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    Clamp on Current Transformer, 100A AC

    High precision clamp-on current transformer designed for power field testing, range 0.00mA~100A AC, using the new CT technology, without disconnecting the line under test, non-contact measurement, which can be safely and quickly connected to phase detection analyzers, industrial control devices, data loggers, oscilloscopes, etc..
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    🚚 Free shipping
    🔙 30-day returns
    📅 Delivery: 7-12 days

    Clip on current transformer resolution 0.01mA AC, accuracy class 0.5, ratio 2500:1, core using Permalloy manufacturing, the influence of external magnetic field is extremely small, ensuring high accuracy, high stability, and high reliability of uninterrupted measurement year-round. Clamp type current transformer can output current and voltage signals, the range of the transformer, output signal, output interface, etc. can be customized according to customer requirements.

    Clamp current transformer

    Clamp-on current transformer makes field testing easy

    • Non-contact measurement, easy, fast, and safe operation.
    • Thin jaws, suitable for small spaces.
    • The sisco clamp current transformer uses a permalloy core for stable performance and high accuracy, and is highly resistant to interference, making it suitable for complex interference environments.
    • The range, ratio, and output interface of the sensor can be customized according to customer requirements.
    • Output connector: φ3.5mm audio plug/BNC plug/4.0mm double banana plug (optional), cable length 2m.


    High-precision clip-on current transformers is an indispensable accessories for small, medium, and large electronic companies. The sisco clamp-on current transformer is suitable for use in power equipment testing, communications and telecommunications, railway and oilfield monitoring, building and construction companies, research and teaching units, industrial and mining records, and other fields.  

    Clamp-on current transformer applications

    Model SISCO-ETCR014
    Measurement Range AC 0.00mA to 100A
    Resolution AC 0.01mA
    Accuracy Class 1.0%FS (50Hz/60Hz; 23°C±2°C)
    Turn Ratio 2500:1
    Phase Error ≤2°(50Hz/60Hz; 23°C±2°C)
    Reference Load RL:0~300mA≤300Ω;0~10A≤10Ω;0~100A≤1Ω
    Dimension 142mm (L)×46.7mm (W)×22.6mm (H)
    Jaw Size φ14mm
    Detection Method Clamp CT 
    Output Method Current Sensing Output
    Output Interface φ3.5mm audio plug / BNC plug / 4.0mm double banana plug (optional)
    Output Wire 2 Core shielded wire, wire length 2m
    Current Frequency 45Hz~60Hz (measured current frequency)
    Frequency Characteristics 10Hz to 100kHz
    Wire Position The wire under test is in the centre of the jaws
    Line Voltage Line testing up to AC 600V
    Operating Temperature and Humidity -20°C to 50°C, below 80% rh
    Storage Temperature and Humidity -10℃~60℃;less than 70%rh
    Dielectric Strength AC3700V/rms (between core and case)
    Mass 194g

    Dimension Unit (mm)

    Clamp current transformer dimensionStructure

    Clamp-on current transformer structure

    1. Coil taps
    2. Coil taps 
    3. Sensor output plug (φ3.5mm audio plug)
    4. Output lead
    5. Clamp head
    6. Directional mark identification (Identifies the same name end for phase detection)

    Output interface (optional)

    Clamp current transformer output interface


    Q1: What is a clamp-on current transformer?
    A1: Clamp-type current transformer is a kind of detection device, that can feel the information of the measured current, and can detect the felt information. Clamp AC transformers according to a certain law into a certain standard need to meet the electrical signal or other required forms of information output, in order to meet the requirements of information transmission, processing, storage, display, recording, and control. For example, switching power supply, hard switch, soft switch, etc.

    Q2: What equipment can be used with a clamp-on current transformer?
    A2: Clamp-on current transformers can be used with multimeters (mA level current grade), oscilloscopes, and other instruments, and clamp-on AC transformers can also be used as current probes.

    Q3: What are the advantages of sisco clamp-on current transformer?
    A3: sisco clamp-on current transformer is a precision current transformer, which is specially designed for power field measurement and metering use characteristics. The clamp-on current transformer is made of high permeability material, high precision, strong anti-interference ability, etc. When using the clamp-on current transformer can be directly clamped on the bus bar or bus bar without cutting off the line power outage its use is very convenient.

    Tips: Why do you need a clamp-on current transformer?

    The clamp-type current transformer is a high-precision AC current transformer. It can be used with a variety of measuring devices, such as energy meter field calibrator, multi-function energy meter, recorder, power analyzer, oscilloscope, digital multimeter, cable identification instrument, cable fault detector, double-clamp grounding resistance tester, double-clamp phase voltammetry, etc., in the state of constantly open the circuit under test, the measurement and comparison of a variety of electrical parameters.


    Thank you for buying industrial test and measurement equipment on, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.

    What is covered?

    SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.

    What is not covered?

    • Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
    • Expendable parts.
    • Routine cleaning or normal cosmetic and mechanical wear.
    • Damage from misuse, abuse or neglect.
    • Damage from use of parts other than SISCO approved.
    • Damage from use outside the product’s usage or storage parameters.
    • Damage from use of parts not sold by SISCO.
    • Damage from modification or incorporation into other products.
    • Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
    • Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
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