Product Description:
MZ23 MZ21 PTC Thermistor 16P 5 OHM 120C 900mA For Inverter Welding Machine
I Description Of The MZ23 MZ21 PTC Thermistor 16P
MZ21 Type Thermistor used for overcurrent protection in telecommunication and AC circuit.
Model Number:MZ23 series 15P,16P,19P type
Function:PTC Thermistor Special for over current,overload protection of welding machines.
Technical parameters of Welding machine overload protection PTC Thermistor:
16P nominal R25 resistance: conventional 6 Ω, also 3.7 Ω, 5 Ω, 7 Ω, 10 Ω, 12 Ω, 15 Ω
15P, 19P nominal resistance: Conventional 15P 101R-100Ω, 19P 101R-100Ω,also 39 Ω, 50 Ω, 120 Ω
Allow R25 resistance deviation: 100 Ω ± 30%, others: ± 25 %
Rated power: 0.5 W
The above three models are all used for overcurrent overload protection of welding machines, just different welding machine size use different PTC thermistor Model.
II Brief Introduction Of The MZ23 MZ21 PTC Thermistor 16P
MZ23 series 15P,16P,19P PTC thermistor are million- time safety thermistor of automatic circuit protection,recoverability, using repeatedly, and no trigger, noise or protective component that could protect and restore from abnormal temperature and current automatically,which called "auto restore fuse" and "ten-thousand-time fuse".Recoverability, using repeatedly, and no trigger, noise or sparks.
III Working Principle Of The MZ23 MZ21 PTC Thermistor 16P
When the circuit is in normal state, the current passing through the PTC thermistor is less than the rated current, and the PTC thermistor is normal and the resistance is small.Does not affect the normal operation of the protected circuit. When the circuit fails and the current greatly exceeds the rated current, the PTC thermistor suddenly heats up and is in a high resistance state. The circuit is disconnected to protect the circuit from damage. When the failure is eliminated, the PTC thermistor automatically returns to a low resistance state and the circuit returns to normal operation.
IV Overall Dimension Of The MZ23 MZ21 PTC Thermistor 16P
| Part No | DMAX | W±1.0 | TMAX | Φd±0.05 |
| MZ23- P500RMN | 18.0 | 5.0 | 5.0 | 0.8 |
V Characteristics Curve Of The MZ23 MZ21 PTC Thermistor 16P
VI Electrical Performance Of The MZ23 MZ21 PTC Thermistor 16P
| part no | rated resistance (25℃±1℃) | switch temperature (±7℃) | break down voltage Ac | non-operating current (at 40℃) | typical trip current | Operating ambient temperature range |
| MZ21- P500RMN | 5Ω±20% | 120℃ | 300 V | 450 mA | 900 mA | -10~+45℃ |
VII Advantage Of The MZ23 MZ21 PTC Thermistor 16P
1.Automatic circuit protection,can resume steadily,
2.contactless,noiseless and flameless,
3.reacts fast,
4. with a better performance of overvoltage protection,
5.wide operating voltage range,
6.small steady resistance,
7.low rated current,
8.small resistance,small size,
9.stable for a long time,
10.no need to be reset supply after overload protection,
11.wide operating temperature range, 0 ~ +60°C (V=Vmax), -25 ~ +125°C (V=0),
12.RoHS compliant.
Special PTC Thermistor for Welding machine overload protection
Appearance and Dimension(In: mm)
15P Thermistor:
finished product diameter 15.5-16 .0 mm, mold size is 16mm.
Foot distance is 7.5 ± 0.5 mm.
Foot length: the length of the cut foot is 5mm.
16P Thermistor: finished product diameter 17-17 .5 mm, mold size is 20 mm.
Foot distance is 5 ± 0.5 mm.
Foot length: the length of the cut foot is 8mm.
19P Thermistor:
finished product diameter 17.5-18 .0 mm, mold size is 20mm.
Foot distance is 7.5 ± 0.5 mm.
Foot length: the length of the cut foot is 6mm.
16P is thinner than 15P and 19P is thicker than 15P and 16P.
VIII Application Of The MZ23 MZ21 PTC Thermistor 16P
Inverter welding machine is more and more popular in the world since technoloy required for manufacturing,
however, good protection can assured inverter welding machine functioning well for long term. We can supply
all set of components for overcurrent protection / overvoltage protection. Below is lists we supplying our
customers for your ref:
| PTC Thermistor | 126A 15P 16P 16P5R0M265 08M12RM265 05M120-180 19P MZ72-18ROM MZ11-13N13-20 MZ12-16P2R1H140,MZ12-16P4R7H140,MZ11-16P5R0H265,MZ11-16P6R0H265,MZ11-16P7R0H265,MZ11-16P10RH265,MZ11-16P12RH265,MZ72-18RM |
VIIII Manufacturing Process Of The MZ23 MZ21 PTC Thermistor 16P
Weighing ⇒ Ball Milling ⇒ Presintering ⇒ Granulation ⇒ Forming ⇒ Sintering ⇒ Add electrode ⇒ Resistance
sorting ⇒ Pressure line ⇒ Package insulation ⇒ Assembly ⇒ Withstand voltage detection ⇒ Resistance
Inspection ⇒ Final inspection ⇒ Packaging ⇒ Put into warehouse .
X Other part number Of The MZ23 MZ21 PTC Thermistor 16P
MZ11-10N12RH250,MZ11-10N18RH265,MZ11-10N22RH265,MZ11-10P15RH265,MZ11-10P39RH265
SPMZB-9H25RH265,SPMZB-9Z1R0H15,SPMZB-9Z1R2H15,SPMZB-9Z1R8H15
WMZ12A-10RM180,WMZ12A-10RM220,WMZ12A-12RM090,WMZ12A-12RM170,WMZ12A-15RM070,
WMZ12A-15RM130,WMZ12A-15RM145,WMZ12A-15RM160,WMZ12A-15RM200,WMZ12A-18RM150,
WMZ12A-20RM070,MZ212A-20RM085,MZ23-20RM100,MZ25-20RM145,WMZ12A-22RM100,
WMZ12A-22RM120,WMZ12A-22RM130,WMZ12A-22RM180,MZ25-25RM055,MZ25-25RM060,
WMZ12A-25RM065,MZ25-25RM085,MZ25-25RM100,MZ25-25RM120,WMZ12A-33RM110,WMZ12A-35RM060,
MZ23-35RM090,WMZ12A-39RM085,WMZ12A-39RM100,MZ23-40RM080,WMZ12A-47RM055,WMZ12A-47RM090,
WMZ12A-50RM060,MZ23-50RM070,MZ23-50RM075,WMZ12A-55RM060-MZ23-55RM070,WMZ12A-62RM050,
WMZ12A-62RM075,WMZ12A-68RM045,WMZ12A-68RM050,WMZ12A-68RM055,WMZ12A-68RM060,
WMZ12A-75RM045,WMZ12A-82RM040,WMZ12A-68RM060,WMZ12A-101M030,WMZ12A-101M035,
WMZ12A-101M040,WMZ12A-101M045,WMZ12A-101M050,WMZ12A-101M055,WMZ12A-121M030,
WMZ12A-121M035,WMZ12A-121M050,WMZ12A-151M025,WMZ12A-151M030,WMZ12A-151M035,
WMZ12A-151M040,WMZ12A-221M020,WMZ12A-221M025,WMZ12A-471M006,WMZ12A-681M005,
WMZ12A-102M004,WMZ12A-152M003,WMZ12A-222M002
