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Epoxy Encapsulated CT103 Miniature Current Power Transformer For Power Monitoring Metering

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Epoxy Encapsulated CT103 Miniature Current Power Transformer For Power Monitoring Metering

Certification : ISO9001:2015, ISO14001:2015, IATF16949, UL/cUL, ROHS, REACH, CQC

Customization : OEM & ODM Available, MOQ 100 PCS

Model Number : CT103

Application : Energy Meter, PV Inverter, EV Charger, UPS, Motor Control

Price : US$0.3-1

Mounting Type : PCB Mount / Panel Mount, Lead Wire with Connector

Supply Ability : 10,000,000pcs/month

Operating Frequency : 50Hz / 60Hz

MOQ : 100pcs

Delivery Time : 3~4 Weeks

Operating Temperature : -40°C ~ +85°C

Rated Input Current : 5A / 10A / 20A, Customizable

Payment Terms : T/T

Turns Ratio : 1000:1 / 2000:1 / 2500:1, Customizable

Brand Name : Chipsen

Product Type : Through-Hole Current Transformer / Current Sensor

Packaging Details : Carton 1: 25.5 X 21.5 X 21cm. Carton 2: 43.5 x 24.5 x 21 cm

Accuracy Class : 0.5 / 1.0

Place of Origin : China

Housing Material : Flame-Retardant Plastic, Epoxy Encapsulated

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Epoxy Encapsulated CT103 Miniature Current Transformer for Power Monitoring Metering
Product Overview

The CT103 is a miniature PCB-mount current transformer built on a toroidal core and fully encapsulated in black epoxy resin. Its D-shaped body with a central through-hole allows the primary conductor to pass directly through the window, while two straight solder pins provide a secure through-hole connection to the PCB. The sealed construction protects the winding against moisture, dust and mechanical stress, making the CT103 a compact and repeatable current-sensing solution for board-level metering and monitoring designs.

Key Features
  • High efficiency – toroidal core structure for effective magnetic coupling and low loss
  • Low noise – epoxy-encapsulated winding suppresses mechanical vibration and audible noise
  • Stable performance – sealed body keeps output consistent under humidity, dust and vibration
  • Durable & reliable – one-piece resin housing resists moisture ingress and mechanical shock
  • Space-saving PCB design – D-shaped footprint with two through-hole pins for direct board mounting
  • Open-window primary – the central aperture accepts a pass-through primary conductor, no primary winding required
Technical Specifications
Model Number CT103
Product Type Current Transformer / Current Sense Transformer
Core Type Toroidal ring core
Mounting Type PCB through-hole, 2 solder pins
Encapsulation Black epoxy resin, fully sealed
Rated Input Current 【待填写】 A
Turns Ratio 【待填写】
Sampling Resistance 【待填写】 Ω
Accuracy / Phase Error 【待填写】
Linearity Range 【待填写】
Operating Frequency 【待填写】 Hz
Dielectric Strength 【待填写】 VAC / 1 min
Operating Temperature 【待填写】 ℃
Dimensions (L×W×H) 【待填写】 mm
Aperture Diameter 【待填写】 mm
Certification 【待填写:仅填写已获证书,如 ISO 9001 / IATF 16949 / UL / VDE / CQC】

Custom electrical parameters are available on request. Please send us your rated current, turns ratio and output requirements, and our engineering team will match or develop a suitable version.

Typical Applications
  • Electric energy meters and smart metering modules
  • Power monitoring and load-current measurement boards
  • Overcurrent detection and protection circuits
  • Switching power supplies and inverter control boards
  • Industrial automation and instrumentation equipment

Please confirm the electrical rating of the CT103 against your circuit requirements before design-in.

Our Service
MOQ 100 PCS
Quotation Response Within 3 working days
Sample Production Within 7 working days
Warranty 5 years; 20 years for special industries
Customization OEM & ODM available
Production Mode MTO (Made to Order), monthly capacity 【待填写】 PCS
Trade Terms EXW / FOB / CIF
Packaging 【待填写:如 tray + anti-static bag + carton】
Need a custom current transformer?
Send us your rated current, turns ratio, output signal and PCB footprint. We reply with a quotation within 3 working days and deliver samples within 7 working days.
Epoxy Encapsulated CT103 Miniature Current Power Transformer For Power Monitoring Metering

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