0ZCJ0200FF2C Polymeric PTC Resettable Fuse 6V 2A Ih Surface Mount Integrated Circuits ICs
0ZCJ0200FF2C Polymeric PTC Resettable Fuse 6V 2A Ih Surface Mount
| Bel | |
| Product Category: | Resettable Fuses - PPTC |
| RoHS: | Details |
| 0ZCJ | |
| PCB Mount | |
| SMD/SMT | |
| 2 A | |
| 6 VDC | |
| 3.5 A | |
| 100 A | |
| 80 mOhms | |
| 1206 (3216 Metric) | |
| - 40 C | |
| + 85 C | |
| Reel | |
| Cut Tape | |
| MouseReel | |
| Brand: | Bel Fuse |
| Moisture Sensitive: | Yes |
| Pd - Power Dissipation: | 800 mW |
| Product Type: | Resettable Fuses - PPTC |
| Subcategory: | PPTC Resettable Fuses |
| Type: | PTC Resettable Fuses |
| Unit Weight: | 0.007630 oz |
Type 0ZCJ Series
PTC’s – Basic Theory of Operation / “Tripped” Resistance Explanation
A Bel PTC consists of a block of polymeric material containing conductive carbon granules which
issandwiched between two conductive metal plates. When this polymer block reaches approximately
125C,either due to current passing through it via conductive chains of carbon particles or due to an
external heatsource; it swells volumetrically. This expansion breaks apart a majority of the chains of
carbon granules thatrun randomly between the two conductive plates. This behavior results in a sharp
increase in resistanceacross the two plates which all but eliminates current flow through the device,
allowing just enough residualcurrent flow to maintain the block’s internal temperature at 125C. Once this
“tripped” state current is cut off,the polymer brick cools and shrinks to its original size, thereby allowing
its broken carbon chains toreestablish themselves and permit the part to return to its low resistance state.
Once cooled to roomambient, the PTC will once again exhibit a resistance less than its “R1max” rating.
At currents below the device IHOLD rating, AND at temperatures below 100C, the PTC maintains
aresistance value below its R1 MAX rating.
The catalog data for each device specifies a "Typical Power"value. This is the power required to exactly
match the heat lost by the tripped device to its ambient surroundings at 23C. By Ohm's Law, power can
bestated as: W = E²/R. Thus the approximate resistance of a “Tripped” PTC can be determined by:
R = E²/W,where "E" is the voltage appearing across the PTC.(usually the supply's open circuit voltage),
and "W" is theTypical Power value for the particular PTC.
Since the PPTC acts to maintain a constant internal temperature, its apparent resistance will change
basedupon applied voltage and, to a lesser degree, ambient conditions. Consider the following example....
A PTC with a Typical Power of 1 watt protecting a circuit using a 60V supply will demonstrate an apparent,
tripped resistance "R" of:R = 60²/1 = 3,600 ohmsThis same tripped device when used to protect a 12V
circuit would now present an apparent resistance of:R = 12²/1 = 144 ohmsThe value for Typical Power is
"typical" because any physical factors that affect heat loss (such as ambienttemperature or air convection)
will somewhat alter the level of power that the PTC needs to maintain itsinternal temperature. In short,
PTCs do not exhibit a constant, quantifiable tripped resistance value.
Operating (Hold Current) Range
Range50mA - 2A
Product Features
- 1206 Chip Size, Fast Trip Time, Low DCR Resistance
- AEC-Q Compliant- Meets Bel automotive qualification*
* - Largely based on internal AEC-Q test plan
Maximum Voltage
6 - 60V (per table)
Temperature Range
-40°C to 85° C
