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Address: Room 101, No. 21, Huayuanzai Road, Chongmei, Chashan Town, Dongguan City, Guangdong Province
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Small Volume Large Power PTC Thermistor For Protection For High
Pulse Currents And A High Number Of Inrush-Power Cycles
The thermistor has high sensitivity, wide operating temperature
range, small size, easy to use, easy to process into complex
shapes, good stability, and strong overload capacity. In the
application, it can not only measure temperature as a measuring
element, but also control temperature and circuit compensation
element as a control element. According to different temperature
coefficients, thermistors are divided into positive temperature
coefficient (PTC) thermistors and negative temperature coefficient
(NTC). PTC thermistor is a thermistor with positive temperature
coefficient, which belongs to semiconductor linear element and is
sensitive to temperature. The resistance value is proportional to
the temperature change. Within a certain temperature range, the
resistance changes with temperature, and the resistivity also
increases with temperature. PTC thermistor has three
characteristics: voltage-current, current-time,
resistance-temperature. The voltage-current characteristic is a
volt-ampere characteristic, which refers to the relationship
between the voltage clamped at the terminal of the thermistor and
the current that reaches the steady state of thermal equilibrium.
Product Description
◆ Self protecting in case of overload with no risk of over-heating
◆ Encased thermistor disk with clamp contacts for high reliability
◆ For high pulse currents and a high number of inrush-power cycles
◆ Can handle 2kv energy-limited peak voltage
Application
◆ Automotive on-board charging
◆ Discharge - charge circuits
◆ Power inverters
◆ Server power surge protection
◆ Servo motor control
◆ Welding equipment
Structures and Dimensions
Electrical Specifications
| Order Number | Max. Voltage Vmax(VAC) | Max. Link Voltage VLmax(VDC) | Resistance At 25°C R25(Ω) | Curie Temp. TC (°C) | Heat Capacity Cth(J/K) | Thermal Cooling Time Constant τth (s) | Dimensions(mm) | ||
| D | H | T | |||||||
| MZ21X209-700□B6# | 260 | 370 | 70 | 120 | 0.4 | 70 | 9.0 | 13.5 | 7.5 |
| MZ21X209-121□B6# | 260 | 370 | 120 | 120 | 0.6 | 80 | 9.0 | 13.5 | 7.5 |
| MZ21X209-151□B6# | 260 | 370 | 150 | 120 | 0.6 | 80 | 9.0 | 13.5 | 7.5 |
| MZ21X212-250□B8# | 280 | 400 | 25 | 120 | 1 | 100 | 12.5 | 16.5 | 5 |
| MZ21X213-500□B8# | 280 | 400 | 50 | 120 | 1.4 | 120 | 13.0 | 18.0 | 7.5 |
| MZ21X213-800□B8# | 280 | 400 | 80 | 120 | 1.4 | 120 | 13.0 | 18.0 | 7.5 |
| MZ21X413-600□C5# | 350 | 500 | 60 | 140 | 1.45 | 105 | 13.5 | 17 | 7 |
| MZ21X315-560□D4# | 440 | 620 | 56 | 130 | 2.1 | 100 | 15.0 | 19.0 | 7.5 |
| MZ21X213-121□D4# | 440 | 620 | 120 | 120 | 1.4 | 120 | 13.0 | 18.0 | 7.5 |
| MZ21X417-600□D4# | 440 | 625 | 60 | 140 | 2.3 | 120 | 17 | 21 | 7.5 |
| MZ21X413-121□D4# | 440 | 625 | 120 | 140 | 1.45 | 105 | 13.5 | 17 | 7 |
| MZ21X213-151□D4# | 440 | 620 | 150 | 120 | 1.4 | 120 | 13.0 | 18.0 | 7.5 |
| MZ21X209-501□D4# | 440 | 620 | 500 | 120 | 0.6 | 80 | 9.0 | 13.5 | 7.5 |
| MZ21X109-103□D4# | 440 | 620 | 1100 | 115 | 0.6 | 80 | 9.0 | 13.5 | 7.5 |
| MZ21X417-121□D6# | 460 | 650 | 120 | 140 | 2.3 | 120 | 17 | 21 | 7.5 |
| MZ21X315-120□D8# | 480 | 680 | 120 | 130 | 2.1 | 100 | 15.0 | 19.0 | 7.5 |
