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FAQs

  • What are the important parameters of the surge protection device?

    The types of surge protectors produced by surge protection manufacturers are mainly divided into three types: voltage switch type, voltage limit type and composite type. The switching power surge protector is a surge protector that has a high impedance when there is no surge and can be transformed into a low impedance immediately when there is a surge. Its common components are a discharge gap, gas discharge tube, thyristor and three-terminal two-way Thyristor switching element, also known as a "short-circuit surge protector".


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    Parameter 1, the types of surge protector

    The voltage-limiting surge protector has high impedance when there is no surge, but as the surge current and voltage increase, its impedance will continue to decrease. Its commonly used non-linear components are varistors and suppression diodes, also called "Clamping surge protector"

    The composite type surge protector is composed of voltage switching type and voltage limiting type components. Its characteristics can be expressed as voltage switching type, voltage limitation or both according to the characteristics of the applied voltage.

    Parameter 2, Nominal discharge current (In)

    The nominal discharge current refers to the 8/20 peak current flowing through the surge protector (SPD). The nominal discharge current of Junhe electronic power surge protector varies according to the protection level. For details, please refer to the product list page.

    Parameter 3, impulse current (Iimp)

    Determined by the current peak value Ipeak, the charge quantity Q and the specific energy W/R, it is the classification of the surge protector of the 10/350 wave type I experiment.

    Parameter 4. Maximum discharge current(Imax)

    The maximum discharge current is flowing through the surge protector, which has a peak value of 8/20 wave type current. The maximum discharge current is different for different levels of the power surge protector. For details, please refer to the product list page.

    Parameter 5, the maximum continuous working voltage(Uc)

    The maximum continuous working voltage is the maximum effective value of AC voltage or DC voltage that is allowed to be permanently applied to the surge protector. Its value is equal to the rated voltage.

    Parameter 6, voltage protection level (Up)

    The voltage protection level is a performance parameter that characterizes the voltage between the terminals of the surge protector, and its value can be selected from a list of preferred values.

    Parameter 7, residual pressure

    Residual voltage refers to the peak voltage between the terminals of the surge protector when the discharge current flows through it.

    Parameter 8, shell protection level

    The shell protection level of a surge protector refers to the degree of protection provided by the shell to prevent dangerous parts from being touched, to prevent external solid foreign objects, and to prevent water from entering the shell.


    Learn more about techwin's products:

    Smart spd, Ethernet spd, lightning protection device, thunder surge protector. welcome to contact us for help.

  • Can you print our logo instead of yours?

    Absolutely, we accept OEM and ODM services.

  • The power SPD looks the same in the market. How to choose the good quality lightning protection device?

    A. Different of technology and materials, you can check the details of the difference.


    Techwin

    Cheap model

    Shell

    PC+glass fiber,                                                          Feature: Flame retardant grade V0, high temperature resistant up to 220 Degree

    pc, plastic, feature:get soft once the temperature is above 150 degrees,

    Connector

    copper

    steel

    Potting compound

    Flame-retardant and heat-insulating potting compound

    no potting compound or just use cement

     low-temperature soldering

    145°low temperature lead-free soldering tin, 3 times cost.

    260°soldering tin, Easily lead to failure of protection and even fire

    piezoresistor

    ∅34*34

    ∅25, can not meet the standard of lightning protection.




    R&D capacity

    Own lab and technology team

    no

    Solution of lightning protection

    OEM and ODM are all available, will give you the best technology solution

    OEM only, no R&D ability

     

    B. Certification: whether have international certificates or Testing report from CNAS lab. We have UL, TUV, CE, RoHS, ISO9001, ISOD14001, ISO45001, Testing report of IEC61643-11.


  • Can we order small quantity order?

    Sure, you can.

  • What's your payment term?

    Paypal, T/T 100% before shipment.

    30% T/T as deposit, 70% balance before shipment.


  • What's your advantage?

    1.   15 experience in lightning protection solutions.

    2.   Warranty: 5 years warranty.
    3.   Professional

    • Certificates: CE, RoHS, TUV, UL, CQC, ISO9001, IS014001, OHSAS18001;

    • Testing reports: we can provide testing reports issued by an authority;

    • Patents: we have 23 patents for technology and appearance.

    4. We have our own lab and professional R&D team, OEM and ODM are available.
    5. Excellent parameters and reasonable prices.
    6. Sample can be provided if need.


  • Are you a factory or trading company?

    We are a real factory, located in Shenzhen, Guangdong, China.

  • How about your delivery date? 

    A. 3 days for Sample order.

    B. 15-30 days for bulk order. Include OEM order.

    C. 30-60 days for ODM order.

  • How to judge the quality of Signal SPD?

    For signal products, the simplest method is to connect to the system to see whether the signal is lost or slow, the image is flashing or fuzzy, some products have no problem at the beginning, which needs to run for a period of time to check again. Techwin has owed the lab and R&D team, all products are designed according to IEC61643-1,EN60950,GB/T18802.21-2002. TB/T2311-2002, YD/T 1235.2/ YD/T 1542. Coupled with a 5-year warranty period, customers can purchase with confidence.

  • What is the impedance of signal SPD in common use?

    RJ11(Radio)---600Ω

    RJ45 (Network) RS232---120Ω,

    Video---75Ω

  • What are The frequency range of antenna system and SPD option?

    Number

    Radio frequency

    Frequency range

    SPD option

    1

    GSM 900

    850-960MHz

    R27NF-1/4                  R27DF/1/4               R27NW/1/4 R27DW-1/4(800-2700MHz)

    2

    GSM 1800

    1710-1880MHz


    3

    CDMA 2000

    1940-2145MHz


    4

    TD-CDMA

    1880-2025MHz


    5

    LTE

    2010-2620MHz


    6

    Digital cluster

    350-390MHz, 806MHz-821MHz

    R25N70F

    7

    GPS

    1575.42±3MHz

    R25N70F R25B70F

    8

    Beidou

    1610-2500 MHz

    R25N70F, R25B70F

    9

    Access network

    5.725-5.85GHz        point to point

    Wireless spread spectrum         3.5GHz frequency range WLL(wireless local loop) 2.4GHz frequency range wireless spread spectrum

    R60NF-1/4 (2300-6000MHz)

    10

    Access network in countryside

    450MHz frequency range

    R05NF (400-500MHz)

    11

    USM (ultra short wave) radio station

    30-300MHz

    R25B70F


  • What are the Impedence of Antenna feeder connector in common use?

    Connector

    Another name

    Impedance

    Remark

    N

    L16

    50/75

    Communication base station, GPS, etc. use 50Ω

    DIN

    L29, 7/16

    50

    Communication base station, GPS, etc. use 50Ω

    UHF

    SL16

    50

    Less than 500MHz

    BNC

    Q9

    50/75

    50Ω for GPS, others use 75Ω

    TNC

    L9

    50/75

    Communication base station, GPS, etc. use 50Ω, others use 75Ω

    SMA/SMB


    50/75

    Communication base station, GPS, etc. use 50Ω, others use 75Ω

    F


    75

    Divided into Metric and British system, use for Cable TV


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