Home > PRODUCTS > PTC Thermistors > PTC thermistor for Overcurrent and overload protection-MZ31 series > PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 type

  • Functional characteristics
  • Brief Introduction of PTC thermistor for circuit protection:
    MZ31 series MZ9,MZ6 type PTC thermistor are circuit protection component used in RS485,232 communication interface evolved out of the program-controlled security unit used for SPC exchanges.This PTC tandem connection in RS485,232 communication interface, which can prevent damage to interface of telecommunication line effectively caused by importing 220 V electric supply due to accident broken or man-made damage, can also reduce influence to the interface of communication lines caused by lightning induction.This product has features of small steady resistance,low rated current, high voltage endurance capability and fast response etc., is economy applicable circuit protection choice of RS485,232 communication interface.

    Product Application of PTC thermistor for circuit protection:
    RS485,232communication interface protection
    PTC thermistor for RS485  protection application

    Working principle of thermistor PTC for circuit protection::
    Automatic meter reading is becoming increasingly popular in electronic power meters, this technology provides a communications port to the power meter,allowing it to be read electronically in a remote way. RS-485 is a simple, cheap, reliable communications specification that is well suitable for automatic meter reading. The PTC thermistor provides overvoltage protection in the circuit.For example if one of the RS-485 wires gets shorted to the main power line (eg, 220/380V), DXM’s PTC thermistor is specially designed for RS-485 interface protection.
    working principle of PTC thermistor used for RS485

    As indicated in Fig 2 as below,when circuit is in the normal state, the current through PTC thermistor is lower than the rated current and PTC thermistor is in the normal state with small resistance value,which will not affect the normal operation of the protected circuit such as primary and secondary loops of the voltage transformer.In case of some trouble in the circuit and the current is bigger than the rated current,the PTC will become hot quicklyand present high resistance value, which sets the circuit relatively “off” to protect the circuit from damage.After the trouble is removed,PTC thermistor will automatically restore its low resistance state and the circuit will resume normal operation.

    Advantages:
    1.Small steady resistance ;
    2.Low rated current;
    3.High voltage endurance capability;
    4.Fast response;
    5.economy applicable circuit protection choice of 485 communication interface;

    Dimension(Unit: mm):
    ptc thermistor dimension for RS485 232 protection

    dimension of ptc thermistor for RS485 protection

    Marking of Part Number:
    part number of PTC thermistor for RS485 circuit protection

    1.Series:PTC thermistor for circuit protection,overvoltage protection,overload protection
    2.Type:1-disc,2-encased,3-pin form-coating,4-pin form non-coating,5-SMD
    3.Type:A-general, B-compount, C-moduie
    4.Chip size: 8-Φ8mm 9-Φ9mm 11-Φ11mm
    5.Curie temperature: F-50℃ H-75℃ N-100℃ P-120℃ K-125℃
    6.R25 resistance: 6R0-6Ω 6R5-6.5Ω 70R-70Ω 121-120Ω
    7.Resistance tolerance: K+/-10% M+/-20% H+/-25% N+/-30%
    8.Greatly voltage:250-250V 265-265V
    9.Wire shape: S-Straight, A-Axis formed, U-In-formed

    Specification&Part No.:

    Item Part No. Non-trip current Trip current  Remarks
    Ih60℃(mA) It25℃/300S(mA)
    1 MZ31-06A300-600RM 20 100 Resistance to 220V overvoltage
    2 MZ31-06A500-800RM 15 80
    3 MZ31-10A300-600RM 25 150 Resistance to 380V overvoltage
    4 MZ31-10A500-800RM 20 120
    Item Part No. Non-trip current Trip current  Dimension (mm) 
    Ih60℃(mA) It25℃/300S(mA) Dmax Tmax фd
    1 MZ31-06E201-401RM 25 85 6.5 5 0.5
    2 MZ31-06E301-601RM 20 70 6.5 5 0.5
    3 MZ31-06E501-801RM 15 60 6.5 5 0.5
    4 MZ31-06E701-102RM 10 45 6.5 5 0.5
    5 MZ31-06E901-122RM 8 38 6.5 5 0.5
    6 MZ31-04B201-401RM 10 35 4.5 5 0.5
    7 MZ31-04B401-701RM 8.5 28 4.5 5 0.5
    8 MZ31-04B501-801RM 8 28 4.5 5 0.5
    9 MZ31-04B801-122RM 6.5 25 4.5 5 0.5
    10 MZ31-04B102-122RM 6 18 4.5 5 0.5
    11 MZ31-08E151-251RM 35 90 8.5 5 0.5
    12 MZ31-09E200-400RM 80 240 6.5 5 0.5

Send Inquiry

Please Feel free to give your inquiry in the form below. We will reply you in 24 hours.
Contact Us Tel

18927361658

Add

B2006, Building 40, Shui'an Xindu, Xinsheng Community, Longgang Street, Longgang District, Shenzhen

E-mail

info@dxmht.com

About us

About Us

Contact Us

PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 type PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 type PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 type PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 type PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 type

Copyright @ 2024 Thermistor,sensor,varistor leading manufacturer-DXMNo:84463

Copyright @ 2024 Thermistor,sensor,varistor leading manufacturer-DXM

Copyright @ 2024 Thermistor,sensor,varistor leading manufacturer-DXM

PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 typeTEL: 18927361658 PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 typeQQ: 1794139339 PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 typeinfo@dxmht.com PTC thermistor for RS485,232 circuit protection-MZ9,MZ6 type
Close