WIRE WOUND RESISTORS CERAMIC ENCASED TYPE TM HCW Inorganic Fire Retardant Encapsulant Flame Proof High Temperature Ceramic Housing SERIES Tin Plated Copperweld(R) POWER TYPE Ceramic Encased Wire Wound Resistors Fire Proof Alloy Wire wound Element On Ceramic Substrate All Welded Cap & Lead Assembly Very high degree of insulation Low temperature on PCB solder joint 2 W to 20 W R10 to 56K PHYSICAL CONFIGURATION HCW SERIES d H L 35+3 HTR TYPE POWER RATING at 70C CW-2 2W 3W CW-3 CW-5 5W CW-7 7W CW-10 10W CW-15 15W at 25C CW-20 20W at 25C DIMENSIONS (mm) L +1.5 W +1 17.5 7.5 22.0 8.0 22.0 9.5 35.0 9.5 48.0 9.5 48.0 12.5 63.0 12.5 H +1 7.0 8.0 9.5 9.5 9.5 12.5 12.5 35+3 W RESISTANCE TYPICAL RANGE WT. min max PER PC d (gms) +0.05 0.8 0.8 0.8 0.8 0.8 1.0 1.0 R10 R10 R10 R10 R10 R10 R10 7K5 11K 11K 30K 43K 43K 56K 2.9 4.4 5.5 8.5 11.5 19.8 24.0 PULSE TYPE RESISTORS Resistors for use under pulse conditions as per IEC - 61000 - 4 - 5 available. For further information please refer to "Understanding pulse & over load capability of wire wound resistors". In case a tailor-made pulse resistor is required, please refer to "Questionnaire of data required" and provide data accordingly. ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA Test Performance Requirements Resistance tolerance + 10% [K]; + 5% [J]; +3%[H]; + 2% [G]; +1% [F] Voltage rating E = PxR Temperature co-efficient +30 to +90 ppm/ C [Depending on resistance value] Short time overload DR = +[2% + R05] Insulation resistance >1000 Mega - Dry >100 Mega - Wet Moisture resistance R = +[5% + R05] Load life test R = +[5% + R05] Derating Full power dissipation at 70C to zero at 270C (ambient) DERATING CURVE 70C Rated Power [%] 120 100 80 40 0 40 80 120 160 200 240 275 Ambient Temperature [C] ORDERING INFORMATION HCW CW-7 10K K TOLERANCE RESISTANCE VALUE HTR TYPE SERIES 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 grey; colours which are inherent to these ceramic materials. HCW WIRE WOUND RESISTORS CERAMIC ENCASED TYPE TM