features
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30A hold current
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Rated at 36VDC, 100A max.
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Low device resistance (< 2mOhm) compared to other breaker devices
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Withstands heavy vibration and impact
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Easy mounting between 18650 cells
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Arc suppression: Current shunts to the PPTC due to its low resistance helping to suppress arcing all while helping protect the contacts from damage or welding shut
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Double make/double break contact design allows for a high current rating in a smaller device package
Applications
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Li-ion battery packs for high-rate-discharge applications
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Cordless power tools
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E-bikes
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Back-up power supplies (UPS)
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Back-up power for medical devices
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Motor protection
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Part Number
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Description
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Hold Current
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Trip Current
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Resistance
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Maximum Voltage
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MHP30-36-T
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Metal Hybrid PPTC Fuse
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30 Amps
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50 Amps
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1.6 mOhms
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36 Volts
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Electrical Characteristics (Typical) for MHP Devices
Part Number
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Current Trip Limits
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Operating Voltage
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Time-to-Trip
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R
TYP
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I
HOLD
@25ºC
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I
TRP
@25ºC
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V
Max
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100A@25ºC
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60A@25ºC
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(A)
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(A)
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(V
DC
)
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(Seconds)
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(Seconds)
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(mOhms)
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MHP30-36-T
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30
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50
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36
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4.5 ±1.5
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17 ±10
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1.6
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Dimensions
for MHP Devices
in Millimeters
Part Number
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A
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B
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C
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D
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E
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F
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Min.
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Max.
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Min.
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Max.
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Min.
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Max.
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Min.
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Max.
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Min.
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Max.
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Min.
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Max.
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MHP30-36-T
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25.8
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26.2
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9.2
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9.6
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5.1
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5.5
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32.8
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33.6
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6.8
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7.2
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0.9
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1.1
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