CSE185L

CURRENT SENS TRANSFORMER, 3A, THT

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Manufacturer: TRIAD MAGNETICS
Product type: Current Sensing Transformers
Turns Ratio:1:50; Inductance:-; Primary Current:3A; ET Constant:30000Vµs; Frequency Range:50Hz to 400Hz; DC Resistance Secondary:0.023ohm; DC Resistance Primary:0.01 55X4442
SVHC: No SVHC (25-Jun-2025)
Inductance: -
ET Constant: 30000Vµs
Turns Ratio: 1:50
Product Range: CSE180L Series
Frequency Range: 50Hz to 400Hz
Primary Current: 3A
Transformer Mounting: Through Hole
DC Resistance Primary: 0.0195ohm
Transformer Terminals: PC Pin
DC Resistance Secondary: 0.023ohm

Delivery and price
Units per pack	50
Price	2.53 €
Current stock	10+
Lead time	30 days

Datasheet

## **Current Sense Low Frequency Transformers** ~~| nlite Be~~ 

## **- C S E 1 8 0 L s e r i e s** 

## **Description:** 

Triad’s low frequency current sense transformers are designed to monitor current from 0.1 to 30 amperes at frequencies from 50 Hz to 400 Hz. 

## **Suggested burden resistor:** 60 **Operating Temperature:** -30°C to 95°C 

## **Storage Temperature:** -50°C to 125°C 

**Maximum output voltage:** 4.0Vrms. Burden resistor value must be selected to not exceed this voltage. 

## **Electrical Specifications (@25C):** 

|**Triad**<br>**P/N**|**Current rating**<br>**Arms**|**V*usec ET**<br>**Product (Max)**|**Turns**<br>**Ratio**|**Primary DCR**<br>**mΩ Max**|**Secondary DCR**<br>**mΩ Max**|**Figure**|**Construction**|
|---|---|---|---|---|---|---|---|
|CSE184L|1|30000|1:16.67|125|23|1|Open frame|
|CSE185L|3|30000|1:50|19.5|23|1|Open frame|
|CSE186L|10|30000|1:166|2.0|23|2|Open frame|
|*CSE187L|30|30000|1:500|0.27|21|3|Open frame|
|*CSE187L-P|30|30000|1:500|0.25|21|4|Potted|



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**Construction:** 

These transformers are provided with Recognized Component electrical insulation system (OBJY2), Class 130 (B), designated “B3”. Products are designed, built and 100% tested for a hi-pot of 2500V, winding to winding and 1250V, winding to core. 

## **Agency Files:** 

*UL file E205349 – Component, Instrument Transformer (XODW2) – CSE187L and CSE187L-P only. UL file E50476 – Electrical Insulation Systems, Class “B3”, 130C 

**RoHS Compliance:** As of manufacturing date February 2016, all standard products meet the requirements of 2015/863/EU, known as the RoHS 3 initiative. 

*Upon printing, this document is considered “uncontrolled”. Please contact Triad Magnetics website for the most current version. For soldering and washing information please see http://www.triadmagnetics.com/faq.html 

Web: www.TriadMagnetics.com Phone 951-277-0757 460 Harley Knox Blvd. Fax 951-277-2757 Perris, California  92571 

Publish Date: April 18, 2019

Updated at June 4, 2026

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