ZXY-CT226A Precision AC Current Transformer, 30 A Input, 1000:1 / 2000:1, Φ5 mm Through-Hole Primary, PCB Mounting, 19 x 18 x 10.2 mm

1. Product Name

ZXY-CT226A Precision AC Current Transformer, GL-CT226AB series, rated input 30 A AC, available with 1000:1 and 2000:1 turns ratios, PCB mounting. Epoxy resin encapsulated housing with a Φ5 mm primary through-hole and two secondary pins, body dimensions: height 19 mm, width 18 mm, depth 10.2 mm.

Encapsulation. The six views show the same molded part: an arched body with a through-hole penetrating the flat surface, a flange at the bottom, and two pins below the flange. No adjustment components, no terminals – the shape is the entire mechanical interface, which is why a 0.5 mm dimensional tolerance is the only tolerance the pad must absorb.

The arched section is the core window seen from the end. The core is toroidal, and the central hole is the primary: the wire passes through the opening, so the primary is a single turn of any cable passing through, while the secondary carries the multi-turn winding that steps the current down.

2. Characteristics

Through-hole primary. The conductor being measured passes through the Φ5 mm center hole, and the secondary winding is brought out to two PCB pins, so the device never connects to the circuit it measures.

Rated input 30 A AC. Rated at 30 A AC on 50/60 Hz supplies, it can cover main circuit branches or motor lines without placing a shunt in series with the path.

Two turns ratios in the same body. The 1000:1 ratio corresponds to 30 mA AC output, and the 2000:1 to 15 mA AC output, so the metering input can be matched to the required resolution.

Phase error of 5 arc minutes or better. Maintained under the load specified in the datasheet for each ratio, this makes the device suitable not only for presence detection but also for power measurement.

Linearity of 0.2% and 0.1%. The 2000:1 ratio is the more accurate of the two, and both values are measured at 25 °C over the linear range shown in the table.

The series card lists the three key parameters that determine product value side by side: 0.1% linearity error, 5 arc minute phase error, and 30 A AC rated input, with both turns ratios available. Please interpret the linearity values in conjunction with the table: 0.1% corresponds to the 2000:1 ratio, while the 1000:1 ratio is specified as 0.2%, and 0.1% is also the accuracy class printed on the housing.

3. Advantages

Epoxy resin encapsulation. The core and winding are encapsulated in epoxy resin, providing moisture sealing and fixing the components mechanically and electrically.

Flame-retardant housing. The housing meets UL94-V0 rating, which is typically required for power-side components.

Insulation resistance above 1000 MΩ. Measured under normal conditions, supported by a 4 kV dielectric strength test at 50 Hz for 1 minute.

Compact PCB mounting body. Dimensions are 19 mm × 18 mm × 10.2 mm with a pin spacing of 12.0 mm, so it stands on the circuit board rather than being placed on the board side through terminals.

Tolerance controlled to 0.5 mm. The dimensional tolerance is 0.5 mm, which is required for reliable machine placement of molded parts.

Custom designs. If the two standard turns ratios are not suitable, other ratios and loads can be manufactured on request.

The two labeled views show the same part before and after encapsulation: on the left is the matte molded part, on the right the cured epoxy filled window, with the two secondary pins as the only metal parts extending from the body. The dimension panel below gives the same 19 mm, 18 mm, 10.2 mm, and Φ5 mm dimensions as the outline drawing, while the two ratio cards repeat the 46 ± 8 Ω and 147 ± 15 Ω DC resistances that distinguish them.

4. Applications

AC current measurement and monitoring in power supplies. Reads the power supply's own output current without breaking the conductor.

Energy meters and power measurement circuits. Phase error and linearity are the two key parameters determining whether a measurement-grade device is adequate here.

Motor and load current sensing. Rated input of 30 A AC and linear range of 0-60 A AC for the 2000:1 ratio means startup surges can remain in the linear range.

Protection, control, and instrumentation equipment. The isolated, scaled current replica is exactly the signal form that protection relays or control inputs are designed to accept.

The first view shows the part in both operating states: one unit passes the primary conductor through the aperture with nothing else connected, while another unit is mounted in place via its two pins. The second view places it on an AC measurement board, with the secondary winding directly connected to the sampling resistor and signal conditioning circuitry immediately adjacent.

5. Application Specifications

The following specifications are the declared data for this series at 25 °C: product data, electrical parameter tables for each specification, outline and mechanical data, and terminal assignments with their operating rules.

5.1 Product Specifications

5.2 Electrical Specifications, Both Specifications, 25 °C

Both specifications are rated for 30 A AC input (50/60 Hz) and share the same voltage class, dielectric strength, and temperature range. They differ in turns ratio, output current, phase error sampling resistor, linear range, linearity, DC resistance, and net weight.

5.3 Outline and Mechanical Data

5.4 Terminals and Connections

Primary current flows in through P1 and returns through P2; secondary current flows out from S1 and returns through S2. P1 and P2 are the ends of the conductor passing through the center hole, not pins on the device – the only metal terminals on the housing are the two secondary pins.

6. Quality and Test Assurance

All parameters are specified at an ambient temperature of 25 °C. Test items include rated input and output current, turns ratio, phase error, linearity, DC resistance, and dielectric withstand.

The dielectric test is 4 kV at 50 Hz for 1 minute, with an operating temperature range of −40 °C to +70 °C. Insulation resistance is above 1000 MΩ under normal conditions, which is what the encapsulated structure is intended to maintain.

Brand/Manufacturer: ZXY, Shenzhen Zhi Xiang Yuan Electronics Co., Ltd. http://www.zxycoil.com