4 Wire Resistors (OAR) improve your precision applications
Four Terminal Resistor for Kelvin Connection LSQ Series

Direct Electronics' Kelvin style (LSQ) current sensing 4-terminal resistor family handles high-wattage applications. Providing ultralow resistance values (to 0.01 ohm) for relatively high current requirements, new four-lead cement filling resistor from Direct Electonics combine the advantages of a Kelvin configuration with PC board mounting capability.

Direct Electronics will also produce low ohmic resistor LSQ series outside these specifications to meet customer requirements.Contact us with your specific needs.

Features :
－ 4 leads for Kelvin connection with extremely low resistance values.
－ Superior anti-surge capability & Low TCR, Welded & fireproof construction.
－ Special inorganic potting construction provides high moisture resistance and thermal conductivity.

Applications :
－ Automatic Test Equipment, High Precision Instrumentation, Current Sensing Application.
－ Industrial, Medical and Military, Measurement Instrumentation.
Specification & Dimensions (Unit: mm) (LSQ-A) for Four Terminal Connection
Four Terminal Sensing (LSQ-A) Dimensions
Type Power
(Watts)		 Resistance Range
(Ω)		 Dimensions (Unit: mm)
L W±1 H±1 P±1 d±0.5
LSQ-A-3 3 R01~R1 22±1.0 8 8 14 0.8
LSQ-A-5 5 R01~R1 22±1.5 9.5 9.5 14 0.8
LSQ-A-7 7 R01~R1 35±2.0 9.5 9.5 25 0.8
LSQ-A-10 10 R01~R1 48±2.0 9.5 9.5 36 0.8
LSQ-A-15 15 R01~R1 48±2.0 12.5 12.5 36 0.8

Specification & Dimensions (Unit: mm) (LSQ-B) for Four Terminal Connection
4 Terminal Sensing (LSQ-B) Dimensions
Type Power
(Watts)		 Resistance Range
(Ω)		 Dimensions (Unit: mm)
L±2 W±1 H±1 P±1 P1±1 d±0.5
LSQ-B-5 5 R01~R1 26 5 10 20 12 0.8

Specification & Dimensions (Unit: mm) (LSQ-C) for Four Terminal Connection
4-wire Sensing (LSQ-C) Dimensions
Type Power
(Watts)		 Resistance Range
(Ω)		 Dimensions (Unit: mm)
L±2 W±1 H±1 P±1 P1±1 d±0.5
LSQ-C-10 10 R01~R1 18 10.5 20 12 5 1.0

Four Terminal Resistor Characteristic Specification (LSQ)
(LSQ) Power Derating Curve

Specification & Dimensions (Unit: mm) (LSQ-B) for Four Terminal Connection
Kelvin 4 Lead configuration (LSQ)
Test Items Test Method Specification
Resistance Tolerances   D(±0.5%), F(±1%), G(±2%), J(±5%)
Temperature Coefficients   ±100 ppm/°C
Operating Temperature Range   -55°C~275°C
Maximum Working Voltage   (P40°C x R)1/2
Terminal Tensile Strength 50N, 10s ΔR≤±1.0%R
Withstand Voltage 1000V, 1 Min. No damage on the appearance.
Short Time Overload 5 times rated power, 5s ΔR≤±4.0%R
Thermal Shock -55°C~+275°C, 5 cycles, 30 min. ΔR≤±5.0%R
Load Life 40°C, 1000h 1.5 hours on, 0.5 hours off. ΔR≤±5.0%R

How to Order
LSQ-A 15 R01 J P
Part Number
LSQ-A
LSQ-B
LSQ-C
Rated Power
3 3 Watt
5 5 Watt
7 7 Watt
10 10 Watt
15 15 Watt
Resistance Value (Ω)
R01 0.01Ω
R05 0.05Ω
R1 0.1Ω
Tolerance %
J ±5%
Package-Code
P Bulk

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