Aolittel Technology Co.,Ltd
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Over Current Protection PTC Thermistor SY 16P 5Ohm 265V MZ21 For Inverter Welding Machine
Working Principle
Connect the PTC thermistor in series in the load circuit. When the circuit is in normal working condition, the current through the PTC thermistor is less than the rated current. The PTC thermistor is in the normal state and the resistance is small, which will not affect the normality of the protected circuit. jobs. When the circuit fails, the current greatly exceeds the rated current (2 times of the normal working current), and the PTC thermistor suddenly heats up, showing a high resistance state, so that the circuit is in a relatively "off" state for protection purposes. When the fault is removed, the PTC thermistor automatically returns to a low impedance state and the circuit resumes normal operation.
Application
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:
| Varistor | 07D361K 10D471K 10D681K 14D330K 14D151K 14D221K 14D391K 20D820K 20D102K 20D121K 20D121K 20D391K 20D471K 25D431K 25D751K 25D681K 25D821K 32D431K 25D751K 32D681K 32D821K |
| 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 |
| NTC Thermistor | 2.5D-20 5D-20 8D-20 47D-15 2.5D-15 47D-20 |
| Fuse | Glass fuse/Ceramic fuse 3.6x10mm/5x20mm/6.35x31.8mm/10x38mm STP/SFP/BTC/BFC/BMT/BMF/PTU/PFU Micro Fuse MTS/MFS/NTS/NFS/TMS/FMS 8x4x8mm Surface Mount Fuse 6125 2410 SET/SEF/SFE/STE/SST/SSF |
Dimension (mm)
| Part no | DMAX | W±1.0 | TMAX | Φd±0.05 |
| 16P(MZ21-P500RMN) | 18.0 | 5.0 | 5.0 | 0.8 |
Electrical Performances
| Part no | Rated resistance (25℃±1℃) | Switch temperature (±7℃) | Withstand 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℃ |
Part Numbering
MZ 2 1 - P 5 R M N
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
① : PTC Thermistor
② : Product type 2-Current Limiter 3- Delay Time
③ : 1-Coating type 2-Plastic Type 3-Empty type
④ : Switch temperature P 120C
⑤ : Resistance value- 5 Ohm
⑥ : Ohm
⑦: Tolerance K:±10%, M:±20%, N:±25%
⑧: Diameter of Chip N:Ф16mm
Resistance-Temperature curve
Current-time curve
Manufacturing Process
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 .
Manufacturing Scene
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Replacing cross part number
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