CT102 CT103 High Accuracy Current Transformer For Industrial Energy Meter

This mini current transformer is a precision current sensing component designed for
AC current measurement, metering and protection in compact electronic equipment.
It uses a high-permeability ferrite / nanocrystalline toroidal core fully sealed in a
flame-retardant plastic housing, converting a large primary AC current into a small,
proportional and easily processed secondary signal. The through-hole (window) design
allows the primary conductor or busbar to simply pass through the aperture, so no
primary winding connection is required and installation is fast and non-invasive.

Two termination versions are available: a straight-pin version for direct PCB
soldering and a flying-lead version with a twisted red/black cable and a plug-in
connector for panel or harness assembly. The D-shaped low-profile body saves board
space in energy meters, power strips, chargers and control boards, while the epoxy
potting protects the winding against vibration, humidity and dust.

Built by a manufacturer with 26 years of magnetic component experience, this current
transformer is produced under an ISO 9001 quality system and supports full
customization of turns ratio, aperture size, lead length, connector type and housing
dimensions to match your circuit design.

• Window (through-hole) structure: the primary conductor simply passes through the
    aperture, no primary winding termination and no circuit interruption required.
• Excellent linearity and low phase error, keeping measurement stable from light load
    up to 120% of rated current.
• Fully potted with epoxy resin inside a UL94 V-0 flame-retardant housing for strong
    resistance to vibration, humidity, dust and electrical stress.
• High isolation design with 3000 V AC withstand voltage between primary and
    secondary, protecting the low-voltage measuring circuit from the power side.
• Two termination options in the same footprint family: solder pins for automated PCB
    assembly, or twisted leads with connector for quick harness plug-in.
• Compact D-shaped low-profile body that saves valuable PCB area in space-limited
    meters and control boards.
• Wide turns ratio library (1000:1 to 5000:1) so one mechanical platform covers many
    current ranges.
• Stable temperature performance from -25 C to +85 C for indoor, cabinet and outdoor
    enclosure installations.
• Low insertion impact on the measured circuit, no additional heat generation on the
    primary conductor.
• Full customization: ratio, accuracy class, aperture, pin pitch, lead length, wire
    gauge, connector model and label printing.

• Single-phase and three-phase energy meters, sub-metering modules and prepaid meters
• Smart power strips, smart sockets, smart breakers and residential energy monitors
• Solar inverters, energy storage systems and micro-inverter current feedback loops
• EV chargers and charging piles for output current monitoring and protection
• Switching power supplies and UPS units for overload and short-circuit detection
• Industrial control cabinets, PLC analog input modules and motor protection relays
• Building automation, HVAC systems and lighting control panels
• Leakage, overcurrent and residual current detection circuits
• Data center power distribution units (PDU) and branch circuit monitoring
• Home appliance and equipment load monitoring boards

• Established in 2000, with 26 years of continuous focus on magnetic components and
    power solutions for industrial control and power electronics.
• Own 10,000 sqm production base with 8 complete production lines, not a rented
    workshop and not a trading company.
• Annual transformer output of approximately 2,400KK pcs, giving stable capacity and
    reliable delivery even in peak season.
• Dedicated 20-person R&D team and 20-person QC team; engineering consultants with
    over 26 years of practical design experience.
• Annual export value of USD 42 million, serving North America (50%), Northern Europe
    (18%), South America (15%) and Southeast Asia (15%).
• Complete certification framework: ISO 9001 and ISO 14001 system certification, with
    CE, CB, UL, cUL and RoHS product certification available.
• Proven customer base including well-known appliance and signaling equipment brands
    and North American inverter manufacturers.
• Flexible trade support with DDP and DDU terms and payment by T/T, PayPal or
    Western Union.
• Full ODM / OEM service from schematic evaluation and sample building to mass
    production, with MOQ from 1,000 pcs.

• Measurement accuracy classes down to 0.1, suitable for revenue-grade metering.
• Consistent batch-to-batch performance thanks to controlled core sourcing and
    automated winding, reducing calibration workload on your production line.
• High isolation and V-0 housing improve end-product safety certification readiness.
• Non-invasive window installation shortens assembly time and lowers labor cost.
• Compact footprint releases PCB space for other functional circuits.
• Epoxy potting keeps parameters stable under vibration and humidity, extending
    field service life.
• One platform, many ratios: easy to build a full product family without redesigning
    the mechanical interface.
• Engineering support on sampling resistor selection, burden matching and signal
    conditioning circuit design.