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CSB Series High/Low Frequency Current Sense Transformer


CSB Series High/Low Frequency Current Sense Transformer in PCB through-hole mount (THT) plug-in design with primary and secondary windings that are PC integrated, eliminating need for the customer to install primary winding separately as is usually required in toroidal designs. Low cost compact package design, featuring varnish impregnated to reduce audible noise. Plastic bobbin meets the UL 94 flammability requirement. Custom sizes and values may be engineered for your specific application.


Operating Temp-40°C to +125°C
Carry Current20A


Low frequency, high frequency, over-current sensing, isolated-current indicators, load variation sensing, proportional current feedback

Series Data Sheet (PDF)

Technical Papers

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Brochures & Catalogs



Standex Electronics | Company Video

Standex Electronics is a worldwide market leader in the design, development, and manufacture of standard and custom electro-magnetic components, including magnetics products and reed switch-based solutions.

In this video, we discuss our global manufacturing and supply chain capabilities by fueling the processes that we often take for granted every day. Through our diverse in-house capabilities and strong engineering designs we PARTNER with our customers to SOLVE their unique challenges, and DELIVER custom high-performing solutions...

Standex Electronics | Values

Standex Electronics new company video shares our global manufacturing and supply chain capabilities through our partner, solve, and deliver approach.

Standex Electronics dynamic engineering and diverse product line of custom and standard components deliver reliable high-quality solutions to customers across broad markets and applications. Our robust product offerings include Reed Switches, Relays, and Sensors, Planar Transformers and Inductors, and Fluid Level Sensors that provide solutions for the Automotive, HVAC, Alternative Energy, Lighting/LED, Appliance, Mil-Aero, Medical, and many others...

Aerospace Planar Transformer for Switch-Mode Power Supplies

In this Planar Transformer mini case study, we discuss how we partnered with an aerospace customer, delivering a coupled hybrid aerospace solution that integrated a standard planar transformer with an inductor. We solved the customer's challenge of decreasing unit costs while saving design space and improving overall performance with the added benefit of reducing electromagnetic interference (EMI).

A planar transformer, the primary component used in switch-mode power supplies, offers volumetric efficiency and a lower profile over traditional wire-wound transformers because it uses printed circuit boards (PCB) for its turns.

To find out more about how we partner, solve, and deliver solution-based engineering for power magnetics customers, visit our website at

Standex Electronics is a global leader in the design, development, and manufacturing of standard and custom planar transformer solutions.

Standex Electronics at AHR Expo 2013

Alex Vinnage talks about what attendees can expect from Standex Electronics at the 2013 AHR Expo.


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Tradeshows & Events

IEEE LI Power Electronics Symposium (Rescheduled for 2022)
Time: November 04, 2021 (12:00 - 8:00pm EST)
Place: Hauppauge Radisson, 110 Motor Parkway, Hauppauge LI NY 11788
Booth No.: Standex Electronics, Renco Electronics
For More Details, Click Here.

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