| MZ21X413-251□D8# | 480 | 680 | 250 | 140 | 1.45 | 105 | 13.5 | 17 | 7 |
| MZ21X113-501□E6# | 560 | 800 | 500 | 115 | 1.4 | 120 | 13.0 | 18.0 | 7.5 |
| MZ21X413-501□E6# | 560 | 800 | 500 | 140 | 1.45 | 105 | 13.5 | 17 | 7 |
| MZ21X417-251□F0# | 600 | 850 | 250 | 140 | 2.3 | 120 | 17 | 21 | 7.5 |
| MZ21X413-102□F0# | 600 | 850 | 1000 | 140 | 1.45 | 105 | 13.5 | 17 | 7 |
| MZ21X417-501□G0# | 700 | 1000 | 500 | 140 | 2.3 | 120 | 17 | 21 | 7.5 |
Common models of LKMZB series overcurrent protection PTC thermistor
| Model | Curie | Resistance | Action | No action | Maximum | Naximum | Dimensions | |
| temperature | typical value | electric current | electric current | electric current | Work | |||
| @25℃ | @60℃ | @25℃ | Voltage | |||||
| Tc(℃) | Rn(Ω) | It(mA) | Ih(mA) | Imax(A) | Vmax(V) | Dmax | Hmax | |
| LKMZB-03I202-302R | 85±7 | 2500 | 16 | 3 | 0.2 | 420 | 4.0 | 5 |
| LKMZB-03I102-202R | 85±7 | 1500 | 18 | 4 | 0.2 | 420 | 4.0 | 5 |
| LKMZB04I801-122R | 85±7 | 1000 | 25 | 6 | 0.2 | 420 | 4.5 | 5 |
| LKMZB-04I501-801R | 85±7 | 650 | 28 | 7 | 0.2 | 420 | 4.5 | 5 |
| LKMZB-04I301-501R | 85±7 | 400 | 32 | 8 | 0.2 | 420 | 4.5 | 5 |
| LKMZB-04M101-202R | 105±7 | 1500 | 25 | 6 | 0.2 | 420 | 4.5 | 5 |
| LKMZB-04M801-122R | 105±7 | 1000 | 28 | 8 | 0.2 | 420 | 4.5 | 5 |
| LKMZB-04M501-801R | 105±7 | 650 | 30 | 10 | 0.2 | 420 | 4.5 | 5 |
| LKMZB-06S102-202R | 115±7 | 1500 | 30 | 10 | 0.3 | 420 | 6.5 | 5 |
| LKMZB-06S801-122R | 115±7 | 1000 | 35 | 12 | 0.3 | 420 | 6.5 | 5 |
| LKMZB-06S601-901R | 115±7 | 750 | 42 | 14 | 0.3 | 420 | 6.5 | 5 |
| LKMZB-06S501-801R | 115±7 | 650 | 45 | 15 | 0.3 | 420 | 6.5 | 5 |
| LKMZB-06S401-601R | 115±7 | 500 | 50 | 16 | 0.3 | 420 | 6.5 | 5 |
| LKMZB-06S201-401R | 115±7 | 300 | 60 | 20 | 0.3 | 420 | 6.5 | 5 |
| LKMZB-06S151-251R | 115±7 | 200 | 75 | 25 | 0.3 | 265 | 6.5 | 5 |
| LKMZB-06S101-201R | 115±7 | 150 | 80 | 28 | 0.3 | 265 | 6.5 | 5 |
| LKMZB-06S900-151R | 115±7 | 120 | 90 | 30 | 0.3 | 265 | 6.5 | 5 |
| LKMZB-06M600-100R | 105±7 | 80 | 100 | 32 | 0.3 | 265 | 6.5 | 5 |
| LKMZB-06M400-800R | 105±7 | 60 | 120 | 35 | 0.3 | 265 | 6.5 | 5 |
| LKMZB-08S301-501R | 115±7 | 400 | 80 | 20 | 0.8 | 420 | 8 | 5 |
| LKMZB-08S201-301R | 115±7 | 250 | 80 | 25 | 0.8 | 420 | 8 | 5 |
| LKMZB-08S151-251R | 115±7 | 200 | 100 | 28 | 0.8 | 420 | 8 | 5 |
| LKMZB-08S900-151R | 115±7 | 120 | 120 | 35 | 0.8 | 420 | 8 | 5 |
| LKMZB-08S600-101R | 115±7 | 80 | 140 | 40 | 0.8 | 420 | 8 | 5 |
| LKMZB-08S400-800R | 115±7 | 60 | 160 | 50 | 0.8 | 265 | 8 | 5 |
| LKMZB-08S300-500R | 115±7 | 40 | 180 | 60 | 0.8 | 265 | 8 | 5 |
| LKMZB-10S300-500R | 115±7 | 40 | 200 | 70 | 3 | 265 | 9 | 5 |
| LKMZB-10S200-300R | 115±7 | 25 | 250 | 80 | 3 | 265 | 9 | 5 |
| LKMZB-13S200-300R | 115±7 | 25 | 300 | 100 | 4 | 265 | 13 | 5 |
| LKMZB-13S100-200R | 115±7 | 15 | 360 | 120 | 4 | 265 | 13 | 5 |
| LKMZB-16S200-300R | 115±7 | 25 | 360 | 120 | 8 | 265 | 16 | 5 |
| LKMZB-16S100-200R | 115±7 | 15 | 420 | 140 | 8 | 265 | 16 | 5 |
| LKMZB-16S080-150R | 115±7 | 12 | 420 | 160 | 8 | 265 | 16 | 5 |
Note: Various types of products can be customized according to customer requirements, and the maximum non-operating current value can reach 400mA@60℃.
Note:
1.is the resistance tolerance M:±20% X:±25% N:±30% S: Special
2. is the internal control code
3.The F value can be selected for 5mm, 7.5mm, 10mm
4.The L value canbe selected for 3mm, 20mm, 25mm, 35mm
5.The d value can be selected for 0.6mm, 0.8mm, 1.0mm
6.Other type are available on request
