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[China]
Trade Verify
Address: No.1, Yixiang ,Liwu Industrial Park,Liwuyuan Village,Xihu District, Shilong Town,Dongguan 523325,Guangdong ,China
Contact name:James Lai
Dongguan Ampfort Electronics Co., Ltd. |
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Verified Suppliers
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Customized Single Triple MZ6 PTC Thermistor 60~180C 520mm For
Electric Motor Protection
I Overview Of The Customized Single Triple MZ6 PTC Thermistor
MZ6 Type PTC Thermistors is designed for electric
motor Protection and widely used all the world.The key
technology was introduced from the
United States of America in 1990s and has had more than 10
years production experience. It is availlable for different
products and also over temperature protection on the main
parts inside the electric motor. For example, the PTC
thermistors are embedded into the three-phase Electric motor
stator winding. When the temperature of Stator winding of
electric motor up to the insulation grade temperature of
insulated material the resistance of PTC Thermistors wil rise
at the same time.And the signal is transmitted to the
protector to switch off the current of electric motor and
finally prevent the electric motor form being burned
out. 
II Features Of The Customized Single Triple MZ6 PTC Thermistor
* Mz6 type ptc thermistors For Electric Motor Protection accords
with the international standard of DN440S1/DIN44S0S>
* The dimension of the chip is small (size: 1.8X0.6mm)
* Response is fast
* Completed sereis available
* Stable performances
* Reliable for a long time use
* Especially when lacks of phases it can rapidly respond to protect
the electric motor as well.
III Single core R-T curve And Dimension Of The Customized Single Triple MZ6 PTC Thermistor (mm)
At -20℃ to TK-20℃,R≤0.25kΩ；
At TK-5℃,R≤0.55kΩ；
At TK+5℃,R≥1.33kΩ；
At TK+15℃,R≥4kΩ.
IV Technical Specification Of The Customized Single Triple MZ6 PTC Thermistor
| Technical Specifications | Single PTC | Triple PTC | Units | |
| Max working voltage | Umax | 30 | 30 | V |
| Normal using voltage | V | ≤2.5 | ≤2.5 | V |
| Rated action temperature | Tk | 60~180 | 60~180 | ℃ |
| Tk tolerance | ±5 | ±5 | ℃ | |
| Tk repeatability | △T | ±0.5 | ±0.5 | ℃ |
Resistance in norm al temperature | R25 | ≤100 | ≤300 | Ω |
PTC resistance at some | TK-5℃ | ≤550 | ≤1650 | Ω |
PTC resistance at some | Tk+5℃ | ≥1330 | ≥3990 | Ω |
PTC resistance at some | Tk+15℃ | ≥4 | ≥12 | KΩ |
| -20℃~Tk-20℃ | ≤250 | ≤750 | Ω | |
| Tk reaction time | Td | <5 | <5 | S |
| Insulation strength | V | 2.5 | 2.5 | KV |
| Maximum storage temperature | T1max | 125 | 125 | ℃ |
| Minimum storage temperature | T1min | -25 | -25 | ℃ |
| Lead wire color | See the colorful coding below | |||
| Weight | Wt | 2 | 3.5 | g |
V Color Coding(For different temperature ratings) Of The Customized Single Triple MZ6 PTC Thermistor
Yellow wires are used between adjoining thermistors.
VI Operating Instruction Of The Customized Single Triple MZ6 PTC Thermistor
The electric motor of different insulation rank selects the
different Tk temperature thermistor, its parameter is shown at
following table(only reference).
| Electric motor insulation rank | Limited Working Temperature | Thermistor(TK) |
| Y | 90 | 80~85℃ |
| A | 105 | 95~100℃ |
| E | 120 | 110~115℃ |
| B | 130 | 120~125℃ |
| F | 155 | 145~150℃ |
| H | 180 | 170~175℃ |
| C | Above 180 | Above 180 |
VII Note for mounting Of The Customized Single Triple MZ6 PTC Thermistor
1. Insert wire in the winding wire slot of the motor,make it tidy,
and then mount the PTC thermistor in the coil of motor(as shown in
figure). 2.White mounting,do not hard beat or press the sensing
area of the thermistor for fear that the internal precise structure
of the product might be damaged.3. While mounting,do not extremely
hard pull the outgoing line of the product for fear that the
outgoing line might be pulled apart.4.Before connecting,read the
technical information about PTC temperature control module(the
former GRB motor overheat protector) for fear that the thermistor
might be damaged. 5.Securely connect the outgoing line in the
specified connection position.
VIII Error and Measure Of The Customized Single Triple MZ6 PTC Thermistor
| Breakdown | Reason | Measure |
| Resistance value is too high(measure resistance of the outgoing line by Ohm band of an AVO meter,the resistance value of a single line is higher than 100Ω at 25℃) | 1. The lead of the thermistor opened a way or was in a bad contact. | 1.Check the lead of the thermistor whether open or not,or in the bad contact 2.Replace the themistor |
| Resistance value is too high(measure resistance of the outgoing line by Ohm band of an AVO meter,the resistance value of a single line is higher than 20Ω at 25℃) | 1.The lead of thermistor was in short circuit; 2.The thermistor was
damaged | Check the lead of the thermistor is in short circuit or not,and
connect it. 2,Replace the thermistor |
| Sometimes be Normal,Sometimes be abormal, | 1.The lead of thermistor was in in bad contact; 2.The thermistor
was damaged | Connect the lead of the thermistor and the binding post tightly. |
VIIII PTC Thermistors Motor Sensor Application
· Thermal protection of winding in electric motors.
· Limit temperature monitoring.
· PTC relay units.
· Industrial electronics.
· Power supplies.
· Electronic data processing.
· Electric equipment machines.
