HTR India - Products - Current Sense Resistors - Ceramic Encased Resistor - HEAL (English)

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Information about HTR India - Products - Current Sense Resistors - Ceramic Encased...
Gadgets & Reviews

Published on January 31, 2014

Author: crplz



This product is a type of Ceramic Encased Resistor, which is a type of Current Sense Resistors. Features of this product are: Alloy ribbon element in square profile ceramic tube, Ceramic encased for greater heat dissipation and thermal stability, Low TCR, Negligible inductance. This product is consumable for Current Sensing for Industrial and Power Conditioning Applications.

For more information of this product, please copy & paste the url given below: All Welded construction Quartz Silica Powder CURRENT SENSE / LOW OHM CERAMIC ENCASED TYPE Fire Proof Ceramic Housing HEAL SERIES LOW OHM/LOW INDUCTANCE Current Sense Applications Tinned Copper Terminals • 2.5 W to 12 W • R 0025 to R 20 Alloy Electrical Resistance Ribbon e : PHYSICAL CONFIGURATION CURRENT SENSE / LOW OHM CERAMIC ENCASED TYPE HEAL *6mm, reduced solderability in this area HTR TYPE POWER RATING at 70°C DIMENSIONS (mm) L ±1.5 LM ±1 RESISTANCE RANGE d ±0.05 min max TYPICAL WEIGHT PER PC (gms) LC 2 2.5 W 15.0 35.0 0.8 R0025 R047 LC 4 4 W 18.0 40.0 0.8 R003 R082 1.6 2.0 LC 5 5 W 25.0 45.0 0.8/1.0 R003 R10 2.3 LC 7 7.5 W 25.0 45.0 0.8/1.0 R003 R10 4.8 LC 7A 7 W 38.0 60.0 0.8/1.0 R004 R15 4.9 LC 9 9 W 38.0 60.0 0.8/1.0 R004 R15 7.3 LC 10 10 W 38.0 60.0 1.0 R004 R15 7.5 LC 12 12 W 50.0 70.0 1.0 R008 R20 10.0 • Resistance values above the maximum range are possible on special request. Resistance values must be checked using 4½ digit micro-ohm meter with four wire system and insulated clips and the resistance value must be checked at dimension LM as given in the table above. In differing conditions please compensate by ± 0.4mΩ/cm. • LC 5 / LC 7 / LC 7A & LC 9 are also available with 1.0mmØ terminations which contributes to lowering the TCR of the resistor. * If customer require extra touch moulding then mark resistor with letter “GS”. ELECTRICAL & ENVIRONMENTAL CHARACTERISTICS / DATA PARAMETER/PERFORMANCE TEST & TEST METHOD PERFORMANCE REQUIREMENTS Power Rating (Rated Ambient Temperature) Full Power dissipation at 70°C and linearly derated to zero at +275°C - [Refer Derating curve above] Resistance Tolerances Available ±10% [K]; ±5% [J]; ±3% [H]; ±2%[G]; ±1% [F] Temperature Range -55°C to +275°C with suitable derating as per derating curve Voltage Rating / Limiting Voltage / Max Working Voltage V= Voltage Proof / Dielectric Withstanding Voltage ∆R ± (1% + R0005). No flashover, mechanical damage. Short Time Overload (5 x Rated power for 5 secs) ∆R ± [0.75% + R0005] - Average. ∆R ± [1.25% + R0005] - For resistance values near maximum range. Temperature Co-efficient of Resistance [Measured from -55°C to +125°C referenced to +25°C] ± 60 ppm/°C to 900 ppm/°C [Depending on resistance value and can be lowered by using 1mmØ terminations] Insulation Resistance > 1000MΩ (min) Temperature Cycling (Room temperature →-55°C→Room temperature →200°C →Room temperature for 5 cycles ) Damp Heat (Steady State) [40°C at 93% R.H for 1000 hours - no load applied] ∆R ± [0.5% + R0005] Endurance - Load Life [70°C with limiting voltage 1.5 hours on / 0.5 hours off for 1000 hours] ∆R ± [≤ 2.75% + R0005] - Average PxR ∆R ± [0.5% + R0005] - Average e : MECHANICAL SPECIFICATIONS PARAMETER/PERFORMANCE TEST&TEST METHOD Terminal Tensile Strength PERFORMANCE REQUIREMENTS 40 Newtons Resistance to Soldering Heat (260 - 270°C for 10 sec) ∆R ± [0.2% + R0005] - Typical Solderability (As per IEC Pub. 60068 - 2 - 20 Ta) Must meet the requirements laid down. Marking CURRENT SENSE / LOW OHM CERAMIC ENCASED TYPE As per IEC Pub. 60062 HEAL TYPICAL APPLICATIONS HEAL Series is an innovative method of providing low inductance resistors in a ceramic body. The resistive element consists of a flat metal band which is welded to tinned copper terminals before encapsulation. These resistors are finding increased use in current sensing for industrial and power conditioning applications. For effective utilization of these resistors, please refer “Applications / Design notes for current sense resistors”. Note : Due to recent technological advances, the ceramic cases used may be steatite ceramic or corderite ceramic or high alumina ceramic depending on the nature of the application. Hence, the ceramic cases may be off-white or variations of brown and variations of gray; colours which are inherent to these ceramic materials. ORDERING INFORMATION Series HTR Type HEAL LC5 / LC5* 1. 2. 3. 4. 5. Packing Resistance Value Tolerance Bulk LC5 / LC5* Tape & Ammo LC5T / LC5*T Tape & Reel LC5TR / LC5*TR R047 J For RoHS version - LC5 * For Tape / Reel - LC5 TR For 1.0mm terminations - LC5 (1) If current required during normal operation exceeds 31 amps on a continuous basis, it is advisable to opt for 2mm terminations. For this - LC5 (2). “GS” stand for Grey Silox - applicable for customer who washes PCB with solvent - LC5 GS. TAPING : Types LC 2, LC 4 & LC 5 can be supplied in taped form. Please refer the Tape / Reel specifications. e :

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