FL series

DIN 43703 DC Shunt

A current transformer cannot see DC. A calibrated shunt can: a precision alloy blade that turns a large DC current into a small, standard millivolt drop the instrument can read.

Current range1 A to 4000 A
Accuracy classClass 0.5 to 0.2
Voltage drop50, 60, 75, 100, 150, 200, 300 mV
StandardIEC 61010-1:1990
Temperature-40 °C to +60 °C
Overload120 % rated current for 2 hours
Heat load (≤ 50 A)Temperature rise not exceeding 80 °C
Heat load (> 50 A)Temperature rise not exceeding 120 °C

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Product Overview

Shunts are used to measure DC current, produced by the principle of resistance where a voltage is generated across the resistor according to the DC current.

Shunts are widely used to expand the range of instruments measuring current, with a fixed value shunt resistor in precision alloy. They can be used in communication systems, electronic machines and automatic control of power supply circuits for current limiting, and for current sampling and testing.

Application Scenarios

DC current measurement in electric meters
Communication systems and electronic machines
Automatic control of power supply circuits for current limiting
Current sampling and test work

Technical Features

Standard for installation: IEC 61010-1:1990
Accuracy class 0.5 to 0.2 across 1 A to 4000 A
Withstands acceleration of 70 m/s² and 6 hours of 80 to 120 beats per minute transport vibration
Overload performance 120 % of rated current for 2 hours
Standard voltage drops from 50 mV to 300 mV

Specifications

Specification

Parameter	Value
Installation standard	IEC 61010-1:1990
Accuracy class	1 A to 4000 A: Class 0.5 to 0.2
Temperature	-40 °C to +60 °C
Mechanical resistance	Withstands 70 m/s² acceleration and 6 hours at 80 to 120 impacts per minute
Overload performance	120 % rated current, 2 hours
Voltage drop	50 mV, 60 mV, 75 mV, 100 mV, 150 mV, 200 mV, 300 mV
Heat load, rated current below 50 A	Temperature rise not exceeding 80 °C
Heat load, rated current above 50 A	Temperature rise not exceeding 120 °C

Real Product Photography

DIN 43703 DC Shunt Gallery

FL-TK series DC shunt resistors, batch view

FL-US series DC shunt resistors for the USA market

FAQ

Questions Buyers Ask

Which voltage drop should I order?

Match the instrument. 75 mV and 60 mV are the most common panel meter inputs; 50 mV and 100 mV are common in battery and telecom systems. The drop is what the meter is scaled for, so it has to match exactly.

Why does a shunt get hot?

It dissipates I²R. The published heat load limits are a temperature rise not exceeding 80 °C below 50 A rated and 120 °C above it, which is why large shunts need free air around them.

Is DIN 43703 the same as the US pattern?

No. The European DIN 43703 footprint and the US base mounted pattern differ, and both are supplied. Say which market the panel is for when you enquire.

Can a shunt measure AC?

It can, but it is rarely the right tool: there is no isolation between the measuring circuit and the line. For AC use a current transformer.