Current Shunt Resistors (FL)

Low Resistance Precision Current Shunt Resistors (FL) Introduction

Token's Current Shunt Resistors (FL) aid precision measurement and high-current applications.

< >
  • Current Shunt Resistors FL Series
  • Current Shunt Resistors FL Series
  • Current Shunt Resistors FL Series
  • Current Shunt Resistors FL Series

Current shunts are low resistance precision resistors used to measure AC or DC electrical currents by the voltage drop those currents create across the resistance. Sometimes called an ammeter shunt, it is a type of current sensor.

A wide range of precision shunts, designed for use with kilowatt-hour meters and other high-current applications where a high level of accuracy is required, is now available from Token Electronics.

The interchangeable shunts (FL) are used to multiply the measuring range of measuring instrument and designed for PCB and busbar mounting, are manufactured from electron beam welded copper and manganin, and have low temperature coefficients. Featuring low inductance values, shunts FL series can handle permanent currents of up to 10000A at voltage 75 mV.

FLQ-54 type shunt is made of precision alloy board. It's copper terminals spot welded by silver alloy ensure extremely high electric capability. The construction provides a kind of excellent stability and high overloaded ability non-inductive resistor, applied widely as current limited, current balance or sampling sense in communication system, electric equipment and auto-controlling electrical circuit.

The FL Series is available in bulk packaging and is RoHS compliant and lead free. For non-standard technical requirements and special applications, contact us with your specific needs.

Download PDF Specification Low Resistance Precision Current Shunts.

Power Rating : Watts (W) = Current (I2) x Resistance Value (R)
  1. Because current shunt is resistor and dissipate heat from the current flowing through them, when they get hot.
  2. Since that heat can change their resistance and even permanently damage the shunt, so it is often given a power rating or a derating factor.
  3. In practice current shunt is often rated to be used continuously at only 2/3 of their "rated current".
  4. The heat produced is power measured in Watts (W).
Calculate Current : Current (I) = Voltage (V) / Resistance Value (R)
  1. By inserting a current shunt into a circuit whose current you want to measure your can find the current by measuring the voltage drop across the shunt.
  2. Then knowing the resistance of the current shunt you can calculate the current using Ohm's law.

Dimensions (5A-100A, Unit: mm) (FL-2)

FL-2 Type (5A-100A) ShuntsFL-2 Type (5A-100A) Shunt
Rating Current (A) Dimensions (Unit: mm) High Current Bolt (mm)-PC (Option) Shunt Voltage Bolt (mm)-PC (Option)
a c b c1 c2 H S d d1 d2
5 120 100 20     15 5 30 42 60 M5x6-2 M5x6-2
10 120 100 20     15 5 30 42 60 M5x6-2
15 120 100 20     15 5 30 42 60 M5x6-2
20 120 100 20     15 5 30 42 60 M5x6-2
30 120 100 20     15 5 30 42 60 M5x6-2
50 120 100 20     15 5 30 42 60 M5x6-2
75 104 85 22     22 10 40 53   M8x35-2
100 104 85 22     22 10 40 53   M8x35-2


Dimensions (150A-1000A, Unit: mm) (FL-2)

FL-2 Type (150A-1000A) ShuntsFL-2 Type (150A-1000A) Shunt
Rating Current (A) Dimensions (Unit: mm) High Current Bolt (mm)-PC (Option) Shunt Voltage Bolt (mm)-PC (Option)
a c b c1 c2 H S d d1 d2
150 116 85 22     22 6 30 39 54 M8x35-2 M5x6-2
200 116 85 22     22 6 30 39 54 M8x35-2
250 126 100 26     22 6 40 49 64 M10x35-2
300 126 100 26     22 6 40 49 64 M10x35-2
400 126 100 38     22 6 40 49 64 M10x35-2
500 126 100 45     22 6 40 49 64 M10x35-2
600 126 100 62     22 6 40 49 64 M10x35-2
750 126 100 76 50   22 6 40 49 64 M10x35-4
1000 126 100 95 50   22 6 40 49 64 M10x35-4


Dimensions (1500A-10000A, Unit: mm) (FL-2)

