HTR India - Products - Wire Wound Resistors - Ceramic Encased Resistor - FRC (English)

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Information about HTR India - Products - Wire Wound Resistors - Ceramic Encased Resistor -...
Gadgets & Reviews

Published on January 31, 2014

Author: crplz

Source: slideshare.net

Description

This product is a type of Ceramic Encased Resistor, which is a type of Wire Wound Resistors. Features of this product are: Safety fusing at 110/120V and 220/240V, Tailor made fusing options available, Fibre glass and ceramic core available, Ceramic encased for high degree of insulation and low surface temperature. This products is consumable for Industrial and Consumer Electronics.

For more information of this product, please copy & paste the url given below:
http://htr-india.com/product/frc/

www.htr-india.com FUSIBLE RESISTORS CERAMIC TYPES Inorganic Fire Retardant Encapsulant Flame Proof High Temperature Ceramic Housing FRC SERIES Tin Plated Copper Terminals All Welded Cap and Lead Assembly FUSIBLE RESISTORS Ceramic Encased Bath Tub Type With Flame Retardant Moulding In order to meet the growing demand worldwide for resistors to fuse or blow as a safety measure, HTR can provide fusible resistor which fuse or blow if they are subjected to an abnormal spike of voltage / current. • 1W to 3W • 10R to 750R Alloy Wirewound Element On High Thermal Conductivity Ceramic Core e : info@htr-india.com

www.htr-india.com PHYSICAL CONFIGURATION FUSIBLE RESISTORS CERAMIC TYPES FRC POWER RATING at 70°C RESISTANCE RANGE DIMENSIONS (mm) W ±1 L ±1.5 H ±1 d ±0.05 min max TYPICAL WEIGHT PER PC (gms) C-1AF 1W 13.0 5.5 5.5 0.8 10R 750R 1.4 C-1F 1W 15.0 7.5 6.5 0.8 10R 680R 1.9 C-2F 2W 17.5 7.5 7.0 0.8 10R 680R 3.2 C-3F 3W 22.0 8.0 8.0 0.8 10R 560R 4.4 • Resistance values below the minimum range can be supplied on request. A bead of potting compound may be observed at the point where the termination emerges out of the ceramic case. ELECTRICAL 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 Operating Temperature Range (Ambient) -55°C to +275°C with suitable derating as per derating curve Voltage Rating / Limiting Voltage / Max. Working Voltage V= PxR Resistance Tolerances Available JIS - C - 5202 para 5.1 ±10% (K); ±5% (J); ±3% (H); ±2%(G); ±1% (F) ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA PARAMETER/ PERFORMANCE TEST TEST METHOD- DETAILS PERFORMANCE REQUIREMENTS Short Time Overload JIS - C - 5202 para 5.5 Upto 3W - condition A (RV x 2.5 for 5 secs) ∆R ± [2% + R05] Dielectric Withstanding Voltage / Voltage Proof JIS - C - 5202 para 5.7 Condition F (Limiting voltage x 2 or 500V) ∆R ± [1% + R05] No flashover, arcing or insulation breakdown Temperature Co-efficient of Resistance JIS - C - 5202 para 5.2 ± 30 ppm / °C or ± 90 ppm / °C [>10R] Depending on wire selected ± 80 ppm / °C [<10R] Insulation Resistance JIS - C - 5202 para 5.6 (Condition F) >1000MΩ (Min) Endurance - under load with humidity JIS - C - 5202 para 7.9 1000 hours at 40°C ± 2°C, 95% R.H with limiting voltage (1.5 hours on / 0.5 hours off ) ∆± [5% + R05] Load Life JIS - C - 5202 para 7.10 1000 hours at 70°C limiting voltage (1.5 hours on / 0.5 off ) ∆R ± [5% + R05] Temperature Cycling JIS - C - 5202 para 7.4 [Room temperature -55°C Room temperature 155°C Room temperature for 5 cycles.] ∆R ± [5% + R05] Damp Heat (Steady State) JIS - C - 5202 para 7.5 ∆R ± [5% + R05] Solvent Resistance JIS - C - 5202 para 6.9 Solvent A - IPA for 60secs ± 10 secs. No effect on case filling or marking MECHANICAL SPECIFICATIONS PARAMETER/ PERFORMANCE TEST TEST METHOD-DETAILS Pull Test / Robustness of Terminations Direct load for 15 secs 2 to 4.5kgs depending on size No effect Solderability JIS - C - 5202 para 6.5 PERFORMANCE REQUIREMENTS ∆R ± [1% +R05] Continuous and satisfactory (95% Min coverage) e : info@htr-india.com

www.htr-india.com TYPICAL APPLICATIONS A fusible resistor is a tailormade dual purpose component a) In normal conditions it functions as a resistor. b) In high overload / fault conditions it acts as a fuse / safety device. In some countries all types of ceramic encased / bath tub type resistors are wrongly called as fusible resistors. It must be clearly understood that fusible resistors are special purpose, specially designed resistors and are produced mainly in two configurations. a) Ceramic encased bath - tub type and b) Flame retardant silicone coated type. (Refer FRS series) FUSIBLE RESISTORS CERAMIC TYPES FRC ORDERING INFORMATION In order to design a fusible ceramic encased resistor suitable for your needs, we need the following data:1. Power rating in terms of watts. 2. Resistance in ohms. 3. Tolerance. 4. Maximum continuous working voltage across the resistor, at which the resistor must continue to function. 5. Fusing voltage - The voltage at which the resistor must fuse or blow. 6. Fusing Time - The duration within which the resistor must blow or fuse on being subjected to the fusing voltage. 7. Frequency of power source, voltage waveform. 8. Brief details of your application. In certain cases, the designer must be made aware that the compromise inherent in the trade off between resistive and fusing function make certain exact combinations not possible. Having said this, that does not mean that it is not possible to make a functional fusible resistor capable of meeting the requirement of that particular application. Generally speaking as per international standards, a fusible resistor fuses on being given fusing voltage from instantaneously to 45 seconds without any flame. At HTR if no special data is provided, we assume that if a fusible resistor is ordered, it should fuse on being given voltage calculated at 16 times power from instantaneously to 45 seconds. AT HTR, A SPECIAL “SAFETY VERSION” IS AVAILABLE IN FRC SERIES FOR RESISTANCE VALUES >10R WHERE THE RESISTOR WILL FUSE INSTANTANEOUSLY WHEN MAINS VOLTAGE 220/240V IS APPLIED WITH NO FLAME OR EXPLOSION. PLEASE SUFFIX TYPE WITH ALPHABET ‘S’. For resistance values <10R the fusing timing and suitability must be tested for each individual application. Precautions to be taken: Before conducting this test, the voltage must be correctly set / adjusted by first using a dummy piece which should then be discarded. ORDERING INFORMATION Series Type Packing Resistance Value Tolerance FRC C2F/C2F* Bulk-C2F/C2F* 47R J a) For RoHS version - C2F *. Note : THE CUSTOMER IS STRONGLY ADVISED TO ASCERTAIN THE SUITABILITY OF THE RESISTOR FOR HIS PARTICULAR APPLICATION BEFORE ORDERING IN BULK. e : info@htr-india.com

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