FL-2 Type (1500A-10000A) ShuntsFL-2 Type (1500A-10000A) Shunt
Rating Current (A) Dimensions (Unit: mm) High Current Bolt (mm)-PC (Option) Shunt Voltage Bolt (mm)-PC (Option)
a c b c1 c2 H S d d1 d2
1500 190 160 95 50   100 6 40 52 64 M12x60-4 M5x6-2
2000 190 160 95 50   100 6 40 52 64 M12x60-4
2500 190 160 110 50   100 13 40 52 84 M12x60-4
3000 190 160 145 2-50   100 13 40 52 84 M12x60-6
4000 190 160 195 2-50 55 100 13 40 52 84 M16x80-8
5000 284 220 195 2-50 55 150 18 40 52 88 M16x80-8
6000 284 220 210 2-50 80 150 18 40 52 88 M16x80-8
7500 290 220 320 3-50 2-60 150 18 40 52 88 M16x80-12
10000 290 220 400 3-50 2-90 150 18 40 52 88 M16x80-12

Dimensions (30A-75A, Unit: mm) (FL-13)

FL-13 Type (30A-75A) ShuntFL-13 Type (30A-75A) Shunt
Voltage (mV) Rating Current (A) Dimensions (Unit: mm) Mounting size (mm)
L B H C Bolt
75mV 30A 100 20 21 85 M5
75mV 50A 130 14 30 85 M8
75mV 75A 130 14 30 85 M8

Dimensions (100A-1000A, Unit: mm) (FL-13-A)

FL-13-A Type (100A-1000A) ShuntsFL-13-A Type (100A-1000A) Shunt
Voltage (mV) Rating Current (A) Dimensions (Unit: mm) Mounting size (mm)
L B H C C1 Bolt
75mV 100A 130 14 30 85   M8
75mV 200A 130 24 30 85   M10
75mV 300A 130 30 30 100   M10
75mV 400A 130 42 30 100   M10
75mV 500A 130 52 30 100   M10
75mV 600A 130 60 30 100 50 M10
75mV 750A 130 77 30 100 50 M10
75mV 1000A 130 95 30 100   M10

Dimensions (30A-100A, Unit: mm) (FLQ54)

FLQ54 Type (30A-100A) ShuntFLQ54 Type (30A-100A) Shunt
Type Dimensions (Unit: mm) Style of terminal
H max. B L L1
FLQ54-A 37 18 3 3 6
FLQ54-B 60 30 5 5 6
FLQ54-C 32 15 3 3 2

Technical Specifications (30A-100A) (FLQ54)

Type Rated Current (A) Rated Voltage Drop (mV) Nominal Resistance (mΩ) Accuracy Class Temperature Range (°C) Temperature Coefficient (ppm/°C)
FLQ54-A 30 50 1.6667 0.5 -55 ~ +85 ±25
FLQ54-A 50 50 1.0000
FLQ54-A 60 50 0.8333
FLQ54-B 60 50 0.8333
FLQ54-B 75 50 0.6667
FLQ54-B 100 50 0.5000
FLQ54-C 30 45 1.5000
FLQ54-C 60 45 0.7500

Characteristic Specification (FL-2, FL-13, FL-13-A)

Test Items Specification
Rated Voltage Drop 50mV, 60mV, 75mV, 100mV.
Accuracy Class 0.5% for 5~4000 A; 1% for 5000~6000 A
Over Rating Capacity 120% of rated current for 2 hours.
Ambient Conditions Temperature: -40~+60°C; relative humidity:≤95% 35°C
Giving Out Heat When Loaded Not be more than 80°C at rated current of below 50A.; not be more than 120°C at rated current of 50A and over 50A.
Capacity to Withstand Mechanical Force It is capable of withstanding the transport bumping at acceleration of 70m/S2 and shock frequency of 80-120 times/min for 5 hours.

Order Codes (FL)

FL-2 - 5A 50mV F p
 
Part Number
FL-2
FL-13
FL-13-A
FLQ54-A
FLQ54-B
FLQ54-C
 
Rating Current (A)
5A 5 A
10A 10 A
200A 200 A
750A 750 A
Voltage Drop (mV)
50mV 50 mV
60mV 60 mV
75mV 75 mV
100mV 100 mV
Accuracy Class (%)
F ±1%
D ±0.5%
Package-Code
P Bulk